Статті в журналах: "Insulating solution"

1

Zach, Jiri, Jitka Peterková, and Nikol Žižková. "Development of Materials Based on Flax for Thermal Insulation and Thermal Rehabilitation of Structures." Advanced Materials Research 688 (May 2013): 153–57. http://dx.doi.org/10.4028/www.scientific.net/amr.688.153.

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Thermal restoration of building constructions presents a complex of measures during renovation and life prolongation of buildings. It is a solution including restoration of bearing parts of the construction, solutions of moisture questions and the thermal insulation and new surface treatments of the construction. After application of the thermal insulation total energy intensity for heating and cooling is reduced and the thermal comfort inside insulated object is improved. Nowadays at application of thermal insulating systems a huge amount of insulants produced from non-renewable materials (EPS, PUR) is needed or the production of these is energy demanding (rock wool). Some of them, namely foam-plastic insulating materials are not compatible with original walling materials and after its application the diffusion flow is frequently limited in direction to exterior. The paper describes possibilities of production of insulants from flax waste and use of such insulating materials in the field of exterior heat insulating materials for existing objects.

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2

Zagorodnyuk, L. Kh, D. A. Sumskoy, and S. V. Zolotykh. "EFFECTIVE HEAT-PROTECTIVE SYSTEM WITH THE USE OF THERMAL INSULATING SOLUTION OF REDUCED DENSITY." Russian Automobile and Highway Industry Journal 16, no. 3 (July 4, 2019): 323–33. http://dx.doi.org/10.26518/2071-7296-2019-3-323-333.

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Introduction. The manuscript is devoted to the actual problem of thermal insulation of buildings and structures. The paper presents a developed low-density insulation solution with improved heatengineering characteristics. The aim of the work is to increase the efficiency of the heat-shielding system using a low-density heat-insulating solution.Methods and materials.The authors carried out tests at the site of heat engineering control of LLC «Intellect-service-ZBK-1» to determine the resistance to heat transfer of the enclosing structure.Results.The construction of the wall system consisting of the «Aerobel» D500 gas-silicate block (625×200×250 mm) and made on a low-density heat-insulating masonry mortar, as well as with the use of a heat-insulating mortar and a universal «Moutrical» energy-efficient coating allowed increasing actual reduced heat transfer resistance from 0.9 to 1.4 (m2 ·K) / W (by 36%).Discussion and conclusions.Laboratory research and field tests that meet the requirements of state standards and that develop low-density heat-insulating plaster demonstrate the low-density heatinsulating solution, which indicates the feasibility in thermal insulation of buildings and structures. The authors achieve special economic and ecological effect in connection with the use of local raw materials and waste production of expanded perlite sand.

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3

Colombo, Isabella Giorgia, Matteo Colombo, and Marco Di Prisco. "TRC sandwich solution for energy retrofitting." Acta Polytechnica CTU Proceedings 33 (March 3, 2022): 98–104. http://dx.doi.org/10.14311/app.2022.33.0098.

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Concerning energy improvement of existing façades, a favourable system involves prefabricated multilayer panels, made of internal insulation core and outer textile reinforced concrete layers. It is a convincing alternative to external thermal insulation composite systems (ETICS) and ventilated façades, and it meets all the requirements for façade systems. The main advantage is the possibility toapply the panel using a crane, without any scaffolding. The paper considers two solutions: the former uses expanded polystyrene (EPS) as insulating material; the latter substitutes EPS with an innovative green insulation material made of inorganic diatomite. The paper aims at comparing the solutions in terms of mechanical properties of the components and behaviour of the composite sandwich at lab-scale level. Numerical models, previously calibrated, will be instrumental for the discussion.

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4

Radwan, Ali, Ahmed Diab, Abo-Hashima Elsayed, Yehya Mohamed, Hassan Haes Alhelou, and Pierluigi Siano. "Transformers Improvement and Environment Conservation by Using Synthetic Esters in Egypt." Energies 14, no. 7 (April 3, 2021): 1992. http://dx.doi.org/10.3390/en14071992.

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Distribution transformer (DT) is a crucial component in power systems as it exchanges energies between different voltage levels or between utility grid and DC microgrids. Nevertheless, the operation of an oil-immersed DT is limited by the thermal and electrical capabilities of the internal insulating liquid. This paper aims to raise the efficiency of distribution transformers and preserve the environment by using a biodegradable insulating liquid instead of the conventional mineral insulating oil (MIO). This work examines the Egyptian case, where a real distribution network located in middle Egypt is selected as a pilot project. Study and analysis of the status que of the insulation system inside DTs are done with the aid of fault-tree analysis. The deficiency of the insulation system is confirmed by conducting an electronic survey of 100 expert participants. The most appropriate solution among three different alternatives is confirmed using the weighting and ranking method. The best choice suitable for the selected area is the substitution of MIO by synthetic ester (SE). The technical and environmental advantages achieved by the presented solution are discussed. The feasibility studies have proven that the solution is positively acceptable in all aspects. An execution plan is established for the application of proposed solution on the selected Egyptian distribution network.

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5

Yakovchuk, R., A. Kuzyk, O. Miller, and A. Lyn. "HEAT INSULATION-APPARATUS SYSTEMS OF HOUSEHOLD FACADE AS A FACTOR OF INCREASED FIRE HAZARD." Fire Safety, no. 32 (August 14, 2018): 80–89. http://dx.doi.org/10.32447/20786662.32.2018.12.

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The paper analyzes the problems associated with the fire hazard of the application of thermal insulation and finishing systems of facades of buildings, which directly depends on the design solution of the thermal insulation system and the type of thermal insulation material. The generalized requirements for physical and technical indicators of the quality of heat-insulating materials; the possibility of applying facade heat insulation structures depending on their class, the height of the houses and the combustibility of the materials of the heat-insulating and finishing layers; fire-technical characteristics of expanded polystyrene are considered. The threats of fire spreading by thermal insulation systems of facades are analyzed and possible ways of its propagation between floors are considered. It is concluded that the use of combustible thermal insulating materials poses an increased danger to life and health of people during a fire. The problem of ensuring the fire safety of buildings, in which the insulation and finishing systems of exterior walls are used, depends on a number of factors and requires a more thorough study.

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6

Břenek, Aleš, Vojtěch Václavík, Tomáš Dvorský, Jaromír Daxner, and Vojtech Dirner. "Built-In Moisture Process in Structure with Damaged Waterproofing after the Application of Thermal Insulation Boards." Advanced Materials Research 1020 (October 2014): 591–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1020.591.

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The article deals with energy rehabilitation of a building with damaged waterproofing of its lower structure. The reference construction is made of fired bricks, whose functional properties are perfectly fine, but the thermal insulation properties are insufficient for this time. The most common solution of such a problem is the application of a thermal insulating material based on expanded polystyrene on the building envelope. Unfortunately, these solutions often entail the risk of moisture problems in places that appeared to be dry before. The article compares the current solution with the new one relying on material based on calcium silicate [4] with high moisture transport capabilities as an alternative insulation of these buildings.

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7

Qian, Jing, and Yanbing Zhao. "Insulating Packaging Solution Based on Cylinder Model." Mathematical Problems in Engineering 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/972589.

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Insulating packaging is used in a variety of applications as a thermal protection for temperature-sensitive products. With computer simulation, one spherical shell model and one cylinder model are identified as suitable result for insulating packaging solution. Based on the cylinder model, the insulating packaging solution is achieved by using “minimum packaging cost” as an optimization target. The comparison of results predicted from the present model with benchmark experimental data shows satisfactory agreement in terms of packaging duration.

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8

Li, Yu Mei, Tao Ding, and Zong Tao Chen. "Structural Optimization and Electric Field Analysis on the Insulation Structure of UHDV Wall Bushing." Advanced Materials Research 732-733 (August 2013): 1052–55. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.1052.

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The insulation mechanism of UHVDC wall bushing is discussed. Design solution of the insulation structure is determined. In the solution, internal insulation includes SF6 gas-insulated and shielding structure, and external insulation is a type of composite insulating material, which is made up of epoxy FRP pipe and silicone rubber sheds. Creepage distance of external insulation and two types of shielding structures are designed in the paper. Finally two types of shielding structure are compared and optimized based on electric field simulation, and the result shows that dual-plate grounded shielding can enable the electric field strength of UHVDC wall bushing more evenly distributed.

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9

GRACHEV, Vladimir V., Aleksandr V. GRISHCHENKO, and Marina A. SCHREIBER. "Methodology for assessing the degree of moisture ingress into the insulation of traction electric motors of diesel locomotives." BULLETIN OF SCIENTIFIC RESEARCH RESULTS 2021, no. 4 (December 2021): 47–56. http://dx.doi.org/10.20295/2223-9987-2021-4-47-56.

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Objective: To develop a method for assessing the degree of moisture absorption by the traction electric motor (TEM) insulation. Methods: Based on the analysis of one-dimensional diffusion of liquid into the insulating material of the TEM windings, it has been shown that cracks increase its saturation with liquid. The proposed analytical solution for anisotropic diffusion of liquid into a cracked insulating material has been investigated. Results: An analytical model has been developed that describes the ideal moisture absorption according to the Fick's law, and it has been shown that it is suitable for calculating the diffusion of moisture into the insulating materials of the TEM windings. Practical importance: Further research should be aimed at obtaining material properties in a moisture-controlled environment

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10

Lee, Gihyun, Sohee Kim, and Sungbo Cho. "Impedance Characterization of the Degradation of Insulating Layer Patterned on Interdigitated Microelectrode." Journal of Nanoscience and Nanotechnology 15, no. 10 (October 1, 2015): 7573–77. http://dx.doi.org/10.1166/jnn.2015.11147.

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Life-time and functionality of planar microelectrode-based devices are determined by not only the corrosion-resistance of the electrode, but also the durability of the insulation layer coated on the transmission lines. Degradation of the insulating layer exposed to a humid environment or solution may cause leakage current or signal loss, and a decrease in measurement sensitivity. In this study, degradation of SU-8, an epoxy-based negative photoresist and insulating material, patterned on Au interdigitated microelectrode (IDE) for long-term (>30 days) immersion in an electrolyte at 37 °C was investigated by electrical impedance spectroscopy and theoretical equivalent circuit modeling. From the experiment and simulation results, it was found that the degradation level of the insulating layer of the IDE electrode can be characterized by monitoring the resistance of the insulating layer among the circuit parameters of the designed equivalent circuit modeling.

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11

Brenek, A., V. Vaclavik, T. Dvorsky, and Vojtěch Šimíček. "Energy Remediation Combining Insulation Materials Based on Calcium Silicate and Expanded Polymers." Materials Science Forum 865 (August 2016): 196–200. http://dx.doi.org/10.4028/www.scientific.net/msf.865.196.

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Energy rehabilitation of buildings using airtight insulating materials based on expanded polystyrene is often accompanied by the formation of moisture problems in the enclosure wall footing. Moisture progress in the rehabilitated structure is simulated using modern moisture transient models in Delphin software. Combinations of the developed plate thermal insulating materials based on calcium silicate and the conventional thermal insulation panels based on expanded polymer have been designed to address the moisture problems. This article describes the function of this solution during the reconstruction of a house built from full clay bricks with malfunctioning waterproofing in the lower house construction.

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12

Lisitano, Ivana Mattea, Deborah Laggiard, Stefano Fantucci, Valentina Serra, and Elisa Fenoglio. "Evaluating the Impact of Indoor Insulation on Historic Buildings: A Multilevel Approach Involving Heat and Moisture Simulations." Applied Sciences 11, no. 17 (August 27, 2021): 7944. http://dx.doi.org/10.3390/app11177944.

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The energy refurbishment of historic buildings is a complex task for building envelope designers who need to carefully consider building conservation guidelines and principles. In most cases, external wall insulation techniques can determine an unacceptable alteration of the historical value of a building. For this reason, internal wall insulation techniques have been used widely in the last few decades. Nevertheless, dealing with internal wall insulation requires a complex design to avoid the risk of condensation and moisture-related pathologies. Moreover, an internal wall insulation may have a relevant impact on indoor comfort conditions. In this paper, the Monastery of Santa Maria de Monfero in Galicia (Spain) has been adopted as a building case study to compare different technological solutions based on: (i) an insulating plaster layer, (ii) dry counter wall systems. In the first step, heat and moisture transfer simulations of the wall components were performed to analyze the hygrothermal behavior of the different alternatives considering two different climate conditions. In a second step, a simulation of the whole building was performed to analyze the impact of the retrofitting strategies on the indoor climate and on the building heating and cooling demand. The obtained results show that the counter wall solution leads to higher energy savings during the heating season in the colder winter climate. However, the use of insulating thermal plaster could also be a viable solution since they lead to several advantages in summer because of their higher thermal inertia. Therefore, the selection of the most appropriate insulation technique has to be evaluated carefully considering the outdoor/indoor climate and using a case-by-case approach.

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13

Pešata, Michal, Lukáš Procházka, and Jana Boháčová. "Possibilities of Using Pumice Concrete as Thermal Insulation Lining of Industrial Chimneys." Solid State Phenomena 321 (July 26, 2021): 105–11. http://dx.doi.org/10.4028/www.scientific.net/ssp.321.105.

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This paper deals with the possibility of using pumice concrete as thermal insulation lining of industrial chimneys. Two formulas were prepared, the first from sulphate resistant cement and the second as a reference mixture from Cem I 42.5R. The thermal insulating properties of the prepared recipes will be evaluated as well as the resistance to the action of sulphates in 5 % sodium sulphate solution. No significant decrease in strength was observed when samples were stored in 5% sodium sulfate solution for 60 days. Only the reference series reported a significant unexpected decrease in strength.

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14

Tsuchie, Motoo, and Teruo Miyamoto. "Phenomenon of Solution on Copper in Insulating Oil." IEEJ Transactions on Fundamentals and Materials 113, no. 1 (1993): 39–42. http://dx.doi.org/10.1541/ieejfms1990.113.1_39.

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15

Spodyniuk, N., I. Sukholova, and O. Dovbush. "Thermally conductive cost of the heat-insulating materials." Energy and automation, no. 5(51) (October 28, 2020): 98–109. http://dx.doi.org/10.31548/energiya2020.05.098.

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The article presents the results of theoretical research to achieve the maximum effect in determination of the economically feasible level of buildings thermal protection. It must be optimal both thermally and economically, an indicator of which there are the costs. Graphical and analytical dependences are given. The research results substantiate the maximum effect when different thermal insulating materials are used. The aim is to increase the efficiency of energy saving measures, reduce their cost by optimizing the cost of thermal energy and insulating materials, determining the optimization criteria and justification for choice the optimal insulating material and its thickness, and determining the optimal thermal resistance, identifying ways to improve energy efficiency and substantiation of the calculation method. One of the most common thermal renovation measures, namely insulation of external walls, is considered. An economic assessment has been conducted, which is an important factor in a certain energy-saving proposition. The solution of the problem is presented, which includes two stages. The result of the first stage is the selection of the optimal heat-insulating material. The second stage is a substantiation of economically expedient thickness of the heat-insulating material. The obtained results make it possible to increase the efficiency of energy saving in thermal renovation of buildings taking into account both energy and economic aspects. In this paper the results of mathematical provement of such factor importance as the thermally conductive cost of the heat-insulating material at their thickness optimization are presented.

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16

Petrashev, Аlexandr, Larisa Knyazeva, Viktor Klepikov, Nicolay Kur'yato, and Andrey Dorokhov. "DURABILITY OF POLYURETHANE COATINGS IN CONCENTRATED SOLUTIONS OF MINERAL FERTILIZERS." SCIENCE IN THE CENTRAL RUSSIA, no. 6 (December 26, 2022): 129–40. http://dx.doi.org/10.35887/2305-2538-2022-6-129-140.

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Polyurethane Primer Coatings Polyurethol tested in these solutions for 14 months. Coatings Polyurethol containing a hardener retained good adhesion to St3 steel. Coatings Polyurethol without hardener lost adhesion in solutions of potassium chloride, borofoska, diammofoska and nitrophoska. The effect of a borofoska solution on the electrical conductivity (from 1 nA) and resistance (up to 10 GΩ) of Polyurethol and Raptor coatings was studied using the IKS-1 measuring kit. Coatings were applied by spraying and brushing, in one and several coats, with and without hardener. The electrical resistance of a two-layer coating of Polyurethol was 130 MΩ, a single-layer coating was 17 MΩ after a year of atmospheric testing. The electrical resistance of the Raptor coating in three layers with a thickness of 300 microns decreased from 130 to 22 MΩ after 200 days of testing in a solution of borofoska. The insulating power of 1 coat of Polyurethol when applied by spray is equal to the insulating power of 2 coats of Raptor when applied by brush. It has been established that polyurethane coatings Polyurethol and Raptor are suitable for anticorrosion protection of low-carbon steels from the action of mineral fertilizer solutions. The insulating power of 1 coat of Polyurethol when applied by spray is equal to the insulating power of 2 coats of Raptor when applied by brush. It was established that polyurethane coatings Polyurethol and Raptor are suitable for anticorrosion protection of low-carbon steels from the action of mineral fertilizer solutions.

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17

Bertorello, Anna Rita. "A Technological Analysis Applied to Existing Building Insulated with Straw." Key Engineering Materials 600 (March 2014): 719–26. http://dx.doi.org/10.4028/www.scientific.net/kem.600.719.

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The current building culture requires a more careful and sensitive attention to environmental problems and the necessity to reduce the building energy requirement using sustainable products and solutions (eg. re-use of agricultural by-products). This research concerns the study of insulating existing buildings with straw (internal and external insulation) realized in Europe and in New Mexico. The case studies are analyzed with a technological point of view through the dissection of the insulation build-up to understand the construction phases during its insulation. The analysis of each case regards three building parts: the upper enclosure, the vertical enclosure and the attachment between the vertical enclosure and the ground. The application of this working method allows the analysis and understanding of how different elements are connected to each other, the possible finishing solutions and the relationship between the straw insulation and the existing building. This research analyzes different examples in order to develop a possible improved solution through the critical analysis of different construction methods used in the buildings. It is possible to achieve a classification methods of straw insulation found in the study cases and analyze every single part in the insulation system.

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18

Zheng, Hanbo, Chuansheng Zhang, Yiyi Zhang, Jiefeng Liu, Enze Zhang, Zhen Shi, Guangqi Shao, Kuikui Shi, Jing Guo, and Chaohai Zhang. "Optimization of Ethanol Detection by Automatic Headspace Method for Cellulose Insulation Aging of Oil-immersed Transformers." Polymers 12, no. 7 (July 15, 2020): 1567. http://dx.doi.org/10.3390/polym12071567.

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The method using ethanol to evaluate the cellulose insulation aging condition of oil-immersed transformers has been proposed. At present, the dominating method for detecting ethanol in insulating oil is to use headspace–gas-chromatography–mass-spectrometry (HS-GC-MS). However, the problem of quantitative inaccuracy will be sometimes encountered in the actual detection process due to improper instrument parameter setting and improper manual operation. In this study, as an aging marker, ethanol in transformer insulating oil was separated by using VF-624 ms capillary column. The effects of gas-chromatography–mass-spectrometry (GC-MS) optimization conditions, headspace equilibrium temperature, headspace equilibrium time and standard solution preparation method on the determination of ethanol content in oil were discussed, and optimized measures were proposed. The experimental results showed that the measurement can be more accurate under the headspace temperature of 80 °C and the headspace time of 40 min, and relative standard deviation percentage (RSD%) could reach to 4.62% under this condition. It was also pointed out that, for the preparation of standard solution, the method which controlled the sampling volume of anhydrous ethanol by microliter syringe could make the peak area of ethanol chromatogram have a better linear relationship with the standard curve. Under the similar linear range, the goodness of fitting curve without diluting process could be as high as 0.9993, while the method of preparing the stock solution and diluting stepwise to obtain the fitting curve only had a goodness of 0.9910. The method was validated by standard addition recovery test, and the recovery values obtained were between 90.3% and 95.8%. The optimized method is of great significance for the measurement of ethanol dissolved in insulating oil.

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19

Voznyak, Orest, Yuriy Yurkevych, Iryna Sukholova, Oleksandr Dovbush, and Mariana Kasynets. "Thermally conductive cost of the heat-insulating materials." Theory and Building Practice 2020, no. 2 (November 20, 2020): 92–98. http://dx.doi.org/10.23939/jtbp2020.02.092.

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The article presents the results of theoretical research to achieve the maximum effect in determination of the economically feasible level of buildings thermal protection. It must be optimal both thermally and economically, an indicator of which there are the costs. Graphical and analytical dependences are given. The research results substantiate the maximum effect when different thermal insulating materials are used. The aim is to increase the efficiency of energy saving measures, reduce their cost by optimizing the cost of thermal energy and insulating materials, determining the optimization criteria and justification for choice the optimal insulating material and its thickness, and determining the optimal thermal resistance, identifying ways to improve energy efficiency and substantiation of the calculation method. One of the most common thermal renovation measures, namely insulation of external walls, is considered. An economic assessment has been conducted, which is an important factor in a certain energy-saving proposition. The solution of the problem is presented, which includes two stages. The result of the first stage is the selection of the optimal heat-insulating material. The second stage is a substantiation of economically expedient thickness of the heatinsulating material. The obtained results make it possible to increase the efficiency of energy saving in thermal renovation of buildings taking into account both energy and economic aspects. In this paper the results of mathematical provement of such factor importance as the thermally conductive cost of the heat-insulating material at their thickness optimization are presented. Determining for the establishment of the normative thermal resistance in the future is the ratio of the cost of thermal energy to the thermal conductivity of the insulating material.

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20

Asenjo, E. A., A. E. Valdenegro, and N. O. Morales. "Solution of low frequency complex fields in insulating systems." IEEE Transactions on Dielectrics and Electrical Insulation 11, no. 6 (December 2004): 1014–25. http://dx.doi.org/10.1109/tdei.2004.1387825.

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21

Ignaszak, Zenon, and Paweł Popielarski. "Problem of the Variability of Substitute Thermo-Physical Properties for Heat Transfer Modelling in Iso- and Iso-Exo Porous Materials." Defect and Diffusion Forum 283-286 (March 2009): 376–81. http://dx.doi.org/10.4028/www.scientific.net/ddf.283-286.376.

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In foundry technology the modeling of heat transfer in materials containing exothermic components must take into consideration the presence of heat sources in the Fourier–Kirchhoff equation. The aim of this investigation was the identification of real and effective thermophysical parameters of the insulating and insulating –exothermic materials used as riser sleeves containing these exothermic heat sources. The experiments of liquid steel or cast iron pouring into the mould, containing different insulating and exothermic sleeves were carried out, using thermocouples meas-urement systems (thermal analysis of casting–mould system). Then the thermo-physical coefficients of these materials were calculated using inverse problem solution. The numerical system Calcosoft and its Inverse Solution procedure were applied.

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22

Ibragimov, Alexander, Tatyana Vakhnina, and Irina Susoeva. "The improvement of composite plates’ indicators from cotton and flax spinning waste by modification of raw materials." MATEC Web of Conferences 239 (2018): 01009. http://dx.doi.org/10.1051/matecconf/201823901009.

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The article is devoted to solve the problem of modification of the non-returnable cotton and flax spinning waste in order to improve the physical and mechanical characteristics of composite heat-insulating plates based on these wastes. The modification of the vegetable filler with a 1% solution of sulfuric acid made it possible to increase the physical and mechanical indicators of plates. The thermal insulation properties of the composite plate material with some soft acid modification of the filler did not change significantly.

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23

Asdrubali, Francesco, Luca Evangelisti, Claudia Guattari, Marta Roncone, and Daniele Milone. "Experimental Analysis of the Thermal Performance of Wood Fiber Insulating Panels." Sustainability 15, no. 3 (January 19, 2023): 1963. http://dx.doi.org/10.3390/su15031963.

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During the last decades, attention to energy and environmental problems has significantly grown, along with the development of international and national policies addressing sustainability issues. In the construction sector, one of the most widespread energy efficiency strategies consists of thermal insulation of buildings thanks to external insulating panels. Among these, wood fiber is an insulating material characterized by a natural, eco-sustainable and biodegradable structure, coming from the recycling of waste wood from sawmills. The present study aimed to characterize small test building insulated with wood fiber panels from the thermal point of view, comparing the results with those of an identical, non-insulated reference test building. The experimental campaign highlighted several advantages and an excellent thermal performance provided by the eco-sustainable solution of wood fiber insulating panels: Lower values of the thermal transmittance (−57%), thus ensuring greater stability of the internal air temperature and better values in terms of attenuation (−60% in summer and −74 % in winter) and phase shift (+2 h in summer and +2.28 h in winter) compared to those obtained from the reference building. The material is also equipped with an Environmental Performance Declaration (EPD) that certifies its environmental benefits.

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24

Sumskoi, D. A. "Heat-insulating mortar based on composite binder." Proceedings of the Voronezh State University of Engineering Technologies 80, no. 2 (October 2, 2018): 283–89. http://dx.doi.org/10.20914/2310-1202-2018-2-283-289.

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The article presents the results of studies on obtaining a heat-insulating solution obtained by grinding. The binding compositions were synthesized at various ratios of cement and waste products of perlite sand in ajet mill under different grinding regimes. The features of grinding processes have been studied and technological and physicomechanical properties of the resulting binding compositions have been determined. The microstructure of cement stones obtained from activated Portland cement and binding compositions in ajet mill was studied by electron microscopy. It is established that open pores of cement-binding compositions prepared using perlitic fillers are filled with neoplasms and perlite grains have a plate-prismatic shape, which is clearly seen in micrographs. The microstructure of binding compositions has a dense structure due to a rationally selected composition, the use of an effective mineral filler, which creates additional substrates to form the internal microstructure of the composite. A comparative X-ray diffraction analysis of hydrated plain cement and binding composition was carried out and it was established that hydrated cement and binding composition are identical in mineral composition, having Ca hydroalumates, Ca (OH)2, CSH, and low amounts of ettringite. A distinctive feature of the diffractograms is the significant amorphization of the binding composition. The range of the optimal ratio of cement to perlite was found to be 1:9; 1:11; 1:13. A heat-insulating solution based on composite binder and expanded perlite aggregate (1:11) with a density of 1200 kg / m3 and a strength of 2.5 MPa was obtained. Modification of the solution by additives of superplasticizer; blowing agent; redispersible dispersion powder, it was possible to obtain a heat-insulating solution with a density of 973.11 kg/m3. Optimization of this solution with expanded polystyrene microspheres made it possible to obtain a density of the composite of 240-260 kg/m3 at a compressive strength of 1.05-1.15 MPa. The developed heat-insulating compounds have a reduced density and sufficient strength, which is the reason to recommend them for use in the manufacture of construction works.

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25

Shvets, V., and M. Maksimenko. "DEVELOPMENT OF THERMAL INSULATION TILE WITH NON-VENTILATED AIR LAYERS SHIELDED BY FOIL MATERIAL." Modern technology, materials and design in construction 29, no. 2 (2021): 45–50. http://dx.doi.org/10.31649/2311-1429-2020-2-45-50.

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A heat-insulating tile consisting of a back, side and front wall made of extruded expanded polystyrene and a polymer-sand mixture has been developed. Inside there are two unventilated air layers, separated by a heat-reflecting screen. In order to exclude cold bridges, the thermal insulation tile is made of two parts, offset in the horizontal direction. Fixing of tiles among themselves is carried out by means of occurrence of ledges on the top face of one tile with hollows on the bottom face of another. This type of joining plates ensures the absence of cold bridges and facilitates their installation. The problem is solved by the fact that in the facade thermal insulation panel containing the front, rear walls, side faces and locking elements in the form of protrusions and recesses arranged in a checkerboard pattern, and made with the possibility of mounting, the front and rear walls form a frame with a cavity , filled with insulating material, characterized in that the locking elements are placed on the front faces of the frame. Shielded layers of air are used as heat-insulating material. The frame of the panel is made of polymer-sand material, and for its fastening use an adhesive solution. This is achieved by making a panel of polymer-sand frame, in the middle of which there are shielded air layers, which provide resistance to heat transfer and infrared radiation of the material.

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26

Beaino, Samar, Peter El Hage, Rodolphe Sonnier, Sylvain Seif, and Roland El Hage. "Novel Foaming-Agent Free Insulating Geopolymer Based on Industrial Fly Ash and Rice Husk." Molecules 27, no. 2 (January 14, 2022): 531. http://dx.doi.org/10.3390/molecules27020531.

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This study highlights the synthesis of a new thermal insulating geopolymer based on the alkaline activation of fly ashes. A porous geopolymer material can be prepared without the addition of a foaming agent, using high ratio solution/ashes (activating solutions used are water, sodium or potassium hydroxide). In order to increase the porosity of the material and to make it more ecological, rice husks are incorporated into the formulation. The geopolymer materials were prepared at room temperature and dried at moderate temperature (105 °C) by a simple procedure. The microstructural characteristics of these new porous geopolymers were assessed by optical microscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and X-ray fluorescence (XRF). Infrared spectroscopy (FTIR) was used to confirm the geopolymerisation. The effect of the ratio solution/ashes and the percentage of the rice husk addition on thermal and mechanical analysis was evaluated. An insulating material for a solution/ashes ratio of 0.9 and a rice husk content of 15% having a λ value of 0.087 W/(m·K), a porosity of 61.4% and an Rc value of 0.1 MPa was successfully prepared.

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27

Hegyi, Andreea, Horațiu Vermeșan, Adrian-Victor Lăzărescu, Cristian Petcu, and Cezar Bulacu. "Thermal Insulation Mattresses Based on Textile Waste and Recycled Plastic Waste Fibres, Integrating Natural Fibres of Vegetable or Animal Origin." Materials 15, no. 4 (February 11, 2022): 1348. http://dx.doi.org/10.3390/ma15041348.

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The current context provides, worldwide, the need to identify solutions for the thermal efficiency of constructions, through sustainable and innovative methods and products. A viable solution is to produce thermal insulating products by carding-folding technology, using natural fibres and recycled polyethylene terephthalate (rPET) and polyester (rPES) waste, converted to fibres. This paper presents experimental results obtained after testing several thermal insulation composite products produced using a mix of sheep wool, cellulose, rPET and rPES fibres. The results of the research demonstrate the thermal insulation properties but, at the same time, identify the benefits of using such materials on the quality of the air in the interior space (the ability to adjust humidity and reduce the concentration of harmful substances). At the same time, the advantages of using sheep wool composite mattresses concerning their resistance to insect attack is demonstrated when compared with ordinary thermal insulation materials. Finally, sensitivity elements of these composites are observed in terms of sensitivity to mould, and to contact with water or soil, drawing future research directions in the development of this type of materials.

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Mikulica, Karel, and Rudolf Hela. "Hempcrete - Cement Composite with Natural Fibres." Advanced Materials Research 1124 (September 2015): 130–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1124.130.

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The paper describes use of hemp boon as a natural organic filler for building materials, especially concrete designed as heat - insulating filler material around the load-bearing structure of wooden buildings. In constructions, hemp has been used in the form of mats made of hemp fiber, with the addition of bonding bicomponent fibers and soda solution for protection against burning and rots. Mats are formed by pneumatic fleece, they are subsequently thermally treated and then cut to the desired dimensions. Calcium-hemp building material is a revolutionary construction and thermal insulating material which can be used for building the entire building, bricks or other insulation are not necessary. The trend is spreading across Europe from France, where the mixture of boon and lime was used in the 16thand 17thcenturies for the construction of timber-framed houses. Although there are hundreds of buildings made from hempcrete in Europe, its use in our country develops very slowly. Concrete is a mixture of hemp boon, lime hydrate, cement and water. It is a recyclable material that offers high thermal and sound insulation. The biggest advantage is undoubtedly the speed of construction, namely hemp concrete hardens very quickly.

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29

Selivanov, Oleg, Vladimir Chukhlanov, and Marina Ilina. "Development of energy-efficient heat-insulating foam." E3S Web of Conferences 138 (2019): 01012. http://dx.doi.org/10.1051/e3sconf/201913801012.

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The paper presents the research results dealing with the development of energy-efficient thermal insulation material based on the binder of 10 % polycarbosilane solution in xylene, filled with various hollow microspheres and fibrous filler from quartz fibers. According to the research results the best effect was demonstrated by the samples of thermal insulation material, containing hollow carbon microspheres as filler. When the binder contains 10% of polycarbosilane solution in xylene-15-70% wt., hollow carbon microspheres 12-65% wt. and quartz fibers 8-43% wt., the resulting foam possesses reduced density, low thermal conductivity and good strength characteristics. It allowed this material to be recommended for the use as energy-efficient heat-resistant insulation in various industries, including power and aircraft engineering.

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30

YANG, DONGMEI, CHANGHONG YANG, CHUNXUE YUAN, XIN YIN, and JIANRU HAN. "PREPARATION AND CHARACTERISTICS OF Sm-DOPED Bi2Ti2O7 THIN FILMS." Surface Review and Letters 14, no. 01 (February 2007): 147–50. http://dx.doi.org/10.1142/s0218625x07009165.

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Crack-free Sm-doped Bi 2 Ti 2 O 7( Sm : Bi 2 Ti 2 O 7) thin films with a strong (111) orientation have been prepared on p-Si (111) by chemical solution deposition (CSD). The structural properties and crystallizations were studied by X-ray diffraction. The surface morphology and quality were examined using atomic force microscopy (AFM). The dielectric constant and loss factor at different frequencies were also evaluated at room temperature. Their insulation was studied, too. The films exhibit better insulating property than does the pure Bi 2 Ti 2 O 7.

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31

Sahmenko, Genadijs, Maris Sinka, Eva Namsone, Aleksandrs Korjakins, and Diana Bajare. "Sustainable Wall Solutions Using Foam Concrete and Hemp Composites." Environmental and Climate Technologies 25, no. 1 (January 1, 2021): 917–30. http://dx.doi.org/10.2478/rtuect-2021-0069.

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Abstract This work is devoted to developing an energy-efficient solution for the external wall and evaluating its environmental impact. Several types of innovative single-layer and sandwich-type wall solutions were analysed and compared. Different constructive and thermal insulation materials were used, including traditional wall materials such as AAC (autoclaved aerated concrete) and normal concrete. Advanced materials, such as high-performance foamed concrete (HPFC) and natural biofibre composites, have been evaluated as an alternative solution. Ultra-light foam concrete was applied as an alternative for polymer-based insulation. The next development was sandwich three-layer wall constructions consisting of foam concrete and natural biofibre composites. A prototype of a wall panel was elaborated with outer layers of high-density bio-composite and a middle layer of high porosity hemp composite. Basic properties of sandwich blocks, such as density and thermal conductivity, were evaluated and compared. The environmental impact of the studied wall systems was analysed using a life-cycle assessment (LCA) to assess carbon dioxide emissions during the production phase of the material. The results show that replacing traditional insulation with bio-based materials has greatly reduced the negative environmental impact of the wall elements. A combination of natural fibre bio-composite and mineral insulating foam makes it possible to obtain an eco-friendly and sustainable sandwich-type wall system.

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32

ROZENBERG, MARCELO J., GOETZ MOELLER, and GABRIEL KOTLIAR. "THE METAL–INSULATOR TRANSITION IN THE HUBBARD MODEL AT ZERO TEMPERATURE II." Modern Physics Letters B 08, no. 08n09 (April 20, 1994): 535–43. http://dx.doi.org/10.1142/s0217984994000571.

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We study the metal-to-insulator transition of the Hubbard model at zero temperatures in infinite dimensions. The coexistence of metallic and insulating solutions for a finite range of the interaction is established. It is shown that the metallic solution is lower in energy for any interaction in the coexistence region and that the transition is of second order.

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33

Kłosak, Andrzej, Alicja Kowalska-Koczwara, Filip Pachla, Krzysztof Stypuła, Tadeusz Tatara, and Bogusław Zając. "Proposal of new vibro-acoustic floor." MATEC Web of Conferences 211 (2018): 10001. http://dx.doi.org/10.1051/matecconf/201821110001.

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Human perception of vibration could be the basic parameter in designing a new buildings located close to public transport. It is also one of parameter that is considered in diagnosis of building vibration. People perceived vibrations through the floor. The problem of floor vibration appear especially in old historical buildings with wooden floor when source of transport vibration change because of infrastructure development. During years road, tramway or railway infrastructure is more expanded that it was when the old buildings were built. That is why new solutions of protection against noise and vibration are needed. One of that kind solution could be vibro-acoustic floor which can reduce impact sounds and vibrations. A flooring system that insulates both acoustically and vibrantly is a common solution to reduce noise coming from impact sounds or to propagate from lower levels to higher ones and to limit the influence of vibration on people receiving vibration in buildings passively. The flooring system should therefore be capable to damp vibrations up to 100 Hz and have sound insulation of min. 25 dB. The composition of vibration insulation materials and their material parameters will be selected to optimize the acoustic and vibration protection. At the same time, the acoustic and vibration-insulating flooring system should have all the functional features that are common to the floor: ease of installation and adequate rigidity. In paper three types of vibro-acoustic floors will be considered: with full vibro-insulation, with insulation strips and with point insulation. Advantages and disadvantages of these three considered solutions will be presented. The paper is pilot study to in-situ measurement which will be held under the project of EU commission support.

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34

Govor, Gennady A., Artem O. Larin, and Valery M. Dobriansky. "Investigation of the properties of soft magnetic composite materials in the frequency range of harmonic oscillations up to 100 kHz." Journal of the Belarusian State University. Physics, no. 1 (January 31, 2020): 60–66. http://dx.doi.org/10.33581/2520-2243-2020-1-60-66.

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The dynamic properties of the soft magnetic composite material in the frequency range up to 100 kHz with a change in the thickness of the insulating layer and the size of iron particles were investigated. It is shown that with an increase in the thickness of the insulating layer, the loss for remagnetization decreases, but at the same time there is a decrease in the magnetic value of the saturation induction and magnetic permeability. Therefore, that the decision to reduce losses by increasing the thickness of the insulating coating is not always the best solution. It is preferable to achieve a reduction losses for remagnetization due to an increase in the specific resistance of the insulating layer with its minimum thickness.

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35

Qiu, Jian, Jean Ran Gao, Mon Lin Kuo, and Jian Li. "Study of Puffing Cell Walls." Advanced Materials Research 113-116 (June 2010): 239–42. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.239.

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Since wood is porous it also is a good heat and sound insulating material. Puffing the cell wall may lose certain level of mechanical properties but would increase its insulation properties. In this study, Trema orientalis wood was first treated with nitric acid aqueous solution to damage the S3 layer of cell walls, followed by puffing the cell wall inward with saturated urea and ZnCl2 solutions. Results indicated that treating Trema orientalis with 10% nitric acid at 100 oC for 20 minute damaged the S3 layer of cell walls, and the subsequent treatment with urea and ZnCl2 saturated solutions caused the fiber tracheid walls to swell up to 76%. Then, the swollen material was dried with critical CO2 fluid to obtain puffed wood. SEM examinations of nitric acid-treated samples showed that lignin were removed from the S3 layer surfaces and S3 mirofibrils were ruptured causing the entire secondary walls to swell inward.

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36

Korolkov, Vladimir V., Simon A. Svatek, Stephanie Allen, Clive J. Roberts, Saul J. B. Tendler, Takashi Taniguchi, Kenji Watanabe, Neil R. Champness, and Peter H. Beton. "Bimolecular porous supramolecular networks deposited from solution on layered materials: graphite, boron nitride and molybdenum disulphide." Chem. Commun. 50, no. 64 (2014): 8882–85. http://dx.doi.org/10.1039/c4cc03720k.

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37

Lim, Kyung-Geun, Mi-Ri Choi, Ho-Beom Kim, Jong Hyeok Park, and Tae-Woo Lee. "High-efficiency polymer photovoltaic cells using a solution-processable insulating interfacial nanolayer: the role of the insulating nanolayer." Journal of Materials Chemistry 22, no. 48 (2012): 25148. http://dx.doi.org/10.1039/c2jm35016e.

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38

Menconi, Maria E., David Grohmann, and Piero Borghi. "Dynamic thermal simulation on retrofitting scenarios for semi-extensive sheep farms." Journal of Agricultural Engineering 45, no. 2 (October 2, 2014): 80. http://dx.doi.org/10.4081/jae.2014.235.

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Sheep and goat have a high adaptability to different climatic conditions. Nevertheless, even in extensive farming, these species benefit from the presence of structures that can mitigate stress from heat, cold and humidity changes. These shelters are used at night or for limited periods during the year. These are characterised by a low engineering and make extensive use of recycled material. Interesting innovation in rural areas could be represented by the re-development of these buildings in order to improve their internal microclimate. This work develops a thermal dynamic simulation model aimed at identifying the best solution to retrofit the envelope of existing livestock buildings. In this paper, three different solutions have been tested: insulation of vertical surfaces, insulation of roof and window type. Eight different materials have been considered for roof and vertical surfaces and four for the different kind of window glazing, analysing the building microclimate responses. As a reference building to compare the different solutions adopted has been chosen an extensive sheep farm located in the Italian Apennines. The results suggest that the best solution is to insulate the roof. The other elements offer negligible results in term of improving the internal microclimate conditions. For coating the roof it can also be considered a good response of all the analysed insulating materials, in order to increase the period of maintaining the temperature of comfort and not exceeding its critical values within the building.

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39

Wang, Juanhong, Chen Song, Zhiming Zhong, Zhanhao Hu, Shaohu Han, Wei Xu, Junbiao Peng, Lei Ying, Jian Wang, and Yong Cao. "In situ patterning of microgrooves via inkjet etching for a solution-processed OLED display." Journal of Materials Chemistry C 5, no. 20 (2017): 5005–9. http://dx.doi.org/10.1039/c7tc01330b.

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40

de Oliveira, T. V. A. G., A. Eleta, L. E. Hueso, and A. M. Bittner. "Mixed self-assembled monolayer gate dielectrics for low-voltage solution-processed polymer field-effect transistors." Journal of Materials Chemistry C 3, no. 6 (2015): 1181–86. http://dx.doi.org/10.1039/c4tc02206h.

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41

PING, WANG, ZHOU LIGUO, HAN JING, and GUO YONGCHUN. "EFFECTS OF YTTRIUM NITRATE ON MICROSTRUCTURE AND HIGH TEMPERATURE RESISTANCE OF ZrO2–Y2O3 CERAMIC COATINGS PREPARED BY A MODIFIED PEO PROCESS ON AN Al–12Si ALLOY." Surface Review and Letters 24, Supp02 (November 2017): 1850026. http://dx.doi.org/10.1142/s0218625x18500269.

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A ZrO2–Al2O3 ceramic coating and YSZ–Al2O3 coating were prepared on ZAlSil2Cu3Ni2 alloys by a modified plasma electrolytic oxidation (PEO) in zirconium salt solution. The microstructure, heat-insulating and high temperature oxidation properties were investigated by SEM, XRD and a fabricated heat insulation temperature testing device. The results showed that the surface of the YSZ–Al2O3 coating was composed of fine particles and had lower roughness. Yttrium partially stabilized the zirconia solid solution (Y[Formula: see text]Zr[Formula: see text]O[Formula: see text] which was formed in zirconium yttrium salt solution with a higher reaction temperature. The growth rate of the YSZ–Al2O3 coating was greater than the ZrO2–Al2O3 coating. Especially, the outward growth obviously improves. Furthermore, the heat insulation property of the coating enhances. The curves of the weight gains in the sample with YSZ–Al2O3 coating showed a logarithmic shape under the high temperature oxidation treatment of 400[Formula: see text]C. The weight gains of the sample with YSZ–Al2O3 coating were relatively lower than that of the as-coated sample. The ceramic layer had good high temperature stability.

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42

Gschwend, Grégoire C., and Hubert H. Girault. "Discrete Helmholtz model: a single layer of correlated counter-ions. Metal oxides and silica interfaces, ion-exchange and biological membranes." Chemical Science 11, no. 38 (2020): 10304–12. http://dx.doi.org/10.1039/d0sc03748f.

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43

Lu, Jacqueline, Valentina Marincioni, Scott Allan Orr, and Hector Altamirano-Medina. "Climate Resilience of Internally-Insulated Historic Masonry Assemblies: Comparison of Moisture Risk under Current and Future Climate Scenarios." Minerals 11, no. 3 (March 6, 2021): 271. http://dx.doi.org/10.3390/min11030271.

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The conservation of cultural heritage built of historical brick masonry alongside meeting targets in energy reduction will most likely require widespread installation of internal wall insulation (IWI). In London, traditional buildings (pre-1919) make up 40% of the existing stock and insulating from the interior is a likely retrofit solution for solid brick walls. Adding insulation may introduce a higher risk to moisture accumulation and consequences such as mould growth and material decay. To investigate resilience to future moisture loads, three interior insulation assemblies (conforming to two U-value guidelines) were simulated in DELPHIN under reference, near-future (2040), and far-future climate (2080) scenarios. Calcium silicate, phenolic foam, and wood fibre assemblies were simulated. The reference year climate file was compiled from observed data and future files developed using the UK Climate Projections 2018 (UKCP18). Assemblies were evaluated for moisture accumulation, mould growth risk, and freeze-thaw (FT) risk. Results show low-to-medium risks in 2040 and high risks in 2080, assemblies of higher absorptivity and thinner insulation comparatively performing best. The calcium silicate assembly fared best for moisture performance; however, all assemblies will be subject to high moisture risk levels in the far future and responsible retrofits must take this and alternative design solutions into account.

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44

Zheng, Jiang-Yi, Hai-Yan Liu, Xiang Wang, Yang Zhao, Wei-Wei Huang, Gao-Feng Zheng, and Dao-Heng Sun. "Electrohydrodynamic Direct-Write Orderly Micro/Nanofibrous Structure on Flexible Insulating Substrate." Journal of Nanomaterials 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/708186.

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AC pulse-modulated electrohydrodynamic direct-writing (EDW) was utilized to direct-write orderly micro/nanofibrous structure on the flexible insulating polyethylene terephthalate (PET) substrate. During the EDW process, AC electrical field induced charges to reciprocate along the jet and decreased the charge repulsive force that applied on charged jet. Thanks to the smaller charge repulsive force, stable straight jet can be built up to direct-write orderly micro/nanofibrous structures on the insulating substrate. The minimum motion velocity required to direct-write straight line fibrous structure on insulating PET substrate was 700 mm/s. Moreover, the influences of AC voltage amplitude, frequency, and duty cycle ratio on the line width of fibrous structures were investigated. This work proposes a novel solution to overcome the inherent charge repulsion emerging on the insulating substrate, and promotes the application of EDW technology on the flexible electronics.

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45

Matsukawa, Kimihiro, Mitsuru Watanabe, Takashi Hamada, Takashi Nagase, and Hiroyoshi Naito. "Polysilsesquioxanes for Gate-Insulating Materials of Organic Thin-Film Transistors." International Journal of Polymer Science 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/852063.

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Printable organic thin-film transistor (O-TFT) is one of the most recognized technical issues nowadays. Our recent progress on the formation of organic-inorganic hybrid thin films consists of polymethylsilsesquioxane (PMSQ), and its applications for the gate-insulating layer of O-TFTs are introduced in this paper. PMSQ synthesized in toluene solution with formic acid catalyst exhibited the electric resistivity of higher than 1014 Ω cm after thermal treatment at 150°C, and the very low concentration of residual silanol groups in PMSQ was confirmed. The PMSQ film contains no mobile ionic impurities, and this is also important property for the practical use for the gate-insulating materials. In the case of top-contact type TFT using poly(3-hexylthiophene) (P3HT) with PMSQ gate-insulating layer, the device properties were comparable with the TFTs having thermally grown SiO2gate-insulating layer. The feasibility of PMSQ as a gate-insulating material for O-TFTs, which was fabricated on a flexible plastic substrate, has been demonstrated. Moreover, by the modification of PMSQ, further functionalities, such as surface hydrophobicity, high permittivity that allows low driving voltage, and photocurability that allows photolithography, could be appended to the PMSQ gate-insulating layers.

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46

Bohórquez, Oscar, and A. M. S. Macêdo. "Heat Transport and Majorana Fermions in a Superconducting Dot-Wire System: An Exact Solution." Advances in Mathematical Physics 2018 (December 2, 2018): 1–11. http://dx.doi.org/10.1155/2018/4016394.

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We obtain exact expressions for the first three moments of the heat conductance of a quantum chain that crosses over from a superconducting quantum dot to a superconducting disordered quantum wire. Our analytic solution provides exact detailed descriptions of all crossovers that can be observed in the system as a function of its length, which include ballistic-metallic and metallic-insulating crossovers. The two Bogoliubov-de Gennes (BdG) symmetry classes with time-reversal symmetry are accounted for. The striking effect of total suppression of the insulating regime in systems with broken spin-rotation invariance is observed at large length scales. For a single channel system, this anomalous effect can be interpreted as a signature of the presence of the elusive Majorana fermion in a condensed matter system.

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47

Zach, Jiri, Azra Korjenic, and Jitka Hroudová. "Study of Behaviour of Advanced Silicate Materials for Thermal and Moisture Rehabilitation of Buildings." Advanced Materials Research 649 (January 2013): 167–70. http://dx.doi.org/10.4028/www.scientific.net/amr.649.167.

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The article describes the results of research work carried out in cooperation between the Faculty of Civil Engineering in Brno and the Faculty of Civil Engineering in Vienna concerning the development and study of the behaviour of heat-insulation plasters on a silicate basis, in particular in the area of the transfer of heat and moisture in their structures. The main objective was to determine the capillary activity of the thermal moisture behaviour of the developed materials which can be source material for the further part of the research solution addressing the simulation of the behaviour of these thermal-insulating plasters in real constructions.

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48

Kuznetsova, O. V., N. D. Yatsenko, A. I. Subbotin, and M. Yu Klimenko. "Resource-Saving Technologies in the Thermal Insulation-Structural Foam Glass Production." Materials Science Forum 974 (December 2019): 356–61. http://dx.doi.org/10.4028/www.scientific.net/msf.974.356.

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The modern building materials market places high demands on heat-insulating and heat-insulating structural materials. In this connection, the issues of developing high-quality building materials obtained on the resource-saving technologies basis allowing to solve two interrelated problems are topical. The first problem is the industrial waste generated and existing stocks disposal. The second is associated with a decrease in the traditional raw materials deficit [1]. These problems solution, combining rational technological solutions, is based on the scientific research achievements in this area, in particular in the foam glass production. The priority scientific research areas in the foam glass materials production are the developments related to the study, the new raw materials use and the production of foam glass mixture compositions on their basis, which provide, along with the necessary performance properties, high environmental safety requirements [2, 3].

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49

Zhang, Yun, Jing Qian, and Feng Chen. "Preparation of Biodegradable Phase-Change Refrigerant Used in Insulating Packaging." Applied Mechanics and Materials 200 (October 2012): 437–41. http://dx.doi.org/10.4028/www.scientific.net/amm.200.437.

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The starch grafted acrylic super absorbent resin was used as a basic material of refrigerant in insulating packaging. The influence of the amount of initiator on water absorption ability of starch grafted acrylic super absorbent resin was investigated. When the amount of initiator is 4 percent of the starch, the resin's water absorption that is 230g/g displays the best. By adding NaCl solution, the phase change temperature of refrigerant can be conditioned. The experimental results show that the phase change temperature and the latent heat of refrigerant decrease as the NaCl solution concentration increases. The starch grafted acrylic super absorbent resin and the NaCl solution with the concentration of 0~5 percent as refrigerant can be used to transport the products whose required temperatures is between -4 and 0°C. The starch grafted acrylic super absorbent resin can replace the ordinary high polymer materials, playing the role of being easily biodegradable and friendly to environment.

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50

Gao, Feng, Jianghua Wu, Yilin Zhao, Tinglu Song, Zhengtao Deng, Peng Wang, Yonggang Wang, and Hongbo Li. "A general approach to realizing perovskite nanocrystals with insulating metal sulfate shells." Nanoscale 13, no. 23 (2021): 10329–34. http://dx.doi.org/10.1039/d1nr01671g.

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Perovskite nanocrystals with an insulating metal sulfate shell are synthesized. These novel core/shell structured nanocrystals show highly reduced energy transfer in film and suppressed halide exchange in solution.

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