Bibliographies thématiques / Physical foaming

Littérature scientifique sur le sujet « Physical foaming »

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Publié le 4 mai 2024

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Articles de revues sur le sujet "Physical foaming"

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Ogawa, Yuji, Didier Huin, Henri Gaye et Naoki Tokumitsu. « Physical Model of Slag Foaming. » ISIJ International 33, no 1 (1993) : 224–32. http://dx.doi.org/10.2355/isijinternational.33.224.

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Li, Qi Jin, Guo Zhong Li et Cong Cong Jiang. « Study on the Properties of Physical and Chemical Foaming Concrete ». Advanced Materials Research 549 (juillet 2012) : 741–44. http://dx.doi.org/10.4028/www.scientific.net/amr.549.741.

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Foam concrete samples with different density were prepared by physical and chemical foaming method respectively, and the demoulding time, 24h water absorption, mechanical properties and internal bubble holes structure of physical and chemical foaming samples were determined and compared. The result showed that the lowest dry density of physical foaming samples could only reach about 280 kg/m3, or there would be bubble collapse phenomenon after samples moulded; When samples dry density were about the same, compared with chemical foaming samples, physical foaming samples had longer demoulding time, significantly lower 24h water absorption, higher 3 days compressive and flexural strength and much better internal bubble holes structure.
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Ghag, Surinder S., Peter C. Hayes et Hae-Geon Lee. « Physical Model Studies on Slag Foaming. » ISIJ International 38, no 11 (1998) : 1201–7. http://dx.doi.org/10.2355/isijinternational.38.1201.

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Попов, Александр, Aleksandr Popov, В. В. Нелюбова, Viktoriya Nelyubova, Д. Нецвет et Dar'ya Necvet. « THE INFLUENCE OF THE FOAMING AGENTS NATURE ON PHYSICAL AND TECHNICAL PROPERTIES OF FOAM ». Bulletin of Belgorod State Technological University named after. V. G. Shukhov 3, no 3 (25 mars 2018) : 5–12. http://dx.doi.org/10.12737/article_5abfc9b7ce94e3.70688983.

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The paper considers the influence of the nature of foaming agent on the properties of foams. Based on the analysis of the market of modern pore-forming additives, from the number of foaming agents the most widely used components, as well as novelties of the market, have been chosen. The technical characteristics of the foaming agents provided on the market are reviewed. The influence of foaming agent concentration, composition and base on the foam expansion, stability and density of foams is studied in the paper. The optimum ("working") concentrations of foaming additives are determined taking into account their stability. The stability of foams formed on the basis of working solutions in porous systems of various compositions is studied. Based on the complex of studies, the protein foaming agents are ranked according to the degree of their effectiveness, according to the data on the physical and technical properties of foams obtained on their basis.
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Llewelyn, Rees, Griffiths et Jacobi. « A Novel Hybrid Foaming Method for Low-Pressure Microcellular Foam Production of Unfilled and Talc-Filled Copolymer Polypropylenes ». Polymers 11, no 11 (17 novembre 2019) : 1896. http://dx.doi.org/10.3390/polym11111896.

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Unfilled and talc-filled Copolymer Polypropylene (PP) samples were produced through low-pressure foam-injection molding (FIM). The foaming stage of the process has been facilitated through a chemical blowing agent (C6H7NaO7 and CaCO3 mixture), a physical blowing agent (supercritical N2) and a novel hybrid foaming (combination of said chemical and physical foaming agents). Three weight-saving levels were produced with the varying foaming methods and compared to conventional injection molding. The unfilled PP foams produced through chemical blowing agent exhibited the strongest mechanical characteristics due to larger skin wall thicknesses, while the weakest were that of the talc-filled PP through the hybrid foaming technique. However, the hybrid foaming produced superior microcellular foams for both PPs due to calcium carbonate (CaCO3) enhancing the nucleation phase.
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Xalikovna, Musaeva Rano, Uvayzov Said Komilovich, Musaeva Nigina Xamidovna, Qo’ldosheva Feruza Salimovna et Akramov Doston Rustam Ugli. « RESEARCH AND EXPERIMENTAL DETERMINATION OF THERMO PHYSICAL PROPERTIESOF HIGHLY FOAMING SOLUTION ». International Journal of Psychosocial Rehabilitation 24, no 04 (28 février 2020) : 1918–28. http://dx.doi.org/10.37200/ijpr/v24i4/pr201300.

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Liu, Fu-Min, et An-Lin Wang. « Numerical Investigation on Physical Foaming and Decay Process Using Multicomponent Thermal Lattice Boltzmann Model ». MATEC Web of Conferences 237 (2018) : 02003. http://dx.doi.org/10.1051/matecconf/201823702003.

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Foam materials produced by physical process are common in the field of material engineering such as foamed asphalt. Considering heat and phase transfer, the complicated nonlinear phenomenon of foaming and decay process is difficult to be described numerically. In this paper, a multicomponent thermal lattice Boltzmann model for simulation of physical foaming and decay process is proposed. The model combines a thermal single-component phase change model with a multicomponent model, and the two models are verified separately. The physical foaming and decay process is solved numerically based on the proposed model. Simulation results show the influence of the distribution and content of the phase-change component on the expansion rate and decay time during physical foaming and decay process.
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Zhang, Guangchun, Yuanliang Wang, Haiping Xing, Jian Qiu, Jiang Gong, Kun Yao, Haiying Tan, Zhiwei Jiang et Tao Tang. « Interplay between the composition of LLDPE/PS blends and their compatibilization with polyethylene-graft-polystyrene in the foaming behaviour ». RSC Advances 5, no 34 (2015) : 27181–89. http://dx.doi.org/10.1039/c4ra16084c.

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The influences of PE-g-PS compatibilization on the foaming behaviour of LLDPE/PS blends in batch foaming using scCO2 as physical foaming agent depend strongly on the composition of the blends.
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Zhai, Chenxi, Yang Yu, Yumei Zhu, Jing Zhang, Ying Zhong, Jingjie Yeo et Mingchao Wang. « The Impact of Foaming Effect on the Physical and Mechanical Properties of Foam Glasses with Molecular-Level Insights ». Molecules 27, no 3 (27 janvier 2022) : 876. http://dx.doi.org/10.3390/molecules27030876.

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Foaming effect strongly impacts the physical and mechanical properties of foam glass materials, but an understanding of its mechanism especially at the molecular level is still limited. In this study, the foaming effects of dextrin, a mixture of dextrin and carbon, and different carbon allotropes are investigated with respect to surface morphology as well as physical and mechanical properties, in which 1 wt.% carbon black is identified as an optimal choice for a well-balanced material property. More importantly, the different foaming effects are elucidated by all-atomistic molecular dynamics simulations with molecular-level insights into the structure–property relationships. The results show that smaller pores and more uniform pore structure benefit the mechanical properties of the foam glass samples. The foam glass samples show excellent chemical and thermal stability with 1 wt.% carbon as the foaming agent. Furthermore, the foaming effects of CaSO4 and Na2HPO4 are investigated, which both create more uniform pore structures. This work may inspire more systematic approaches to control foaming effect for customized engineering needs by establishing molecular-level structure–property–process relationships, thereby, leading to efficient production of foam glass materials with desired foaming effects.
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Sun, Qiang, Guan Bao Huang, Jun Hui Ji et Chang An Zhang. « Preparation of Poly(Butylene succinate)(PBS) Foaming Materials ». Advanced Materials Research 287-290 (juillet 2011) : 1805–10. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1805.

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Poly(butylene succinate)(PBS) is a kind of biodegradable materials. In this paper PBS foaming materials is prepared by physical foaming method of one-step compression molding. The influences of blowing agent and nucleating agent, the foaming temperature and foaming time on the cellular morphology of PBS foaming materials have been studied. The results showed that when the foaming temperature was 160°C，the blowing agent content was 5 parts, the foaming pressure was higher than 10 MPa, and the foaming time was 20 minutes with nucleating agent addition, the cellular morphology and mechanical properties of the foaming materials were better. The results showed that the foaming technology influenced greatly on the properties of foam of PBS materials. The expansion ratio had a small drop when the temperature increased. The addition of nucleator talc and foaming aids urea increased first then decreased the expansion ratio of the PBS foaming materials.
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Thèses sur le sujet "Physical foaming"

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Gong, Pengjian. « PHYSICAL FOAMING BEHAVIOR AT THE INTERFACE OF POLYMER BLENDS-Foaming Mechanism and its Application- ». 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/180507.

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Purcell, Matthew S. « Supercritical fluid foaming : a novel route to polymeric allografts ? » Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14198/.

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There is a growing need for synthetic bone graft materials, which is particularly apparent for procedures requiring impaction bone grafting (IBG), such as revision hip arthroplasty. Currently allograft bone is used that has limited supply and associated risks of transmission of infectious agents. Porous bioresorbable polymeric scaffolds can be created using supercritical carbon dioxide (scCO2). This thesis investigated the use of these scaffolds for impaction bone grafting procedures. Building on previous research within the literature poly(D,L-lactide) (PDLLA) and poly(D,L-lactide-co-glycolide) (PDLLGA) scaffolds of high molecular weight (100 kDa) were investigated for this use. Scaffolds were milled using a standard bone mill and impacted to create porous milled chips of bioresorbable scaffolds and impacted for mechanical shear testing and biocompatibilities. The impaction process used forces equivalent to those experienced during IBG. In vitro cell experiments were used to assess the proliferation and osteoblastic differentiation of mesenchymal stem cells (MSCs) on impacted scaffolds to identify the most promising scaffold compositions. These compositions included pure polymer and polymer:HA microparticle composites. Further experiments using animals (murine and ovine) were then used to investigate the in vivo performance of the scaffolds. A critical sized ovine femoral condyle defect established the osteoinductive and osteoconductive potentials of milled scCO2 foamed PDLLA + 10 wt.% hydroxyapatite (HA) microparticle scaffolds in vivo. The scale-up potential of scCO2 foaming of bioresorbable scaffolds was established using a 1 L vessel. Scaffolds scCO2 foamed using either a 60 ml autoclave or a 1 L vessel were characterised using scanning electron microscopy and micro computed tomography. Scaffolds from different batches were characterised and compared to ensure process repeatability was accounted for. The final chapter investigated differences in the osteoblastic differentiation of MSCs on PDLLA and PDLLGA scaffolds observed in experiments at the start of the study. Spincoated and dipcoated flat films of PDLLA, PDLLGA, and PDLLA:PDLLGA (50:50) were used for in vitro cell culture to remove the effect of morphological differences that affected scCO2 foamed scaffold experiments. Additionally, this chapter investigated the effect of the form of HA using HA nanoparticles andHA microparticles in scCO2 foamed PDLLA:HA composites for in vitro studies.
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Sharudin, Rahida Wati Binti. « Carbon Dioxide Physical Foaming of Polymer Blends:-Blend Morphology and Cellular Structure- ». 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/161019.

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Phianmongkhol, Aphirak. « Characterisation of protein foams using a method based on conductivity measurement and measurement of physical properties of protein solutions relevant to foaming behaviour ». Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326975.

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Jiraporn, Sirison. « Studies on functional properties of soy lipophilic protein and its potential for food applications ». Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263363.

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Rainglet, Benoit. « Etude du moussage par CO2 de polypropylène et de TPV en autoclave et par extrusion : formulation, rhéologie et modélisation ». Electronic Thesis or Diss., Lyon, 2021. http://www.theses.fr/2021LYSES029.

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Travaux portant sur le moussage physique par adjonction de CO2 supercritique de polyoléfines et thermoplastiques vulcanisés (TPV) que ce soit par procédé continu (extrusion) ou par procédé discontinu (réacteur).Grâce à la formulation, l’étude rhéologique et le moussage de polymères existants et inédits un critère rhéologique permettant de définir la capacité à mousser a été démontré et étendu au mélange complexe de polymère (TPV). Plus spécifiquement l’étude de la formulation des TPV sur le moussage a été investigué et des conclusions concernant la chimie de réticulation ainsi que l’ajout de charges ont pu être déterminées.La modélisation numérique et la mise en œuvre de l’extrusion moussage ont été réalisées et ont permis de démontrer la possibilité d’obtenir une mousse régulière et homogène ainsi que de prédire, en fonction des paramètres d’entrés, les caractéristiques finales de la mousse
Work on the physical foaming of vulcanised polyolefins and thermoplastics (TPV) by the addition of supercritical CO2, whether by continuous process (extrusion) or by batch process (reactor).Through the formulation, rheological study and foaming of existing and new polymers, a rheological criterion for defining the ability to foam was demonstrated and extended to complex polymer blends (as TPV). More specifically, the study of TPV formulation on foaming was investigated .Conclusions regarding cross-linking chemistry and addition of fillers were determined.Numerical modelling and implementation of extrusion foaming were carried out and demonstrated the possibility of obtaining a regular and homogeneous foam as well as predicting, depending on the input parameters, the final characteristics of the foam
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Ercoli, Roberto. « Chemical neutralization of industrial by-products from the secondary aluminum industry : re-use as foaming agents for the synthesis of geopolymers and monitoring of the hydrogen-rich gas production ». Doctoral thesis, Urbino, 2022. http://hdl.handle.net/11576/2698511.

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Albertsson, Galina. « Effect of the presence of a dispersed phase (solid particles, gas bubbles) on the viscosity of slag ». Thesis, KTH, Mikro-modellering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133495.

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The viscosities of a set of silicone oils containing different size ranges of charcoal or paraffin particles as well as the viscosities of silicone oil foams were measured at room temperature in order to determine the effect of dispersed phase on the viscosity of a liquid and its effect on foaming ability. The effective viscosity of the samples increased with volume fraction of the second phase. The foaming ability was improved by the presence of the particles. The improved foaming effect was for the most part not a result of the increased viscosity. No connection between the particle size and the effective viscosity could be determined. On the other hand particle morphology and the particle size distribution had effect on the effective viscosity. The viscosity data were compared with a number of existing equations for the estimation of effective viscosity. Einstein-Roscoe equation is suitable for two-phase mixtures containing globular particles with narrow particle size distribution and low interfacial tension. New mathematical models are required for effective viscosity prediction, where the suspending phase viscosity, effect of the interfacial tension, as well as the particle morphology should be taken in consideration.
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Alhasan, Ahmad Abdulraheem. « Low Temperature Characterization of Foamed Warm Mix Asphalt ». University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1374676401.

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CHANG, CHIH-CHE, et 張誌哲. « Effect of Nucleating Agent on EVA Foaming Material under Supercritical Fluid Physical Foaming ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ew7pz3.

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碩士
逢甲大學
纖維與複合材料學系
105
In this study, using calcium carbonate, talc and white carbon black add to EVA, and studied its physical properties after foaming by supercritical fluid carbon dioxide, In view of the traditional chemical foaming system requires high temperature and a long time to achieve the complete reaction decomposition of chemical foaming agent，This experiment mainly uses less than the traditional chemical foaming of the processing temperature and time on different formulations to foaming it. By changing the amount of different powder added, discussion the effect of tensile strength, tear strength, elongation, density, expansion ratio, and surface hardness, under different content, the relationship between the expansion ratio and the above physical properties is also discussed, and the surface condition and cell structure were observed by optical microscope and SEM. The first step in this article use calcium carbonate, talc, white carbon black for the addition of different content, measure the relationship between the amount of change and the various physical properties, and then according to the different expansion ratio to explore its trend with a variety of physical properties and observing its surface structure and bubble structure in the same time. The second part is compare that the selection of calcium carbonate filled with 10 unit of the foam material and the EVA630 chemical foam materials that refer by literature, Compare the two similarities and differences. The results show that under supercritical fluid, foaming can be successfully performed at low temperature and low pressure, the comprehensive conditions and performance are better than ADC chemical foaming. The different nucleating agents also have different effects on the foamed material, filled with talc and white carbon black, both in tensile strength, tear strength, elongation properties, reinforcement effect and extension performance Comprehensive performance observation, mostly better than the calcium carbonate system, especially the addition of white carbon black in the tensile strength has especially good performance, Talc powder in the tear performance has a good cost-effective. No matter what kind of powder to add, the expansion ratio is negatively correlated with mechanical strength and surface hardness, has a positive correlation with elongation. Optical microscopy and SEM analysis of the observation can be seen that the addition of powder can significantly help the nucleation and growth of bubbles, among them, white carbon black system added to the material let the bubble to achieve the smallest and ideal case, but whether the material surface or internal observation, can be found reunion occurred.
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Chapitres de livres sur le sujet "Physical foaming"

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Li, Furong, Zhicheng Sun, Shouzheng Jiao, Zixiong Que, Xiaoyang Du, Ruping Liu, Siyu He, Shiyi Wang et Luhai Li. « Study on the Printability of Chemical and Physical Foaming Inks ». Dans Lecture Notes in Electrical Engineering, 675–81. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1864-5_92.

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Lakshmi, V. V. K., V. Arun Vikram, K. V. Subbaiah, K. Suresh et B. Surendra Babu. « Effect of Exfoliated Vermiculite as Thickening and Foaming Agent on the Physical Properties of Aluminium Foam ». Dans Advances in Applied Mechanical Engineering, 853–60. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1201-8_91.

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Sun, Xiaowei, Miao Gao, Honghong Zhou, Jing Lv et Zhaoyang Ding. « Influence of Fiber on Properties of Graphite Tailings Foam Concrete ». Dans Lecture Notes in Civil Engineering, 508–15. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_46.

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AbstractThe project used graphite tailings as a filler to prepare graphite tailings foamed concrete. Mainly studied the physical properties, mechanical properties and thermal properties of the foam concrete by graphite tailings, also studied the combination of polypropylene fiber and glass fiber influence of foam concrete compressive strength and cracking strength. The experimental results show that in the case of the same dry density grade, adding 20% graphite tailings can make the foam concrete strength reach its peak. When the water-binder ratio is 0.65 and the self-made chemical foaming agent content is 7%, the optimal total fiber volume blending rate is 0.18%, and the blending ratio of polypropylene fiber and glass fiber is 2:1. The compounding of polypropylene fiber and glass fiber can improve the flexural performance of foam concrete, which is not conducive to the thermal insulation performance of foam concrete, but the test results are still better than industry standards.
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Koczo, Kalman, Mark D. Leatherman, Kevin Hughes et Don Knobloch. « Foaming Chemistry and Physics ». Dans Lubricant Additives, 337–84. Third edition. | Boca Raton : CRC Press, Taylor & Francis Group, 2017. : CRC Press, 2017. http://dx.doi.org/10.1201/9781315120621-19.

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Platikanov, D., V. N. Izmailova et G. P. Yampolskaya. « Physico-Chemical Background of the Foaming Protein Separation for Waste Minimization ». Dans Role of Interfaces in Environmental Protection, 507–20. Dordrecht : Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0183-0_31.

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Di Maio, Ernesto, Salvatore Iannace et Giuseppe Mensitieri. « Gas foaming with physical blowing agents ». Dans Supercritical Fluid Science and Technology, 33–54. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-444-63724-6.00002-0.

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Wypych, George. « EFFECT OF FOAMING ON PHYSICAL-MECHANICAL PROPERTIES OF FOAMS ». Dans Handbook of Foaming and Blowing Agents, 195–217. Elsevier, 2017. http://dx.doi.org/10.1016/b978-1-895198-99-7.50014-3.

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Wypych, George. « EFFECT OF FOAMING ON PHYSICAL-MECHANICAL PROPERTIES OF FOAMS ». Dans Handbook of Foaming and Blowing Agents, 231–60. Elsevier, 2022. http://dx.doi.org/10.1016/b978-1-77467-000-2.50015-7.

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Jerpdal, L., J. Hain et O. Täger. « Lightweight design for increased payload : new ways using polymer composites and physical foaming ». Dans Kunststoffe im Automobilbau 2017, 273–74. VDI Verlag, 2017. http://dx.doi.org/10.51202/9783182443476-273.

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Jerpdal, L., J. Hain et O. Täger. « Lightweight design for increased payload : new ways using polymer composites and physical foaming ». Dans Plastics in Automotive Engineering 2017, 259–60. VDI Verlag, 2017. http://dx.doi.org/10.51202/9783182443483-259.

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Actes de conférences sur le sujet "Physical foaming"

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Petrossian, Gayaneh, et Amir Ameli. « Preparation of Highly Loaded Piezo-Composite Foams With High Expansion and Low Permittivity ». Dans ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3807.

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The sensitivity of piezoelectric/polymer composite materials is inversely proportional to their dielectric permittivity. Introducing a cellular structure into these composites can decrease the permittivity while enhancing their mechanical flexibility. Foaming of highly filled polymer composites is however challenging. Polymers filled with high content of dense additives such as lead zirconate titanate (PZT) exhibit significantly decreased physical foaming ability. This can be attributed to difficulty in gas diffusion, decreased fraction of the matrix available, the reduced number of nucleated cells and the difficulty in cell growth. Here, both CO2 foaming and Expancel foaming were examined as potential methods to fabricate low-density thermoplastic polyurethane (TPU)/ PZT composite foams. While composites containing up to only 10vol.% PZT could be foamed using CO2, Expancel foaming could successfully yield highly-expanded composite foams containing up to 40vol.% (80wt.%) PZT. Dispersed Expancel particles in TPU/PZT composites acted as the blowing agent, activated by subjecting the samples to high temperatures using a hot press. Using Expancel, foams with expansion ratios of up to 9 were achieved. However, expansion ratios of greater than 4 were not of interest due to their poor structural integrity. The density of solid samples ranged from 1.8 to 3.3 g.cm−3 and dropped by a maximum of 80%, even for the highest PZT content, at an expansion ratio of 4. As the expansion increased, the dielectric permittivity of both CO2-foamed and Expancel-foamed TPU/PZT composites decreased significantly (up to 7.5 times), while the dielectric loss and electrical conductivity were affected only slightly. This combination of properties is suitable for high-sensitivity and flexible piezoelectric applications.
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Hopmann, Ch, C. Windeck, S. Hendriks, S. Zepnik et T. Wodke. « Extrusion foaming of thermoplastic cellulose acetate from renewable resources using a two-component physical blowing agent system ». Dans PROCEEDINGS OF PPS-29 : The 29th International Conference of the Polymer Processing Society - Conference Papers. American Institute of Physics, 2014. http://dx.doi.org/10.1063/1.4873746.

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Guarino, S., et V. Tagliaferri. « Fabrication of Aluminium Foam Components by Using Powder Compact Melting Method ». Dans ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58607.

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Recently, closed cell cellular metals have been gaining a very high interest due to their unique characteristic applications in various technology domains. They combine the advantages of a metal with the structural advantages of foam. Among these, aluminium foams have created a great interest due to their light weight structure and their various applications in the automotive, aerospace and allied industries. Aluminium foam possesses high stiffness and low density, it has good energy-absorbing properties making it good for crash-protection and packaging and it has attractive heat-transfer properties that permit to use these materials to cool electronic equipment and as heat exchangers in engines. However, its manufacturing techniques and characterization methods need more attention. The inadequate knowledge on the physical phenomena governing the foaming process does not allow to obtain products with repeatable characteristics. In this paper aluminium foams in various fabrication components were produced by applying the powder compact melting method. In particular metal powders (AlSi7) and powdered gas-releasing blowing agents (TiH2) were mixed and subsequently pressed to obtain a foamable precursor material. The resulting precursor was then foamed by heating it up to above its melting point. Experimental tests were performed to study the fabrication of aluminum foam components and with the extent of optimize the pressing parameters of the foamable precursor material, the foaming temperature and the heating rate during foaming. It was studied the effects of geometrical discontinuities in the mould (such as holes, restrictions, etc) on the evolution and on the morphology of metal foams.
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VISCUSI, A. « Experimental analysis of cold sprayed precursors for closed-cells aluminum foams ». Dans Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-6.

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Abstract. Metal foams are a relatively new class of materials with many interesting combinations of physical and mechanical properties. Among them, the closed-cells aluminum foams are the most interesting for structural applications in the aerospace industry. There exist different methods to produce metal foams. An innovative manufacturing technique was developed in this study, proving the possibility to produce closed-cells aluminum foams through the cold spray additive manufacturing technology (CS). In particular, two different sets of samples were produced by varying the cold spray process parameters aiming at: i) studying the advantages and the issues of cold spray for manufacturing precursors for metal foams; ii) analyzing the correlation among the CS printing strategy and parameters, the foaming process and the physical and the morphological characteristics of the resulting foams; iii) finally, finding appropriate conditions to form closed-cells aluminum foams via CS.
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Rizvi, Hussain R., et Nandika D'Souza. « Design of a Multifunctional Porous Coaxial Electrospun Mesh Using Polycaprolactone (PCL) and Poly Butylene Adipate-CO-Terephthalate (PBAT) ». Dans ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67534.

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In this paper, we formulate a method to create a potential drug delivery vehicle and scaffold architecture of coaxial electrospun fibers. Having the capability to introduce porosity either in core or sheath of the fiber using supercritical CO2 as a foaming agent is utilized. Polycaprolactone (PCL) and Poly butylene adipate-co-terephthalate (PBAT) were used because of their biodegradable and biocompatible nature. Physical morphology of the porous coaxial fibers was studied using Scanning Electron Microscopy (SEM), Image J software was used to quantify the pore size and fiber diameter. Dynamic Mechanical Analysis (DMA) and Tensile Testing of the three-dimensional fibrous mesh was done to determine the mechanical properties of the porous structure. Differential Scanning Calorimeter (DSC) was used to study the thermal characteristics of the mesh.
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Tampubolon, Grecy Kristina, Mukti Hamjah Harahap et Winsyah Putra. « Review of the Physical Properties of CLC Lightweight Concrete Using the Addition of Red Sand from Labuhan Batu Selatan ». Dans The 5th International Conference on Science and Technology Applications. Switzerland : Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-zd0pw0.

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This research aims to review the physical properties of Lightweight Cellular Concrete (CLC) bricks with the addition of Labuhan Batu Selatan red sand. CLC bricks have the advantage of being lightweight and larger in size, which can expedite the construction process. CLC bricks are made by adding air bubbles/foaming agents to the mortar mix as an expander to produce lightweight bricks with a lower material composition. It is crucial for the air bubbles to maintain their shape during the mortar curing process without causing any chemical reactions. In this study, lightweight bricks were made by experimenting with various combinations of red sand and river sand, with variations of 0% red sand and 100% red sand, using the Cellular Lightweight Concrete (CLC) method. The research method employed was experimental, testing the physical properties of CLC lightweight bricks, specifically density and compressive strength, in accordance with the SNI 03-6825-2002 standard. As a result, with the addition of red sand in the production of CLC lightweight bricks, the density falls within the lightweight brick category, but it does not significantly improve the compressive strength of the lightweight bricks. This is because the CaCO3 (calcium carbonate) content in the CLC lightweight brick mix has the highest intensity, causing the bricks to become brittle. Therefore, this research suggests paying more attention to the mixing and blending processes of the materials to achieve a more uniform distribution.
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Marcano, Luis, Xiomara Santana Gutierrez, Beatriz Perez et Edward Martinez. « Effect of Some Physical-Chemical Variables on the Formation and Stability of Foam in Oil-Gas Systems and Their Correlation With the Formation of Foaming Crude Oil ». Dans Latin American and Caribbean Petroleum Engineering Conference. Society of Petroleum Engineers, 2009. http://dx.doi.org/10.2118/123060-ms.

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Rao, Jiajia. « Tuning plant protein for improved functionality and flavor profile : From field to application ». Dans 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/xqxj4886.

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Recently, plant proteins are gaining in popularity as consumers are looking to rebalance their diet with more plant-based options. As such, there is a need to understand the potential of these plant proteins to deliver nutrition and functionality in various food products. However, plant proteins are still under-utilization in food and beverage industry due to their characteristic beany and off flavor, lower technical functionality, such as limited solubility, and some negative taste attributes. In general, plant protein can be obtained from pulses, cereals and oilseeds. Each plant has a unique protein structure and composition, thus protein extracted from different plant has different functional properties and performance in food. In general, plant contain non-protein components including starch, fiber and oil. High purity of plant protein are often extracted to by removing all abovementioned non-protein components through extraction processing. One would expect different extraction methods can influence protein functionality through denaturation, modification, hydrolysis and cross-linking. This talk begins with the discussion of how different plant variety and processing impact on protein functionality using hemp protein as an example. Selective physical and chemical modification methods (e.g., soluble complexes, pH shift, maillard reaction, phosphorylation) for generating novel protein constructs with preferable solubility, foaming, and emulsification properties, thermal stability, and flavor profiles will be comprehensively discussed by using pea protein isolate (PPI) as a representative. In general, protein solubility could be improved by means of abovementioned three methods. Maillard-driven synthesis of the cross-linked PPI-gum arabic conjugates greatly improved the flavor profile and functionality of PPI. In terms of phosphorylation, sodium hexametaphosphate (SHMP) is a good candidate to form phosphorylated PPI with enhanced functionalities including foaming, emulsifying properties and thermal stability. Our results suggested that protein structure-function researches are valuable in tailoring proteins for specific functional outcomes and expanding the availability of plant proteins.
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Zvada, Maiia Vladimirovna, Pavel Nikolaevich Belovus, Evgeny Ivanovich Sergeev, Nikolay Grigorevich Glavnov, Mikhail Alekseevich Varfolomeev et Emil Rinatovich Saifullin. « Study of the Efficiency of Gel and Polymer-Stabilized Foam Systems for Gas Shut-Off in Horizontal Wells ». Dans SPE Russian Petroleum Technology Conference. SPE, 2021. http://dx.doi.org/10.2118/206404-ms.

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Abstract This article describes the assessment of effectiveness of gel and foaming agents for gas shut-off treatments in horizontal wells. The research is carried out through the implementation of a complex of special laboratory studies and analysis of the results using numerical modeling methods. A list of necessary laboratory experiments to minimize risks when carrying out work to limit gas inflow has been formulated, and approaches to carrying it out have been described. The program includes: free volume studies, filtration on linear and parallel core models. The results confirm the importance of studying not only the agent's physical characteristics at the reservoir conditions, but their interaction with reservoir fluids. The influence of different agents on the mobility of gas and oil was assessed as a result of linear core flooding experiments. In addition, the filtration tests on parallel cores were carried out aimed to determining the saturation selectivity. The series of numerical calculations was performed for the subsequent determination of the technological and economic effects of the treatment with gas blockers.
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Mohamad, Abdelrahman, Fouzia Khadraoui, Nassim Sebaibi, Mohamed Boutouil et Daniel Chateigner. « Water Sensitivity of Hemp-Foam Concrete ». Dans 4th International Conference on Bio-Based Building Materials. Switzerland : Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.135.

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The necessity to build energy-efficient and low environmental impact buildings favors the development of biobased light-weight materials as hemp-foam concretes. In this context, experimental protocols were developed to study the effects of hemp shiv and the production methods on the water sensitivity of bio-based foamed concrete (BBFC). Foam concrete incorporates several materials and compounds: cement, protein-based foaming agent, ground granulated blast–furnace slag, metakaolin as a binder, and hemp shiv as bio-based aggregates. The study investigated first the effect of the incorporation of hemp shiv (from 0 to 15 vol%) and then the elaboration method, comparing direct method versus preformed method on the resulting physical properties, the isotherms sorption-desorption and the capillary water absorption of hemp-foam concretes. We observe an increasing porosity of the concrete with hemp shives content. Additionally, hemp shives increase the adsorption and the capillary absorption of water. Moreover, the preformed method produces concretes more sensitive to water than the direct methods since it increases its porosities.
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