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Artykuły w czasopismach na temat „Macroporus Sponges”

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Data publikacji: 6 września 2023

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1

Petrenko, Yu A., N. A. Volkova, E. P. Zhulikova, L. G. Damshkaln, V. I. Lozinsky i A. Yu Petrenko. "Choice of conditions of human bone marrow stromal cells seeding into polymer macroporus sponges". Biopolymers and Cell 24, nr 5 (20.09.2008): 399–405. http://dx.doi.org/10.7124/bc.0007b8.

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Obata, Akiko, Megumi Sasaki i Toshihiro Kasuga. "Preparation of Macroporous Glass-Ceramic Composites Containing β-TCP". Advanced Materials Research 11-12 (luty 2006): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.223.

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A macroporous phosphate invert glass ceramic (PIGC) was prepared by dipping polymer sponges in the powder-slurry of the mother glass with a composition of 60CaO-30P2O-3TiO2- 7Na2O in mol%, and subsequent burning off the sponge at 850°C for 1 hr. The macroporous PIGC consists predominantly of ß-tricalcium phosphate (β-TCP) and ß-calcium pyrophosphate, and it has macropores of 500 μm in diameter and porosity of 83 %. Its compressive strength was estimated to be 160 kPa. The PIGC composite containing a large amount of β-TCP was also prepared by heating the mixture of Ca(OH)2 with the mother glass powders of the PIGC. Solubility of the composite was higher than PIGC. The macroporous PIGC and PIGC composite were expected to be applicable in high resorbable scaffolds for bone tissue engineering.

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3

Stejskal, Jaroslav, Jarmila Vilčáková, Marek Jurča, Haojie Fei, Miroslava Trchová, Zdeňka Kolská, Jan Prokeš i Ivo Křivka. "Polypyrrole-Coated Melamine Sponge as a Precursor for Conducting Macroporous Nitrogen-Containing Carbons". Coatings 12, nr 3 (1.03.2022): 324. http://dx.doi.org/10.3390/coatings12030324.

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Macroporous open-cell melamine sponges were coated with a conducting polymer, polypyrrole, during in-situ oxidative polymerization of pyrrole. Two samples, differing in polypyrrole content, 8.2 and 27.4 wt%, were prepared. They were exposed to various temperatures up to 700 °C in an inert atmosphere. The macroporous structure and mechanical integrity were preserved after this process. This converted both the polypyrrole coating and the melamine sponge to macroporous nitrogen-containing carbons. The changes in molecular structure in the course of carbonization were followed by elemental analysis and FTIR and Raman spectra. The specific surface area of polypyrrole-coated sponge increased from ca. 90 to ca. 300 m2 g−1 along with accompanying increase in the porosity. The conductivity of the sponges was recorded as a function of compression in a newly developed apparatus. The sponge containing 27.4 wt% pyrrole had conductivity of the order of 10−2 S·cm−1 at 0.1 MPa pressure, which was reduced by four orders of magnitude when exposed to 400–500 °C and nearly recovered after the temperature reached 700 °C. The sponges were tested in electromagnetic radiation shielding and displayed both radiation absorption and, to a lower extent, radiation reflection proportional mainly to the samples’ conductivity.

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4

Xu, Changlu, Yanjie Bai, Huilin Yang i Lei Yang. "Mechanically Modulated, Ultra-high Precision Logic Delivery of Molecules by Bio-inspired Macroporous Ceramic Sponge". MRS Advances 2, nr 19-20 (2017): 1125–30. http://dx.doi.org/10.1557/adv.2017.87.

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ABSTRACTInspired by sea sponges, porous Al2O3/starch composite sponges were designed and fabricated as a new controlled release system enabling mechano-triggered logic delivery of molecules. Results of material characterization indicate that the all the composite sponges had a high macro-porosity of >80%, and dehydrated sponges revealed favorable pore structure for drug loading and retaining. The composite sponges have moisture-dependent mechanical properties and samples with appropriate moisture contents revealed high resilience and mechanical robustness under cyclic deformation. Based on the unique mechanical properties of the composite sponge, mechanically modulated, nano-gram precision delivery of model molecules was achieved in an AND logic manner gated by both moisture and compressive strain.

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5

Wu, Zhen Jiang, Yun Fa Chen i Yeon Tae Yu. "Preparation and Characterization of Macroporous Pumice-Porcelain Composite Foams". Key Engineering Materials 368-372 (luty 2008): 1513–15. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1513.

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The open-cell macroporous ceramic foams can be used to air and water decontamination after loading catalyst. A new kind of ceramic foam was prepared using pumice, porcelain stone, quartz as main raw materials and polyurethane sponge as template. During the process, the polyurethane sponges were immersed in the powder slurry while submerged to fill all the pores, which makes it uniformly coating the sponge. Then the samples were dried at 80°C, and then sintered at 1050°C -1200°C for 2h in air. The ceramic foams present high porosity from 75% to 90%, higher compassion strength from 10 MPa to 50MPa and lower volume density from 0.15g/cm3 to 0.32g/cm3. The SEM images revealed the open-cell structure in the product.

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6

Pan, Yanxiong, Zhi Liu, Weicai Wang, Chao Peng, Kai Shi i Xiangling Ji. "Highly efficient macroporous adsorbents for toxic metal ions in water systems based on polyvinyl alcohol–formaldehyde sponges". Journal of Materials Chemistry A 4, nr 7 (2016): 2537–49. http://dx.doi.org/10.1039/c5ta09295g.

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A series of macroporous adsorbents based on polyvinyl alcohol–formaldehyde (PVF) sponges was prepared using redox-initiated grafting polymerization of acrylamide (AM) followed by hydrolysis under alkaline conditions, and used as efficient macroporous adsorbents in water medium.

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7

Xie, Wei-Dong, Meng Wang, Xiao-Qi Wang, Yan-Di Wang i Chang-Qing Hu. "Nano-Pore Structure and Fractal Characteristics of Shale Gas Reservoirs: A Case Study of Longmaxi Formation in Southeastern Chongqing, China". Journal of Nanoscience and Nanotechnology 21, nr 1 (1.01.2021): 343–53. http://dx.doi.org/10.1166/jnn.2021.18721.

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Pore structure and fractal dimensions can characterize the adsorption, desorption and seepage characteristics of shale gas reservoirs. In this study, pore structure, fractal characteristics and influencing factors were studied of the Longmaxi formation shale gas reservoir in southeastern Chongqing, China. Scanning electron microscopy was used to describe the characteristics of various reservoirs. High pressure mercury intrusion and low temperature liquid N2 and CO2 adsorption experiments were used to obtain pore structure parameters. V–S model, FHH model and Menger sponge model were selected to calculate the micropore, mesopore and macropore fractal dimensions, respectively. The results show that organic matter pores, inter-granular pores, intra-granular pores and micro-fractures are developed within the shale, and the pore morphology is mostly ink pores and parallel plate pores with aperture essentially in the 1–2 nm and 2–50 nm ranges. Moreover, macropores are the most complex in these samples, with mesopores being less complex than macropores, and the micropores being the simplest. D1 (micropore fractal dimension) ranges from 2.31 to 2.50, D2 (mesopore fractal dimension) ranges from 2.74 to 2.83, D3 (macropore fractal dimension) ranges from 2.87 to 2.95, and Dt (comprehensive fractal dimension) ranges from 2.69 to 2.83 of fractal characteristics. D1 and D2 are mainly controlled by TOC content, while D3 and Dt are mainly controlled by brittle and clay mineral content. These results may be helpful for exploration and the development of shale gas in southeastern Chongqing, China.

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8

Pan, Yanxiong, Chao Peng, Weicai Wang, Kai Shi, Zhi Liu i Xiangling Ji. "Preparation and absorption behavior to organic pollutants of macroporous hydrophobic polyvinyl alcohol–formaldehyde sponges". RSC Adv. 4, nr 67 (2014): 35620–28. http://dx.doi.org/10.1039/c4ra03278k.

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A series of macroporous hydrophobic polyvinyl alcohol–formaldehyde sponges (PVF–G_n–H_ms) are preparedviathe reactions of hydrophilic polyvinyl alcohol–formaldehyde (PVF) sponges with glutaraldehyde (GA) and fatty acyl chloride. Both ATR-IR and solid-state CP/MAS.

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9

Joseph, Jickson, Anjali Paravannoor, Shantikumar V. Nair, Zhao Jun Han, Kostya (Ken)Ostrikov i Avinash Balakrishnan. "Supercapacitors based on camphor-derived meso/macroporous carbon sponge electrodes with ultrafast frequency response for ac line-filtering". Journal of Materials Chemistry A 3, nr 27 (2015): 14105–8. http://dx.doi.org/10.1039/c5ta03012a.

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10

Cao, Jinfeng, Dengxu Wang, Peng An, Jie Zhang i Shengyu Feng. "Highly compression-tolerant and durably hydrophobic macroporous silicone sponges synthesized by a one-pot click reaction for rapid oil/water separation". Journal of Materials Chemistry A 6, nr 37 (2018): 18025–30. http://dx.doi.org/10.1039/c8ta07327a.

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Macroporous silicone sponges were first synthesized via a one-pot click reaction, which have controllable porosity, low density, durable hydrophobicity, superoleophilicity, good thermal insulation, and excellent compressibility.

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11

Toh, Tan Boon, Zheng Liu, Hanry Yu i Eliza Li Shan Fong. "Three-Dimensional Macroporous Sponge for the Culture of Hepatocellular Carcinoma Patient-Derived Xenograft Organoids". SLAS TECHNOLOGY: Translating Life Sciences Innovation 26, nr 3 (27.03.2021): 249–54. http://dx.doi.org/10.1177/24726303211000685.

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This protocol focuses on the culture of cells harvested from hepatocellular carcinoma (HCC) patient-derived xenografts (PDXs) as organoids using a cellulosic macroporous sponge scaffold. Compared with many other epithelial cancer types, the viability of HCC cells directly derived from patients or PDX models is notoriously challenging to maintain in vitro. We previously developed a macroporous sponge scaffold uniquely designed to provide biochemical and mechanical cues that support the culture of normal hepatocytes as spheroids with maintained functionality. Leveraging our success using this sponge scaffold to maintain normal hepatocytes in vitro, we recently demonstrated that a similar sponge scaffold enables the maintenance of HCC PDX cells as organoids with preserved viability, molecular features, and heterogeneity.

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12

Chatterjee, Soumyajyoti, Pankaj Doshi i Guruswamy Kumaraswamy. "Capillary uptake in macroporous compressible sponges". Soft Matter 13, nr 34 (2017): 5731–40. http://dx.doi.org/10.1039/c7sm00826k.

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13

Wang, Xiaocheng, Mengchao Shi, Dong Zhai i Chengtie Wu. "Preparation, physicochemical properties and in vitro bioactivity of hierarchically porous bioactive glass scaffolds". RSC Advances 5, nr 120 (2015): 98796–804. http://dx.doi.org/10.1039/c5ra19125d.

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14

Pan, Yanxiong, Kai Shi, Zhi Liu, Weicai Wang, Chao Peng i Xiangling Ji. "Synthesis of a new kind of macroporous polyvinyl-alcohol formaldehyde based sponge and its water superabsorption performance". RSC Advances 5, nr 96 (2015): 78780–89. http://dx.doi.org/10.1039/c5ra11958h.

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Novel superabsorbents based on hydrophilic and macroporous PVF sponges are prepared through the grafting polymerization of hydrophilic AM on the PVF and PVF–GA network and through subsequent partial hydrolysis under alkaline conditions.

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15

Kim, Min Chul, Byung Hyun Lee, Kyoung Nam Kim, Kwang Mahn Kim, Seong Ho Choi, Chong Kwan Kim, Racquel Z. LeGeros i Yong Keun Lee. "Application of X-Ray Micro-Computed Tomography on Macroporous Calcium Phosphate Glass Scaffolds". Key Engineering Materials 309-311 (maj 2006): 1087–90. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.1087.

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A numerous techniques have been applied to fabricate three-dimensional scaffolds of high porosity and surface area. And X-ray micro computed tomography can be used studying the architecture of scaffold. In this study, we fabricated three-dimensional macroporous scaffold by polymeric sponge method using calcium phosphate glass. Calcium phosphate glass slurry was prepared by dissolving the glass powder in water polyvinyl alcohol, polyethylene glycol and dimethyl formamide. Reticulated polyurethane sponges were used as a template and were coated with the prepared slurry by infiltration technique several times. Sintering at 950oC exhibited dense microstructure as well as entire elimination of organic additives. By repeating the coating and sintering process, it was possible to decrease the pore size and be thick the strut of the structure. The unique feature of the micro computed tomography is that the three dimensions computed reconstruction can be sliced along any direction to gain accurate information on the internal geometric properties and structural parameters of scaffold. Porosity, surface area per unit volume and mean thickness of strut were evaluated through imaging and computer software of scaffold scan data.

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16

Kim, Yeon Ung, Byung Hyun Lee, Min Chul Kim, Kyoung Nam Kim, Kwang Mahn Kim, Seong Ho Choi, Chong Kwan Kim, Racquel Z. LeGeros i Yong Keun Lee. "Effect of Cooling Rate and Particle Size on Compressive Strength of Macroporous Hydroxyapatite". Key Engineering Materials 309-311 (maj 2006): 1047–50. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.1047.

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The objective of this study was to produce a macroporous hydroxyapatite(HA) scaffold with high strength by controlling the size of HA particles as well as cooling rate from the sintering temperature. Macroporous polyurethane sponge was employed as template to manufacture the macroporous HA scaffolds. Particle sizes of HA powders selected in this study were 4 µm and 7 µm. They were dispersed in distilled water with organic additives and infiltrated into polyurethane sponge. After drying and sintering at 1300oC, cooled down to room temperature slowly to prevent microcracking either 1oC/min or 3oC/min. Density, porosity and compressive strength were measured with different particle size and cooling rate. Both density and compressive strength were increased with decreasing particle size or cooling rate, while porosity was not related to.

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17

Sopyan, Iis, J. Kaur, A. R. Toibah, Mohd Hamdi Bin Abdul Shukor i Ramesh Singh. "Effect of Slurry Preparation on Physical Properties of Porous Hydroxyapatite Prepared via Polymeric Sponge Method". Advanced Materials Research 47-50 (czerwiec 2008): 932–35. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.932.

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Hydroxyapatite porous materials for cancellous bone applications were prepared via polymeric sponge method. Suspensions of the nanostructured hydroxyapatite powders were prepared via stirring of the mixture of hydroxyapatite powder, water, and dispersing agent. The stirring time was adjusted at 4 and 20 hours. After soaking cellulosic sponges into the suspension, the sponges were dried and then subjected to heat-treatment at 600°C, followed by sintering at 1250°C for 1 h. No additional phases were identified in the sintered porous hydroxyapatite. This result showed that the sintering process did not alter the hydroxyapatite phase composition. The study found that the apparent density of the porous bodies varied from 1.69 g/cm3 to 2.03 g/cm3 with 35.6 – 46.2 % porosities and 100-500 microns macropore size depending on the composition of slurry and the stirring time. Longer stirring time resulted in the breakdown of HA agglomerates and the slurry obtained tends to be more homogeneous, leading to higher density and better compressive strength of the sintered porous bodies. The measurement of compressive strength provided the values of 4.3 MPa and 10 MPa for 4 h and 20 h stirring time, which is in the range of mechanical strength of human cancellous bone.

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18

Bi, Shiming, Yankai Li, Shaoze Zhang, Jun Hu, Limin Wang i Honglai Liu. "A diketopyrrolopyrrole-based fluorescent porous organic polymer as fluoride sensing monolithic device". Journal of Materials Chemistry C 6, nr 15 (2018): 3961–67. http://dx.doi.org/10.1039/c8tc00183a.

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Zvukova, Natalia D., Tamara P. Klimova, Roman V. Ivanov, Andrei N. Ryabev, Archil V. Tsiskarashvili i Vladimir I. Lozinsky. "Cryostructuring of Polymeric Systems. 52. Properties, Microstructure and an Example of a Potential Biomedical Use of the Wide-Pore Alginate Cryostructurates". Gels 5, nr 2 (9.05.2019): 25. http://dx.doi.org/10.3390/gels5020025.

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Wide-pore cryostructurates were prepared via freezing sodium alginate aqueous solutions with subsequent ice sublimation from the frozen samples, followed by their incubation in the ethanol solutions of calcium chloride or sulfuric acid, rinsing, and final drying. Such sequence of operations resulted in the calcium alginate or alginic acid sponges, respectively. The swelling degree of the walls of macropores in such matrices decreased with increasing polymer concentration in the initial solution. The dependence of the degree of swelling on the cryogenic processing temperature had a bell-like character with a maximum for the samples formed at −20 °C. According to 1H NMR spectroscopy, the content of mobile (non-frozen) water in the frozen water-sodium alginate systems also depended on the initial polymer concentration and freezing temperature. The cryostructurates obtained did not lose their integrity in water, saline, in an acidic medium at pH 2 for at least three weeks. Under alkaline conditions at pH 12 the first signs of dissolution of the Ca-alginate sponge arose only after a week of incubation. Microbiological testing of the model depot form of the antibiotics entrapped in the Ca-alginate cryostructurate demonstrated the efficiency of this system as the antibacterial material.

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20

Chen, Wei, R. B. Rakhi i H. N. Alshareef. "High energy density supercapacitors using macroporous kitchen sponges". Journal of Materials Chemistry 22, nr 29 (2012): 14394. http://dx.doi.org/10.1039/c2jm32030d.

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21

Duan, Gaigai, Amir Reza Bagheri, Shaohua Jiang, Jacob Golenser, Seema Agarwal i Andreas Greiner. "Exploration of Macroporous Polymeric Sponges As Drug Carriers". Biomacromolecules 18, nr 10 (31.08.2017): 3215–21. http://dx.doi.org/10.1021/acs.biomac.7b00852.

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Zha, Li, Yahui Zheng, Jianfei Che i Yinghong Xiao. "Mineralization of phosphorylated cellulose/sodium alginate sponges as biomaterials for bone tissue engineering". New Journal of Chemistry 45, nr 47 (2021): 22354–60. http://dx.doi.org/10.1039/d1nj04397h.

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The incorporation of SA in the cellulose matrix effectively increased the macroporous ability of composite scaffolds. Furthermore, the phosphorylation has a certain induction capability for the growth of HA.

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David, Geta, Alexandra I. Bargan, Mioara Drobota, Adrian Bele i Irina Rosca. "Comparative Investigation of Collagen-Based Hybrid 3D Structures for Potential Biomedical Applications". Materials 14, nr 12 (15.06.2021): 3313. http://dx.doi.org/10.3390/ma14123313.

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Collagen is a key component for devices envisaging biomedical applications; however, current increasing requirements impose the use of multicomponent materials. Here, a series of hybrid collagen-based 3D materials, comprising also poly(ε-caprolactone) (PCL) and different concentrations of hyaluronic acid (HA)—in dense, porous or macroporous form—were characterized in comparison with a commercially available collagen sponge, used as control. Properties, such as water uptake ability, water vapour sorption, drug loading and delivery, were investigated in correlation with the material structural characteristics (composition and morphology). Methylene blue (MB) and curcumin (CU) were used as model drugs. For spongeous matrices, it was evidenced that, in contrast to the control sample, the multicomponent materials favor improved sustained release, the kinetics being controlled by composition and cross-linking degree. The other characteristics were within an acceptable range for the intended purpose of use. The obtained results demonstrate that such materials are promising for future biomedical applications (wound dressings and lab models).

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24

Barsch, Friedrich, Andreas Mamilos, Volker H. Schmitt, Maximilian Babel, Lina Winter, Willi Wagner, Hinrich Winther i in. "In Vivo Comparison of Synthetic Macroporous Filamentous and Sponge-like Skin Substitute Matrices Reveals Morphometric Features of the Foreign Body Reaction According to 3D Biomaterial Designs". Cells 11, nr 18 (11.09.2022): 2834. http://dx.doi.org/10.3390/cells11182834.

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Synthetic macroporous biomaterials are widely used in the field of skin tissue engineering to mimic membrane functions of the native dermis. Biomaterial designs can be subclassified with respect to their shape in fibrous designs, namely fibers, meshes or fleeces, respectively, and porous designs, such as sponges and foams. However, synthetic matrices often have limitations regarding unfavorable foreign body responses (FBRs). Severe FBRs can result in unfavorable disintegration and rejection of an implant, whereas mild FBRs can lead to an acceptable integration of a biomaterial. In this context, comparative in vivo studies of different three-dimensional (3D) matrix designs are rare. Especially, the differences regarding FBRs between synthetically derived filamentous fleeces and sponge-like constructs are unknown. In the present study, the FBRs on two 3D matrix designs were explored after 25 days of subcutaneous implantation in a porcine model. Cellular reactions were quantified histopathologically to investigate in which way the FBR is influenced by the biomaterial architecture. Our results show that FBR metrics (polymorph-nucleated cells and fibrotic reactions) were significantly affected according to the matrix designs. Our findings contribute to a better understanding of the 3D matrix tissue interactions and can be useful for future developments of synthetically derived skin substitute biomaterials.

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Grigoriev, A. M., Yu B. Basok, A. D. Kirillova, V. A. Surguchenko, N. P. Shmerko, V. K. Kulakova, R. V. Ivanov, V. I. Lozinsky, A. M. Subbot i V. I. Sevastianov. "Cryogenically structured gelatin-based hydrogel as a resorbable macroporous matrix for biomedical technologies". Russian Journal of Transplantology and Artificial Organs 24, nr 2 (13.05.2022): 83–93. http://dx.doi.org/10.15825/1995-1191-2022-2-83-93.

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Objective: to investigate the biological properties of a matrix made of cryogenically structured hydrogel in the form of a macroporous gelatin sponge, as well as the possibility of creating cell-engineered constructs (CECs) on its basis. Materials and methods. The main components of the cryogenically structured hydrogel were gelatin (type A) obtained from porcine skin collagen, N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide, (EDC) and urea (all from Sigma-Aldrich, USA). Surface morphology was examined using scanning electron microscopy (SEM). The degree of swelling in water of the samples was determined by gravimetric method. Cytotoxicity was studied on NIH3T3, a fibroblast cell line isolated from a mouse, and on human adipose-derived mesenchymal stem/stromal cells (hAMSCs) using IncuCyte ZOOM (EssenBioscience, USA). The metabolic activity of hAMSCs was assessed using PrestoBlue™ reagents (Invitrogen™, USA). To create CECs, we used hAMSCs, human hepatocellular carcinoma cell line HepG2 or human umbilical vein endothelial cell lines EA.hy926. Albumin content in the culture medium was determined by enzyme immunoassay. Ammonia metabolism rate was assessed after 90 minutes of incubation with 1 mM ammonium chloride (Sigma-Aldrich, USA) diluted in a culture medium on day 15 of the experiment. Results. Obtaining a cryogenically structured hydrogel scaffold in the form of macroporous gelatin sponge included freezing an aqueous solution of a gelatin+urea mixture, removal of polycrystals of frozen solvent by lyophilization, extraction of urea with ethanol and treatment of the cryostructurate with an ethanol solution of EDC. Scanning electron microscopy identified three types of pores on the carrier surface: large (109 ± 17 μm), medium (39 ± 10 μm), and small (16 ± 6 μm). The degree of swelling in water of the matrix samples was 3.8 ± 0.2 g H2O per 1 g of dry polymer. The macroporous gelatin sponge as a part of CEC was found to have the ability to support adhesion and proliferation of hAMSCs, EA.hy926 and HepG2 for 28, 15 and 9 days, respectively. Albumin secretion and ammonia metabolism when HepG2 cells were cultured on the gelatin sponge were detected. Conclusion. The use of a matrix made from macroporous cryogenically structured gelatin-based hydrogel for tissue engineering products is shown to be promising using a cell-engineered liver construct as a case.

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Liu, Yuxi, Zechuan Xiao, Yongchang Liu i Li-Zhen Fan. "Biowaste-derived 3D honeycomb-like porous carbon with binary-heteroatom doping for high-performance flexible solid-state supercapacitors". Journal of Materials Chemistry A 6, nr 1 (2018): 160–66. http://dx.doi.org/10.1039/c7ta09055b.

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N and S-co-doped activated corncob sponge of honeycomb-like porous carbon with the interconnected micro-meso-macropores and the large specific surface area was evaluated as an electrode material for flexible solid-state supercapacitors, exhibiting high specific capacitance, high energy–power density, and great cyclic stability.

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Yan, Jia, An Jie Wang i Dong Pyo Kim. "Preparation of Silver Metallic Sponge from Macroporous Carbon Template". Materials Science Forum 510-511 (marzec 2006): 770–73. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.770.

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Silver-containing porous frameworks have been extensively used in catalysis, electrochemistry, for heat dissipation and biofiltration. In this study, porous silver sponge was prepared by using a sacrificial macroporous carbon template. Aqueous AgNO3 was infiltrated into the carbon template and reduced to Ag by borohydride reduction reaction, followed by burning of the sacrificial template in air at 500~650°C. The products were characterized by SEM, XRD, and N2 adsorption-desorption isotherms. The Ag sponge exhibited a BET surface area of 12 m2/g.

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Dinu, Ionel Adrian, Luminita Ghimici i Irina Elena Raschip. "Macroporous 3D Chitosan Cryogels for Fastac 10EC Pesticide Adsorption and Antibacterial Applications". Polymers 14, nr 15 (2.08.2022): 3145. http://dx.doi.org/10.3390/polym14153145.

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The pesticide pollution of surface water and wastewater has been recognized as a major worldwide concern due to their persistence in the aquatic environment and the potential adverse effects on human, flora, and fauna health. Apart from pesticides, bio-contamination with various bacterial populations leads to waterborne diseases. Hence, it becomes vital to remove the above-mentioned pollutants from water using a suitable process. Consequently, our study emphasized the potential benefits of a highly porous, chemically cross-linked 3D chitosan (CSGA) cryogel in the removal of pesticides and bacteria. The CSGA sponges were prepared using a facile and cost-effective approach that consisted of a three-step cryogenic process: (i) freezing at −18 °C, (ii) storage in a frozen state for a certain period, and (iii) thawing at room temperature. Batch adsorption experiments were performed under different environments, where the effects of several parameters, such as pH, contact time, and initial pollutant concentration were evaluated to identify the appropriate adsorption conditions for maximum pesticide removal. The CSGA-based cryogel sponges exhibited a theoretical maximum adsorption capacity of 160.82 mg g−1 for the Fastac 10EC pesticide and very good recyclability at room temperature. In addition, the antibacterial activities of these sponges were also investigated against various bacterial pathogens. The rates of killing Escherichia coli, Listeria monocytogenes, and Staphylococcus aureus were close to 82%, 100%, and 99%, respectively. These results demonstrated that CSGA cryogels could be efficiently used in water remediation and find applications in the removal of pesticides and disinfection.

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Choi, Soonmo, Sunmi Zo, Gyutae Park, Eunjoo Shin i Sungsoo Han. "Preparation of Waterborne Polyurethane-Based Macroporous Sponges as Wound Dressings". Journal of Nanoscience and Nanotechnology 20, nr 8 (1.08.2020): 4634–37. http://dx.doi.org/10.1166/jnn.2020.17827.

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Recently, eco-friendly and biologically harmless products of waterborne polyurethane (WPU) instead of solvent-borne polyurethane have been strongly progressed in both industries and research areas. Accordingly, we developed a WPU-based macroporous sponge as a skin tissue engineering matrix. Also, the WPU dispersion in water was modified by using a foaming agent in order to create creamy emulsion resulting in enlarging surface area wherein cells could adhere, grow, and proliferate. We investigated the effect of a foaming agent on the morphology of surface and internal structure, wettability. In vitro studies also confirmed enhanced adherence and proliferation of cells with increased metabolic rate. These results proved that the use of foaming agent could alter the internal structure, surface property, and biocompatibility.

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Jalili-Firoozinezhad, Sasan, Sareh Rajabi-Zeleti, Parvaneh Mohammadi, Emanuele Gaudiello, Shahin Bonakdar, Mehran Solati-Hashjin, Anna Marsano i in. "Facile Fabrication of Egg White Macroporous Sponges for Tissue Regeneration". Advanced Healthcare Materials 4, nr 15 (16.09.2015): 2281–90. http://dx.doi.org/10.1002/adhm.201500482.

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She, Ping, Kongliang Xu, Shengyan Yin, Yinxing Shang, Qinrong He, Shan Zeng, Hang Sun i Zhenning Liu. "Bioinspired self-standing macroporous Au/ZnO sponges for enhanced photocatalysis". Journal of Colloid and Interface Science 514 (marzec 2018): 40–48. http://dx.doi.org/10.1016/j.jcis.2017.12.003.

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Kim, Yeon Ung, Min Chul Kim, Kyoung Nam Kim, Kwang Mahn Kim, Seong Ho Choi, Chong Kwan Kim, Racquel Z. LeGeros i Yong Keun Lee. "Effect of Calcium Phosphate Glass on Compressive Strength of Macroporous Hydroxyapatite Scaffold". Key Engineering Materials 284-286 (kwiecień 2005): 313–16. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.313.

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This study presents the manufacture of macroporous hydroxyapatite scaffolds with a small amount of calcium phosphate glass powder as sintering additives. Hydroxyapatite slurry was prepared by suspending the hydroxyapatite and glass powder in water. Polyurethane sponge was used to produce highly macroporous scaffolds. The rheological characteristic of the slurry was measured to identify the effect of adding calcium phosphate glass powder into hydroxyapatite slurry. Sintered scaffolds could be repeatedly coated to improve mechanical properties. Scaffolds prepared by single and double replication cycle process were characterized by density, porosity and compressive strength measurements by increasing amount of the calcium phosphate glass powder to the hydroxyapatite slurry, viscosity by increased more than same amount of pure hydroxyapatite, and the capillary force was similar to pure hydroxyapatite slurry. The compressive strength of the macroporous hydroxyxapatite scaffold containing the calcium phosphate glass powder showed higher value than that of pure hydroxyapatite at single replication cycle. SEM demonstrated that the microstructure of the scaffold became denser with the introduction of the calcium phosphate glass powder. The pore struts were thicker as replication cycle was increased.

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Stejskal, Jaroslav, Dušan Kopecký, Hayk Kasparyan, Jarmila Vilčáková, Jan Prokeš i Ivo Křivka. "Melamine Sponges Decorated with Polypyrrole Nanotubes as Macroporous Conducting Pressure Sensors". ACS Applied Nano Materials 4, nr 7 (6.07.2021): 7513–19. http://dx.doi.org/10.1021/acsanm.1c01634.

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Li, Xinda, Yi Chen, Amit Kumar, Ahmed Mahmoud, John A. Nychka i Hyun-Joong Chung. "Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator". ACS Applied Materials & Interfaces 7, nr 37 (15.09.2015): 20753–60. http://dx.doi.org/10.1021/acsami.5b05702.

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35

Fadli, Ahmad, Prihartini Widiyanti, Deni Noviana, Agung Prabowo i Heni Ismawati. "Preparation of Hydroxyapatite Scaffold using Luffa Cylindrica Sponge as Template". Jurnal Rekayasa Kimia & Lingkungan 15, nr 2 (17.08.2020): 62–70. http://dx.doi.org/10.23955/rkl.v15i2.15957.

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Hydroxyapatite (HA) scaffold has been widely applied in the biomedical field especially for bone implants. The purpose of this research is to determine the influence of dispersant addition and stirring time on HA scaffold which formed using gambas sponges as a template. HA slurry was made by mixing 10 grams of HA, 12 grams of aquadest, 0,2; 0,25; 0,3 grams of Darvan 821A and 1 gram of sago. The slurry was impregnated into Luffa cylindrica sponges. The sample then dried at 110oC for 3 hours. The green bodies were burned at 600oC for 1 hour and followed by sintering at 1250oC for 1 hour. The results showed that the addition of dispersant and increasing of stirring time lead to smaller porosity and shrinkage. In addition 0,2; 0,25; and 0,3 grams dispersant, the resulting porosity in the range of 63,85-70,78%; 58,74-70,35%; and 53,42-69,66%. Shrinkage 39,43-53,71%; 27,75-50,68%; and 13,61-41,25%. Compressive strength 0,61-1,05 MPa; 2,88-3,81MPa; and 0,52-2,96 MPa. The macroporous and microporous average pore sized was 50 µm dan 5 µm.

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Fadli, Ahmad, Prihartini Widiyanti, Deni Noviana, Agung Prabowo i Heni Ismawati. "Preparation of Hydroxyapatite Scaffold using Luffa Cylindrica Sponge as Template". Jurnal Rekayasa Kimia & Lingkungan 15, nr 2 (17.08.2020): 62–70. http://dx.doi.org/10.23955/rkl.v15i2.15957.

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Hydroxyapatite (HA) scaffold has been widely applied in the biomedical field especially for bone implants. The purpose of this research is to determine the influence of dispersant addition and stirring time on HA scaffold which formed using gambas sponges as a template. HA slurry was made by mixing 10 grams of HA, 12 grams of aquadest, 0,2; 0,25; 0,3 grams of Darvan 821A and 1 gram of sago. The slurry was impregnated into Luffa cylindrica sponges. The sample then dried at 110oC for 3 hours. The green bodies were burned at 600oC for 1 hour and followed by sintering at 1250oC for 1 hour. The results showed that the addition of dispersant and increasing of stirring time lead to smaller porosity and shrinkage. In addition 0,2; 0,25; and 0,3 grams dispersant, the resulting porosity in the range of 63,85-70,78%; 58,74-70,35%; and 53,42-69,66%. Shrinkage 39,43-53,71%; 27,75-50,68%; and 13,61-41,25%. Compressive strength 0,61-1,05 MPa; 2,88-3,81MPa; and 0,52-2,96 MPa. The macroporous and microporous average pore sized was 50 µm dan 5 µm.

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37

Vitale-Brovarone, Chiara, Francesco Baino, Germana Martinasso, Rosangela Canuto, Francesco Bassi i Enrica Verné. "Glass-Ceramic Scaffolds and Shock Waves Effect on Cells Migration". Key Engineering Materials 361-363 (listopad 2007): 233–36. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.233.

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Glass-ceramic scaffolds for bone grafting have been prepared using the sponge replication method and a highly bioactive silica based glass belonging to the system SiO2-P2O5- CaO-MgO-Na2O-K2O (CEL2). The parameters for the sponge impregnation were optimized in order to obtain a continuous coating of the polymeric skeleton which will lead, after the polymeric phase removal, to a resistant macroporous glass-ceramic template. A complete characterization was carried out on the obtained scaffold in order to assess its morphology and specifically its porosity and the degree of pores interconnection. A human osteoblasts cells line (MG-63) was cultured onto the scaffold and the effect of stimulation with shock waves on the cell ability of colonizing the scaffold was investigated.

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Turco, A., C. Malitesta, G. Barillaro, A. Greco, A. Maffezzoli i E. Mazzotta. "A magnetic and highly reusable macroporous superhydrophobic/superoleophilic PDMS/MWNT nanocomposite for oil sorption from water". Journal of Materials Chemistry A 3, nr 34 (2015): 17685–96. http://dx.doi.org/10.1039/c5ta04353k.

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Fabrication of porous magnetic nanocomposite based on PDMS and Multiwalled carbon nanotubes via a low cost and facile hard template approach is proposed for the first time. The sponges exhibited selective oil uptake capacity, excellent mechanical properties and reusability making them useful for plugging oil leakage.

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Teixeira, S., M. P. Ferraz i F. J. Monteiro. "Three Dimensional Macroporous Calcium Phosphates Scaffolds for Bone Tissue Engineering". Microscopy and Microanalysis 15, S3 (lipiec 2009): 61–62. http://dx.doi.org/10.1017/s1431927609990766.

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AbstractBone tissue engineering is a promising area that aims at developing implants capable of repairing and/ or substituting damaged or lost bone tissue. Ceramics are widely used for bone tissue engineering purposes and in this study, hydroxyapatite porous scaffolds were produced using the polymer replication method. With this method, it was possible to obtain scaffolds with specific demands adequate to tissue engineering purposes namely: macroporosity, microporosity and interconnected porosity. Polyurethane sponges were used as templates and impregnated with a ceramic slurry at different ratios being afterwards sintered following a specific thermal cycle. The characteristics of the hydroxyapatite porous scaffolds were investigated by using scanning electron microscopy and micro computer tomography (μ-CT). Human bone marrow cells (HBMC) were isolated and cultured on the scaffolds for 28 days and SEM was used as a tool to assess cell morphology and distribution.

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Xie, Xing, Meng Ye, Liangbing Hu, Nian Liu, James R. McDonough, Wei Chen, H. N. Alshareef, Craig S. Criddle i Yi Cui. "Carbon nanotube-coated macroporous sponge for microbial fuel cell electrodes". Energy Environ. Sci. 5, nr 1 (2012): 5265–70. http://dx.doi.org/10.1039/c1ee02122b.

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Stejskal, Jaroslav, Irina Sapurina, Jarmila Vilčáková, Petr Humpolíček, Thanh Huong Truong, Mikhail A. Shishov, Miroslava Trchová i in. "Conducting polypyrrole-coated macroporous melamine sponges: a simple toy or an advanced material?" Chemical Papers 75, nr 10 (17.07.2021): 5035–55. http://dx.doi.org/10.1007/s11696-021-01776-8.

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Bajpai, A. K., i D. D. Mishra. "Adsorption of fibrinogen onto macroporous, biocompatible sponges based on poly(2-hydroxyethyl methacrylate)". Journal of Applied Polymer Science 102, nr 2 (2006): 1341–55. http://dx.doi.org/10.1002/app.24127.

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Shuahua, Hou Wensheng Wang, Wei Meixia, Xu Qiaoli i Niu Mei. "The Comparison Of Different Activation Techniques To Prepare Activated Carbon Materials From Waste Cotton Fabric". Autex Research Journal 17, nr 3 (26.09.2017): 287–94. http://dx.doi.org/10.1515/aut-2016-0026.

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AbstractIn this paper, we investigate on the preparation of waste cotton fabric-based activated carbons by different methods. Two different kinds of carbon materials are prepared from waste cotton fabric, the structure and properties were characterized using instrumental analyses such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). It is revealed that the products prepared using one-step process are composed of macroporous carbon network , which looks like sponge-type morphology, and exhibit the high values of qiodine(1,198 mg/g) and qmb(235.6 ml/g), showing their potential usage as adsorbent.

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Chaari, Kamel. "Elaboration And Characterization Of Macroporous Bioceramics Using Polymeric Sponge Replication Method". Advanced Materials Letters 11, nr 11 (1.11.2020): 20111578. http://dx.doi.org/10.5185/amlett.2020.111578.

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Guo, Li-Ping, Qing-Tao Hu, Peng Zhang, Wen-Cui Li i An-Hui Lu. "Polyacrylonitrile-Derived Sponge-Like Micro/Macroporous Carbon for Selective CO2 Separation". Chemistry - A European Journal 24, nr 33 (17.05.2018): 8369–74. http://dx.doi.org/10.1002/chem.201800631.

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Choudhary, Abhisek, Swadesh K. Pratihar, Ashish K. Agrawal i Shantanu K. Behera. "Macroporous SiOC Ceramics with Dense Struts by Positive Sponge Replication Technique". Advanced Engineering Materials 20, nr 3 (9.11.2017): 1700586. http://dx.doi.org/10.1002/adem.201700586.

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Soffer-Tsur, Neta, Dan Peer i Tal Dvir. "ECM-based macroporous sponges release essential factors to support the growth of hematopoietic cells". Journal of Controlled Release 257 (lipiec 2017): 84–90. http://dx.doi.org/10.1016/j.jconrel.2016.09.021.

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Bloesser, André, Jana Timm, Hannah Kurz, Wolfgang Milius, Shusaku Hayama, Josef Breu, Birgit Weber i Roland Marschall. "A Novel Synthesis Yielding Macroporous CaFe 2 O 4 Sponges for Solar Energy Conversion". Solar RRL 4, nr 8 (19.02.2020): 1900570. http://dx.doi.org/10.1002/solr.201900570.

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Wang, Jing, Mu Qin Li, Xiang Cai Meng i Guang Wu Wen. "Preparation and Characterization of the Porous Hydroxyapatite/Silk Fibroin Composite Scaffolds with Interconnected Ducts". Key Engineering Materials 368-372 (luty 2008): 1190–93. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1190.

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Porous hydroxyapatite (HA) bioceramic matrix with interconnected ducts was obtained using a porogen burnout technique at 1200°C. The HA/silk fibroin (SF) composite scaffolds were developed with the SF sponges formed inside the pores and ducts of the bioceramics by first introducing HA/SF slurries into the pores and ducts followed by a freeze-drying process. Phase components and morphology of materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Porosity was measured by Archimedean method. Compressive strength was also measured. The simulated body fluids (SBF) experiments were conducted to evaluate bioactivity. The results show that hydroxyapatite is the main phase compositions after sintering at 1200°C. The porosity of composite scaffolds reaches 70%~80%. The sizes of pores and ducts of HA matrix range from 150μm to 400μm and the pore sizes of SF sponges formed inside the macroporous structure of bioceramics are approximately 100μm,a structure favorable for bone tissue in-growth. The compressive strength of the composite scaffolds is greatly improved in comparison with that of HA matrix. In the SBF tests, a layer of randomly oriented apatite crystals form on the scaffold surface after sample immersion in SBF. The cell culture experiments show that the osteoblast cells are attached and proliferated on the surface of the composite scaffold, which suggest good bioactivity and cellular compatibility of the composite material.

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Stejskal, Jaroslav, Michal Pekárek, Miroslava Trchová i Zdeňka Kolská. "Adsorption of organic dyes on macroporous melamine sponge incorporating conducting polypyrrole nanotubes". Journal of Applied Polymer Science 139, nr 20 (11.01.2022): 52156. http://dx.doi.org/10.1002/app.52156.

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