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Academic literature on the topic 'Macroporus Sponges'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Macroporus Sponges"

1

Petrenko, Yu A., N. A. Volkova, E. P. Zhulikova, L. G. Damshkaln, V. I. Lozinsky, and A. Yu Petrenko. "Choice of conditions of human bone marrow stromal cells seeding into polymer macroporus sponges." Biopolymers and Cell 24, no. 5 (September 20, 2008): 399–405. http://dx.doi.org/10.7124/bc.0007b8.

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2

Obata, Akiko, Megumi Sasaki, and Toshihiro Kasuga. "Preparation of Macroporous Glass-Ceramic Composites Containing β-TCP." Advanced Materials Research 11-12 (February 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, and Ivo Křivka. "Polypyrrole-Coated Melamine Sponge as a Precursor for Conducting Macroporous Nitrogen-Containing Carbons." Coatings 12, no. 3 (March 1, 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, and Lei Yang. "Mechanically Modulated, Ultra-high Precision Logic Delivery of Molecules by Bio-inspired Macroporous Ceramic Sponge." MRS Advances 2, no. 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, and Yeon Tae Yu. "Preparation and Characterization of Macroporous Pumice-Porcelain Composite Foams." Key Engineering Materials 368-372 (February 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, and 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, no. 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, and 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, no. 1 (January 1, 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, and Xiangling Ji. "Preparation and absorption behavior to organic pollutants of macroporous hydrophobic polyvinyl alcohol–formaldehyde sponges." RSC Adv. 4, no. 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, and 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, no. 27 (2015): 14105–8. http://dx.doi.org/10.1039/c5ta03012a.

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10

Cao, Jinfeng, Dengxu Wang, Peng An, Jie Zhang, and 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, no. 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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Book chapters on the topic "Macroporus Sponges"

1

Yan, Jia, An Jie Wang, and Dong Pyo Kim. "Preparation of Silver Metallic Sponge from Macroporous Carbon Template." In Materials Science Forum, 770–73. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.770.

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