JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 18
·47436
·
IF 2.188
Xiuzhen Wei,Xufeng Xu,Jiawei Wu,Cuixia Li,Jinyuan Chen,Bosheng Lv,Baoku Zhu,Hai Xiang
Thin-film nanocomposite (TFN) nanofiltration (NF) membranes with superior properties were prepared using hydrophilic SiO 2 (HGPN-SiO 2 ) nanoparticles as the inorganic modifying monomer by an interfacial polymerization (IP) process. The effects of HGPN-SiO 2 on the morphology and surface properties of the prepared NF membranes were characterized by attenuated total reflectance–Fourier transform infrared spectroscopy, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, surface zeta potential, and static contact angle. The addition of HGPN-SiO 2 can effectively improve the permeate flux of the NF membranes. When the HGPN-SiO 2 concentration in the aqueous phase was 0.08 wt %, the permeate flux of the TFN-NF membrane was twice that of the pure NF membrane. Furthermore, the acid resistance of the TFN-NF membrane was clearly improved with the addition of HGPN-SiO 2 . Under neutral conditions, the TFN-NF membrane showed superior flux and salt rejection stability in a long-running operation. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47436.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 21
·期 2
·655-663
·
IF 2.3
Wang Yutuo,Li Yintao,Zhang Zhengquan,Xiao Mengqing,Chen Changwen,Zhou Yuanlin,Wang Shanqiang
A composite coating with self-embrittlement was prepared using SiO 2 -modified 3-aminopropyltrimethoxysilane and a solution of random copolymer P(PMMA- co -PMAA- co -PTFEMA). The structures and properties of the composite emulsions were determined using Fourier transform infrared spectroscopy, thermogravimetry, X-ray diffractometry, and transmission electron microscopy. The results indicate that the self-embrittlement morphology of the coating can be controlled by adjusting the ratio of MMA/MAA in the random copolymer. Furthermore, the coating exhibits a good decontamination effect on simulated radioactive dust (doped with elemental K).
研究领域:
材料科学
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核技术应用
·
表面工程
✓ 已验证
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2022
·Vol. 301
·期 1
·1-10
·
IF 2.434
Zhao Si,Lv Zaosheng,Lei Yang,Huang Yanfen
Various methods have been exploited to treat oil/water mixtures, but they are not suitable for widespread application due to high cost or low efficiency. Superhydrophobic materials with water-repellent and lipophilic are desirable materials for the separation. Here, composite superhydrophobic coatings, capable of applying to a variety of substrates, were developed using a simple co-blending method of dispersing fumed TiO 2 nanoparticles (NPs) and hydrophobic silica sol into non-fluorinated modified polystyrene resin (MPS). The properties of the coating were investigated by a variety of techniques such as FTIR, FESEM, TG-DSC, and contact angle measurement. The results suggested that the surface had exceptional superhydrophobicity with the WCA as high as 160.8°. The coating remained superhydrophobic after 3 times of sandpaper abrasion. The superhydrophobic surface had excellent self-cleaning properties and could be applied to separate the oil/water mixture. The separation efficiency could be over 96% and remained stable after 5 cycles. It is a great prospect in the treatment of oily wastewater. Furthermore, the reagents and instruments used during the procedure are easily available, so it has the potential for production in large quantities. Graphical abstract The superhydrophobic composite coatings for self-cleaning were fabricated by mixing the non-fluorinated modified polystyrene resin (MPS) and two nanoparticles of TiO2 and SiO2. The superhydrophobic composite coatings could be applied to separate the oil/water mixture. The separation efficiency could be over 96%, and remained stable after 5 cycles.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Han Zeng,Maoqiang Bi,Zhonghe Tong,Yingtai Du,Xi Chen,Tianyan Jiang
In this study, the enhancement mechanism of SiO 2 modified by different silane coupling agents (SCA) on the moisture resistance, thermal properties and electrical insulation properties of epoxy resin (EP) composites is discussed. Through the combination of experimental tests and molecular dynamics (MD) simulations, the performance differences of five systems (EP, SiO 2 -EP, KH550 / SiO 2 -EP, KH560 / SiO 2 -EP, KH570 / SiO 2 -EP) in water absorption, glass transition temperature ( T g ) and volume resistivity are analyzed. The changes of free volume fraction (FFV), interaction energy, number of hydrogen bonds and diffusion behavior of water molecules are revealed from the microscopic point of view. The experimental results show that the introduction of modified SiO 2 significantly improves the moisture resistance, thermal properties and electrical properties of EP. Among them, KH550 modified SiO 2 has the best effect, T g increases by 12.3 %, volume resistivity increases by 22.1 %, and water absorption rate decreases by 21.9 % at 60 °C. MD simulations further confirm that the nano-SiO 2 modified by SCA can effectively limit the diffusion of water molecules and reduce the effect of temperature on the mean square displacement (MSD) of the system. The KH550 / SiO 2 -EP system has the smallest free volume and the highest number of hydrogen bonds, which effectively inhibits the diffusion of water molecules and the movement of molecular chains. This study provides a theoretical basis and material design strategy for the application of epoxy composites in hygrothermal environments.
研究领域:
高分子材料科学
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复合材料工程
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电气绝缘技术
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材料化学
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纳米功能材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）