JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Kaili Jin,Liujun Pei,Zaisheng Cai,Yudie Zhou,Xiner Zhang,Yaping Zhao,Hongjuan Zhang,Qun Yang,Shuaitong Liang,Jiping Wang
Smarting gating microfiltration membranes that can adjust the pore size according to the composition of the wastewater are expected to solve the problem of membrane's limited adaptability to complex oily wastewater. However, the design of a responsive adjustment system capable of manipulating micropore sizes and constant wettability remains a dilemma. Herein, an innovative fiber-based membrane (named PAN/PNIPAm-CF/MWCNT/FeOOH) was developed by skillful introducing poly (n-isopropylacrylamide) (PNIPAm) microgels into the porous channel of the sieve layer. By controlling the physical collapse of PNIPAm microgels, the micro-sized pores have been successfully reversibly adjusted from small size at room temperature to large size when exposed to high temperature, while not changing their wettability. Under a flux conversion rate of more than 200 %, the PAN/PNIPAm-CF/MWCNT/FeOOH membrane could quickly pretreat complex oily wastewater discharged from production lines with high temperature (removal of large oil droplets), then carry out in-depth purification at low temperature (removal of emulsified oils, metal ions, dye micelles, etc.). Besides, the PAN/PNIPAm-CF/MWCNT/FeOOH membrane showed good stability and resistance to harsh environment during long-term filtration. Thereby, the design of fiber-based membranes with micropore smart control capability and constant wettability provides innovative ideas for industrial complex oily wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
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2017
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IF 3.833
Rui Chen,Ning Ren,Xin Jin,Xinyuan Zhu
Poly(N-isopropylacrylamide) (PNIPAM)-based ionic microgels with different diameters were first prepared and then used as particulate stabilizer or seed in dispersion polymerization of styrene. The role of PNIPAM-based ionic microgels could be transformed from particulate stabilizer to seed by controlling the water content in methanol–water mixture. Generally, PNIPAM-based ionic microgels served as particulate stabilizer in methanol in the absence of water, leading to the formation of spherical polystyrene nanoparticles. However, they turned into seeds when water was added into the methanol solution, with the formation of octopus-like nanoparticles. Further study demonstrated that the mechanism for this role transition was related to the special thermosensitivity of PNIPAM microgels in methanol–water mixture. They lost their thermosensitivity in pure methanol solution but restored their thermosensitivity when increasing the water content in methanol–water mixture.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Ziqing Zhao,Xiaoliang Ma,Rui Chen,Hui Xue,Jiehua Lei,Hui Du,Zexin Zhang,Hong Chen
Because of the excellent film-forming ability of poly(N-isopropylacrylamide) (PNIPAM) microgel and high-efficient bactericidal property of quaternary ammonium salt (QAS), QAS-based PNIPAM (QAS-PNIPAM) microgels are synthesized and employed to modify the surface of a range of commonly used materials including metal, plastic, and elastomer. Bacterial culture is carried out on such QAS-PNIPAM microgel-modified surfaces to examine the viability of the attached bacteria. It is found that the bactericidal efficiency is nearly 100% on the modified surfaces of all the studied materials. We attribute the high-efficient bactericidal performance of QAS-PNIPAM microgel film to the QAS component rather than the topography of the microgel film itself. In addition, the microgel film is robust and shows great integrity even after culture of the bacteria and repeated rinses, and the cell experiment demonstrates that this microgel film is cyto-compatible. Therefore, such a simple, versatile method of preparing antibacterial films paves the way for future bactericidal applications.
研究领域:
材料科学
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生物医学工程
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Yu Wang,Fang Zhao,Jie Wang,Ali Raza Khan,Yulin Shi,Zhang Chen,Kaiqiang Zhang,Li Li,Yanfeng Gao,Xuhong Guo
VO2/PNIPAm hybrid thermochromic material has been verified as promising to improve optical performance of smart windows. However, VO2 can be easily oxidized especially when being dispersed in the hydrogel matrix, and also the nonuniform dispersion of VO2 in a host will worsen the material’s optical performance. Herein, pure VO2(M)@SiO2 nanoparticles (NPs) were first prepared using a surfactant-free method. Then VO2(M)@SiO2/PNIPAm hybrid microgels were synthesized through suspension polymerization. The VO2(M)@SiO2 NPs in the hydrogel matrix exhibited obviously improved resistance to oxidation. Monodispersed hybrid microgel with uniformly distributed VO2(M)@SiO2 NPs (Sample I) was obtained. Meanwhile, compared with the best VO2 film reported, our composite microgel (Sample III) demonstrated a 164% increase in the solar modulating ability at a relatively high average luminous transmittance (38.4%). All these remarkable features of VO2(M)@SiO2/PNIPAm microgel synthesized in our work will help a lot in the practical application of the inorganic–organic hybrid nanothermochromic materials.
研究领域:
材料科学
·
化学工程
✓ 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）