DESALINATION
·
2021
·
IF 9.501
Congcong Liu,Xingtao Zuo,Qiyuan Wu,Juan Xiong,Jiajie He,Yun Zhou,Cong Ma,Zhongbing Chen,Shuili Yu
Ultra-thin loose thin-film composite (TFC) nanofiltration membrane with potential high permeability is an urgent need in water purification . However, its tailor-made structure and morphology remains a challenge. Herein, a novel composite membrane was proposed for the first time by introducing 3,5-diamino-1,2,4 triazole (GAZ) and piperazine with trimesoyl chloride (TMC) into polyamide layer. The physic-chemical properties of the membranes prepared with various GAZ concentrations in the aqueous phase were characterized. GAZ-incorporated membranes had a thinner active layer and larger pore sizes as well as smoother surface morphology with increasing GAZ content. The presence of GAZ made the pure water permeance of the membranes 2.3-folds of the typical TFC membrane without GAZ, up to 30.5 LMH/bar with a comparable Na 2 SO 4 rejection of 93.5%. The membranes fabricated with a higher GAZ fraction exhibited superior removal for the dyes of Rose bengal (>99.6%) and Congo red (>97.5%) with the dye permeance over 23.0 LMH/bar, and higher rejection rates for natural organic matters (>98.5%, >98.0% and >93.0% for sodium alginate , bovine serum albumin and humic acid , respectively). The membranes with stable operation implied their potential applications in water desalination and purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2015
·
IF 4.152
Yi Xia,Chong Cheng,Rui Wang,Chao He,Lang Ma,Changsheng Zhao
Effective and robust anti-bioadhesion ultrafiltration membranes were fabricated in this paper via physically blending of anti-bioadhesion microgels. The microgels were synthesized by one-step cross-linking of antifouling segment, poly(ethylene glycol) methacrylate (PEGMA), and electrostatic repulsion segment, methylacrylic acid (MAA). Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) results indicated that large amounts of PEGMA and MAA polymers had been enriched on the membranes surface. Scanning electron microscope (SEM) indicated that the spherical PEGMA-MAA (PM) microgels might form interpenetrating structure with the membrane matrixes, and substantially increased the pore size of the membranes. Water contact angle (WCA), pore size distributions and ultrafiltration tests suggested that the hydrophilicity, porosity, water flux, and antifouling property for the modified membranes were significantly enhanced. More importantly, systematic anti-adhesion investigations of plasma proteins, platelets, bacteria and vein endothelial cells confirmed that the modified membranes owned strong resistance capability to the bioadhesion of various organisms. The results revealed that highly robust and effective anti-bioadhesion ultrafiltration membranes could be prepared via the proposed blending of PM microgels with membrane matrix, thus this approach should be potential in various biomedical or industrial filtration fields where anti-bioadhesion properties were highly demanded.
研究领域:
材料科学
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生物医学工程
·
化学工程
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Pan Wang,Yang Xiang,Haipeng Yan,Lingsha Li,Zixin Zhao,Liang Xiang,Haoqian Guo,Ying Li,Kui Li,Zhongxiang Bai,Xulin Yang
Solar-driven interfacial steam generation (SDIE) system has emerged as an innovative technology for fresh water production, especially in desalination. Therefore, efficient, reusable, and environmentally sustainable SDIE evaporators are being developed. In this study, a novel multi-layer interfacial evaporator was constructed by combining a polyaniline-modified (PANI-modified) membrane, a loofah sponge, and foam. In this system, the PANI-modified membrane, acting as a photothermal layer, was synthesized via in-situ polymerization on an electrospun nanofiber composite membrane composed of carbonized loofah (CL) powder and polyacrylonitrile (PAN), achieving higher efficiency for fresh water production. In addition, the loofah sponge served as a connecting layer due to its net-like structure, anchoring the upper photothermal layer to the lower foam supporting layer, thereby insulating them from each other. Finally, the support foam layer was formed in-situ with Polyamide 6 (PA6) doped with bamboo charcoal (BC) at the bottom of the connecting layer. The as obtained PA6-BC supporting layer provided functions such as structural support, heat insulation, and contaminant adsorption. This system achieved a deionized water evaporation rate of 1.799 kg m −2 h −1 under 1 sun illumination, and 1.675 kg m −2 h −1 in 3.5 wt.% NaCl solution. Moreover, the system exhibited a high adsorption rate of methylene blue (MB) dye pollutant. The multi-layer interface evaporator also demonstrated excellent salt resistance and stability. These features showcase the novelty of the designed multi-layer interface evaporator and demonstrate the feasibility of applying a multi-layer interface evaporator in photothermal evaporation water treatment.
研究领域:
能源技术
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材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yang Yang,Lei Huang,Yongshi Huang,Mahmud Sakil,Kaige Dong,Jingxin Yang,Wei Zhang,Gaosheng Zhang,Mengmeng Jia,Zhu Xiong
Accumulation of pollutants poses significant challenges to advanced membrane process, impacting efficiency and increasing operational costs. Fulvic acid and its analogues, widely distributed natural organic compounds, degrade water quality and produce by-products in traditional water treatment processes. The presence of even trace heavy metals in water, at the same time, can have a long-term impact on human health. Addressing these issues, we developed a novel TiO 2 -polydopamine (PDA) modified polyvinylidene fluoride (PVDF) membrane (TiO 2 -PDA@PVDF) through an environmental-friendly and low-cost sol-gel method. The membrane features dense nano-TiO 2 coverage, facilitated by a crosslinked dopamine layer, enabling in-situ growth of a functional TiO 2 layer via hydrothermal treatment. This hybrid membrane demonstrates superior adsorption, permeation, and photocatalytic self-cleaning capabilities. Performance analysis demonstrates over 90 % removal efficiency for humic acid and 85–95 % for heavy metals (Tl + , Sb 3+ , and Cr 6+ ). During humic acid separation, the initial flux of nano-TiO 2 membrane was 432 L/m 2 ·h, however, the flux attenuation (63 %) was smaller than unmodified membrane (91 %). Notably, the membrane maintained a flux loss ratio of less than 10 % after multiple operations and self-cleaning cycles, showcasing its robustness and sustainability. The TiO 2 -PDA@PVDF membrane not only effectively intercepts and adsorbs contaminants but also recovers its performance through photo-regeneration facilitated by trace hydrogen peroxide and UV light. These results highlight the membrane's potential for sustainable water purification, presenting a promising solution for both fouling mitigation and enhanced efficiency.
研究领域:
环境科学
·
材料科学
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2018
·Vol. 37
·期 5
·493-499
·
IF 2.016
Dong Li,Liu Xiang-Dong,Xiong Zheng-Rong,Sheng De-Kun,Zhou Yan,Yang Yu-Ming
Herein, excellent UV-absorbing poly(vinylidene fluoride) (PVDF) membranes were fabricated through the pre-irradiation induced graft polymerization method. The PVDF chains irradiated with 60 Co γ -ray were modified with the polymerizable UV absorber 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2 H -benzotriazole (RUVA-93). The influences of irradiation dose and monomer concentration on the prepared PVDF-g-PRUVA-93 membranes were investigated, and the optimal condition was eventually obtained. The chemical structures of the films were studied by 1 H-NMR, FTIR, and XRD. UV light transmittance and DSC tests were used to characterize the UV-absorbing performance and thermal property of the PVDF films before and after modification. The results proved that the PRUVA-93 side chains were successfully incorporated into the PVDF main chains and the obtained PVDF- g -PRUVA-93 films possessed remarkable UV-absorbing property. The modified membrane made under the optimized experiment condition could completely block the UV light in the range of 200−387 nm. Additionally, the transmittance of the PVDF- g -PRUVA-93 film could be reduced to 0.04% in 280−320 nm, where the light irradiation could damage polymer materials most seriously.
研究领域:
高分子材料科学
·
辐射化学
·
功能薄膜材料
·
紫外线防护
·
膜科学与技术
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fengqin Li,Yang Zhou,Yuxue Hu,Xiaoming Feng,Guizhong Tian
Marine biofouling is a significant threat to the economic efficiency and sustainable development of global marine industries. Conventional antifouling coatings, which rely on a single antifouling mechanism, struggle to adapt to complex marine environments. The challenge of seamlessly integrating multi-level antifouling strategies into coatings through a facile approach remains unresolved. This study innovatively developed a super slippery drug-loaded nanofiber composite coating with dynamic interfacial regulation capabilities through an integrated electrospinning-electrospray in situ process. A biodegradable polymer, poly(ε-caprolactone) (PCL), served as the electrospinning base material, into which the eco-friendly antifoulant DCOIT (4,5-dichloro-2-n-octyl-4-isothiazolin-3-one) was incorporated during fiber formation, constructing a porous drug-loaded nanofiber matrix. Concurrently, in situ electrospray was employed to dynamically deposit silica (SiO₂) nanoparticles onto the nanofiber surfaces, forming a modified porous matrix. Subsequent infusion of lubricant oil produced a super slippery drug-loaded modified film (SSLID). The modified film demonstrated excellent hydrophobicity and antifouling performance, achieving synergistic multi-level antifouling effects. This fabrication strategy provides an efficient and adaptable approach for developing functional composite coating films, offering broad application prospects in marine antifouling technologies.
研究领域:
海洋科学
·
材料科学
·
表面工程
·
纳米技术
·
环境科学
·
高分子科学
·
生物技术
✓ 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）