POLYMER COMPOSITES
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2025
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IF 4.7
Tengyang Zhang,Jie Fei,Jifeng Yan,Zhaoxi Gou,Peng Cheng,Lehua Qi
At low temperature (−60°C), increased brittleness and surface grease adhesion promote significant adhesive wear in the composites. 1H,1H,2H,2H-perfluorooctane trichlorosilane (PFOTS) was coated onto carbon fibers to enhance the tribological performance at low temperature of the composites. Compared to the original material, the shear strength of the modified sample was increased by 31.9% to 20.16 MPa, while the wear rate under −60°C was decreased significantly by 87.5% to 1.72 × 10 −8 cm 3 /J. The low-temperature adhesive wear mechanisms were first revealed by combining experimental measurements with molecular dynamics simulations, and the simulations further clarified how a PFOTS coating modifies the tribological response of the material.
研究领域:
材料科学
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复合材料工程
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表面科学
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摩擦学
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低温工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 11
·1606-1615
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IF 4.803
Liu Zihan,Luo Yang,Ning Lianchao,Liu Yong,Zhang Ming
The increasing applications of seawater desalination technology have led to the wide usage of polyamide reverse osmosis membranes, resulting in a large number of wasted reverse osmosis membranes. In this work, the base nonwoven layer of the wasted reverse osmosis membrane was successfully modified into the hydrophobic membrane via surface deposition strategy including TiO 2 and 1H,1H,2H,2H-perfluorooctyltrichlorosilane (PFOTS), respectively. Various techniques were applied to characterize the obtained membranes, which were then used to separate the oil—water system. The optimally modified membrane displayed good hydrophobicity with a contact angle of 135.2° ± 0.3°, and its oil—water separation performance was as high as 97.8%. After 20 recycle tests, the oil—water separation performance remained more than 96%, which was attributed to the film adhesion of the anchored TiO 2 and PFOTS layer on the surface. This work might provide a new avenue for recycling the wasted reverse osmosis membrane used in oily wastewater purification.
研究领域:
环境工程
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材料科学
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水处理
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Xinyu Yao,Xianbo Hou,Guocheng Qi,Rubing Zhang
Super-wetting fibrous membranes have been widely researched for the separation of oil-water mixtures and light oil-water emulsions. However, reusable oil-water separation membranes for heavy oil with high viscosity and high density have proved to be extremely challenging. Herein, superhydrophobic, flexible, and foldable polyimide (PI) nanofiber membranes for heavy oil separation were prepared by using electrospinning method combined with surface modification to build a stable nano-scale roughness on the fiber surface. The results demonstrated that the fibrous membranes modified by fumed silica and 1H, 1H, 2H, 2H-perfluorooctyl trichlorosilane(PFTS) not only had excellent mechanical robustness, but also achieved both ultra-high oil-water selectivity and separation performance. The as-prepared PI fibrous membranes showed the ultra-high gravity-driven light/oil-water emulsion separation flux of 3904.7 L m −2 h −1 and 22474.7 L m −2 h −1 with and without emulsifier stabilization, and the flux of heavy oil can reached 271.36 L m −2 h −1 under 25KPa. The mechanically robust and reusable PI fibrous membranes with high efficient oil-water emulsion and heavy oil separation performance exhibit great potential for practical applications for oily wastewater and oil spill treatment.
研究领域:
材料科学
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环境工程
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiang-Tao Xuan,Hui Zhang,Hong-Li Wang,Jia-Le Yao,Jun Xu,Qiu-Ling Che,Yi Wang
Superhydrophobic textiles based on cellulose, a key biological macromolecule, are highly desirable for applications in extreme environments. In this study, we develop a multifunctional cellulose-based cotton fabric ( Gossypium hirsutum L.) by applying a facile one-step hydrothermal coating method, integrating covalent organic frameworks (COFs), silica nanoparticles (SiO 2 ), and perfluorooctyltrichlorosilane (POTS) onto the fiber surface to form a robust CF-COF/SiO 2 /POTS composite coating. The hierarchical micro/nanostructure modifies the cellulose surface, achieving a water contact angle of 155.4 ± 0.9° and a sliding angle of 7.9 ± 0.7°. Modern analytical techniques, including Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy, confirm the molecular interactions between cellulose and the coating, revealing enhanced surface stability. The coated cellulose fabric exhibits robust chemical stability across acidic (pH 2), alkaline (pH 12), and saline (1 mol/L NaCl) conditions, mechanical durability after 50 adhesion-peeling cycles, five laundering cycles, and 820 h of sunlight exposure, and effective anti-icing behavior with reduced ice adhesion and rapid superhydrophobicity recovery post-icing (−18 °C, 12 h) via mild heating (60 °C, 5 min). Notably, the fabric undergoes an irreversible color change under UV–visible irradiation (300–1100 nm, 133.4 mW/cm 2 ), with spectroscopic analyses indicating photochemical oxidation of hydroxyl groups, yet retaining superhydrophobicity. This work presents a novel strategy for functionalizing cellulose-based textiles, offering durable self-cleaning, anti-icing, and photochromic properties for applications in protective clothing, outdoor gear, and anti-counterfeiting systems.
研究领域:
材料科学
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纺织工程
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表面化学
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纳米技术
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功能涂层
·
智能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）