TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Yaohui He,Zhaozhu Zhang,Yanling Wang,Meng Liu,Chaoying Liao,Junya Yuan,Peilong Li,Mingming Yang,Weimin Liu
Developing high-performance fabric composites with comprehensive properties is of paramount importance to broaden their application areas. In this work, a novel technique was studied to enhance interfacial adhesion via the adsorption of the complex amphiphilic biopolymer protein onto the surface of PPS/PTFE fabrics. Additionally, WS 2 @Ti 3 C 2 nanohybrids with heterostructures were synthesized, and the distinctive hierarchical microstructure facilitated the multiple reinforcement of the fabric composites. The results suggest that the decoration of BSA offers reaction sites with the phenolic resin and enhances the interfacial performance. Compared to the pure hybrid fabric composites, the tensile and bonding strength of the reinforced hybrid fabric composites are increased by 35.91% and 68.51%. Moreover, the wear rate of the reinforced hybrid fabric composites is decreased by 59.3%.
研究领域:
材料科学
·
生物学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yuzhu Wang,Le Zhao,Feng Zhang,Kai Yu,Chunyu Yang,Jingjing Jia,Wei Guo,Jingxiang Zhao,Fengyu Qu
Solar-driven water evaporation is a promising solution to water pollution, the energy crisis, and water shortages. However, the approach in which the photothermal film is in direct contact with bulk water for water evaporation may lead to a large amount of heat loss, thereby reducing the light-to-heat conversion efficiency (η) of the photothermal film. Here, a highly efficient solar-driven water evaporation system was developed using a Co–Sn alloy-deposited Teflon (PTFE) film (Co–Sn alloy@PTFE) and super-absorbent polymers (SAPs) supported with a floating foam substrate. The Co–Sn alloy with full-spectrum (200–2500 nm) absorption characteristics is devoted to high light-to-heat conversion, while the porous PTFE with high mechanical performance can support the Co–Sn alloy. We used density functional theory to prove that the Co–Sn alloy had a strong adhesive force with PTFE without surfactants due to the high adsorption energy between the (101) crystal plane of the Co–Sn alloy and the hydroxyl group on the PTFE film. Importantly, via the SAP-based “water pump” design, we improved the η of the Co–Sn alloy@PTFE film to 89%, mainly because the SAP not only effectively performed water transportation but also markedly reduced the heat loss of the Co–Sn alloy@PTFE film. Our work highlights the strong potential of Co–Sn alloy@PTFE-based light-to-heat conversion systems for realizing highly effective solar energy-driven water evaporation.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Lina Chi,Yingjia Qian,Junqiu Guo,Xinze Wang,Hamidreza Arandiyan,Zheng Jiang
Membrane fouling due to superhydropobicity of polytetrafluoroethylene ultrafiltration membranes (PTFE UFMs) represents a grand challenge for their practical applications in diverse water treatment industries. Surface immobilisation of hydrophilic and chemically stable inorganic metal oxides (TiO 2 , ZrO 2 , etc) has been developed to improve hydrophilicity of the PTFE UFMs, though they still suffer from expensive and repeating regenerations once fouled. To address such issues, we strive to firmly immobilize g-C 3 N 4 modified TiO 2 (g-C 3 N 4 /TiO 2 , hereafter CNTO) onto PTFE UFM via a facile plasma-enhanced surface graft technique using polyacrylic acid (PAA) as a bridging agent. As reported here, the obtained CNTO/PAA/PTFE UFM shows much smaller surface water contact angle (WCA) of 62.3° than that of bare PTFE UFM(115.8°), leading to enhanced water flux of 830 L m −2 h -1 in the initial ultrafiltration of modelled waste-water containing methylene blue (MB). The CNTO/PAA/PTFE UFM is highly resistant to fouling in the prolonged filtration of 1000 mg/L bovine serum albumin (BSA) solution, while the fouled CNTO/PAA/PTFE UFM is able to regenerate rapidly under either UV or visible-light irradiation. The enhanced performance of the novel CNTO/PAA/PTFE UFM is reasonably attributed to its high wettability and robust photocatalytic activity of the g-C 3 N 4 /TiO 2 coating that follows different self-cleaning mechanisms under UV and visible light irradiations.
研究领域:
环境科学
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材料科学
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水处理工程
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表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Dianbing Zhou,Yuanyuan Wang,Yingjie Ren,Liang He,Minmin Mao,Lei Cao,Bing Liu,Yasemin Tabak,Atilla Evcin,Dawei Wang,Xiaogang Yao,Kaixin Song
Polymer-ceramic composite substrates have been widely focused and used in recent years due to the 5th generation high frequency and high-speed communication. C 9 H 14 O 3 Si (Z6124) modified Mg 1.99 Ga 0.01 Si 0.99 Al 0.01 O 4 (MGSA) ceramic powder filled with polytetrafluoroethylene (PTFE) composites were prepared by casting and vacuum hot-pressing methods. The surface hydrophobicity of the particles and the interfacial compatibility of the composites were improved by using Z6124 coupling agent. Compared with the pure PTFE, the 55 wt% Z6124 modified MGSA particles filled PTFE composite board showed a high dielectric constant of 3.5 and lower dielectric loss of 9 × 10 −4 @10 GHz as well as a thermal conductivity of 0.734 W/mK, which is three times order than that PTFE @0.2 W/mK. Based on the above experiments, simulations of their dielectric properties and thermal conductivity were carried out with COMSOL Multiphysics. The results show that the 65 wt% MGSA particles construct the best thermal conductivity path filled PTFE composite board, which is consistent with the experimental results. All these properties indicate that Z6124 modified MGSA particle filled PTFE composites are potential materials for microwave substrate applications.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 14
·831
·
IF 2.8
Zhao Tianqun,Zeng Tianrui,Jin Shilei,Li Xiaohui,Yu Zhiqiang
BNT (BaO–Nd 2 O 3 –TiO 2 ) system was modified via doping using sol–gel method, and BNST-Mn/PTFE microwave dielectric composite was prepared by mechanical blending. Scanning electron microscopy (SEM), thermal dilatometer, and split post-dielectric resonator (SPDR) were used to characterize the microstructure, dielectric properties, and thermal properties of the composite materials. The results indicate that as the amount of ceramic filler supplied grows, the agglomeration of fillers becomes more pronounced. At a filler content of 10 wt%, the dispersion of the filler in the matrix resin is relatively uniform. The dielectric constant and dielectric loss of the composites increased, and the bonding ability between the two phases diminished with the increase in filler content. When the mass fraction of the ceramic was increased to 70 wt%, the dielectric constant of the composite was 10.92 and the Q·f value was measured at 3584 GHz. At the same time, the coefficient of thermal expansion (CTE) of the composites reached 23 ppm/°C, which was a good compatibility with the copper foil. Lichtenecker equation, Maxwell–Wagner equation, Jayasundere–Smith equation, and effective medium theory equation (EMT) were used to predict the dielectric constant of the composites. In comparison, the dielectric constant values calculated using the EMT equation were in good agreement with the experimental values, especially at low filling volumes. Also, the simulation results of the thermal expansion coefficient of composite materials using the Lichtenecker equation and its improved form are in good agreement with the experimental values.
研究领域:
材料科学
·
陶瓷与复合材料
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介电材料
·
微波技术
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Wenjie Liu,Penglin Kang,Jinbo Guo,Fengze Cai,Qicong Jiang,Xiaodong Li
In recent years, metal hydrides have been extensively utilized in solid propellants due to their high hydrogen storage density, elevated combustion calorific value, and substantial gas production. However, optimizing and improving the energy release performance of metal hydrides remains challenging. This study prepared high-energy oxidizer 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane/polytetrafluoroethylene (HMX/PTFE) composite particles with enhanced safety using the emulsion-solvent evaporation method. The effect of PTFE content on the morphology of composite particles was analyzed, and their chemical structure, thermal decomposition characteristics, mechanical sensitivity, and oxidation-combustion behavior on metal hydrides were characterized and tested. Experimental results indicate that with 10 % PTFE content, the HMX/PTFE composite particles exhibit a dense surface, regular morphology, and uniform distribution of PTFE and binder around HMX. The crystal structure of HMX in the composite particles retains the β-type form, preserving its favorable application potential. Compared to raw HMX, the composite particles exhibited increased activation energy and critical temperature of thermal explosion by 40.05 kJ·mol −1 and 17.26 K, respectively, and enhanced critical impact and friction values by 4.5 J and 40 N, respectively, demonstrating superior thermal stability and mechanical safety. Combustion experiments demonstrate that HMX/PTFE composite particles serve as an effective high-energy oxidant for TiH₂, providing more stable combustion and energy release compared to raw HMX. The oxidation-combustion mechanism of raw HMX and HMX/PTFE composite particles with TiH₂ is analyzed, offering a potential approach to enhance the combustion stability of novel propellants containing metal hydrides.
研究领域:
含能材料
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推进剂与炸药
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材料科学
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化学工程
·
燃烧技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuxin Zhang,Jiawei Huangfu,Bin Rong,Xiongfei Du,Yang Hu,Xu Zeng,Kaikai Chen,Changkun Ding,Wenping Hu,Kuo Yuan,Qinglin Huang
Aerogel, characterized by ultra-low density and scalable preparation, is extensively utilized in various applications, such as catalysis, adsorption/separation, and thermal insulation. However, the trade-off between durability and flexibility for aerogels remains a fundamental challenge, limiting their further development in harsh and complicated conditions. Herein, we developed a confined Ostwald ripening approach to construct the first example of 3D polytetrafluoroethylene (PTFE) aerogel without additional binders. This aerogel possessed an ultra-low density of 0.042 g·cm −3 , vertically aligned channels, and complex superhydrophobic surface structure, which realized the highest oil flux (5.09 × 10 5 L·m −2 ·h −1 ) in the ultra-fast oil/water separation so far. This excellent performance could be maintained in strong acid, alkaline, corrosive organic, or complicated emulsion solutions. Moreover, this pure PTFE skeleton exhibited a high Young's modulus of 0.08 MPa, an elastic modulus of 5.24 × 10 −4 MPa, and excellent flexibility. Following, the 3D PTFE aerogel was employed in Pickering emulsion bi-phase photocatalysis for highly efficient photocatalyst cycling and product separation. This work not only addresses the inherent poor processability of PTFE but also breaks the trade-off between durability and flexibility for aerogels, which greatly boosts its development in long-term practical applications under harsh and complicated conditions.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
·
催化化学
·
界面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Shun Zhang,Dan Lu,Weifeng Chen,Xinchen Xiang,Danjun Zheng,Jing Wang,Zhikan Yao,Fei Bi,Lin Zhang
Polytetrafluoroethylene (PTFE) hollow fiber membrane holds tremendous potential for the treatment of complex wastewater due to its outstanding chemical and thermal stability. However, its treatment efficiency is often hindered by the low water permeate flux arising from the inherent hydrophobicity of PTFE. Here, we present a gentle and convenient hydrophilic modification method that involves immersion in a nonionic surfactant aqueous solution, followed by dopamine self-polymerization. The nonionic surfactant facilitated the penetration of the dopamine solution into the membrane, where dopamine self-polymerized to form a hydrophilic layer on the surface and inner pores of the membrane. The hydrophilicity-modified PTFE hollow fiber membranes demonstrated an impressive increase in water permeate flux, reaching 10231.4 L m −2 h −1 , nearly ten times that of the original membrane. Even after prolonged exposure to a strong acid solution (pH = 1) or an oxidant solution (1000 mg L −1 NaClO) for two weeks, this membrane still maintained its favorable water permeability. Furthermore, the modified PTFE membranes also exhibited remarkable resistance to fouling by humic acid. These results showcased a straightforward method for designing a hydrophilic layer on PTFE hollow fiber membranes, underscoring their significant potential for real wastewater treatment applications.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2022
·
IF 4.695
Yilong Ren,Kai Gao,Shaojun Ying,Yue Zhao,Lin Zhang,Dan Guo,Guoxin Xie
Although microcapsules can remarkably diminish the friction coefficient and wear rate of the composites, most of the superior tribological properties are achieved under small contact areas and low loads. To enhance the tribological performance of microcapsule-containing composites at large contact areas and high loads, the PTFE is introduced to construct PTFE/microcapsule/epoxy composites. The resulted composites maintain a low coefficient of friction (COF) of 0.057 and a wear rate of 1.45✕10 −7 mm 3 /Nm against PH13–8Mo Steel in ring-on-ring test configuration at 1500 N (12.7 MPa), where the microcapsule/epoxy composite fails to ensure constant and adequate lubrication . The effect of the PTFE content on the mechanical and tribological properties has been methodically examined and discussed in some detail. The analysis results provide evidence that the island-like transfer film associated with the PTFE is essential for the intense enhancement of tribological properties, in which composition is confirmed by exhaustive analysis. The transfer film tends to lessen the solid friction resulting from the direct contact of asperities in mixing or boundary lubrication while the reducing lubricant film failure is essentially caused by high flash temperature. Additionally, the oleophobic properties of the PTFE promote oil lubrication under a limited oil supply. This work aims to extend service conditions and promote applications of microcapsule/epoxy composites in mechanical components.
研究领域:
材料科学
·
机械工程
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Yan Huang,Changfa Xiao,Qinglin Huang,Hailiang Liu,Zhuang Guo,Kaixuan Sun
We proposed a facile and robust strategy for fabricating tubular polytetrafluoroethylene (PTFE) / poly (tetrafluoroethylene- co -hexafluoropropylene) (FEP) ultrafine fibers-covered porous membranes for continuous oil/water separation via electrospinning-sintering method. Specifically, PTFE/FEP/poly (vinyl alcohol) (PVA) ultrafine fibers were electrospun covering on a porous supporting tube which served as the outer layer of the porous membranes. Manipulation of shapes by control of FEP additions enabled the creation of PTFE porous membranes with optimized membrane pore structure during the sintering process. Meanwhile, the obtained membranes had excellent oil/water selectivity in oil/water separation. Moreover, they could effectively separate surfactant-stabilized water-in-oil emulsions with separation efficiency as high as 99.9% and high flux (134 L m −2 ·h −1 at 0.5 bar). Therefore, tubular PTFE/FEP ultrafine fibers-covered porous membranes enabled an efficient separation for various oil/water emulsions, showing attractive potential for practical oil/water separation.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2023
·
IF 20.4
Zhanwei Xu,Yuchuan Ren,Xuetao Shen,Kai Yao,Jiayin Li,Hao Luo,Liang Li,Zhi Li,Jianfeng Huang
Lithium-sulfur batteries attract great interest due to their high energy density, sulfur abundance and environment friendly. However, the shuttle effect of lithium polysulfide and serious capacity fading especially at high sulfur loading remains a challenge for their commercial applications. In this work, we propose a scalable and feasible strategy to construct a flexible host for sulfur and catalyst carrier, in which polytetrafluoroethylene is employed as a precursor and in-situ polymerized into nanofibers to link acetylene black (PTFE NF/AB) through a blend and low temperature (∼ 180 °C) treatment process. The PTFE NF/AB exhibits semi-confined architecture for sulfur accommodation, electrolyte infiltration and electron transformation. Impressively, the electrode achieves a high areal capacity of 14.6 mAh cm −2 at the current density of 4.82 mA cm −2 with a sulfur loading of 20.6 mg cm −2 . Moreover, the PTFE NF/AB architecture can be employed as the catalyst supports. The capacity can be further enhanced to 17.4 mAh cm −2 when MoS 2 fabricated into the PTFE NF/AB using a ball mill approach. Assembled into a pouch cell, the PTFE NF/AB architecture delivers a high capacity of 825.4 mAh g −1 in the folded state, showing its excellent potential in the high-energy flexible territory.
研究领域:
储能技术
·
材料科学
·
纳米技术
·
电化学
·
柔性电子学
✓ 已验证
DOI
高影响因子
OPTIK
·
2020
·
IF 2.187
Xiaoyu Sun,Lei Li,Xiaozhuang Xu,Guanyu Song,Jielei Tu,Pingyuan Yan,Weinan Zhang,Kai Hu
Reflection from the surface of solar panels is important factor to limit the efficiency of all of photovoltaic devices . Antireflective coatings (ARCs) can significantly reduce surface reflections and improve photovoltaic module efficiency. But, ARCs on solar glass, used in photovoltaic (PV) modules, usually located in terrible environments, which demands that ARCs must hinder moisture penetration , abrasion damage, and dirt accumulation. In this study, the films with highly antireflective properties that maintains a high durability and hydrophobic were prepared through a simple sol–gel method by using PTFE (Polytetrafluoroethylene) modified. The average transmittance of glass with ARCs was 97.86 % at 400–800 nm, which was an increase of 7.86 % compared to the bare glass. X-ray Diffraction (XRD), Fourier Transform Infrared spectrometer (FT-IR), field emission scanning electron microscope (FE-SEM), ellipsometer , atomic force microscope (AFM), UV–vis-NIR spectrophotometer and water contact angle analyzer were used to measure the surface composition, morphology, refractive index , surface roughness , optical and hydrophilic properties of the coatings. The results revealed that the deposition of PTFE modified SiO 2 coating on the glass substrate had a significant enhance on the antireflection, abrasion-resistance and hydrophobic property.
研究领域:
材料科学
·
太阳能
·
涂层技术
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）