APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Tianyu Zhang,Xiaoli Yan,Guangda Zhou,Kui Wang,Jingtao Zhang,Hua Zhang,Junjie Guo
Optimizing platinum-based catalysts for hydrogen generation via water electrolysis in pH-universal electrolytes is significant, and modulating the electronic structure is a viable strategy. Herein, platinum-iron (Pt–Fe) alloys with varying composition supported on carbon onions (CNOs) were successfully synthesized: Pt x Fe y @CNOs (x, y = 0.6, 0.4; 0.5, 0.5; 0.4, 0.6). Beneficial from the precisely modulated crystal plane spacing and electronic structure by tuning the Pt/Fe composition, in general pH electrolytes, Pt x Fe y @CNOs display outstanding hydrogen evolution reaction (HER) activity. The as-prepared Pt 0.5 Fe 0.5 @CNOs shows low overpotentials (η 10 ) of 11, 30, and 19 mV at −10 mA cm −2 in 0.5 M H 2 SO 4 , 1.0 M phosphate-buffered saline (PBS), and 1.0 M KOH electrolyte, respectively. Compared to commercial Pt/C, it displays enduring stability up to 24 h. Density functional theory (DFT) calculations indicate that Pt 0.5 Fe 0.5 @CNOs displays the lowest H* Gibbs free energy (ΔG H* ) and water dissociation energy values, due to the suitable proton adsorption and H 2 O dissociation processes offered by its electronic structure. Moreover, it is proven that the support with better wettability has a positive effect on HER performance of the catalyst. The optimal electronic structure and improved wettability provide novel insight into developing a Pt-based HER pH-universal catalyst.
研究领域:
材料科学
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催化化学
·
理论计算
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 13
·4831
·
IF 3.4
Hongbo Liu,Jiajie Huang,Bingzhi Guo
Dopamine was used to modify polytetrafluoroethylene (PTFE) in order to obtain functional polydopamine (PDA) surface-modified PTFE microporous film (PTFE@PDA). Ag was deposited on the surface of PTFE@PDA using electroless plating in order to obtain Ag-wrapped PTFE@PDA film (PTFE@Ag). A liquid-phase chemical reduction method was employed to prepare nickel nanochains. A Ni@PVDF cast film was obtained by mechanically blended nickel nanochains and polyimide (PVDF). The above two films were hot pressed to give a flexible, ultra-thin, and highly effective electromagnetic shielding composite film with a “3+2” layered structure. IR, XRD, and TEM results showed the PTFE@PDA film surface was coated by a tight plating layer of Ag particles with a particle size of 100~200 nm. PTFE@Ag+Ni@PVDF composite film exhibited excellent electromagnetic shielding effectiveness, with the conductivity of 7507.5 S/cm and the shielding effectiveness of 69.03 dB in the X-band range. After a 2000-cycle bending, this value still remained at 51.90 dB. Furthermore, the composite film presented excellent tensile strength of 62.1 MPa. It has great potential for applications in flexible and wearable intelligent devices.Keywords:electromagnetic shielding;Ag;PTFE;composite film
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Xiaoliang Li,Zeyang Yu,Ning Wu,Yue Sun,Xiang Chen,Yue Zhang,Siyao Qin,Xucong Wang,Hao Gong,Zifei Meng,Morten Willatzen,Ning Li,Zhong Lin Wang,Zhenfeng Bian,Xiangyu Chen
Precious metal recovery has become increasingly critical due to resource scarcity, while conventional extraction methods often suffer from low efficiency and pollution problem. Here, this work proposes an efficient and environmentally friendly catalytic strategy based on the integration of contact-electro-catalysis (CEC) and photocatalysis. The composite microsphere catalyst is fabricated by using low temperature co-firing TiO 2 /PTFE particles, which have an average diameter of ≈10 µm and expose both TiO 2 and PTFE active sites on its surface, enabling dual CEC–photocatalytic synergy reactions. Compared to pristine TiO 2 catalyst with similar weight, this composite microsphere catalyst exhibits a tenfold enhancement in gold extraction efficiency from electronic waste. This high-performance leaching system operates under mild conditions, alleviating the need for traditional strong oxidants and offering potential for industrial application. Density functional theory (DFT) calculations further reveal that charge transfer from H 2 O to PTFE and subsequently into TiO 2 , with favorable energy band alignment between PTFE and TiO 2 ensuring efficient carrier hopping and enhanced photocatalytic activity. This composite catalytic strategy based on organic–inorganic microsphere catalysts may be extended to areas like wastewater treatment, organic synthesis, and industrial waste valorization.
研究领域:
材料科学
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环境工程
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催化化学
·
资源回收
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可持续化学
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产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Chenhao Huang,Kaiwen Zhang,Chenxi Zhang,Jing Yan,Hongyuan Fan,Lan Sun,Jun Wang
The extraction and transportation of oil and gas pose significant challenges due to corrosive environments, particularly hydrogen sulfide (H 2 S) exposure. This study investigates the use of polytetrafluoroethylene (PTFE) to enhance the corrosion resistance of nickel‑phosphorus (Ni P) coatings in H 2 S-rich environments. Electroless deposition was employed to prepare Ni-P/PTFE coatings, which were then subjected to simulated H 2 S corrosion tests. Results indicate that the incorporation of PTFE led to a more uniform Ni P coating with reduced porosity, significantly improving corrosion resistance. The coatings exhibited enhanced protective performance by stabilizing corrosion product layers and preventing the formation of corrosion channels. Ni-P-PTFE coatings overcame the existing research challenge of Ni P coatings' corrosion in H2S environments, showing no penetration of the corrosive medium into the substrate after 720 h of immersion. The corrosion rate of the coating is only 0.0261 mm/year, only 4.27 % of the corrosion rate of the L245NS substrate in the early stage of corrosion. Moreover, after characterization by SEM, XRD and XPS, it was found that the presence of PTFE altered the corrosion mechanism, promoting the formation of stable nickel sulfide and oxide layers on the surface. This study sheds light on the mechanisms underlying PTFE-enhanced corrosion resistance in Ni P coatings, offering promising implications for extending the lifespan of equipment in the oil and gas industry.
研究领域:
材料科学
·
腐蚀与防护
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yilong Zhao,Dianbing Zhou,Xiaogang Yao,Minmin Mao,Yingjie Ren,Bing Liu,Hadi Barzegar Bafrooei,Mahdi Feizpour,Peilin Qin,Huixing Lin,Shuqing Song,Kaixin Song
The demand for high-performance dielectric substrates for miniaturized radio-frequency (RF) devices and high-power electronic systems has accelerated the development of polymer–ceramic composites that simultaneously deliver high permittivity, low dielectric loss, and improved thermal conductivity. In this work, γ-aminopropyltriethoxysilane (KH550)-modified Ca 0.60 Sr 0.40 TiO 3 (CST)/polytetrafluoroethylene (PTFE) composite substrates were fabricated through a water-based tape-casting route followed by hot-press lamination, enabling uniform dispersion of CST ceramic fillers within the PTFE matrix. The incorporation of KH550 effectively enhanced interfacial compatibility between the ceramic fillers and the polymer matrix, while systematically increasing CST content improved both dielectric and thermal transport properties. At an optimal CST loading of 60 wt%, the composites exhibited a high relative permittivity ( ε r ) of 11.69 while maintaining a dielectric loss tangent (tan δ ) of 2.16 × 10 −3 at 10 GHz, together with a thermal conductivity ( λ ) of 0.714 W m −1 K −1 , a coefficient of thermal expansion (CTE) of 45.53 ppm K −1 , and an ultimate tensile strength of 15.01 MPa. Finite-element simulations reproduced the experimental trends, indicating that KH550-induced interfacial modification reduces interfacial thermal resistance and facilitates interfacial polarization within the composite system. The resulting CST/PTFE composites therefore exhibit a well-balanced combination of dielectric, thermal, and mechanical properties, highlighting their promising potential as dielectric substrates for high-frequency RF and microwave components in advanced communication technologies such as 5G systems.
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产品关联
DOI
高影响因子
Nano Energy
·
2026
·
IF 16.7
Yunlong Li,Mingming Liu,Guicui Song,Mengran Yu,Junhao Sang,Kun Li,Yongling Wu,Yange Feng
LF-PTFE combines laser-texturing and F-SiO₂ coating for superamphiphobicity. • The SL-TENG outputs 118 V and 33 μA under single DI water droplet impact. • It harvests energy and senses liquid type and ion concentration effectively. • 1D-CNN classification exceeds 97.71%, with anti-icing and de-icing capability. Solid–liquid hybrid triboelectric nanogenerators (TENGs) have attracted considerable attention due to their great potential in sustainable energy harvesting and self-powered sensing. However, their practical applications are still restricted by insufficient output performance, poor durability, and limited environmental adaptability. In this work, we propose a high-performance solid-liquid hybrid TENG based on laser-textured and fluorinated polytetrafluoroethylene (LF-PTFE). By constructing a low-surface-energy F-SiO₂ superamphiphobic interface with hierarchical micro/nanostructures, the surface wettability and droplet-driven electrical output are significantly improved. The fabricated LF-PTFE surface exhibits water and oil contact angles exceeding 150°, achieving excellent superamphiphobic properties. Under the impact of a single deionized water droplet, the device delivers a peak open-circuit voltage of 118 V and a short-circuit current of 33 μA, nearly three times higher than those of pristine PTFE, and maintains stable output even under continuous droplet impacts. The effects of external parameters such as droplet frequency, impact height, incidence angle, dielectric thickness, and landing position on electrical performance are systematically investigated. The device not only efficiently harvests energy to charge capacitors but also functions as a self-powered sensor for liquid type identification and ionic concentration detection. Moreover, the excellent anti-icing and photothermal de-icing properties of the LF-PTFE surface ensure superior operational stability in extreme environments. Furthermore, by integrating the triboelectric signals with a one-dimensional convolutional neural network (1D-CNN) and developing a droplet detection program, high-precision self-powered liquid classification was achieved. This study provides a systematic strategy for the design of multifunctional solid-liquid hybrid TENGs, laying a solid foundation for their application in liquid detection. Download: Download high-res image (192KB) Download: Download full-size image Solid–liquid hybrid TENGs based on laser-textured and fluorinated PTFE were developed for high-performance energy harvesting and self-powered sensing. The LF-PTFE surface with hierarchical F-SiO₂ superamphiphobic structures exhibited water/oil contact angles above 150°, enhanced charge transfer, and delivered 118 V and 33 μA under droplet impact. The device showed stable output, anti-icing/de-icing capability, and enabled liquid classification and ionic concentration detection.
✓ 已验证
DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 11
·2352
·
IF 3.7
Xinggui Lei,Shifeng Liu,Qiuyan Xie,Yue Zhang,Binni Zou,Yuan Yuan
HighlightsPTFE/SiO2–ER/FR superhydrophobic coatings for anti-icing and de-icing of insulators were designed.The micro/nanoscale hierarchical structure imparts good superhydrophobicity to PTFE/SiO2–ER/FR.PTFE/SiO2–ER/FR superhydrophobic coatings achieve good durability against UV irradiation or freeze–thaw cycling.PTFE/SiO2–ER/FR superhydrophobic coatings possess good anti-icing and de-icing performance under natural icing conditions.This work describes the preparation of PTFE (polytetrafluoroethylene)/SiO2(silicon dioxide)–ER (epoxy resin)/FR (fluorosilicone resin) superhydrophobic coatings using the spray method to improve the anti-icing and de-icing performance of transmission line insulators. The coatings exhibit a consistent fluorine distribution (32.86 wt%), which enhances their low surface energy, alongside SiO2nanoparticles that occupy the interstices between PTFE particles, resulting in a dense micro- and nanoscale hierarchical structure. Consequently, the coatings have good superhydrophobicity, featuring a contact angle of 173.9° and roll angle of 1.2°. Following 66 days of UV irradiation, the contact angle remains above 150°, and the roll angle is approximately 15°, accompanied by a slight increase in ice adhesion strength. Following 26 freeze–thaw cycles, the contact angle stabilizes at around 157°, showing good environmental durability. Natural icing studies validate the coatings’ good anti-icing and de-icing efficacy: in comparison to common insulators, the coated insulators demonstrate a 14.2% reduction in ice accretion weight and a 67.7% reduction in maximum ice ridge length.
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Zheng Wang,Enen Qian,Liguo Qin,Yusen Luo,Mingqing Sun,Shan Lu,Mulong Jiang,Guangneng Dong
Improving the adhesion and tribological performance of fabric composite liners remains a critical challenge, particularly under varying temperature conditions. In this study, a combined strategy involving polydopamine-assisted deposition of MAX phase, shot peening of metallic substrates, and incorporation of lamellar MoS 2 was proposed to regulate interfacial structure and friction behavior. The results show that shot-peening-induced regulation of the metallic substrate topography significantly improves liner–substrate adhesion. An intermediate substrate roughness promotes resin infiltration and mechanical interlocking, increasing the peel strength to 1.41 N mm −1 , approximately 2.35 times that of the same MAX@fabric–MoS 2 composite bonded to an untreated substrate. The incorporation of MoS 2 produces a concentration-dependent change in tribological behavior. Among the investigated compositions, 0.5 wt.% MoS 2 yields the lowest mean coefficient of friction (COF) and wear rate, corresponding to reductions of approximately 16% and 15%, respectively, compared with the MAX@fabric composite without MoS 2 . Analysis indicates that an appropriate substrate roughness facilitates resin infiltration and stable interfacial bonding, while excessive roughness induces stress concentration and reduces adhesion. The smoother and more compact worn surface obtained at 0.5 wt.% MoS 2 suggests improved stability of the sliding interface, potentially associated with the development of a lubricious interfacial tribolayer. These findings reveal that adhesion and tribological performance are governed by balanced interfacial roughness and lubricant loading, providing a hierarchical interface-design principle for fabric composite liners. Download: Download high-res image (200KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Wanting Liu,Haibo Lin,Jianqiang Wang,Qiu Han,Fu Liu
Polytetrafluoroethylene (PTFE) hollow fibers are considered as robust membranes for wastewater treatment due to its comprehensive chemical, thermal and mechanical stability. However, the intrinsic strong hydrophobicity impeded its application because of severe organic matter fouling. Therefore, hydrophilic PTFE hollow fiber membrane especially with robust resistance to chemical washing is highly desirable. Herein, we feasibly enhance the chemical washing resistance of hydrophilic PTFE hollow fiber membrane via the interface impregnation and crosslinking of poly (vinylpyrrolidone-vinyltriethoxysilane) (P (VP-VTES)). The hydrophilic crosslinking network (HCN) endowed PTFE membrane with better resistance to BSA, HA and soybean oil fouling compared to ethanol pre-wetted PTFE membrane. More importantly, the HCN modified membrane maintains its hydrophilic and chemical stability after strong acidic (pH = 2), alkaline (pH = 12) and oxidization artificial accelerated cleaning (2000 ppm NaClO) for 2 weeks. Overall, the facile preparation and excellent performance of robust hydrophilic PTFE membrane highlights its great potential in treating highly contaminated wastewater.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
G.D. Lai,H. Niu,K. Li,L. Lu,Y. Cai,Y.L. Bian,H.W. Chai
The deformation and damage mechanisms of aluminum/polytetrafluoroethylene (Al/PTFE) composites under quasi-static compression are critical for aerospace, defense and structural applications, yet their mesoscale behavior remains insufficiently understood. This study combines in situ synchrotron X-ray micro computed tomography (CT) with CT-based finite element method (FEM) simulations to dynamically resolve the interplay between microstructure evolution and mechanical response. Real-time 3D imaging reveals negligible contributions of initial voids to bulk deformation, while catastrophic failure is governed by shear-induced interfacial debonding between Al particles and progressive void coalescence. Mesoscale FEM simulations quantify stress localization on Al particles, demonstrating its dependence on particle alignment relative to the loading direction. Damage initiates exclusively when adjacent particles deviate from the loading direction, underscoring the pivotal role of microstructural heterogeneity. These findings provide new insights into mesoscale structure–property relations in Al/PTFE composites, and the combined methodology of in situ CT experiments and CT image-based FEM simulations offers potential for advancing mechanistic studies of multiphase composites under complex mechanical conditions.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zehang Cui,Chenghong Guo,Guoqiang Li,Yuan Wang,Dongxu Xiao,Haojie Xu,Yiyu Chen,Haoyu Bai,Moyuan Cao
Despite significant advances in oil transport, existing channels remain susceptible to chemical corrosion, resulting in material degradation and eventual functional failure. Here, a biomimetic two-order wedge channel (TOWC) is presented that combines the chemical inertness of polytetrafluoroethylene (PTFE) and the precision of femtosecond laser microfabrication. The TOWC integrates a primary wedge channel with secondary micro-wedge arrays, enabling anti-gravity transport of low-surface-tension (LST) oils at velocities up to 57.9 mm s −1 in air and 15.8 mm s −1 underwater. The enhanced Laplace pressure and capillary rise at the corners, distinct from common single-wedge/grooved structures, are identified as the key driving forces governing LST liquid transport. Notably, the TOWC exhibits exceptional corrosion resistance, retaining over 95% of its transport efficiency after 30 days of immersion in saturated acetic acid and sodium hydroxide, far exceeding the durability of glass, PDMS, and aluminum counterparts. It also demonstrates remarkable abrasion resistance, maintaining stable performance over 200 cycles of sandy impact. Furthermore, the TOWC enables selective separation of immiscible oils with surface tension differences as small as 1 mN m −1 , long-distance transport along reconfigurable pathways, and efficient collection of floating oil droplets. This work offers a durable platform for advanced applications in chemical microreactors, targeted drug delivery, and lab-on-chip systems.
研究领域:
微流控
·
材料科学
·
仿生工程
·
表面科学
·
芯片实验室
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产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2017
·Vol. 58
·期 1
·103-111
·
IF 1.449
Bing Zhou,Zhubo Liu,Bin Xu,A.V. Rogachev,M.A. Yarmolenko,A.A. Rogachev
Polytetrafluoroethylene (PTFE) composite coatings doped with copper acetate and polyethylene (PE) were fabricated on rubber substrate by electron beam dispersion technique. The effects of dopant nature and glow discharge treatment on morphology, structural and tribological properties of the coatings were investigated. The results showed that Cu and PE doping change the surface structure of PTFE-based composite coatings due to the chemical reactions between the dispersion products. Cu-PE-PTFE coatings show the columnar and layered growth models without and with discharge treatment. Cu adding decreases the crystallinity, branched degree and unsaturated degree of PE coatings, but increases the branched degree and unsaturated bonds in the PE-PTFE coatings. Glow discharge enhances the crystallinity and ordering degree of composite coatings. Friction experiments indicated the significant difference of composite coatings in the nature of their destruction during friction. PE-PTFE coating is characterized of the brittle fracture with clear failure boundaries but Cu-PE-PTFE coating shows a rough surface without cracking and delaminating after friction. Cu doping increases the dynamic coefficient of friction of PE and PE-PTFE composite coatings, but discharge plasma decreases the dynamic coefficient of friction. Cu-PE-PTFE composite coating after discharge treatment has the decreased dynamic coefficient of friction and improved wear resistance. POLYM. ENG. SCI., 58:103–111, 2018. © 2017 Society of Plastics Engineers
研究领域:
材料科学
·
聚合物工程
·
表面改性
·
摩擦学
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DOI
高影响因子
危险品化学品经营许可证（带存储）