SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Fengzhen Gao,Junxuan Liang,Faying Fan,Rui Wang,Benshuai Jiang,Kewei Zhang
Electrochemical gas sensors (EGSs) are the most effective means for detecting NO 2 gas in industry, while facing the issue of exorbitant cost due to the use of expensive Pt catalyst. Herein, well-dispersed C-SiO 2 into polytetrafluoroethylene (PTFE) was adopt as high-stable gas diffusion membrane for ultrafast electrochemical NO 2 sensors. The nano-SiO 2 not only prevents material aggregation but also constructs porous networks between the gas diffusion electrode and gas molecules, providing a larger sensing area for high sensor performance. The fabricated sensor exhibits excellent response linearity, short response time, and high stability. As compared with commercial Pt/C electrode, the sensor response is improved by 170 %. Moreover, a multiple linear regression model was introduced to predict the response values of NO 2 in the range of 5–100 ppm, achieving only 1.5 % deviation from the real values. This work not only demonstrates the feasibility of non-precious metals in gas diffusion membranes but also provides guide for designing next-generation low-cost EGSs.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Yi-Hui You,Chang-Dong Gu,Xiu-Li Wang,Jiang-Ping Tu
Electrodeposition process of Ni–polytetrafluoroethylene (PTFE) composite coatings is limited to use aqueous plating bath where nonionic/cationic wetting agents usually are necessary to prohibit the hydrophobic PTFE particles being coagulated. This study proposes a novel electrolyte for the depositing Ni–PTFE composite coatings which is formed in a deep eutectic solvent (DES). The DES with a non-aqueous nature allows the PTFE particles well be dispersed in the electrolyte without the additive of any wetting agents. The Ni–PTFE composite coatings are successfully electrodeposited from the proposed DES-based plating bath which is confirmed by the scanning electron microscope and X-ray energy dispersive spectroscope. Deposition mechanism, microstructure, and properties of the composite coatings are investigated. Importantly, it is found that the Ni–3.1wt.% PTFE composite coating shows a hydrophobic behavior with a contact angle of about 121±1° and an enhanced wear resistance than the pure Ni coating due to the incorporation of PTFE.
研究领域:
材料科学
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电化学
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表面工程
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复合涂层
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2020
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IF 3.871
Yinghui Hu,Bowen Tao,Dongyu Hao,Ruiqing Fan,Debin Xia,Kaifeng Lin,Aimin Pang,Yulin Yang
In this study, the evaporation induced self-assembly (EISA) method was used to encapsulate nano-sized aluminum (nAl)/polytetrafluoroethylene (PTFE) into ammonium perchlorate (AP) to form isolated encapsulated units with size distribution of 1–5 μm. The encapsulated AP/nAl/PTFE composites exhibited a higher combustion heat release (20109.2 J g −1 in 3 MPa O 2 and 11137.2 J g −1 in air), shorter ignition delay time (25.0 ms) and burning time (31.0 ms) than physically-mixed ones (18348.5 J g −1 and 10595.6 J g −1 , 62.5 ms and 32.5 ms). Among all of the prepared composites, AP/nAl/PTFE with 15 wt% PTFE showed the optimum combustion performance. The Al 2 O 3 shell of nAl could be efficiently etched by the in situ formed acid and F gases from AP and PTFE decomposition, which led to cracks and holes to release more active Al. The more intimate interaction, shorter diffusion length and more active Al release contributed to the enhanced combustion performance of AP/nAl/PTFE.
研究领域:
材料科学
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燃烧化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2019
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IF 3.42
Jieqi Wang,Chengcai Li,Feng Wang,Bin Yu,Yunying Luo,Huanzhong Zeng,Hailin Zhu
In order to enhance the hydrophilicity and anti-fouling property of polytetrafluoroethylene (PTFE) flat microfiltration membrane, the PTFE flat membrane was modified via cross-linking O-carboxymethyl chitosan (OCMCS) and polyethyleneimine (PEI) with glutaraldehyde (GA). Membrane performance was characterized by Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR), X-ray Photoelectron Spectroscopy (XPS), Field Emission Scanning Electron Microscope (FESEM), water contact angle and pure water flux. Results from ATR-FTIR and XPS showed that PEI and OCMCS were introduced into the modified PTFE membranes successfully. The modified PTFE membrane was endowed with excellent hydrophilicity compared with the original membrane by the result of increased pure water flux. Bovine serum albumin (BSA) static adsorption test and dynamic cross-flow fouling experiment results showed that the modified membrane has good anti-fouling ability. The pure water flux and the contact angle of the modified membranes changed with a variation in the time, GA concentration, OCMCS concentration, and OCMCS:PEI (mass ratio). It seemed that the optimal time, the concentration of OCMCS, the mass ratio of OCMCS and PEI, and the concentration of GA were 12 h, 5 g/L, 4:1 and 5 g/L, respectively.
研究领域:
材料科学
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膜技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
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2021
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IF 4.872
Xinle Yao,Sen Liu,Zhongying Ji,Rui Guo,Chufeng Sun,Yuxiong Guo,Xiaolong Wang,Qihua Wang
Three-dimensional (3D) target-region-lubrication printing of photosensitive polyimide (PSPI) filled with polytetrafluoroethylene (PTFE), i.e., PSPI-PTFE, with excellent tribological properties for self-lubricating devices was realized by digital light processing of PSPI-PTFE ink and thermal post-treatment. The 3D-printed PSPI-PTFE composites exhibited the friction coefficients and wear rates sharply reduced by 88% and 98%, respectively, and good mechanical properties , thermal stability and interlayer bonding as well. Importantly, the surfaces with lubricating only in regions where needed were readily realized due to the layer-by-layer manufacturing manner of 3D printing . As proof-of-concept, a target-region-lubricating bearing was demonstrated successfully, which run stably with a speed ranged from 60 to 180 rpm/min, indicating that the 3D-printed PSPI-PTFE composites are suitable for fabricating devices with complex and special shapes.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2018
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IF 3.316
Chen Pan,Kaichang Kou,Yu Zhang,Ziyu Li,Tiezheng Ji,Guanglei Wu
Porous polymer materials have been widely used for the preparation of low dielectric constant materials, but they also suffer from high moisture absorption and decreased thermal conductivity. In this study, core–shell structured hexagonal boron nitride coated hollow glass microsphere (HGM@hBN) particles were prepared using an electrostatic-assembly process and incorporated into poly(tetrafluoroethylene) (PTFE). The composites exhibited decreased dielectric constants due to the implantation of air, which is mainly encapsulated in HGM . The hBN layer on the surface of HGM effectively enhanced composite thermal conductivity due to its special core-shell form. The 30 vol% HGM@hBN/PTFE composites had a low dielectric constant of 1.68, low moisture absorption of 0.11%, and thermal conductivity (0.276 W/mK) was improved by 43% compared with that of 30 vol% HGM/PTFE composites. This study provides a facile and cost-effective strategy for fabricating polymer composites with low dielectric constant, low moisture absorption and no deteriorated thermal conductivity simultaneously.
研究领域:
材料科学
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复合材料
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高分子科学
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电气工程
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热能工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Qi Qiang,Jiaxiang Qin,Yi Ma,Zenglin Wang,Chuan Zhao
Fabrication of stable and functional patterns on the surface of PTFE remains a great technical challenge owing to its inertness and high hydrophobicity. Here, we report for the first time the fabrication of functional micropatterns on the PTFE surface by selectively irradiating plasma-treated PTFE coated with the monomer solution. A series of uniform highly dense poly(dopamine methacrylamide) (denoted as PDMA) line patterns with line/pitch widths of 20/20 and 50/50 μm are fabricated on the surface of PTFE (denoted as PDMA-p/PTFE) using dopamine methacrylamide (DMA) as the monomer. Surface graft copolymerization occurs and is attributed to the universal adsorption of DMA and the low grafting energy barrier, compared with the polymerization energy barrier, which is also demonstrated by the DFT calculations. Further, robust well-defined metal Ag or Cu patterns with strong adhesion strength are fabricated on the surface of the PTFE film by electroless deposition and are demonstrated for applications in flexible electronics. The approach is demonstrated to be versatile for fabrication of PDMA micropatterns onto a wide range of polymeric substrates, including polypropylene and acrylonitrile butadiene styrene.
研究领域:
材料科学
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柔性电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Xinzhu Zhang,Tingyu Li,Zhi Wang,Jixiao Wang,Song Zhao
The practical application of solvent-resistant nanofiltration (SRNF) still faces major challenges arising from the swelling and dissolution of substrates in organic solvents , especially in polar aprotic solvents such as dimethylformamide (DMF). To address these issues, polytetrafluoroethylene (PTFE) substrates with strong resistance to organic solvents was employed to fabricate solvent-resistant nanofiltration composite membranes . A novel reverse flexible-chain binding interfacial polymerization (rFB-IP) was proposed to fabricate polyamide (PA) selective layer onto PTFE substrate with ultra-low surface energy. Specifically, aiming at strengthening the bonding force between the substrate and selective layer, PDMS was employed as a flexible-chain binder to generate a cross-linked network on the substrate surface and within the pores to generate an interpenetrating structure with PA selective layer. The as-prepared rPA-PDMS/mPTFE composite membrane exhibited DMF permeance of 0.4 L m −2 h −1 bar −1 , 97.1% rejection to Rose Bengal (RB), a stable performance during a filtration process for 120 h, or after being immersed in DMF for 120 d. Therefore, the rFB-IP technique successfully settled the issues of the application of PTFE substrate for composite membrane fabrication, and would have outstanding potential in the development of polar aprotic SRNF membrane .
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Jinxin Liu,Zinan Cheng,Haoyun Zhao,Dong Zou,Zhaoxiang Zhong
Development of membranes with robust anti-scaling and anti-fouling properties are highly required for vacuum membrane distillation (VMD) of saline solution. Therefore, we proposed a facile and benign strategy to construct a polytetrafluoroethylene (PTFE)-based membrane with an asymmetric surface wetting Janus structure consisting of a hydrophobic PTFE substrate and a thin hydrophilic hydrogel-like coating layer. The coated layer was made of the ionic cross-linked alginate and chitosan networks through electrostatic interaction and hydrogen bonding. Owing to the favorable swelling behavior and reduced water evaporation enthalpy of hydrogel top layer, the Janus composite membranes (noted as PTFE@CS/SAH) maintained the stable vapor flux of 32 L m −2 h −1 at 50 °C. Notably, the PTFE@CS/SAH sustained stable desalination efficiency for the treatment of challenging saline solution containing mineral oil or surfactant. Moreover, the long-term VMD operation test demonstrated that PTFE@CS/SAH exhibited strong scaling- and organic fouling- resistance facing simulated seawater. The simultaneous anti-scaling and anti-fouling mechanism of PTFE@CS/SAH have been systematically investigated and summarized as the synergistic effect of dense hydration layer, favorable electrostatic interaction as well as the robust capillary pressure imparted by coating layer. This work brings fresh insights for the controllable design and construction of Janus structured membranes for VMD application.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xiaotian Yu,Wei Zhu,Yongqiang Li,Wenhao Zhu,Xu Chen,Haitao Hao,Mengyao Yu,Yi Huang
Oily wastewater poses a severe threat to the environment and human health, and its disposition is a worldwide urgency. Rencently, Janus membranes has provided excellent selectivity for oil/water separation due to thin layers of different wettability on opposite sides. However, the fabrication of Janus asymmetric multilayer with simple syntheses and excellent stability has been proved challenging. Herein, a Janus polydopamine-polytetrafluoroethylene/titanium dioxide (PDA-PTFE/TiO 2 ) membranes were inspired by dual-bionic strategy (lotus leaf and mussel) and constructed by centrifugal spinning technology. The membranes showed significant separation efficiency for both water–oil mixtures and emulsions above 99%. Most notably, the separation efficiency of the membranes are still maintained above 98.5% after 24 h immersion in the corrosive solutio. Meanwhile, the nanofiber membrane has outstanding reusability, acid/alkali resistance, and mechanical stability. Therefore, the dual-bioinspired Janus micro/nano PTFE/TiO 2 membrane suggests a promising potential application for a sustainable and effective oil–water separation membrane in the future.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2025
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IF 14.9
Ruiqi Du,Rui Jia,Bingjie Yuan,Zemao Chen,Kaizheng Zhang,Kaiqi Nie,Binhang Yan,Yi Cheng
Electrocatalysis has emerged as a sustainable approach for the selective oxidation of fatty alcohols to fatty acids, circumventing the environmental concerns associated with conventional routes. However, the low aqueous solubility of hydrophobic fatty alcohols presents a major challenge. While nickel hydroxide (Ni(OH) 2 ) serves as a cost-effective catalyst for alcohol oxidation, its hydrophilic nature limits substrate accessibility and mass transport, causing sluggish kinetics and competing oxygen evolution. Herein, we propose a hydrophobic interface engineering strategy via co-electrodeposition of Ni(OH) 2 with polytetrafluoroethylene (PTFE), fabricating the composite electrode (ED-Ni(OH) 2 -PTFE). The optimized electrode achieves 95% Faradaic efficiency for octanoic acid at 1.5 V vs. RHE, with a production rate 2–3 times higher than pristine Ni(OH) 2 . Mechanistic studies combining in situ Raman spectroscopy, fluorescence imaging, and coarse-grained molecular dynamics simulations reveal that PTFE selectively enriches octanol at the electrode-electrolyte interface by modulating interfacial hydrophobicity. A continuous-flow microreactor integrating anodic octanol oxidation with cathodic hydrogen evolution reduces cell voltage by ∼100 mV, achieving simultaneous fatty acid and hydrogen production. This work highlights the critical role of hydrophobic interfacial microenvironment design in organic electrosynthesis, offering a promising strategy for upgrading fatty alcohols under mild conditions.
研究领域:
电催化
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可持续化学
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有机电合成
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界面工程
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能量转换
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION AND FLAME
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2025
·
IF 6.2
Biao He,Saichao Song,Zhiwei Han,Yuanlin Fan,Jingyan Wang,Yaning Li,Jian Li
Aluminum/polytetrafluoroethylene (Al/PTFE) exhibits significant application potential as a high-energy additive in energetic materials. However, its utilization is limited by the native aluminum oxide shell on aluminum surfaces and inefficient mass/heat transfer between Al and PTFE, which substantially impair combustion kinetics and energy release efficiency. To address this, we employed electrostatic spray technology with Nitrocellulose (NC) as a binder to fabricate composite microspheres featuring self-reactive 3D thermal-conductive networks. These microspheres demonstrate enhanced energy release and combustion reactivity. Systematic characterization of Al/PTFE/NC composites through open- and closed-space combustion tests revealed superior energy output characteristics attributed to their internal 3D networks. Compared to physically mixed counterparts, the composites exhibit significantly improved combustion pressure (3.64 ×), pressurization rate (5.91 ×), and combustion velocity (1.61 ×). Furthermore, parametric studies established that 5 wt% NC content and an Al/F ratio of 4:6 yield optimal combustion performance. This work demonstrates that energetic-fiber-constructed 3D networks enhance intra-particle mass/heat transfer, enabling efficient combustion of Al/PTFE composites and providing strategic guidance for their advanced applications.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）