Polymers
·
2022
·Vol. 14
·期 19
·4231
·
IF 4.967
Xu Li,Meijuan Cao,Shasha Li,Luhai Li,Yintang Yang,Ruping Liu,Zhicheng Sun,Lixin Mo,Zhiqing Xin,Yinjie Chen,Yaling Li,Yi Fang,Yuansheng Qi
A simple and novel method for the deposition of polypyrrole (PPy) and cellulose nanocrystal (CNC) composites on different fiber substrates by reactive ink-jet printing was proposed. PPy/CNCs composites were successfully prepared, and the surface resistance of conductive layer deposited on different fiber substrates is the least when the monomer concentration is 0.6 M. PPy/CNCs were deposited on polyethylene terephthalate (PET) to form a conductive layer by adding polyvinyl alcohol (PVA), and the optimum sintering temperature is 100 °C (monomer/PVA ratio 4.0, conductivity 0.769 S cm−1). The PPy/CNCs conductive layer deposited on the paper has the lowest surface resistance and the best adhesion, and the surface resistance of PPy/CNCs conductive layer decreases first and then increases with the increase of sulfonate concentration. Moreover, the volume of anion in sulfonate will affect the arrangement and aggregation of PPy molecular chain in composite materials. Appropriate sulfonate doping can improve the conductivity and stability of conductive paper, and the maximum conductivity is 0.813 S cm−1. Three devices based on PPy/CNCs conductive paper were proposed and fabricated. Therefore, this ink-jet printing provides a new method for the preparation of conductive materials, sensors, energy storage and electromagnetic shielding, etc.Keywords:PPy;CNC;fiber substrate;conductivity;ink-jet printing
研究领域:
材料科学
·
纳米技术
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Keyu Tao,Huamei Dan,Yang Hai,Li Liu,Yun Gong
Even though transition metal phosphides (TMPs) have been regarded as very promising catalysts for hydrogen evolution reaction (HER), exploring highly reactive TMPs-based catalysts with reliable stability in alkaline media remains an enormous challenge. Herein, using wafer-like Co(CO 3 ) 0.5 (OH)·0.11H 2 O as template followed by anion-exchange and further phosphorization process, it is synthesized a three-dimensional (3D) hierarchical porous heterostructure with highly dispersed ultrafine metallic Co 2 P nanoparticles uniformly anchored on porous conductive CoWO 4 nanofiber matrix, which not only promotes the electron transfer, but also avoids the deterioration of phosphide. In addition, the electron densities re-distribution within the heterostructure also contributes to the improved catalytic activity. Furthermore, the doping of W into Co 2 P gives proper H adsorption free energy ΔG H . Impressively, the Co 2 P/CoWO 4 /Ni foam (NF) exhibits an overpotential of 81 mV at −10 mA cm −2 and a Tafel slop of 47 mV dec −1 along with supreme long-term durability at −40 mA cm −2 . The present work also demonstrates different dosages of Na 2 WO 4 in the anion-exchange step will lead to different phase compositions and morphologies, giving rise to different HER electrocatalytic performances of the phosphorized samples.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
HaiYan Huang,JingJing Xia,Ying Liu,JiaoJiao Wang,XueMin Chen,WenXu Wang,Qianqian Lan,Xu Zhang,Yan Lv,Tianxi Liu
Nanofiltration membranes (NFMs) with superior permeability and high rejection of both divalent anions and cations are highly desirable to meet the increasing separation demands of complex systems. Herein, we propose a three-in-one strategy to develop a state-of-the-art dually charged thin-film composite (TFC) nanofiltration membrane consisting of a positively charged electrospun nanofiber substrate (NFS) with surface mineralization and a negatively charged polyamide (PA) selective layer prepared by interfacial polymerization (IP). The highly hydrophilic mineralized nanofiber substrate not only effectively reduces the thickness of the PA selective layer but also crumples its structures by the abundant zirconia nanoparticles on the substrate surface, resulting in excellent water flux (15.0 L m–2 h–1 bar–1) for the TFC NFMs. The relationship between the thickness of the selective layer and substrate is further investigated using dissipative particle dynamics (DPD) simulations. Meanwhile, the dually charged NFM exhibits relatively high rejection for both anions (97.1% for Na2SO4 and 97.9% for MgSO4) and cations (87.9% for MgCl2) in aqueous solutions compared with single-charged membranes, which is attributed to the dual-repulsion effect of the selective layer and the substrate surface bearing opposite charges. Moreover, the prepared NFMs exhibit good stability and excellent antifouling performance. This work may pave the way for the development of highly efficient nanofiltration membranes for the practical separation of comprehensively charged solutes.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Jiahui Li,Yang Pan,Wenqi Ji,Haipeng Zhu,Gongping Liu,Guangru Zhang,Wanqin Jin
Polydimethylsiloxane (PDMS) is a benchmarked membrane material for pervaporation , gas separation, and nanofiltration , remaining challenges in achieving high-flux membrane. Herein, we proposed a high-flux PDMS membrane with corrugated morphology realized by simply coating PDMS solution on nanofiber substrate. It was demonstrated that the electrospun nanofiber substrate with highly interconnected and porous structures could generate a corrugated PDMS membrane layer with highly increased surface area and meanwhile remarkably reduce transport resistance of the membrane. By optimizing the pore structure of nanofiber substrate and reducing the membrane thickness to sub-micrometer, the corrugated PDMS membrane exhibited up to one order of magnitude higher permeation flux compared with state-of-the-arts PDMS membranes for pervaporation separation of ethanol/water mixtures. Specifically, using a 5 wt% ethanol/water mixture as feed at 60 °C, a total flux of 8.7 kg m −2 h −1 and a separation factor of 7.2 were obtained. This work provides a facile approach to develop nanostructured membranes with highly enhanced transport properties.
研究领域:
材料科学
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guangyu Fang,Xiaorui Ma,Rong Hu,Jiao Dai,Haoran Tian,Lin Li,Weilin Xu,Yonggang Yao,Jun Wan
Fiber-based energy storage devices present distinct advantages over rigid alternatives, particularly for flexible and wearable applications. However, achieving stable integration of electrochemically active materials with fiber substrates remains a significant challenge, especially for carbon fibers (CF), due to their inherent physical smoothness and chemical inertness make them prone to interfacial separation under repeated bending and deformation in practical applications. In this study, we employed a salt template-assisted vapor-phase polymerization method to achieve horizontally oriented growth of 2D conductive polymer complex on CF, thereby forming a bamboo sheath-like structure with a 2D juxtaposed ultrathin nanosheet-coated fiber interface (2D-JUN-FI). The skinned nanosheets on CF ensure maximized interfacial binding in the vertical interfaces through extensive surface coverage and hydrogen bonding interaction, while maintaining the structure integraty in the horizontal plane, thus resulting in both high mechanical robustness and electron mobility under static and dynamic deformations. The synthesized electrode of 2D polypyrrole and amorphous niobium oxide on CF composites (2D Ppy/a-Nb 2 O 5 /CF) demonstrates high specific capacity and an exceptionally long cycling life (88.06 % capacitance retention after 5000 cycles). This template-assisted horizontal growth of the 2D-JUN-FI skinned structure provides a novel approach for developing high-stability and long-life flexible energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Chao Han,Xuan Zhang,Chun Ding,Shu Xiong,Xi Yu,Yan Wang
Substrate construction is considered as the most effective approach to alleviate the internal concentration polarization (ICP) effect, and therefore achieves the excellent performance of resultant thin-film composite (TFC) membrane in forward osmosis (FO) process. In this work, a well-aligned nanofiber substrate was prepared and employed for constructing the high-performance TFC-FO membrane for the first time. The physicochemical properties of the substrate, the micro-structure of polyamide layer and the separation performance of resultant TFC-FO membranes were systematically investigated. Taking advantages of the larger pore size and the better pore interconnectivity of the well-aligned nanofiber substrate, the resultant TFC-FO membrane achieves the best water fluxes of 50.7 and 62.9 LMH, accompanied with the ultralow reverse salt flux in FO and PRO modes, using deionized water feed solution and 1 M NaCl aqueous draw solution. This work may provide a new orientation in developing high-performance TFC membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yirong Qi,Jianfeng Huang,Liyun Cao,Xingang Kong,Liangliang Feng,Haijun Ma,Faliang Luo,Qingqing Liu,Ying Wang,Wenchao Li,Wei Liang,Xin Hao,Ayumu Onda,Yongqiang Feng
Photoelectrocatalytic water splitting represents a sustainable strategy for producing “green hydrogen” through visible-light-driven hydrogen evolution (HER) and oxygen evolution reactions (OER) under applied bias. The advancement of cost-effective photoelectrode materials with high efficiency and durability remains imperative, as single-component semiconductors often suffer from inadequate bandgap alignment, inefficient carrier separation, and insufficient stability. Herein, we fabricate Bi 2 WO 6 /Ti 3 C 2 T x -800 composite photoanodes on recyclable carbon felt (CF) substrates via electrophoretic deposition. By strategically modulating the work function at the Mott-Schottky junction of Bi 2 WO 6 /Ti 3 C 2 T x -800, we precisely tailored the energy band structure of Bi 2 WO 6 , enhancing its carrier separation efficiency and light absorption. The optimized system delivers a photocurrent density of 6.44 mA cm −2 at 1.23 V vs. reversible hydrogen electrode (RHE), alongside an applied bias photon-to-current efficiency (ABPE) of 0.73 % at 1.08 V and a charge-transfer efficiency (η tran ) of 74.68 % at 1.23 V, surpassing most reported Bi 2 WO 6 -based counterparts. This work establishes a robust design paradigm for high-performance photoanodes, advancing scalable solar-driven water-splitting technologies.
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2015
·Vol. 22
·期 4
·2717-2727
·
IF 3.573
Li Mufang,Wu Zhihong,Luo Mengying,Wang Wenwen,Chang Kangqi,Liu Ke,Liu Qiongzhen,Xia Ming,Wang Dong
Thin film composite (TFC) membrane is one of the most promising technologies in the purification field. In this study, a novel highly hydrophilic and anti-fouling cellulose TFC membrane was prepared based on the hierarchical poly(vinyl alcohol- co -ethylene) (PVA- co -PE) nanofiber substrate. The morphology and hydrophilicity of the hierarchical PVA- co -PE nanofiber substrate and the cellulose TFC membrane were analyzed by SEM, FESEM, and contact angle goniometry. To optimize the performance of cellulose TFC membrane, the effects of coagulation bath, cellulose concentration and thickness of cellulose layer on the filtration efficiency, water flux as well as the mechanical property were studied. The anti-fouling property of the cellulose TFC membrane was analyzed by testing the change in the flux of membrane during repeated bovine serum albumin (BSA) filtrating and fouling process. The results show that the filtration efficiency of cellulose TFC membrane to BSA with the diameter of 2–10 nm could be above 97 %. Due to the hydrophilicity of the top cellulose layer, the cellulose TFC membrane exhibits excellent anti-fouling property by showing the 100 % flux recovery ratio.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Matter
·
2025
·
IF 17.5
Jiayi Liu,Quanfen Guo,Huahui Tian,Yao Cheng,Xianqi Xu,Ziyi Zhang,He Hao,Zixuan Ding,Kun Jiao,Jiaxin Zheng,Jin Zhang,Xin Gao
Carbonene materials such as graphene and carbon nanotubes (CNTs) exhibit exceptional electrical properties, making them promising for electromagnetic interference (EMI) shielding coatings. However, their hydrophobic and chemically inert nature poses challenges for uniform assembly onto hydrophilic or inert fiber surfaces, often requiring surface treatments or chemical modifications. Here, we report a dimension-engineering strategy to fabricate robust, conductive carbonene coatings on fiber substrates. Using a wet-chemistry assembly process, graphene sheets were first deposited as a base layer, followed by sequential integration of CNTs. This hierarchical assembly reduces graphene wrinkling and enhances sp 2 -carbon continuity. A 486-nm-thick carbonene coating boosted the conductivity of aramid fiber (AF) from 0 to 641.47 S/cm while maintaining a high tensile strength of 5.92 GPa. Fabrics woven from these coated AFs showed an EMI shielding effectiveness of 85.88 dB in the X band. This study presents an effective strategy for developing universal coatings, highlighting their applications for EMI shielding.
研究领域:
材料科学
·
纳米科技
·
高分子科学
·
表面工程
·
电磁功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Chao Han,Qin Liu,Qing Xia,Yan Wang
Membranes with high permeance, excellent selectivity coupled with adequate solvent resistance are required for organic solvent nanofiltration (OSN) applications. But the “trade-off” relationship between the solvent resistance and permeance remains a critical challenge for polymeric-based thin film composite (TFC) membranes with necessary chemical crosslinking. Herein, a novel facile cyclization modification of polyacrylonitrile (PAN) nanofiber substrate is proposed by a simply thermal treatment and subsequent alkaline hydrolysis, and employed for the fabrication of TFC-OSN membrane for the first time in strong polar aprotic solvent systems. The reaction mechanism involved, solvent resistance and pore structure of PAN nanofiber substrate brought by the modification are investigated. TFC-OSN membrane supported by the modified PAN nanofiber substrate exhibits ultrahigh solvent permeance up to 13.3 L m −2 h −1 bar −1 coupled with a 99.7% rejection in rose bengal/DMF system and a good long-term stability. This study is therefore believed to provide useful guidelines for the development of next-generation OSN membranes.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yi-Chen Wang,Wei-Jian Wang,Qian Wang,Zhen-Yuan Wang,Xiang-Yu Yan,Liu-Lin Zhao,Xue-Li Cao,Shi-Peng Sun
Organic solvent nanofiltration (OSN) as a new paradigm technology could satisfy the rapidly growing demand for small-molecular separation and purification in organic solvent systems. Aiming at two main bottlenecks of weak solvent resistance of traditional polymers and high transfer resistance of traditional phase inverted membrane structures, intrinsic solvent-resistant nylon 6 (PA6) was electrospun into nanofibrous substrates to avoid complex cross-linking and lower the transport resistance. A novel solvent-assisted remelting method was proposed to optimize PA6 nanofibrous substrates: pore size and roughness of substrates were reduced, which would provide an ideal substrate for constructing defect-free selective layer; (2) crystal form of PA6 was transferred from semi-stable γ state to stable α state, leading to 2.5 times enhancement of mechanical strength of membranes. Based on the optimized substrate, a high-performance composite membrane was constructed successfully via interfacial polymerization, displaying high methanol permeability of 9.6 L m −2 h −1 bar −1 and high rejections for different water-soluble and alcohol-soluble dyes, which indicates a succinct and efficient strategy for designing novel OSN membranes.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
DOI
高影响因子
LAB ON A CHIP
·
2016
·Vol. 16
·期 18
·3460-3465
·
IF 5.586
Biao Ma,Yi-Zhen Song,Ji-Cheng Niu,Zhi-Yong Wu
We present a novel electrokinetic stacking (ES) method based on field amplification on a simple paper device for sample preconcentration. With voltage application, charged probe ions in a solution of lower conductivity stack and form a narrow band at the boundary between the sample and the background electrolyte of higher conductivity. The stacking band appears quickly and stabilizes in a few minutes. With this ES method, three orders of magnitude signal improvement was successfully achieved for both a fluorescein probe and a double-stranded DNA within 300 s. This enhanced stacking efficiency is attributed to a focusing effect due to the balance between electromigration and counter electroosmotic flow. We also applied this ES method to other low-cost fiber substrates such as cloth and thread. Such a simple and highly efficient ES method will find wide applications in the development of sensitive paper-based analytical devices (PADs), especially for low-cost point-of-care testing (POCT).
研究领域:
分析化学
·
即时诊断
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）