POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Zulan Liu,Songmin Shang,Ka-lok Chiu,Shouxiang Jiang,Fangyin Dai
The electrically conductive and flame-retardant bifunctional cotton fabrics were fabricated by polymerizing pyrrole (Py) onto the cotton fabrics and followed by doping phytic acid (PA) via a chemical oxidation method. The prepared cotton fabrics were then characterized by Four-point Probes Resistivity Measurement, Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR), Vertical Burning Test and Thermogravimetric Analysis (TGA). The results of SEM and FTIR tests indicated that pyrrole was successfully polymerized on the cotton fabrics. The EDS measurements showed that the phosphorus increased with increasing phytic acid concentration. The results of four-point probes resistivity measurement, vertical burning test and TGA test exhibited that both the electrical conductivity and the Limit Oxygen Index (LOI) of the treated fabrics increase with increasing phytic acid concentration. The LOI of the cotton fabric increased from 18% to 37.6% after the cotton fabric was deposited with polypyrrole and doped with phytic acid. The conductivity of the treated cotton fabrics is mainly affected by the pyrrole concentration and can reach about 0.28 S cm −1 .
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
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
JOURNAL OF POLYMER ENGINEERING
·
2024
·
IF 1.7
Ziyu Liu,Yanqing Liu,Chong Zhang,Takashi Sakamaki,Xianning Li
Conductive filter membranes have shown great potential in alleviating membrane fouling. In this study, polypyrrole (PPy) was used as the conductive material and sodium anthraquinone-2-sulfonate (AQS) was used as the dopant to perform surface modification on the PVDF membrane. After modification, the contact angle of the membrane decreased from 79.40° to 48.57°, and the electrical conductivity of membrane increased from zero to 1.60 S/cm. The good hydrophilicity and electrical conductivity of PPy-AQS/PVDF endowed it with superior antifouling capabilities, reducing the static protein (BSA) adsorption from 0.147 mg/cm 2 to 0.097 mg/cm 2 . Under the action of an electric field of −0.1 V, the flux decay rate of PPy-AQS/PVDF decreased, and the flux recovery rate improved.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 8
·3504-3513
·
IF 3.288
Qingqing Zhou,Jiayi Chen,Tianchi Zhou,Jianzhong Shao
A flame-retardant conductive cotton fabric switch was successfully prepared by the in situ polymerization of polyaniline doped with novel phytic acid (PA) by impregnation in an ice water bath for 24 h. The surface morphology, chemical composition, and thermal properties of the fabric before and after the in situ polymerization of polyaniline with PA were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TG), and TG-FTIR. The experimental results demonstrated that the limiting oxygen index (LOI) of the original fabric increased to 32% and the sheet resistance (Rs) decreased to 1.13 kΩ □−1. Under the PA de-doped state, the fabric had no flame-retardant and conductivity properties. Nevertheless, the excellent flame-retardant and conductivity properties of the fabric were obtained once more after re-doping with PA, which indicated that the flame-retardant and conductive textile switch was prepared successfully. Remarkably, the variation in the P content by XPS and the characteristic absorption peak of PA by FTIR made the doping behavior of PA on the surface of different fabrics clear. During the pyrolysis of the original and finished fabric, the maximum decomposition temperature (Tmax) and the maximum emission (Te) of light gas decreased from 380 °C to 290 °C, and the carbon residue content increased from 12.6% to 39.2% at 700 °C, which indicated that the in situ polymerization of aniline doped with PA resulted in the superior flame-retardant property of the fabric. This work provides a green method and basis for the preparation of multi-functional textiles, thus improving the added value of textiles.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shasha Zheng,Huijie Zhou,Huaiguo Xue,Pierre Braunstein,Huan Pang
The poor conductivity, unsatisfactory stability and easy aggregation of metal–organic framework (MOF) nanomaterials have been recognized as the main reasons that prevent their practical application. Here, we report the highly conductive and cyclic-stable Ti 3 C 2 MXene@pillared-layer [Ni(thiophene-2,5-dicarboxylate)(4,4′-bipyridine)] n MOF composites (MXene@Ni-MOF). Based on the hard-soft-acid-base principle, the pillared-layer Ni-MOF porous structure with Ni-N coordination bonds confer better structural stability. The Ni-MOF nanosheets are immobilized by the MXene , leading to fast charge transfer between the Ni-MOF and MXene, solving the problem of poor conductivity of Ni-MOF, while avoiding the agglomeration of Ni-MOF nanosheets. Moreover, the strong interaction between the organic ligands of Ni-MOF and surface functional groups of MXene plays a key role: it reduces the exposure of surface groups of MXene, limits the oxidation of MXene, and increases its layer spacing, thus facilitating the rapid ion transport. The MXene@Ni-MOF exhibits a high specific capacitance (979 F g −1 at 0.5 A g −1 ) and the new aqueous asymmetric supercapacitor device displays an excellent cycling property with only 2% decay after 5000 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Hong Zhang,Yao Chen,Xiaofang Liu,Hengyang Wang,Chengzhi Niu,Sikang Zheng,Bin Zhang,Xu Lu,Guoyu Wang,Guang Han,Xiaoyuan Zhou
SnSe-based materials, comprising nontoxic, eco-friendly and abundant elements, have intrinsically low lattice thermal conductivity , which are promising candidates for thermoelectric conversion. However, unmodified, polycrystalline SnSe reveals poor electrical transport properties due to the lower carrier mobility . Herein, two-dimensional Ti 3 C 2 T x MXene has been incorporated into SnSe matrix by solution synthesis and fast consolidation, which efficiently increases the carrier mobility and concentration; accordingly, the electrical conductivity is improved in the temperature range of 323–523 K. Meanwhile, SnSe/Ti 3 C 2 T x composites achieve diminished lattice thermal conductivity, delivering a low value of 0.41 W m −1 K −1 at 773 K. Ultimately, a peak zT of 0.93 at 773 K is attained in SnSe/Ti 3 C 2 T x composite with addition of 0.3 wt% Ti 3 C 2 T x , representing a 66% increase compared to that of SnSe. This work sheds light on the thermoelectric performance improvement of polycrystalline SnSe by controllably incorporating two-dimensional MXene.
研究领域:
材料科学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Zhuang Fu,Jia-Ling Jiang,Song-Tao Dong,Miao-Cheng Yu,Lijun Zhao,Lei Wang,Shu-Hua Yao
In this study, the facile synthesis method of Bi 2 − x Zr x O 2 Se ( x = 0, 0.02, 0.04, and 0.06) ceramics using a combining the high-energy ball milling and cold pressing was reported. The effects of zirconium (Zr) doping on the microstructure and thermoelectric properties of Bi 2 O 2 Se were systematically investigated. The results indicate that the powder samples were synthesized as a single phase with no impurities. With increasing Zr content, conductivity increased from 13.49 S to 34.91 S cm −1 at 773 K. The thermal conductivity of Bi 1.98 Zr 0.02 O 2 Se was also reduced to 0.51 W m −1 K −1 . The maximum power factor (PF) value of the Bi 1.96 Zr 0.04 O 2 Se sample was 186 μW m −1 K −2 at 773 K. A peak ZT of around 0.27 was achieved for the Bi 1.96 Zr 0.04 O 2 Se sample, which is approximately 2.4 times greater than that of un-doped one (∼0.11). The results indicate that Zr-doping significantly improves the thermoelectric properties of the Bi 2 O 2 Se system.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 19
·10337-10345
·
IF 11.9
Zhongguo Wang,Xiong-Fei Zhang,Lian Shu,Jianfeng Yao
Hydrogels fabricated from top-down wood nanotechnology have attracted a lot of attention. Herein, two-dimensional and conductive MXenes are utilized as fillers and functional agents to impart a wood hydrogel with multifunctionality. Specifically, a wood substrate was directly converted into a wood hydrogel using an inorganic ZnCl2 solution system. ZnCl2 has a dual role in promoting the exfoliation and dispersion of MXenes, and simultaneously inducing the rearrangement of cellulose fibers. An extensive hydrogen bonding network between cellulose and MXenes can be constructed, and the ionic coordination between Zn2+ ions and hydroxyl groups serves as a secondary cross-linked network for the composite hydrogel. Enabled by the MXenes and Zn2+ ions, the as-prepared wood hydrogel presents well-preserved anisotropy, superior mechanical performance, high conductivity and extreme temperature tolerance. Moreover, the wood hydrogels demonstrate huge potential in the healthcare monitoring applications of human motion detection, temperature sensing and photothermal conversion. This study provides a simple strategy for developing wood hydrogel sensor systems with high conductivity and a wide temperature range response.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Wenzhuo Chen,Jian Yang,Jiazheng Hao,Feiran Shen,Lunhua He,Xia Deng,Jiasheng Lv,Jing Fang,Laijun Liu,Jungu Xu
The undoped K2ZnV2O7 material has a melilite-like structure, with the K+ ions distributed orderly on two distinguishable crystallographic sites, which is the main difference with the case in a typical A2B3O7 melilite material where the A site cations occupy only one crystallographic position. Herein, we report that substitution of Ga for Zn in K2ZnV2O7 would induce the K+ ions’ order-to-disorder transition and transform the K2ZnV2O7 from the melilite-like structure to a typical melilite phase, coupled with significantly enhanced oxide ion conductivity, e.g. ∼1.01 × 10–1 S/cm at 600 °C for the K2Zn0.7Ga0.3V2O7.15 sample, which is about 2 orders of magnitude higher than the parent material. The powder neutron diffraction data analysis results revealed two sites for the interstitial oxygen defects that are introduced by the donor-doping. The introduction of interstitial oxygen into the K layer strongly correlated with the K ions’ order-to-disorder transition, while the interstitial oxygens within the 5-fold (Zn/Ga/V)O4 tetrahedral rings are responsible for the enhanced oxide ion conductivity. These findings provided a comprehensive understanding of the melilite-like and typical melilite materials for the mechanism of the stabilization and migration of interstitial oxygen defects.
研究领域:
材料科学
·
固体化学
·
电化学
·
晶体学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Huanyu Zhou,Gengling Liu,Jinliang Liu,Yilin Wang,Qingyun Ai,Jun Huang,Zhongyi Yuan,Licheng Tan,Yiwang Chen
Different π-conjugated sulfonate templates, including dodecylbenzenesulfonate (DBS), 2-naphthalenesulfonate (NAS), N,N’-bis(2,6-diisopropylphenyl)-perylenediimide-1,6,7,12-tetraoxyphenylsulfonate (PTS), as well as auxiliary assistance by graphene (Gra) and multi-walled carbon nanotube (MWCNT), have been utilized to investigate the polymerization behavior of 3,4-ethylenedioxythiophene (EDOT) and the influence on the corresponding morphologies and properties. PEDOT has been self-polymerized with obviously agglomeration without template. Isolated PEDOT grains with coiled shape have been formed by DBS template polymerization. More crystalline and conductive PEDOT with quinoid-conformation and ordered arrangement has been developed by utilizing template with novel π conjugated sulfonate (PTS). Most prominently, the obtained conductive PEDOT:MWCNT shows continuous interpenetrating network structure with more extended PEDOT and well-dispersed MWCNT due to π-π interaction of PEDOT with noncovalent functionalized MWCNT by electron-deficient conjugated sulfonate. Furthermore, a high specific capacitance of 199 F g −1 at current density of 0.5 A g −1 for PEDOT:MWCNT has also been demonstrated successfully for owning potential applications in supercapacitors.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2013
·Vol. 24
·期 12
·4913-4918
·
IF 1.486
Wu Min,Lin Baoping,Cao Yi,Song Jiangang,Sun Ying,Yang Hong,Zhang Xueqin
In this paper, uniform and well dispersed silver-coated copper powders were prepared by replacing reaction at first. The structure and properties of the bimetallic powders were investigated by XRD, SEM and TGA. It was found that anti-oxidization of the silver-coated copper powders increased with the increase of the silver content slightly and a dense coating surface was observed at Ag content of 53.9 wt%. Furthermore, the pastes with relatively low silver content which were prepared from silver-coated copper powders, displayed high conductivity similar to pure silver even after sintering in air. And their sintering properties were also investigated at different temperature in air atmosphere. The film exhibits good electrical properties at sintering temperature between 800 and 900 °C. When the paste from silver-coated copper powder with Ag content of 53.9 wt% was printed on Al 2 O 3 substrate and sintered at 800 °C in air, the sheet resistance of the film is 0.036 Ω/□ only.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 42
·8862-8870
·
IF 6.331
Yaqing Liu,Daren Xu,Yi Ding,Xiaoxiao Lv,Tingting Huang,Bolei Yuan,Lin Jiang,Xueying Sun,Yuanqing Yao,Jun Tang
MXene is recognized as an ideal material for sensitive wearable strain sensors because of its unique advantages of conductivity, hydrophilicity and mechanical properties. However, conventional hydrogel sensors utilizing MXene as a conductive material inevitably encounter the excessive accumulation of MXene nanosheets during the process of synthesis, which limits the electron transmission, reduces the conductivity, and concurrently weakens the mechanical capability and sensitivity of sensors. Herein, we construct a dispersion-enhanced MXene hydrogel (DEMH) through a chitosan-induced self-assembly strategy for the first time. Charge transfer is carried out through the flow of a material or a collection of material microstructures, and thus the highly interconnected 3D MXene@Chitosan network provides fast transport channels for electrons, and the DEMH exhibits excellent conductivity and sensibility simultaneously. Besides, the electrostatic self-assembly between MXene and chitosan, and the supramolecular interactions between MXene, chitosan and polyacrylamide chain segment result in excellent mechanical strength (of up to 1900%) and flexibility of DEMH. Furthermore, the introduction of chitosan which possesses a high density of positively charged groups and MXene with semiconducting properties also endows sensor versatility, such as self-adhesion properties and antibacterial activity. This work develops a simple and cut-price strategy for combining MXene unaggregated into a hydrogel as a sensor with high conductivity, sensibility and flexibility. A simple and inexpensive strategy for avoiding self-stacking of two-dimensional conductive materials is proposed, which paves the way for a broad range of applications in electronic skin, human motion detection and intelligent devices.
研究领域:
材料科学
·
生物医学工程
·
电子皮肤研究
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）