SYNTHETIC METALS
·
2021
·
IF 3.266
Xing Xin,Jiarui Yu,Nan Gao,Xiaowen Xie,Shuai Chen,Jiang Zhong,Jingkun Xu
In aqueous dispersion of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), the mixture dispersion containing different proportion of polyhedral oligomeric silsesquioxanes (POSS) and dimethyl sulfoxide (DMSO) were added. These three components were physically blended to fabricate composite films for improving the mechanical properties and the water resistance of PEDOT:PSS films; a strong drawback hindering their electrical properties. The effect of the ratio of POSS compared to PEDOT:PSS was in particular investigated. It was convincingly proven that the introduction of POSS unit and strong polar DMSO improved surface roughness , hydrophobicity , stability, friction resistance and electrical properties of PEDOT:PSS films.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2015
·
IF 4.457
Yong-Qiang Liu,Hao-Di Wu,Yu Zhao,Ge-Bo Pan
Foreign ions are of significant importance in controlling and modulating the morphology of semiconductor nanocrystals during the colloidal synthesis process. Herein, we demonstrate the potential of foreign metal ions to simultaneously control the morphology and crystal phase of chalcogenide semiconductors. The results indicate that the introduction of Al3+ ions can induce the structural transformation from monoclinic CuClSe2 microribbons (MRs) to klockmannite CuSe nanosheets (NSs) and the growth of large-sized CuSe NSs. The as-prepared micrometer-sized CuSe NSs exhibit a high-conducting behavior, long-term durability, and environment stability. The novel properties enable CuSe NSs to open up a bright prospect for printable electrical interconnects and flexible electronic devices.
研究领域:
材料科学
·
半导体物理
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 19
·195710
·
IF 3.551
Songtan Yang,Zhixin Kang,Tao Guo
A facile, low-cost and environmentally-friendly technique has been developed to prepare highly conductive copper-graphene nanosheet (Cu-GNS) composite coatings on ABS (Acrylonitrile-Butadiene-Styrene) substrate. The surface activation of ABS substrate was obtained by a chrome-free and palladium-free pretreatment consisting of molecular bonding. Before electroplating Cu, the homogeneous single Ag film on ABS surface was achieved by the electroless spray-plating process. In addition, the deposition of Cu and GNS increased in the coatings along with the current density increasing. Four-point-probe test confirmed that the resistivity of Cu coatings (0.08 mΩ mm) and Cu-GNS composite coatings (0.05 mΩ mm) was in the same order of magnitude as pure copper (0.0175 mΩ mm) at high current density. Meanwhile, comparing with the Cu coatings, the resistivity of Cu-GNS composite coatings was reduced by nearly 40% at the same current density. The conductive property was significantly improved owing to the deposition of GNS. Therefore, this work was expected to expand the method of polymer materials surface metallization.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 13
·期 1
·52
·
IF 5.719
Kai Zhang,Xiaojun Tang,Fuzheng Guo,Kangli Xiao,Dexin Zheng,Yunsheng Ma,Qingsong Zhao,Fangxin Wang,Bin Yang
The current work studied the physical modification effects of non-covalent surfactant on the carbon-particle-filled nanocomposite. The selected surfactant named Triton™ X-100 was able to introduce the steric repelling force between the epoxy matrix and carbon fillers with the help of beneficial functional groups, improving their dispersibility and while maintaining the intrinsic conductivity of carbon particles. Subsequent results further demonstrated that the physically modified carbon nanotubes, together with graphene nanoplates, constructed an effective particulate network within the epoxy matrix, which simultaneously provided mechanical reinforcement and conductive improvement to the hybrid nanocomposite system. For example, the hybrid nanocomposite showed maximum enhancements of ~75.1% and ~82.5% for the quasi-static mode-I critical-stress-intensity factor and dynamic compressive strength, respectively, as compared to the neat epoxy counterpart. Additionally, the fine dispersion of modified fillers as a double-edged sword adversely influenced the electrical conductivity of the hybrid nanocomposite because of the decreased contact probability among particles. Even so, by adjusting the modified filler ratio, the conductivity of the hybrid nanocomposite went up to the maximum level of ~10−1–100S/cm, endowing itself with excellent electro-thermal behavior.Keywords:physical modification;steric repelling force;mechanical reinforcement;conductive functionality
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2024
·
IF 4
Xianglong Wan,Yue Wu,Shengfa Lai,Ancheng Weng,Timphena Nathabeth Jah,Ziang Du,Dehan Chen,Guoxin Ding,Guojun Cheng
The thermal stability and processing stability of polyaniline (PANI) as an electrode material is a spot widely concerned. This paper uses water-based polyurethane (WPU) as the polymeric substrate and uses in-situ polymerization to manufacture the PANI/WPU composite electrode material. Molecular structure, morphology of electrodes, thermal stability and polaron/dipole transition of PANI/WPU composites were observed. The results showed that the NH- group of aniline interacted with the NHCOO- group of WPU, and the PANI/WPU composite was prepared successfully. The PANI composite exhibits excellent electrical properties when its cyclic voltammetry curve is a nice rectangle with a ratio of 1:0.3 for WPU to aniline. When the current density is 1 A/g, the specific capacitance of the S3 sample reaches 473.3 F/g, which is much better than pure PANI. Compared with other composite materials, PANI/WPU has higher conductivity and good thermal stability. At the same time, PANI/WPU exhibits excellent chemical stability when used as an electrode material for concentrated cells. By solving the processing performance and thermal stability of PANI, it expands its applications in organic electronics.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 13
·9783-9791
·
IF 3.708
Li Liu,Xiaoxia Wan,Lingling Sun,Shuanglei Yang,Zhigao Dai,Qingyong Tian,Mei Lei,Xiangheng Xiao,Changzhong Jiang,Wei Wu
Monodisperse silver nanoparticles (NPs) have been synthesized on a large scale by oxidation–reduction reactions in water by adding triethylamine to the aqueous solutions of AgNO3, glucose and poly(vinyl pyrrolidone). Different anions, including –SO42−, –PO43−, –CO32− and –Br−, are introduced to the abovementioned mixture to form slightly soluble silver compounds, which are used as the precursor to synthesize silver NPs. The effects of silver nitrate–glucose ratio and reaction temperature are investigated. The electrical performance of the as-obtained Ag NPs has been studied, and the results reveal that the –CO32− mediated-synthesized Ag NPs possess the lowest resistivity. Note that silver NPs can be well-dispersed in ethanol and generated as inks, which can be screen printed onto flexible polyester (PET) and paper substrates and form conductive patterns after a low-temperature sintering treatment. An optimal electrical resistivity can be reached at 5.72 μΩ cm, which is much closer to the value of bulk silver (1.6 μΩ cm). Evidently, the synthesized silver NPs could be considered as low-cost and effective materials that have a great potential application for flexible printed electronics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 13
·e53668
·
IF 3
Pengxin He,Haihong Pu,Xinfeng Li,Xiaoqiong Hao,Jianhua Ma
Flexible and highly conductive fiber has attracted considerable attention with its massive potential in functional fabric, stretchable circuits, and wearable electronic devices. Herein, we prepared a novel secondary structure composite fiber based on aramid nanofibers (ANF)-reinforced thermoplastic polyurethane (TPU) fiber accompanied by carbon nanotube (CNT)-coated on its surface. The composite fibers' dispersibility, micromorphology, and application were systematically investigated. The TPU/ANF-0.5 wt% sample showed a robust reinforcing effect, as Young's modulus and tensile strength reached 17.2 and 20.2 MPa, respectively. Meanwhile, the conductive coating layer in the outer frame was formed via a TPU solution with 10 wt% CNT content, which gives the fiber excellent flexible electrical conductivity. Such a unique structural design enables the fiber to be closely attached to human skin and monitor human movement. In addition, this TPU/ANF@CNT composite fiber can also be used for light and electric heating. The photothermal equilibrium temperature can reach 120°C in 50 s, and the electrothermal equilibrium temperature increases to 62°C under 30 V. In summary, this secondary structure composite fiber with excellent electrical and mechanical properties might have great practical application potential in wearable electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2013
·Vol. 4
·期 8
·3966-3973
·
IF 2.562
Bo Yu,Xuecheng Xu
In situ polymerization and mechanical blending were utilized to fabricate a multi-walled carbon nanotube–polypyrrole (MWNT–PPy) nano-complex dopant for a polyvinyl chloride (PVC) matrix. A low percolation threshold in PVC for this nano-complex dopant was found. A few percent of doping sharply increases the electrical conductivity of PVC. Further doping with this nano-complex dopant still can enhance the conductivity of PVC but with a much slower rate. Based on our experimental results we propose a mechanism to explain the observed phenomenon: the complex conductive units are formed in the nano-complex dopants due to the interaction of MWNT and PPy, with conductivity close to the intrinsic conductivity of MWNT which is much higher than that of PPy. The conductivity increases significantly with a few percent of dopant. The reason is that the interaction of components becomes stronger with continuous doping, forming relatively independent conductive units. The strong doping effect makes the carrier concentration of the units increase significantly so that the conductivity grows, playing a main role in the conductive system of the composite. After the conductivity curve passes the inflection point, further doping can still enhance the conductivity but with a much slower rate. In this phase, the electron delocalization range extends; complex conductive units interconnect and generate the conductive networks; the conjugate degree of the composite increases; the large π conjugated system is built; the carrier mobility increases as well as the conductivity.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2017
·
IF 13.942
Kiran Shahzadi,Xueming Zhang,Imran Mohsin,Xuesong Ge,Yijun Jiang,Hui Peng,Huizhou Liu,Hui Li,Xindong Mu
In this article, a simple strategy was employed to fabricate bioinspired hybrid composite with carboxymethyl cellulose (CMC), graphene oxide, and reduced graphene oxide/alumina (rGO/Al) by a facile solution casting method. The tensile strength and toughness of rGO/Al-CMC-GO can reach 586.6 ± 12 MPa, 12.1 ± 0.44 MJm–3, respectively, due to the interface strengthening of alumina, which is 1.43 and 12 times higher than steel and about 4.3 and 6.7 times that of nature nacre. The artificial nacre hybrid composite is conductive due to the introduction of rGO/Al on the surface. Interestingly this structure can also be coated on the surface of cotton thread to give the thread good mechanical performance and conductivity. Additionally, the artificial nacre has better fire shielding and gas barrier properties. The oxygen permeability (OP) for 1% rGO/Al-CMC decreased from 0.0265 to 0.003 mLμm m–2 day–1 kpa–1, the water vapor permeability (WVP) decreased from 0.363 to 0.205 gmmm–2 day–1 kpa–1 when the concentration increased from 1% rGO/Al to 6% rGO/Al. It is believed this work provided a simple and feasible strategy to fabricate ultrastrong and ultratough graphene-based artificial nacre multifunctional materials.
研究领域:
材料科学
·
仿生学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Fangzhe Li,Hua Ke,Hongjun Zhang,Liwei Zhang,Jinggeng Zhao,Huijiadai Luo,Lu Cao,Dechang Jia,Yu Zhou
In this work, we presented investigations on the microstructural, magnetic, dielectric and conductive properties of (1- x )Na 0.5 Bi 0.5 TiO 3 - x CoFe 2 O 4 (NBT-CFO) composite ceramics ( x = 0.1, 0.2, 0.3 and 0.5). The composites were synthesized using the in-situ sol-gel method, and the resulting CFO/NBT embedded structure was observed in the 0.9NBT–0.1CFO sample. Rietveld refinement confirmed that the embedded structure had remarkable effects on the c / a ratios of NBT-CFO composites. Increasing normalization saturation magnetizations were observed with increasing of CFO contents, thus revealing the influence of phase interfaces on magnetism . Dielectric relaxation anomalies were observed on both temperature dependent permittivity and loss spectra. Two sets of anomalies in these spectra were caused by space charges on the phase interfaces of embedded CFO grains and the NBT matrix. The conduction behavior of ceramics with and without the embedded structure obeyed the double power law and Jonscher's fraction power law, respectively, which inferred a transformation from the AC to the DC conduction mechanism with the disappearance of the embedded structure.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 75
·61383-61389
·
IF 3.84
Hong-xin Tan,Xue-cheng Xu
We suggested a method to reduce the amount of multi-walled carbon nanotubes (MWNTs) used for fabricating polymer composites, and revealed the electron transport mechanism in polymer matrixes with different polarities. Specifically, one-dimensional (1D) hybrid nanotubes (MPPy) have been easily prepared by in situ polymerization with an appropriate ratio of pyrrole to MWNTs. Three matrixes including polyvinyl chloride (PVC), poly(methyl methacrylate) (PMMA) and polystyrene (PS) were separately blended mechanically with the MPPy nanotubes. Three families of composites (MPPy/PVC, MPPy/PMMA, MPPy/PS) achieved electrical conductivities higher than 10−5 S cm−1 at 0.3 wt%, 0.8 wt% and 1.5 wt% of MWNTs. The amounts of MWNTs were an order of magnitude lower compared to bare MWNTs used as fillers. The highly ordered chain structure of PPy grown along the surface of the MWNTs might be responsible for the good performance of the MPPy nanotubes, as indicated by FESEM, X-ray photoelectron spectroscopy and Hall Effect Measurement System analysis. We combined the doping effect and tunneling distance to explore the conductive mechanism in the three matrixes. The more potent doping effect and longer tunneling distance in the MPPy/PVC families enabled a sharp improvement of carrier concentration and therefore a lower percolation threshold, compared to that of the MPPy/PMMA and MPPy/PS families.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Fengcai Lin,Ruting Zheng,Jianwen Chen,Wenmin Su,Biying Dong,Chensheng Lin,Biao Huang,Beili Lu
A combination of conductive polymer with natural biomass is an ideal alternative to the classical conductive materials. In this study, PPy/SA/TOMFC composite hydrogels were fabricated by incorporation of TEMPO-oxidized microfibrillated cellulose (TOMFC) into the alginate-based matrix along with the in situ polymerization of pyrrole monomer. It was found that the mechanical and conductive properties of the composite hydrogels were associated with the concentration of TOMFC, which facilitated the formation of more compact 3D network structures and the growing of PPy conductive network. The mechanical properties of the synthesized hydrogels were significantly enhanced by incorporation of higher amount of TOMFC. In addition, with the introduction of 5.0 wt% TOMFC, the electrical conductivity of composite hydrogels could be ten times higher than that of PPy/SA hydrogels. Moreover, the obtained PPy/SA/TOMFC hydrogels exhibited tunable swelling properties and good biocompatibility, making them promising candidates for the use as biomaterial.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）