COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2020
·
IF 6.444
Baowei Qiu,Tong Sun,Muxuan Li,Yang Chen,Shengtai Zhou,Mei Liang,Huawei Zou
The interface performance of carbon fiber (CF) reinforced polymer composites (CFRPs) is one of the key factors that affect their properties. In order to improve the interface adhesion between CF and epoxy (EP), a green method is proposed. Carboxymethyl cellulose (CMC) and graphene oxide (GO) are introduced to the CF surface through the hydrogen bonds, and they can form high micromechanical interlocking composite architectures, which can enhance the micromechanical interaction in the interface of CF and EP. It is found that CMC and GO can significantly improve the interfacial shear strength (IFSS) and interlaminar shear strength (ILSS) of EP/CF composite. This means that it has great potential to improve the interface of CFRPs and strengthen their performance by natural cellulose fibers. This modification method does no harm to CF and is environmental friendliness, which lays a research foundation for using natural cellulose to enhance the interface performance of CFRPs.
研究领域:
复合材料科学
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高分子材料
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界面工程
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纳米材料
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绿色制造
✓ 已验证
DOI
高影响因子
Advanced Sustainable Systems
·
2024
·Vol. 8
·期 8
·2400098
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IF 6.5
Fuyu Xiao,Wenbin Lai,Shihan Zeng,Lingjun He,Mingyang Ge,Fenqiang Luo,Peixun Xiong,Hui Lin,Chuyuan Lin,Yongjin Luo,Jixiang Zhang,Qingrong Qian,Qinghua Chen,Lingxing Zeng
The resource scarcity and pollution leakage risk caused by discarding the spent power lithium-ion batteries has aroused growing concern. Recovering and regenerating the cathode material from spent power lithium-ion batteries in an easy and environmentally friendly manner remains a significant challenge and an area of focus in battery research. Hence, a green and convenient method to recover FePO 4 from spent LiFePO 4 cathode powder by using Na 2 S 2 O 8 as an oxidizer and as cathode materials for lithium/sodium-ion batteries (LIBs/SIBs) is reported. Benefiting from the remarkable graphene oxide (GO) and vanadium oxide (V 2 O 5 ) coating, the regenerated FePO 4 –V 2 O 5 –graphene oxide (FePO 4 –V 2 O 5 –GO) is suitable for Li/Na storage (153 mAh g −1 at 0.2C/118 mAh g −1 at 0.5C). The high capacity retention, that stable for 300 cycles in LIBs and 300 cycles for SIBs, is also realized due to the stable structure. This work provides a green strategy for regenerating the cathode of spent lithium-ion batteries and designing cathodes of alkali metal ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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环境科学
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资源回收
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纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
CARBON
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2018
·
IF 7.082
Yiwen Hu,Yongxin Wang,Zhixiang Zeng,Haichao Zhao,Xuewu Ge,Kai Wang,Liping Wang,Qunji Xue
Dispersion of Graphene in water is conducive to their practical applications as lubricating additive in water-based fluids due to their safety, low cost and environmental-friendliness. But owing to its hydrophobicity , it is difficult to achieve stable aqueous graphene suspension. Here, we use the Toluene-2,4-diisocyanate as bridging agent between hydrophilic Poly (ethylene glycol) (PEG) and ethanolamine to prepare the amino-containing PEG (PEG-NH 2 ), followed by covalently grafting PEG-NH 2 onto the surface of carboxylaed graphene (G-COOH) nanosheets to synthesize the PEGlated graphene (PEG-G) via facile amidation under mild conditions. The physical, chemical properties of product were characterized by Fourier transformed infrared spectra (FTIR), Raman spectra , X-ray photo electron spectroscopy (XPS) and so on. Transmission electron microscopy (TEM) and scanning probe microscope (SPM) were utilized to observed the morphology of G-COOH and PEG-G. The frictional properties of PEG-G as nanoadditive of water-based lubricant were characterized by UMT-3 tribometer, following with analyzes on wear surfaces by 3D laser scanning confocal microscopy . Based on the results of characterization, the PEG-G was prepared successfully and the dispersion shows superior friction-reducing and anti-wear properties owing to the formation of fluid adhesive film and carbon protective film, especially the concentration of PEG-G in water is 0.05 wt%.
研究领域:
材料科学
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纳米科技
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表面工程
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摩擦学
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高分子化学
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应用化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
·
IF 3.131
Shengguo Zhou,Wentao Li,Wenjie Zhao,Chao Liu,Zhiwen Fang,Xiulei Gao
As one of the youngest graphene derivative, fluorinated graphene (FG) with excellent mechanical strength and lubricity was incorporated into polyimide polymer (PI) to strengthen the comprehensive performance of nanocomposite . This article gives a detailed characterization to investigate the tribological behaviors of PI/FG nanocomposite films under different friction conditions including both of dry sliding and seawater lubrication . Firstly, the chloroform-treated FG was proved to be stably dispersed in the PI matrix . Subsequently, mechanical properties, thermal stability and tribological properties of PI/FG nanocomposite films were greatly improved. Finally, analysis of the reasons for the significant improvement in wear resistance from the viewpoint of thermal, mechanical properties and the evolution of friction products. Meanwhile, the transfer of FG from polymer matrix to frictional duality was revealed during tribological testing. The above results suggest the potential application of FG in the field of reinforcing polymer friction properties.
研究领域:
材料科学
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高分子材料
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表面工程
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摩擦学
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纳米复合材料
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Ping He,Yu Zhang,Zhenguo Wang,Peng Min,Zhiming Deng,Lulu Li,Lvxuan Ye,Zhong-Zhen Yu,Hao-Bin Zhang
Graphene has been widely studied for its excellent properties of outstanding conductivity, strength , and flexibility. However, interlayer defects formed during the macroscopic assembly of graphene nanosheets will severely degrade the performance of graphene films. Herein, a strategy combined with trace carboxyl graphene oxide (GO), mild reduction, and chemical crosslinking is employed to minimize the interlayer defects for enhancing both the conductivity and mechanical strength of graphene films. The trace carboxyl feature of GO allows nanosheets to assemble orderly into highly oriented GO films . Subsequently, the mild chemical reduction preserves the highly oriented and packed microstructure. Coupling with further crosslinking by introducing conjugated molecules with pyrene terminal groups (1-pyrene butyric acid-1,6-hexane diamine, PHD) to provide extra π-π bonds, both the mechanical strength and conductivity of graphene films are improved to 548.4 MPa and 1.7 × 10 5 S m −1 , respectively. In addition, the graphene film with only ∼2 μm in thickness possesses an excellent electromagnetic interference shielding effectiveness (EMI SE) of ∼40 dB and a specific shielding effectiveness of up to 74 278 dB cm 2 g −1 in a wide frequency range of 8.2–40.0 GHz. Thus, this study provides an energy-saving fabrication route for mechanically strong, effective thermal management and EMI shielding films.
研究领域:
材料科学
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纳米科技
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高分子化学
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功能材料
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电磁屏蔽
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热管理
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2012
·Vol. 1
·期 6
·2278-2285
·
IF 0
Jun Zhou,Ming Chen,Guowang Diao
An amphiphilic amino resorcinarene (T) was modified onto the surface of graphene oxide (GO) through covalent bond forces and non-covalent bond forces to prepare GO–T. The water-soluble graphene–T (GN–T) composite was prepared by the reduction of GO–T. Then, pre-prepared platinum nanoparticles (PtNPs) and different sized gold nanoparticles (AuNPs) could self-assemble onto the surface of GN–T through the plentiful amido groups of T to obtain GN–T–AuNPs and GN–T–PtNPs hybrid materials. It was verified that the AuNPs and PtNPs could be uniformly scattered on GN and the amount of AuNPs and PtNPs modified on GN could be adjusted by changing the weight ratio of T/GO. GN-T-PtNPs and GN-T-AuNPs composites showed the characteristics of being dispersible, stable and recyclable in water. Electrochemical results obviously revealed that GN–T–AuNPs and GN–T–PtNPs composites exhibited outstanding electrocatalytic properties.
研究领域:
纳米材料化学
·
电分析化学
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功能复合材料
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表面自组装
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电催化
✓ 已验证
DOI
ADVANCED POWDER TECHNOLOGY
·
2019
·Vol. 30
·期 9
·1920-1931
·
IF 3.25
Ting Wang,Bing–rui Li,Li–guang Wu,Yu–bing Yin,Bo–qiong Jiang,Ju–qing Lou
La 3+ - or Yb 3+ -doped TiO 2 supported on the surface of reduced graphene oxide were fabricated by adsorbed-layer nanoreactor synthesis (ANS) coupling with a solvothermal treatment to extend photocatalysis application in the advanced treatment of simulated wastewater with high salt concentration. Results showed that La 3+ or Yb 3+ could distribute in the TiO 2 lattice, only in ANS preparation with graphene oxide as the carrier, to replace Ti 4+ during the solvothermal treatment, thus introducing TiO 2 mixed-crystal and heterojunction structures in the catalysts. La 3+ or Yb 3+ caused lattice distortion structures and anionic vacancies in the TiO 2 lattice. The anionic vacancies (oxygen vacancies) might generate Ti 3+ in catalysts, thus enhancing visible-light response, due to impurity levels introduced by La 3+ or Yb 3+ . As the strong adsorption capability of the catalyst for phenol was not interfered by salt ions in the simulated wastewater, the catalysts could efficiently degrade phenol. The highest removal rate of phenol was approximately 90%.
研究领域:
环境科学
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材料化学
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光催化
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水处理
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纳米材料
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表面化学
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环境功能材料
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Xiangli Gao,Gaoyi Han,Yunzhen Chang,Ying Zhang,Honggang Li
To enhance the reduced graphene oxide hydrogels' capacitive performance, many modifiers are used to add doped element into the materials and improve the structure. The isomers of aminophenol which contain amino and hydroxyl groups on the benzene ring are employed as structure regulator and modifier to synthesize high-performance reduced graphene oxide hydrogels. The influences of preparation conditions including ratios of graphene oxide to aminophenol isomers, temperature, reaction times on the samples’ structure and properties have been investigated. The results show that the oligomer of o-aminophenol is formed on reduced graphene oxide sheets while the molecules of p, m-aminophenol are bound to the sheets; and that the hydrogel prepared in the presence of p-aminophenol has larger specific surface area, total pore volume , specific capacitance and good rate capability (74.0% of 427.0 F g −1 retains at 100 mV s −1 ) than other. The cells assembled by the optimized hydrogels exhibit the energy density of 14.07 Wh kg −1 at power density of 124.3 W kg −1 , and 4.96 Wh kg −1 at 6.78 kW kg −1 . Furthermore, 92.2% of initial capacitance can be retained after 20,000 cycles for the cells assembled by the optimal hydrogel. This kind of material may be found its use in energy storage field.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
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高分子化学
·
表面科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Guorong Hu,Jilin Wu,Ke Du,Zhongdong Peng,Ming Jia,Hao Yang,Yanbing Cao
The surface-fluorinated Li 4 Ti 5 O 12 nanowires/reduced graphene oxide composite is synthesized through a hydrothermal procedure. Lithium ion transport is promoted by forming a special morphology of lithium titanate nanowires, meanwhile, electronic transmission is facilitated by surface fluorination and conductive network of graphene coating. These three kinds of synergistic effects greatly improve the rate performance of lithium titanate . The surface-fluorinated Li 4 Ti 5 O 12 nanowires/reduced graphene oxide composite exhibits high specific capacities (167.5 mAh g −1 at 1 C and even 132.6 mAh g −1 at 10 C) and good cyclic stability (95% capacity remain after 300 cycles at 5 C). The influences of surface fluorination and graphene coating on electrochemical performance of lithium titanate are investigated in detail in terms of reversible capacity, cyclability and rate capability. Its excellent electrochemical properties make it become possible to be a potential anode material for high-rate lithium-ion batteries applied in high power facilities.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 25
·16785-16794
·
IF 4.123
Wei Xia,Jun Zhao,Tao Wang,Li Song,Hao Gong,Hu Guo,Bing Gao,Xiaoli Fan,Jianping He
Polymer networks such as those of epoxy resin, as common protection materials, possess radiolytic oxidation degradation effects under gamma irradiation environment, which have a great accelerating effect on the ageing rate and severely limit their potential applications for metal protection in the nuclear industry. To overcome this, we report a simple scheme of anchoring crystalline ceria nanoparticles onto graphene sheets (CG) and incorporate it into the epoxy resin, followed by thermal polymerization to obtain CeO2/graphene-epoxy nanocomposite coating (CGNS). We had proven that graphene might act as “interwalls” in the epoxy matrix, which will result in space location-obstruct effect as well as absorb the radicals induced by γ-ray irradiation. Moreover, owing to the interconversion of cerium ions between their +3 and +4 states coupled with the formation of oxygen vacancy defects, electron spin resonance (ESR) detection shows that CeO2/graphene (CG) could act as a preferable radical scavenger and achieve better performance in trapping radicals than single graphene based composite. Electrochemical data strongly demonstrate that CeO2/graphene is capable of maintaining the anti-corrosion properties under gamma irradiation environment. Therefore, the designed hybrid CeO2/graphene-epoxy composite can be considered as potential candidates for protective coatings in nuclear industry.
研究领域:
材料科学
·
核工业防护
·
高分子化学
·
纳米复合材料
·
电化学防腐
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 14
·20310-20316
·
IF 4.527
Yang Yan,Linlin Zang,Tianwei Dou,Haicheng Li,Liguo Sun,Yanhong Zhang
In this work, we prepared a hollow Co 3 O 4 nanoparticles (NPs) immobilized reduced graphene oxide (rGO)/carbon monolith (HCGCM) via a one-step carbonization method. The doping of nanomaterial and transition metal oxide can improve the poor conductivity and low capacitance of pure carbonaceous materials. The optimal addition concentration of polystyrene microspheres as a template provided the HCGCM composite with a hierarchical pore structure and a large specific surface area (1600 cm 2 /g), which is conducive to generating sufficient electroactive sites. At the same time, three dimensional (3D) interconnected pores shorten ion transport paths and reduced diffusion resistance of ions. Due to the existence of pseudocapacitive behavior, the HCGCM composite, as an electrode material working in a three-electrode system, achieved a high capacitance value of 1106 F/g at a current density of 1 A/g. In two-electrode system, the asymmetric supercapacitor had excellent stability performance and remained about 86.7% capacitance after 5000 cycles test. Moreover, it also exhibited a maximum energy density of 66.7 Wh/kg at power density of 750 W/kg. Thus, the strategy of manufacturing 3D porous electrodes is beneficial to improve the overall electrochemical performance of supercapacitors .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2015
·
IF 2.219
Taotao Feng,Xiaoyu Chen,Xiuwen Qiao,Zhao Sun,Haining Wang,Yu Qi,Chenglin Hong
In this work, a simple electrochemical immunosensor was developed for the detection of carcinoembryonic antigen (CEA) based on rhombic dodecahedral Cu 2 O nanocrystals–graphene oxide–gold nanoparticles (rCu 2 O–GO–AuNPs). GO as the template and surfactant resulting in rCu 2 O exhibit improved rhombic dodecahedral structure uniformity and excellent electrochemical performance. Moreover, GO was found to be able to effectively improve the long stability of rCu 2 O on the electrode response . Under optimal conditions, the immunosensor showed a low limit of detection (0.004 ng ml −1 ) and a large linear range (0.01–120 ng ml −1 ). This work presents a potential alternative for the diagnostic applications of GO-supported special morphology materials in biomedicine and biosensors.
研究领域:
生物医学工程
·
肿瘤学
·
纳米医学
·
电化学分析
·
诊断学
·
生物传感器
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）