COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2019
·
IF 6.282
Xulong Jin,Weizhen Li,Yuanyuan Liu,Wenjun Gan
An effective and facile method was developed to construct the thermal conductive path way in BNNSs-NH 2 /epoxy/polyetherimide (PEI) ternary blends via reaction-induced phase separation (RIPS). The well dispersed BNNSs-NH 2 in the blends was prepared by the urea-functionalization process, which built a bridge to each other at the interface between epoxy and PEI phases. The through-plane thermal conductivity (TC) of composites is enhanced by 83% at low content of 1 wt% BNNSs-NH 2 . Filler thermal conductive efficiency (η) of BNNSs-NH 2 reaches 189 and 83 based on volume fraction and weight fraction, respectively. In addition, the BNNSs-NH 2 shows a critical impact on the kinetic of RIPS, which promotes the curing reaction (coarsening process) of epoxy phase. The glass transition temperatures ( T g ) of epoxy and PEI were both enhanced due to the amino group of BNNSs and its selective distribution.
研究领域:
材料科学
·
热传导工程
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Ruhao Wang,Mingjing Wang,Xu Hun
Coxsackievirus B3 (CVB3), a member of the genus Enterovirus, has high risks for incidence and mortality. Developing speedy and sensitive molecular diagnostics for CVB3 detection is challenging. Herein, a novel highly sensitive photoelectrochemical (PEC) biosensor based on nanocomposite (ZnSeNSs/AuNPs/BNNSs) modified electrode was fabricated. This biosensor relied on reverse transcription of CVB3 RNA and the rapid isothermal amplication by recombinase polymerase amplification (RPA). The amplified product was identified and linked to photoelectrode. Then biotin on the amplified product was connected to strepavidin-alkaline phosphatase (SA-ALP). The alkaline phosphatase catalyzed the hydrolysis of substrate 4-aminophenylphosphate monosodium (4-APP) to generate free 4-aminophenol which was a electron donor. An enhancing PEC signal was obtained. Therefore, a relationship between photocurrent response and CVB3 concentration was established. Under the optimal conditions, this PEC biosensor displayed a liner photocurrent response in the range of 0.1 fM ∼100 fM with a low detection limit of 30 aM. Furthermore, this strategy with satisfactory stability and selectivity provides an innovative way for CVB3 detection and lays a foundation for the research of portable devices for clinical sample processing and analysis in the further.
研究领域:
病毒学
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生物化学
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生物医学工程
·
分析化学
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产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2020
·Vol. 27
·期 2
·220-231
·
IF 1.713
Yang Tao,Liu Hui-juan,Bai Fan,Wang En-hui,Chen Jun-hong,Chou Kuo-Chih,Hou Xin-mei
Currently, developing supercapacitors with robust cycle stability and suitability for wide-temperature-range operations is still a huge challenge. In the present work, few-layer hexagonal boron nitride nanosheets (h-BNNSs) with a thickness of 2–4 atomic layers were fabricated via vacuum freeze-drying and nitridation. Then, the h-BNNSs/reduced graphene oxide (rGO) composite were further prepared using a hydrothermal method. Due to the combination of two two-dimensional (2D) van der Waals-bonded materials, the as-prepared h-BNNSs/rGO electrode exhibited robustness to wide-temperature-range operations from −10 to 50°C. When the electrodes worked in a neutral aqueous electrolyte (1 M Na 2 SO 4 ), they showed a great stable cycling performance with almost 107% reservation of the initial capacitance at 0°C and 111% at 50°C for 5000 charge—discharge cycles.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Huasong Xu,Congzhen Xie,Bin Gou,Rui Wang,Jiangang Zhou,Licheng Li
Field-grading polymer nanocomposites have drawn significant attention in high voltage electrical industries due to their excellent nonlinear conductive or dielectric properties . But composites with both nonlinear properties are rarely reported, and desirable nonlinear performance associated with excess fillers in the composite is at the expense of electric breakdown strength . In this work, BaTiO 3 nanoparticles were decorated successively using double-shell layers of TiO 2 and polydopamine, which are developed as novel nanofillers (BT@TiO 2 @PDA) for field-grading applications. Subsequently, BNNSs were prepared by liquid phase exfoliation, serving as the inhibitor of breakdown phase growth in the composites. Finally, novel epoxy nanocomposites (EP/BT@TiO 2 @PDA-OB) with BT@TiO 2 @PDA and oriented BNNSs were fabricated by a simple hot-pressing method. Results show that the hierarchically designed nanoparticles can make the composites possess not only nonlinear dielectric properties due to high ε r of BT and improved interfacial polarization , but also nonlinear conductive properties resulted from the organic semiconductor PDA shell. Nonlinear effective medium theory (EMT) was utilized to explain the nonlinear dielectric properties, and the hopping transport model considering Pool-Frenkel effect was applied to explain the nonlinear conductive properties. In addition, electric breakdown tests reveal that EP/BT@TiO 2 @PDA-OB has significantly enhanced breakdown strength (45.7 kV/mm) as compared to that of pristine epoxy resin (29.4 kV/mm) and EP/BT@TiO 2 @PDA-RB (randomly dispersed BNNSs, 36.2 kV/mm). It is expected that these results can open new avenues for the design of novel composites with both nonlinear conductive properties and dielectric properties as well as high breakdown strength.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Yue Zhang,Tiandong Zhang,Lizhu Liu,Qingguo Chi,Changhai Zhang,Qingguo Chen,Yang Cui,Xuan Wang,Qingquan Lei
High-performance energy storage materials are of essential importance in advanced electronics and pulsed power systems, and the polymer dielectrics have been considered as a promising energy storage material, because of its higher dielectric strength and more excellent flexibility compared with that of inorganic ceramic dielectrics. However, the energy storage capability of pristine polymer has been limited by its low intrinsic dielectric permittivity and ordinary ferroelectric performance. Herein, this work demonstrates a favorable method to achieve a sandwich-structured poly(vinylidene fluoride) (PVDF)-based composite by the electrospinning, solution casting, thermal quenching, and hot-pressing process. This innovative method combines with the 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZT-BCT NFs), which possesses good ferroelectric hysteresis, and the hybrid particles of hexagonal boron nitride nanosheets (BNNSs) coated by ferroferric oxide (Fe3O4@BNNSs), which hold high breakdown strength (Eb). It is worth mentioning that the Fe3O4 particles disperse well on the surface of BNNSs to form the dipoles with the BNNSs at the interfacial region, resulting in an enhancement of the electric displacement and the dielectric permittivity of the composite. Furthermore, the influence of the volume fraction of filler particles on the electrical performance of composite was systematically investigated. Notably, the enhanced performance in terms of electric displacement (D), Eb, and discharged energy density (Ue) was achieved in the sandwiched BZT-BCT NFs-PVDF/Fe3O4@BNNSs-PVDF/BZT-BCT NFs-PVDF composite. The Ue of ∼8.9 J/cm3 was achieved at 350 kV/mm, which was 740% higher than the Ue of biaxially oriented polypropylene (BOPP, Ue ≈ 1.2 J/cm3 at 640 kV/mm). Of particular note is that the hybrids Fe3O4@BNNSs play a critical role to enhance the D and Eb and suppress the remnant displacement (Dr) of sandwiched composite. This contribution proposes an efficient and scalable method to prepare polymer-based dielectric composite for the demanded applications.
研究领域:
材料科学
·
电子工程
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
FirePhysChem
·
2026
·
IF 5.1
Qianyuan Yi,Xi He,Dandan Ji,Ao He,Chunlin Chen,Jinpeng Shen,Zhaoqian Li,Bo Wu,Chonghua Pei
NC/BNNSs composites with BNNSs addition ranging from 0 wt% to 0.4 wt% were prepared by 3D printing. The microstructure, combustion performance and mechanical properties of NC/BNNSs composites were characterized using field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS), differential scanning calorimeter (DSC), high-speed photography, bomb calorimeter and tensile strength testing. Results show that BNNSs have a diameter ranging from 20–350 nm and a thickness of 2.6 nm. The morphology of NC/BNNSs composites is regular, and there is no obvious interface between the internal layers. With the increase of BNNSs content in the NC/BNNSs composites, its initial thermal decomposition and exothermic peak temperature gradually decrease. Compared with pure NC, the activation energy of NC/BNNSs is significantly reduced after adding BNNSs. The minimum activation energy was observed for 0.1% BNNSs, with a value of 173.3 kJ·mol⁻¹, which is a decrease of ∼123 kJ·mol⁻¹ compared to that of NC. The maximum combustion rate of NC/BNNSs with 0.2% BNNSs was 12.7 mm·s⁻¹, which increased by 3.4 mm·s⁻¹ compared with the combustion rate of NC (9.3 mm·s⁻¹). The heat of combustion gradually decreases, while the tensile strength gradually increases.
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 43
·e57679
·
IF 2.8
Wenchao Shi,Xuanlin Li,Shili Zhao,Tian He,Bi Yang,Beibei Chen
Developing low-friction, high wear-resistant epoxy-based self-lubricating composites is crucial for reducing friction and wear in transmission components of advanced equipment. However, the shortcomings of brittleness in hence and poor wear resistance of epoxy limit its tribological application under harsh sliding conditions. In this study, the nanohybrid of h-BN nanosheets (BNNSs)-supporting-α-Fe 2 O 3 was designed to harness their synergistic reinforcement and lubricating effect on the tribological performance of epoxy. The feature of α-Fe 2 O 3 /BNNSs was analyzed, and its tribological enhancement on epoxy nanocomposites was explored systematically. Results demonstrated that the α-Fe 2 O 3 of size less than 50 nm was uniformly loaded on the BNNSs surface to form a rough microstructure, which was conducive to perfecting the interfacial compatibility of the epoxy composite. Moreover, the α-Fe 2 O 3 /BNNSs significantly improved the capacity for antifriction and anti-wear of epoxy. Only by filling 0.7 wt% α-Fe 2 O 3 /BNNSs, the coefficient of friction (COF) of the corresponding composite coating was reduced by 85.1%, and its wear rate was significantly reduced, nearly 96.7%. More importantly, the epoxy-0.7 wt%α-Fe 2 O 3 /BNNSs kept reasonable tribological performance under high loads/speeds. By analyzing the worn surface of friction pairs, the tribological synergism of α-Fe 2 O 3 /BNNSs on epoxy coatings was discussed. This study might offer novel insights into the design of high-performance epoxy self-lubricating nanocomposite coatings.
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Jiaye Li,Beibei Chen,Zhe Dong,Bi Yang,Shu Qiu,Hao Zhang,Shuang Wang,Kan Zhang
The application of epoxy (EP) self-lubricating composite coatings to the surface of mechanical parts has attracted attention increasingly, since they are beneficial for extending the lifetime of equipment by decreasing friction and wear. However, the shortcoming of poor wear resistance of EP is a limited factor in tribology . In the present study, the hard hexagonal boron nitride nanosheets (BNNSs) supported soft metal of Ag nanoparticles (Ag NPs) was constructed to strengthen the tribological performance of EP. The BNNSs was firstly prepared after h-BN being treated by NaOH/KOH solution, and then Ag NPs were uniformly anchored on the BNNSs surface through hydrothermal method . The achieved BNNSs/Ag surface had rough microstructure and active sites, which were conducive to the interfacial compatibility between BNNSs and EP. The tribological test results demonstrated that the lubricity and wear resistance of EP coating were improved significantly by BNNSs/Ag. Especially as the weight fraction of BNNSs/Ag was 0.7 %, the corresponding composite coating showed an 80.5 % and 86.4 % reduction in the friction coefficient and wear rate compared to EP coating, which was mainly because of the good interfacial interaction in the composite coating, the “hard-soft” synergistic reinforcing and lubricating effect of BNNSs/Ag, as well as self-lubricating property of transfer film. Furthermore, the tribological behaviors of BNNS/Ag/EP composite coating under pure water and oil lubrication were investigated comparatively. The enhancement mechanism of BNNSs/Ag was proposed by analyzing the worn surface of composite coatings and counterparts.
研究领域:
材料科学
·
摩擦学
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 5
·期 19
·1800750
·
IF 4.834
Chao Teng,Yucai Lin,Yanli Tan,Jian Liu,Lei Wang
Copper is one of the most widely used materials in industrial applications, such as electric power, electronics, and mechanical engineering fields. However, under high humidity, high temperature environment, acid, base, and salt solutions, the copper is vulnerable to destruction, which induces the oxidation and corrosion of copper surface. For circumventing these problems, a robust hydrophobic hexagonal boron nitride nanosheets (BNNSs) coating is facilely prepared through integrating the methods of liquid exfoliation, interface self-assembly, and physics vapor deposition. The coating can prevent the copper to be oxidized at temperature as high as 500 °C. The corrosive droplets on the coating surface keep in Cassie's state and cannot penetrate into the valley of the topography, which effectively prevents the electrochemical corrosion at the interface between copper and the coating materials even under the DC voltage of 10 V. This finding sheds light on large-scale constructing of oxidation/corrosion-resistant coating for copper base materials toward practical industrial application.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 11
·2300006
·
IF 2.5
Hongliang Duan,Jiawei Ji,Chaochao Cao,Wenjuan Bai,Zirui Song,Yanming Xue,Chengchun Tang
Due to its excellent physical barrier behavior and high physicochemical stability, hexagonal boron nitride (h-BN) can improve the anti-corrosion capacity of a favorite protective coating onto metals. However, the poor dispersion of h-BN filler in the formation of polymer composites does not promote its further wide application in the field of corrosion protection. In this work, a new CeO 2 @BNNSs filler is highly dispersed into aqueous epoxy (EP) to make nice coatings onto steels. As a result, after immersing them into an NaCl solution of 3.5 wt% for 20 days, the as-prepared CeO 2 @BNNSs/EP composite coatings can keep an impedance modulus (|Z| f = 0.01 Hz ) value of 9.61 × 10 7 Ω cm 2 , which is larger than those of the blank EP and the EP filled with the h-BN and BNNSs fillers. In addition, compared to the EP, h-BN/EP, and BNNSs/EP coatings, the higher corrosion potential, the properties of larger polarization resistance, and lower corrosion current density for the CeO 2 @BNNSs/EP coatings indicate CeO 2 @BNNSs/EP's excellent protective ability to the steel from corrosion. It is believed that this kind of CeO 2 @BNNSs/EP composite materials and its coatings would be highly promising for application in future advanced anti-corrosion environments and devices.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yuanxia Wang,Xiangju Liu,Nazhen Liu,Chen Guo,Yongchao Dai,Ziang Su,Quantong Jiang,Xia Zhao,Baorong Hou
Nacre-inspired coatings reinforced with amino-functionalized boron nitride nanosheets (NH 2 –BNNSs) were developed in this work. A hierarchical “brick and mortar” structure, where NH 2 –BNNSs act as “bricks” and epoxy resin act as “mortar”, was developed attributed to electrostatic repulsion between NH 2 –BNNSs modified by sodium carboxymethyl cellulose. In nacre-inspired coatings, penetration path of corrosive species must travel to reach metal surface was extended significantly, leading to hindered metal corrosion. Electrochemical impedance spectroscopy demonstrated | Z | f =0.01 Hz of aluminum alloy (AA5052) covered by nacre-inspired coating (NC-20) was 4 orders of magnitude higher than that of AA5052 covered by pure epoxy coating after 84 days of exposure in NaCl solution.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
高分子复合材料
·
纳米复合材料
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Fujia Chen,Baoming Xiang,Jianfeng Li,Yujiu Zhou,Yuetao Zhao,Hu Ye,Yajie Yang,Jianhua Xu,Yuanjie Su
Poly(vinylidene fluoride) (PVDF) polymers are considered as promising high energy density capacitor dielectrics because of their high dielectric constants and melt processability. However, their industrialization and practicalization suffer from low breakdown strengths and high leakage conduction losses. Hence, it is of great necessity to develop dielectrics with a high energy storage capability. Herein, we fabricated biaxially oriented nanocomposite PVDF films decorated with ultralow contents of surface-functionalized boron nitride nanosheets (BNNSs) by combining melt blending and biaxial orientation technology. The functionalized BNNSs exhibited an ideal horizontal distribution. Both experimental characterization and phase-field simulation validate that the horizontally distributed BNNSs effectively inhibit the propagation of the dielectric breakdown phase and reduce the leakage conduction loss of the composite films. The breakdown field strength of the nanocomposite film doped with only 0.1 wt % functionalized BNNSs reached up to 755.94 MV/m, which is 16.8% higher than that of the pristine biaxially oriented PVDF film. Meanwhile, a maximum discharge energy density of 15.66 J/cm3 was attained, which was 1.57 times that of the pristine counterpart (9.98 J/cm3). This study sheds light on the fundamental understanding of dielectric breakdown behavior of polymer nanocomposites and provides a promising strategy for the scaled-up fabrication of dielectric capacitors with high insulating and low loss properties.
研究领域:
材料科学
·
高分子物理
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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）