APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Songfeng E,Yuan Wang,Yuanming Wang,Jiaming Yang,Junli Ma,Kaiyue Huang,Zhangzi Li,Zhaoqing Lu,Lejia Wang
We discovered that incorporating the Ca 2+ into sodium alginate (SA) solution as ball-milling medium of hexagonal boron nitride ( h -BN) could increase the lateral size of the exfoliated h -BN nanosheets (BNNSs) at least twice those of pure SA solution obtained, which can be owing to the Ca 2+ −induced crosslinking of SA and enhancement of interfacial adhesion forces between SA and h -BN that not only boost the impacting resistance to milling balls but also the exfoliation energy to h -BN. Based on the crucial role of Ca 2+ in h -BN exfoliation, the large-area and small-thickness BNNSs are produced simultaneously with the increased milling speed and Ca 2+ concentration, which can be assembled into highly compact and horizontal oriented structures with aramid nanofibers (ANFs) due to the favorable compatibility, dispersity, and interfacial binding force. This kind of compact and ordered structure enables ANF/BNNS film with high thermal conductivity (TC) since the connective and high-efficiency heat conduction paths, of which the highest TC is 27.57 W⋅m −1 ⋅K -1 . Compared with soft and molecular SA chains, the ANFs show an incredible ability to guide the horizontal orientation of BNNSs for the superior TCs of their composites.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Chemistry
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2019
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IF 1.727
Song-qi Hu,Yin Wang,Lin-lin Liu
Hexagonal boron nitride (h-BN) powders were fabricated by the combustion synthesis with B/KNO3/HMX (octogen) mixtures as reactants. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were adopted to investigate the phase composition and the chemical composition of the products, respectively. The morphology and resistance to oxidation were studied by scanning electron microscopy (SEM) and thermogravimetry (TGA), respectively. The characterization results showed that the h-BN which was produced through this method has high purity and exhibits excellent resistance to oxidation. The purity of h-BN is improved with the increasing content of HMX in reactants with boron carbide (B4C) and boron oxide (B2O3) as main impurity, but conversely, the yields are obviously decreased. Taking the comprehensive consideration of the purity and the yields together, the optimal molar ratio of B/KNO3/HMX is 10 : 1 : 4. In addition, the experimental results indicated that the crystalline grain size grows with the increasing content of HMX. The method explored in this study does not need expensive processing facilities and equipment, which is a preferable approach for the laboratory to prepare h-BN of high purity.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Qiuru Bao,Ren He,Yuan Liu,Qi Wang
With the rapid improvement of microelectronics integration and assembly technology, the increasing heat flux density in electronic devices puts forward higher requirements for efficient heat dissipation and fire safety of thermal management materials (TMMS). In this work, we proposed a facile method to exfoliate and organically modify hexagonal boron nitride (h-BN) via phytic acid assisted-ball milling and self-assembly of zeolitic imidazolate frameworks (ZIF-8). And the obtained multifunctional additive (BAZF) successfully achieved the synergistic integration of highly thermal conductivity and superior fire safety in epoxy resin (EP). Besides, BAZF was also utilized as a curing agent to initiate the crosslinking reaction of EP, and the activation energy ( E α ) and kinetic parameters of curing process were obtained by the fitting of Kissinger and Crane equation. Compared to EP, the peak heat release rate (PHRR), smoke production rate (SPR) of EP composites containing 16 wt% BAZF significantly reduced by 58.2% and 47.7%, respectively, showing superior flame retardancy. Contributed by the good compatibility between fillers and matrix, BAZF significantly enhanced the thermal conductivity and mechanical properties of EP composites. As a result, this work provides a cost-effective route for the preparation of epoxy-based TMMS, which shows significant potential application in modern microelectronic industry.
研究领域:
材料科学
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热管理材料
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
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2018
·Vol. 5
·期 19
·1800750
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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
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表面工程
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产品关联
DOI
高影响因子
Crystals
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2022
·Vol. 12
·期 7
·985
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IF 2.67
Yuhan Feng,Yumin Zhang,Jipeng Liu,Ye Zhang,Yongshuai Xie
Due to its high thermal and chemical stability, excellent dielectric properties, unique optical properties, corrosion resistance, and oxidation resistance, the two-dimensional hexagonal boron nitride (h-BN) is often used in a thermal conductor protective layer in deep ultraviolet light-emitting detector fields. However, due to the complicated growth conditions of h-BN, it is often necessary to prepare h-BN by the CVD method in a high vacuum environment, which is limited to a certain extent in terms of film size and production cost. In order to solve this problem, we proposed a method to prepare h-BN thin films by atmospheric CVD (APCVD). This method does not need a vacuum environment, which reduces energy consumption and cost, and makes the operation simpler and the experimental environment safer. The preparation of high-quality h-BN film was carried out using a Cu-Ni alloy as the growth substrate. The growth process of h-BN film was studied, and the influence of growth parameters on the structure of the h-BN film was explored. The morphological features and elemental composition pairs of the samples were characterized and analyzed, which confirmed that the high-quality h-BN film could be successfully grown on the Cu-Ni alloy substrate by APCVD. The UV detection device prepared by using the prepared h-BN film as the photoresponse material had good photoresponse characteristics and performance stability. It provides a new idea for the low-cost preparation of large-scale h-BN.Keywords:APCVD;h-BN;film;photoelectric devices
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
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2025
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IF 7.9
Yuannong Qu,Ji Zou,Weimin Wang,Wei Ji,Zhengyi Fu
The h-BN/ZrO 2 composites for preparing ceramic side sealing plate were obtained with spark plasma sintering (SPS) at 1700 °C for 10 min in the study. By varying AlN content from 0 to 20 wt%, we systematically explored its influence on sintering behavior, microstructure evolution, mechanical performance, and corrosion mechanism at1600 °C. Results show that the rapid heating and uniaxial pressure during SPS and the in-situ reactions between AlN and ZrO 2 promoted the densification of composites. The main reaction products were ZrN, which acted as an effective oxygen scavenger, consuming dissolved oxygen ([O]) and converting into ZrO 2 . These newly formed ZrO 2 particles filled residual porosity within the matrix and nucleated around pre-existing ZrO 2 grains, progressively coalescing into continuous Zr-rich barrier layer.Thereby preventing molten steel from further penetrating into the matrix. The corrosion depth of the composite with 5 wt% AlN content in molten steel at 1600 °C after 2 h was only 69 μm. Meanwhile, it showed a thermal conductivity of 25 W m −1 K −1 and a coefficient of thermal expansion of 3.7 × 10 -6 K −1 , demonstrating excellent thermal shock resistance. The composites are expected to be used to manufacture side sealing plates for the novel continuous casting of thin strip.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Wei Cai,Ningning Hong,Xiaming Feng,Wenru Zeng,Yongqian Shi,Yi Zhang,Bibo Wang,Yuan Hu
The structure of hexagonal boron nitride (h-BN) is similar to that of graphite and its practical application in polymer composites is blocked by incompatible surface nature. Here, we presented a facile method to simultaneously exfoliate and organically modify h-BN nanosheets with Lewis acid-base interaction. Due to the affinity of the nitrogen atoms, the synthesized nucleophilic flame retardant (Lewis bases) bonded with boron atoms of h-BN nanosheets (Lewis acids) and facilitated the direct exfoliation of bulk h-BN. The structure and morphology of flame retardant functionalized BN (f-BN) nanosheets were well characterized. Then performances of f-BN nanosheets as advanced nanofillers in TPU composites were investigated deeply. As confirmed by SEM, XRD, and TEM, f-BN nanosheets were well-dispersed in the TPU matrix and formed strong interfacial interaction with the polymer matrix. The dramatic barrier effect of f-BN nanosheets and intrinsic flame retardant of synthesized phosphonated polyethyleneimine (P-PEI) significantly improved thermal stability, fire safety, and smoke suppression of TPU composites. By adding 5.0 wt% f-BN nanosheets, the maximum mass loss rate, peak heat release rate (pHRR), and smoke produce rate (SPR) were decreased by 20.8 %, 68.0%, and 53.6%, respectively. Moreover, the mechanical properties of TPU composites were enhanced. The self-stiffen effect of TPU composites was successfully achieved: after 108 k dynamic compressive cycles, the storage modulus of TPU/f-BN-5.0 exhibits a 13.8% increase. Based on Lewis acid-base interaction, designing a nucleophilic flame retardant to simultaneously exfoliate and functionally modify h-BN nanosheets offers a promising avenue for the preparation of functionalized BN nanosheets, thus broadening its practical application in the polymer material field.
研究领域:
材料科学
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聚合物化学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Nanqi Shi,Haiyan Li,Xin Li,Hongxin Luo,Jiaying Jin,Jiayu Wang,Shuang Li
Two-dimensional hexagonal boron nitride (h-BN) has excellent corrosion resistance and barrier ability, showing unique advantages in the field of anti-corrosion. The h-BN was assembled with Zeolite imidazolate framework material (ZIF-8) and benzimidazole (BI), and an active filler (h-BN/ZIF-8@BI) with shielding and active corrosion resistance was prepared. Zeolite imidazolate framework material was in-situ grown on h-BN surface and loaded with benzimidazole (BI), prepared an active anticorrosive filler with high shielding property (h-BN/ZIF-8@BI). The microstructure, crystal form, element composition, corrosion inhibition ability and thermal stability of h-BN/ZIF-8@BI were studied. The barrier, corrosion inhibition and anti-friction properties of EP/h-BN/ZIF-8@BI combined with F51 epoxy resin were explored. EIS test shows that the corrosion inhibition efficiency of h-BN/ZIF-8@BI is as high as 81.8 %. The impedance modulus of the steel matrix protected by the composite coating was about 2 orders of magnitude higher than that of the control sample, showing excellent barrier ability. In addition, the salt spray test proves that the composite coating has excellent corrosion inhibition characteristics. Taber testing machine shows that the wear mass loss of EP/h-BN/ZIF-8@BI coating is 34.5 % lower than that of EP coating. This work provides a novel idea for the preparation of high barrier, active anticorrosive and wear resistant anticorrosive coatings, and provides a new horizon of the composite coatings.
研究领域:
材料科学
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腐蚀防护
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2022
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IF 5.723
Ruoxuan Liang,Jiwei Li,Yaowei Wang,Zhaoxia Zhang,Bo Luan,Jianjun Liu,Shuya Qian,Shaolong Wan,Deming Zhao,Haifeng Xiong,Shuai Wang,Jingdong Lin,Yong Wang
Oxidative dehydrogenation (ODH) of n-hexane to olefins provides an alternative strategy for efficient utilization of n-hexane. Here, we report that hexagonal boron nitride (h-BN) is selective in ODH of n-hexane, achieving 89.6 % selectivity to olefins at n-hexane conversion of 16.3 % and 550 °C. We found that low temperatures and oxygen rich conditions favor the selective hydrogen abstraction from C-H bond over the cleavage of C-C bond, and the presence of gas phase free radical greatly improves the reaction rate of ODH of n-hexane over h-BN. In addition, an anomalous seagull type of relationship exists between the conversion of n-hexane and reaction temperature, which may be related to the re-distribution of the active sites.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 22
·18279-18287
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IF 3.289
Na Yang,Chen Xu,Jun Hou,Yanmei Yao,Qingxin Zhang,Maryam E. Grami,Lianqi He,Nongyue Wang,Xiongwei Qu
Polyimide (PI) has been widely used as a preferred packaging matrix material due to its low dielectricity, outstanding insulation and excellent thermal stability. Hexagonal boron nitride (h-BN) microparticles were functionalized with a silane coupling agent, 3-glycidyloxypropyltrimethoxy silane (γ-MPS), to improve the interface action with the PI matrix. The modified h-BN (m-BN) particles were used to fabricate the PI/m-BN composites with enhanced thermal conductivity by in situ polymerization. The Fourier transform infrared (FTIR) spectra, thermo-gravimetric analysis (TGA), transmission electron microscopy (TEM) and contact angle test proved that γ-MPS coupling agent molecules had been chemically grafted onto the h-BN surface. In addition, the effects of the m-BN content on the thermal conductivity of PI/m-BN composites were investigated. The composite obtained with 40 wt% m-BN particle loading presented a thermal conductivity of 0.748 W m−1 K−1, 4.6 times higher than that of pure PI. Meanwhile, the fabricated PI/m-BN composites retained excellent electrical insulation and thermal stability. The glass transition temperature values of the PI/m-BN composites decreased slightly while the storage modulus improved with the increase of the m-BN content. These results showed that PI/m-BN composites may offer new applications in the microelectronic industry because future substrate materials require effective heat dissipation.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2018
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IF 3.716
Xue Xiong,Meiling Qi
This work describes the separation performance of utilizing hexagonal boron nitride (h-BN) as the stationary phase for capillary gas chromatography (GC). The statically coated h-BN column showed moderate polarity and achieved column efficiencies of 3455 plates/m and 3800 plates/m for naphthalene and n -dodecane, respectively. With temperature-dependent structure properties, the h-BN stationary phase exhibited stronger retention for polycyclic aromatic hydrocarbons (PAHs) over phthalic acid esters (PAEs) and showed advantageous separation performance over the g-C 3 N 4 and commercial polysiloxane stationary phases. Moreover, it displayed preferential retention for halogenated analytes and high resolution performance for structural and positional isomers. In addition, the h-BN column showed good column repeatability with relative standard deviation (RSD) values of 0.03%–0.07% for run-to-run, 0.31%–0.71% for day-to-day and 2.6%–5.3% for column-to-column, respectively, and thermal stability up to 260 °C.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2019
·Vol. 136
·期 29
·47839
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IF 2.188
Xiaoqing Qiu,Zhiwei Li,Xiaohong Li,Laigui Yu,Zhijun Zhang
We first prepared a novel hexagonal boron nitride (h-BN) nanosheet filled flame-retardant coating on the surface of flexible polyurethane foams (FPUFs) by a layer-by-layer assembly method to improve the fire safety of the FPUFs. The microstructures and compositions of the coatings could be well tailored by the alteration of the concentrations of the h-BN dispersions; this resulted in obvious improvements in the thermal stability and flame-retardant properties for the FPUFs under optimal conditions. Particularly, cone calorimetry testing confirmed that the FPUFs coated with a proper amount of h-BN nanosheets effectively reduced the peak of the heat-release rate (50.1%) and CO production (53.8%) of the FPUFs, which demonstrated excellent flame-retardant performance. The excellent flame-retardant properties were attributed to the physical barrier and tortuous-path effects and anisotropic thermal conductivity of the h-BN nanosheets; these retarded the transfer and diffusion of heat toward the polymer matrix. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47839.
研究领域:
材料科学
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防火安全
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）