POLYMER COMPOSITES
·
2023
·Vol. 44
·期 10
·6440-6453
·
IF 5.2
Bi Yang,Beibei Chen,Wenquan Dong,Yang Tong,Jiaye Li
Polymer self-lubricating composite coatings have been widely used on the surface of machinery to extend the life of the moving systems/parts by controlling friction and wear. In this work, epoxy nanocomposite coating with the thickness of about 60 μm was fabricated with addition of hexagonal boron nitride nanosheets (BNNSs)/CeO 2 nanohybrid for enhancement in antifriction and wear resistance. The active BNNSs were first obtained by exfoliating h-BN with alkaline solution, and then the rare earth oxide of CeO 2 nanoparticles were immobilized on the surface of BNNSs through hydrothermal method. The microstructure morphology and chemical composition of as-proposed BNNSs/CeO 2 were characterized by field emission scanning electron microscopy, HRTEM, Fourier transform infrared spectroscopy, RS, X-ray diffraction, and X-ray photoelectron spectroscopy. And the tribological behaviors of epoxy nanocomposite coatings containing BNNSs, CeO 2 , and BNNSs/CeO 2 were investigated comparatively using ball-on disc friction tester (MPX-3). And the 440C stainless-steel ball with diameter of 8 mm was used as the counterface material. Tribological tests showed that epoxy-BNNSs/CeO 2 had the best friction and wear reduction properties, and the lowest coefficient of friction and wear rate of epoxy-based composite coating were achieved when the content of BNNSs/CeO 2 was 0.5 wt%, with 84.9% and 96.3% reduction, respectively. Moreover, the effect of sliding conditions on the tribological performance of epoxy-BNNSs/CeO 2 was investigated. The corresponding enhancing mechanisms of BNNSs/CeO 2 were discussed as well.
研究领域:
材料科学
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摩擦学
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表面工程
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Xinyu Cheng,Yi He,Yi Fan,Liping Yan,Huilian Zhou,Jiamin Zhong,Zhiyuan Li,Jinxue Song
PDA-functionalized h-BN nanomaterials (Ph-BN) were used to reinforce the electrodeposited Ni W coatings. Compared with the h-BN nanomaterial, Ph-BN has better dispersion in the plating solution, which can effectively improve the mechanical and corrosion resistance of the coating. Compared with the Ni W coating, the microhardness value of the Ni-W/Ph-BN coating (662.8 Hv) was increased by 33.47 % and the friction coefficient (0.382) was reduced by 41.86 %. This is due to the special ceramic composite layered structure of Ph-BN namely the combination of flexible unit PDA structure and rigid unit h-BN structure, which will synergistically hinder the shedding of the coating during the friction process and help to improve the wear resistance of the coating. The R ct value of Ni-W/Ph-BN is 34,500 Ω•cm 2 , which is 105.36 % higher compared to Ni W coating. Ni-W/Ph-BN also has the smallest corrosion rate (0.0465 mm•a −1 ), which is 45.74 % lower relative to Ni W coating. The uniformly dispersed Ph-BN nanosheets in the coating prolong the corrosion path for corrosive ions. Besides, the PDA has the effect of anchoring Fe 2+ / Fe 3+ , which will be beneficial for the composite coating corrosion resistance improvement.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xihui Cheng,Pengcheng Wang,Jiwei Li,Na Wang
In the field of human thermal comfort management, the development of functional textiles plays a critical role in enhancing human health and energy efficiency. Although significant progress has been made in human thermal management textiles, the construction of radiative cooling textiles with superior wearing comfort remains a considerable challenge. In this work, we present a trilayer-structured fabric composed of an electrospun polyvinylidene fluoride-hexafluoropropylene/hexagonal boron nitride (PVDF-HFP/h-BN) nanofibrous membrane (NFM) as the underlying layer, a magnetron sputtered aluminum (Al) film as the intermediate layer, and a sprayed JF-6011 coating as the upper layer. The obtained composite JF-Al 20 @P/h-BN 7.5 NFM features a well-regulated micro-nano porous structure and distinctive optical properties, achieving a solar reflectance of 94.33 % and an atmospheric window emissivity of 92.63 %. Under a solar irradiance of approximately 950 W/m 2 , the skin simulator covered with the JF-Al 20 @P/h-BN 7.5 NFM showed temperature reductions of 13.5, 13.3, and 8 °C compared to those covered with commercial cotton, nylon, and polyester fabrics, respectively. Additionally, the composite NFM possesses unidirectional moisture transport capabilities while maintaining excellent air permeability (331.75 mm/s) and moisture vapor transmission rate (7.98 kg/m 2 /D). This study provides valuable insights into the design of thermally comfortable textiles for high-temperature environments.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Sen Liu,Shuaishuai Wu,Beibei Tang,Mao Chen,Yongqiang Chen,Hailong Wang,Rui Zhang,Bingbing Fan
High-density h-BN@SiC/ZrO 2 composites with different ZrO 2 contents were prepared by hot-pressing. The microstructure, flexural strength, thermal shock behavior, thermal expansion properties and corrosion resistance of the composites in molten steel were systematically investigated. The construction of the h-BN@SiC core-shell structure is conducive to the formation of a uniform and continuous network structure during the sintering process. This significantly improves the sintering performance of h-BN-based materials and enables the low-temperature preparation of high-density products. Moreover, the uniform distribution of SiC can effectively coordinate the thermal matching between h-BN and ZrO 2 , significantly improving the high-temperature performance of the material. During the corrosion process, the SiC network structure can effectively bind ZrO 2 and BN particles, effectively resist the erosion of high-temperature molten steel, and its erosion resistance increases with the increase of ZrO 2 content. Especially, when the ZrO 2 content reached 40%, the erosion depth of the sample was merely 160.61 μm after being immersed in static molten steel for 120 min. Moreover, the h-BN@SiC/ZrO 2 composite with 30 wt% ZrO 2 demonstrates superior comprehensive performance: It achieves a flexural strength of 159.63 MPa, retains 87.08% of its original strength after thermal shock testing, exhibits a low apparent porosity of 3.37%, and possesses an average coefficient of thermal expansion as low as 3.95 × 10 −6 /K −1 . The comprehensive properties of h-BN@SiC/ZrO 2 composites were obviously improved by SiC network structure.
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高影响因子
Thermal Science and Engineering Progress
·
2026
·
IF 5.6
Xiaoru Huang,Shengmao Zhang,Chao Ju,Gaiqing Zhao,Qin Zhao,Xiaobo Wang
h-BN is modified via synergistic KH550 and Span 80. BNKS nanosheets sustain stable dispersion in ester oil 1190 for 7 days. • BNKS nanofluids show less viscosity rise. BNKS-5 has 8.27% higher thermal conductivity (0.1693 W·m −1 ·K −1 , 20 ℃) vs ester oil. • BNKS-5 nanofluid lowers battery module maximum temperature difference to 4.80 °C at 4 L/min. Immersion cooling technology enables efficient heat dissipation through direct heat exchange between coolants and components. Ester oils are considered potential cooling media owing to their biodegradability and excellent thermal stability; however, their low thermal conductivity limits further improvement in cooling performance. Thus, this study proposed and implemented a synergistic mechanism combining chemical bonding and physical adsorption through the surface modification of h-BN with KH550 and Span 80. Nanofluids were prepared using ester oil 1190 as the base fluid, and their dispersion stability, rheological properties, and thermal conductivity were evaluated. Numerical simulations were further conducted to assess the cooling performance of the BNKS nanofluid in an immersion cooling system. The results demonstrated that the modified BNKS nanosheets exhibited improved short-term dispersion stability in ester oil 1190 compared with h-BN, maintaining stable dispersion after 7 days of static sedimentation. Moreover, surface modification reduced the viscosity increase of high-concentration nanofluids. At 20 °C, the BNKS-5 nanofluid achieved a thermal conductivity of 0.1693 W·m −1 ·K −1 , corresponding to an 8.27% enhancement compared with ester oil 1190. At a flow rate of 4 L/min, the BNKS-5 nanofluid decreased the maximum temperature difference of the battery module to 4.80 °C and maintained an average temperature of 26.78 °C, indicating enhanced temperature uniformity and cooling performance. This study proposed a synergistic surface modification strategy that integrated KH550-induced chemical bonding with the physical adsorption of Span 80 to improve the dispersion stability and thermal transport properties of ester oil-based h-BN nanofluids, highlighting their potential for immersion cooling applications.
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高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2025
·
IF 4.6
Xu Xia,Chenyang Ma,Tianen Yang,Zhiyuan Ma,Yu Cao,Jiahuan He,Qiwen Zheng,Huaping Hong,Ji Xiong
This study investigates gradient cemented carbide with a cubic phase-free surface layer (CFL), commonly used as substrates for coated inserts to extend their service life. The tough gradient surface layer effectively prevents crack propagation, minimizing coating delamination and edge chipping. We propose using hexagonal boron nitride (h-BN) as a non-cubic nitrogen source for fabricating gradient cemented carbide with cubic (W,Ti)C, as a replacement for traditional cubic nitrogen sources. By employing powder metallurgy, we successfully created gradient cemented carbide with a CFL derived from h-BN. We also analyze the mechanism of gradient structure formation and characterize the microstructure, elemental distribution, and mechanical properties of the novel materials. The results demonstrate the feasibility of producing gradient cemented carbides with a CFL when h-BN is used as the nitrogen source. The crystal orientations at the gradient boundary are randomly distributed, showing no abrupt interface between the surface layer and the interior. Notably, titanium (Ti) and boron (B) are nearly absent in the surface layer, while cobalt (Co) shows higher concentration compared to the interior. The use of h-BN facilitates a nearly homogeneous titanium distribution in the subsurface zone, contrasting with the clustering seen when traditional cubic TiN is employed as the nitrogen source. Additionally, the thickness of the gradient surface layer can be effectively controlled by adjusting the h-BN levels, increasing with higher h-BN content in the raw materials. However, excessive h-BN addition facilitates abnormal WC phase growth in cemented carbides, and negatively affects transverse rupture strength despite the toughening effects of the cubic phase-free layer. Increased h-BN content also promotes the formation of TiB phases, which enhances the hardness of the cemented carbide.
研究领域:
材料科学
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粉末冶金
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DOI
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2025
·
IF 3.4
Xiaoyan Gao,Nisar Ali,Meng Zhao,Guang Hu,Adnan Khan,Dandan Min,Lijing Zhang,Lingli Ni,Mohammed Albahri
Nacre-like polymer nanocomposites have become fascinating material nowadays because of their exceptional mechanical property. In this study, nacre-like waterborne polyurethane/hexagonal boron nitride (WPU/h-BN) nanocomposite with high-thermal, mechanical and water resistance has been successfully prepared via mechanical blending method. Owing to strong interfacial interactions and a nacre-like structure, the WPU/h-BN nanocomposite with a loading amount of 30 wt% exhibits excellent tensile strength of 27.3 MPa, compared with 4.16 MPa for pure WPU. Additionally, it has an exceptional maximum decomposition temperature of 443 °C and an outstanding water absorption ratio of 8.1 %. This approach of adopting h-BN and WPU to construct nacre-like structure may provide a new path for preparing high performance WPU strategies.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Wu Yi-Ming,Hou Guo-Yuan,Fan Xin,Zhu Qian-Ye,Cui Ming-Jun,Ren Si-Ming
Polymer materials commonly employed in low Earth orbit (LEO) environments are highly susceptible to atomic oxygen (AO) attack, leading to severe degradation and deterioration of their properties. To address this challenge, 3-glycidyloxypropyltrimethoxysilane-modified hexagonal boron nitride (h-BN@KH560) nanohybrids were synthesized and incorporated into epoxy (EP) composites to enhance their AO erosion resistance. The resulting hexagonal boron nitride-based epoxy nanocomposites (FBN/EP) were systematically evaluated for their tribological performance and AO erosion resistance using a series of characterization techniques. The results demonstrated that the incorporation of h-BN@KH560 nanohybrids significantly improved the wear resistance and AO erosion resistance of the EP matrix. Specifically, the FBN 1.0 /EP nanocomposite exhibited an 86.1% reduction in wear rate compared to pure EP, while FBN 5.0 /EP nanocomposite achieved optimal AO erosion resistance, with a minimal erosion rate of 3.58 × 10 –24 cm 3 atoms −1 at an AO dose of 1.2 × 10 21 atoms cm −2 . These findings indicate that the incorporating content-induced distribution of h-BN@KH560 within the EP matrix strongly influences the wear resistance of FBN/EP nanocomposites, but there is a relatively minor effect on their AO erosion resistance. The enhanced AO erosion resistance is attributed to the synergistic barrier protection provided by h-BN@KH560 and the formed B 2 O 3 and SiO 2 layers under AO irradiation. This study offers a promising strategy for extending the service life of epoxy nanocomposites in harsh LEO environments. Graphical abstract
研究领域:
材料科学
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纳米技术
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高分子科学
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航空航天工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Nanqi Shi,Zhike Li,Xin Li,Hongxin Luo,Shuzhen Dong,Haiyan Li
Hexagonal boron nitride (h-BN), as a two-dimensional lamellar material, has been paid more and more attention in the field of corrosion protection because of its excellent thermal stability, chemical stability and insulation. In order to solve the problem that h-BN is difficult to disperse in resin, inspired by the adhesion ability of mussel secretions, the surface of h-BN was modified with polydopamine (PDA) to improve the dispersion of the fillers in epoxy resin, and the prepared corrosion inhibition CeO 2 nanoparticles were loaded on the surface. A functional filler CeO 2 &PDA/h-BN with corrosion inhibition effect was prepared. The surface morphology , chemical structure and thermal stability of functional fillers were analyzed by SEM, FTIR, XRD and thermogravimetric analysis . The test results show that after 40 days of testing, the low-frequency impedance modulus of the epoxy composite coating is 15 times that of the pure epoxy resin, and the wear resistance properties also significantly improved. The anti-corrosion mechanism of the composite coating is analyzed, and the synergistic effect of h-BN's barrier ability and CeO 2 's corrosion inhibition ability is revealed. This paper provides an idea for the preparation of multifunctional h-BN composite anticorrosive filler.
研究领域:
材料科学
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腐蚀防护
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表面工程
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DOI
高影响因子
JOURNAL OF ELASTOMERS AND PLASTICS
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2023
·
IF 1.7
Xiaoyong Yang,Xiaofang He,Fuqin Xu,Zhaoyang Hou,Zhihui Ma,Jing Cai,Ruimin Jiao
With the rapid development of electronic devices and rubber tires, the industry has put forward new requirements for the heat dissipation of rubber components. With excellent thermal conductivity, oxidation resistance, and thermal stability, hexagonal boron nitride (h-BN) is often added to plastics or rubber as a thermally conductive filler, but is less effective when used directly. In this study, h-BN-K was prepared by direct modification of the mixed solution of KH-550, and KH-570, while h-BN-PK was prepared by co-modification of dopamine, KH-550, and KH-570. Two modified h-BN were added to natural rubber (NR) to improve the vulcanization properties, mechanical properties, and thermal conductivity. It was found that the tensile strength and thermal conductivity of 20 wt% h-BN-PK/NR composites were 30.6 MPa and 0.335 W/mK, which were 39.1% and 110.7% higher compared to pure NR (22.0 MPa and 0.159 W/mK), respectively. In addition, the addition of h-BN improved the thermal stability performance of NR to some extent. In conclusion, the h-BN-PK/NR composites provide a certain reference for the use of thermally conductive NR and suggest new ideas for heat dissipation of electronic devices.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Fan Zhang,Mao chen,Hailong Wang,Gang Shao,Yongshun Qi,Chengliang Ma,Bingbing Fan,Xiaoxuan Pian,Rui Zhang,Hongxia Li,Yongqiang Chen
The h-BN/ZrO 2 composites with different 3Y–ZrO 2 content were prepared by spark plasma sintering at 1800 °C. The sintering behavior , bulk density, apparent porosity , thermal conductivity , thermal expansion coefficient , bending strength , thermal shock resistance , microstructure and phase were analyzed. The optimum specimens were used to test the resistance to corrosion of molten steel for 10, 20, 40, 80 min respectively. The results indicated that ZrO 2 could facilitate the sintering process of h-BN matrix under the action of spark plasma. Especially, for the composites with 30 wt% 3Y–ZrO 2 , the porosity could decrease to 1.1% and the flexural strength could exceed 150 MPa. The microstructure showed the h-BN grains and 3Y–ZrO 2 grains are closely combined. The XRD patterns indicated that the t-ZrO 2 diffraction peak gradually enhanced with the increase of density. With the increase of erosion time, the erosion rate increased significantly. After the surface of the specimen is eroded, the erosion resistance of the matrix would decrease significantly. This h-BN/ZrO 2 could be as side-dam used in the thin strip continuous casting process .
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 73
·42109-42115
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IF 2.936
Myonghak Ri,Kwanghak Choe,Kumchol Kim,Yan Gao,Zhiyong Tang
BCN (boron carbon nitride) nanosheets are promising photocatalyst materials for solar fuel production by visible light-driven water splitting and CO2 reduction due to their tunable band gap and unique properties. C-doping into h-BN by thermal annealing makes possible the preparation of BCN nanosheets with photocatalytic activity under visible light irradiation, but it generally requires a very high temperature (>1250 °C) from the thermodynamic viewpoint. Here, we report a new method to prepare BCN nanosheets with visible light-photocatalytic activity at lower annealing temperature (1000 °C) than equilibrium by adding alkaline earth metal compounds. BCN nanosheets formed in borate melt show a clear layered structure, tunable bandgap and photocatalytic activity for water splitting and CO2 reduction under visible light illumination. This provides a direction for doping other elements into h-BN at low annealing temperature by alkaline earth metal borates.
研究领域:
材料科学
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化学
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光催化
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太阳能转换
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）