CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qianglong He,Lanxin Hu,Yunwei Shi,Yi Cui,Aiyang Wang,Weimin Wang
TiN–TiB 2 –hBN ceramic composites were prepared using nitride boronisation with TiN–B as the raw material. The bulk samples exhibited layered structures through secondary reactions at higher temperatures. In the outer layer of the bulk sample, hBN was consumed, and the content of the hard phase (TiB 2 ) increased because of the secondary reaction, which increased the hardness of the outer layer to 20.54 GPa, i.e., 68.64% higher than that of the inner layer (12.18 GPa). In addition, the mechanical properties of TiN–TiB 2 –hBN ceramic composites with a layered structure were not adversely affected by the higher sintering temperature: the bulk sample maintained a high bending strength of 477 MPa, and the fracture toughness was improved to 4.02 MPa m 1/2 by twins and stacking dislocations.
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JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2015
·
IF 3.615
Dongsheng Zhou,Bo Li,Zhaoxia Ma,Xiaodong Huang,Xiaobin Zhang,Hangsheng Yang
A synergy between FeO X and CuO X was confirmed in FeCuO X /TiO 2 -hBN composites for selective catalytic reduction of NO with NH 3 . Accordingly, the reducibility of composites was modified to promote the NO to NO 2 oxidation but suppress the NH 3 to NO over oxidation, which is of benefit to the NO reduction. Also the optimal operation temperature could be controlled by tuning the Fe:Cu atomic ratio, and Fe 10 Ti 85 BN 5 , Fe 7.5 Cu 2.5 Ti 85 BN 5 and Fe 2.5 Cu 7.5 Ti 85 BN 5 achieved the best NO removal above 90% at 375 °C, 300 °C and 250 °C, respectively. From the NO 2 and NH 3 adsorption behaviors over FeCuO X /TiO 2 -hBN, the reaction followed Langmuir–Hinshelwood mechanism below 275 °C, but followed Eley–Rideal mechanism above 350 °C. The influence of SO 2 on NO removal was found to be temperature dependent, at temperature below 325 °C, slight deactivation was observed, while a promotion was achieved above 350 °C.
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JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 10
·407
·
IF 3.5
Zhao Xiaoke,Yang Doudou,Guo Xiuyan,Sun Ling,Liu Xiaohui,Ren Yuanlin,Li Yuesheng
Driven by the increasing demand for wooden furniture, polyurethane (PU) with flame-retardant properties is widely used in woodworking. In this work, 6-(3-(2,3-dihydroxypropoxy)propyl)dibenzo[c, e] [1, 2] oxaphosphinine 6-oxide (DG) was synthesized via addition reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 3-allyloxy-1,2-propanediol. Subsequently, DG and hBN were incorporated into the PU matrix, dual crosslinking agents triethanolamine and triethoxy(3-glycidyloxypropyl)silane were introduced and the PU was then applied to wood via hot-pressing and coating methods. Compared with unmodified flame retardant wood, the modified wood achieves UL-94 V-0 rating with reduced heat release rate by 26.25% and total heat release by 14.04%. Moreover, thermogravimetric analysis confirms enhanced thermal stability, with T 5% rising from 258 ℃ to 273 ℃ and 800 ℃ residue 13.36% to 23.01%. Simultaneously, the PU exhibits excellent water resistance, with water absorption rates remaining below 3% after 24 h of immersion. This study develops and demonstrates a novel strategy for fabricating wood-based flame-retardant composites, which yields high-performance PU coatings that combine excellent flame retardancy with water resistance for wood product applications.
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COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Qiang Jing,Zixi Zhang,Tianqi Liang,Shukun Yu,Shiwei Liu,Hang Zhao,Zheling Li,Pei Huang,Yuan-Qing Li,Shao-Yun Fu
Mimicking the structure of nacres with high filler contents and layered structures has been demonstrated to be a promising strategy to improve the mechanical properties of nanocomposites. However, in the fabrication of such nanocomposites, the incorporation of fillers at high contents often suffers from their agglomeration that remarkably limits their mechanical performances, which is difficult to avoid and evaluate. In this work, nanocomposites, mimicking the structure of nacres, have been prepared using high content graphene oxide (GO) and hexagonal boron nitride (hBN) hybrid fillers, where the incorporation of hBN suppresses the agglomeration of GO. This leads to superior mechanical properties of the hybrid nanocomposites than those reinforced with a single type of fillers, especially at high filler contents. Based on the three-phase rule of mixtures, a concept of ‘dispersion factor’ is proposed. A higher dispersion factor of GO is found in the hybrid nanocomposites than in the nanocomposites reinforced with just GO, demonstrating a higher level of GO dispersion and the suppression of GO agglomeration by adding hBN. Such a hybrid strategy in nanocomposites shows paramount values in the suppression of nanofiller agglomeration for preparing nanocomposites.
研究领域:
材料科学
·
纳米技术
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Kunjie Zhou,Jingyi Zhu,Ruisi Meng,Wei Zeng,Zhuo Xue,Chen Shen,Yueran Zhao,Yuchen Zhou,Mengyao Li,Yanan Wang,Kenji Watanabe,Takashi Taniguchi,Minliang Lai,Jia Lin,Sheng Wang
All-inorganic cesium lead halide perovskite quantum dots (QDs) have emerged as promising materials for next-generation optoelectronic devices due to their exceptional photoluminescence (PL) properties, including high quantum yields and narrow emission line widths. However, unlocking their full potential requires innovative strategies to further enhance and precisely tune their fluorescence efficiency. In this work, we present a novel 0D-2D-3D mixed-dimensional van der Waals (vdW) heterostructure comprising CsPbBr3 QDs, multilayer hexagonal boron nitride (hBN), and a gold (Au) nanoparticle film, achieving a remarkable 7-fold PL enhancement. We attribute this enhancement to the synergy of plasmon-induced enhancement of the incident electromagnetic field and an increased spontaneous emission rate via the Purcell effect, optimized by tuning the hBN spacer thickness to 26 nm. This heterostructure design provides new insights into metal-enhanced photoluminescence for perovskite quantum dots, and it offers a scalable platform to enhance efficiency in future optoelectronic applications.
研究领域:
光电子学
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纳米光子学
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材料科学
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等离激元学
·
量子点
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PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Junpeng Shu,Fan Tang,Hui Shi,Ming Tian,Ruowang Chen,Zhenning Hu,Md Al Shahriar Akash,Nadia Afzal,Chaojun Tang,Neng Wan
Thermal interface material (TIM) composites composed of hexagonal boron nitride (hBN) fillers with high thermal conductivity and mechanical slow resilience properties have been shown to be effective solutions for increasing the demand for electronic device heat dissipation. However, the use of polymers or resins as the TIM matrix is costly for recycling or causes severe environmental pollution due to the long period of degradation. Additionally, the hBN filler normally has a much higher cost than the matrix does. Thus, the search for environmentally friendly and cost-effective recyclable hBN-based TIM composites is promising. Here, we develop a malleable and easily processable hBN/starch composite dough through a cost-effective and scalable fabrication process. The prepared composite exhibited a high thermal conductivity of 4.30 W m −1 K −1 (at 40 wt% hBN loading), good thermal stability and good mechanical compliance properties with stable slow resilience. The resulting TIM ensures seamless contact between the heat source and heat sink, which contributes to effectively enhanced heat dissipation. Excellent antibacterial properties are also demonstrated by the addition of a small amount of glycerol or tannic acid to the TIM. The hBN fillers can be recycled at a high recovery rate of 96.1 % with a low process cost. Our work provides a novel and practical strategy for developing high-performance and low-cost TIMs for thermal management applications.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 5
·e70202
·
IF 3.4
Chaoxin Wang,Qi Wang,Yongliang Wang,Peigang He,Zhidong Han
The developing trends of electrical and electronic devices in high-power operation, densified installation, and structural miniaturization challenge the application of the composites with efficient thermal conductivity. In view of the manufacture technology of polyolefin materials, the melt-processing strategy was designed to prepare the thermally conductive composites based on polypropylene/polyolefin elastomer (PP/POE) blend with hexagonal boron nitride (hBN) and alumina oxide (Al 2 O 3 ). By filling hBN and Al 2 O 3 separately into the co-continuous PP/POE blend, the selectively distributed structure with hBN in the PP phase and Al 2 O 3 in the POE phase was revealed, and the thermal conductivity of the composites was improved with selective filler distribution. The processing scheme exerted distinct influences on the distribution structure and the thermal conductivity of the composites with the same filler content. A superior thermal conductivity of 0.80 W/(m K) was achieved with the individually distributed structure of BN and Al 2 O 3 together with the bridged interaction between PP/BN and POE/Al 2 O 3 phases. The reduction in interfacial thermal resistance contributed to the enhanced thermal conductivity according to the simulation with finite element analysis (FEA). The proposed strategy provides an efficient way to mass manufacture thermally conductive polypropylene composites.
研究领域:
材料科学
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高分子材料工程
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IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2025
·
IF 3.1
Zuhao Wang,Xiao Peng,Ioannis Chronis,Yingrui Wu,Constantinos S. Psomopoulos,Chao Tang
As the global power industry evolves, transformer insulation systems face increasing challenges. The aging of cellulose insulation paper (cellulose-IP) at elevated temperatures significantly impacts its insulation properties and overall lifespan. To enhance the thermal aging resistance and industrial usability of cellulose-IP, this study employs nano-boron nitride (h-BN) along with three silane coupling agents—3-ammonopropyltriethoxysilane (KH550), 3-glycidyloxypropyltrimethoxysilane (KH560), and 3-methacryloyloxypropyltrimethoxysilane (KH570)—to modified cellulose-IP. Upon evaluating the properties and simulation results of the modified cellulose-IP, KH550-hBN demonstrated superior properties and was selected for an accelerated thermal aging test lasting 60 days. The results indicated that KH550-hBN effectively mitigates the degradation of cellulose-IP. In the late aging stage, the mechanical properties of the modified cellulose-IP deteriorated more slowly than those of pure cellulose-IP. Additionally, thermal conductivity improved by 26.9%, while breakdown field strength increased by 12.1%. The introduction of KH550-hBN promotes the formation of a complete thermal conductivity network within the cellulose matrix, increases the number of intermolecular hydrogen bonds and introduces nano-barrier regions.These improvements enhance the interactions between the cellulose systems and effectively inhibit the generation and migration of polar derivatives during the aging process, resulting in a significant improvement in the longevity and stability of transformer internal insulation systems.
研究领域:
材料科学
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电气工程
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Hailing Yang,Ji Zou,Zhimin Xiong,Jingjing Liu,Weimin Wang,Zhengyi Fu
Hexagonal BN-coated powders have been widely used in various engineering sectors, however, their productions are restricted by the complexity of gas-solid reactions. In this study, guided by thermodynamics, a novel approach to synthesize Layer-structured hexagonal BN ( h BN)-coated high entropy diboride powders in vacuum was developed, using metal salt Zr(NO 3 ) 4 ·5H 2 O, HfCl 4 , NbCl 5 , TaCl 5 , C 16 H 36 O 4 Ti, boric acid, and sucrose as raw materials. By adjusting the ratio of carbon to metal source (C/M), powders only consisting of two boride solid solutions and h BN were finally obtained, under an optimal processing condition of C/ M = 5.5 and synthesis temperature of 1400 °C. Parts of h BN were found to coat on high-entropy metal diborides ceramic (HEB) particles, corresponding formation mechanism for core-shell structured powders was investigated, together with the liquid precursor assisted boro/carbothermal reduction process. Starting from as-synthesized core-shell powders, (Ti 0.2 Zr 0.2 Hf 0.2 Nb 0.2 Ta 0.2 )B 2 –11 vol% h BN ceramics were densified at 1900 °C under 50 MPa without holding, with a high relative density of 97.3%.
研究领域:
材料科学
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化学工程
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Zhiping Huang,Wenjie Zhao
Epoxy resin (EP) composite coatings enhanced with hexagonal boron nitride (HBN) nano-sheets, TiO 2 particles and HBN-TiO 2 hybrid material were fabricated successfully on the surface of 304L stainless steel. The structural and morphological features of HBN, TiO 2 and HBN-TiO 2 hybrid obtained from mechanical peeling and sol-gel method were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), Raman spectroscopy, XRD patterns, FT-IR spectra and XPS spectra. Moreover, tribological characteristic of composite coatings was investigated by UMT-3 tribometer. Mechanical behavior, worn surface, steel ball surface and debris size distribution of composite coatings were detected to investigate the tribological mechanism. The results demonstrated that HBN/EP, TiO 2 /EP and HBN-TiO 2 /EP composite coatings showed remarked promotion of mechanical behavior compared with the neat EP, especially for the improvement of hardness. The HBN-TiO 2 /EP composite coating, whose wear rate decreased by 65.8 % in comparison with the neat EP, manifested prominent tribological performance ascribed to the load carrying capacity of TiO 2 and the reduction of self-lubricating effect on the size of debris.
研究领域:
材料科学
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表面工程
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高影响因子
TRIBOLOGY LETTERS
·
2022
·Vol. 70
·期 3
·1-14
·
IF 3.327
Wu Can,Xie Yijia,Zhao Huijun,Yang Haining,Li Xinglin,Ni Jing
The influences of Hexagonal boron nitride (hBN) and Calcium carbonate (CaCO 3 ) nanoparticles on tribological and bearing vibration properties of polyurea grease (PG) were investigated. The microstructure, friction coefficient, wear morphology, and bearing vibration test of five components of greases were conducted. The results showed that the addition of 1 wt% hBN, playing the role of isolation protection and nano-abrasive, could improve the wear and vibration reduction performance of PG. However, the addition of CaCO 3 nanoparticles at the same time, playing the role of deposition and recovery, could further improve the tribological and vibration reduction performance of PG, which was attributed to the synergistic effect of CaCO 3 and hBN particles. The findings revealed that PG with the addition of 1 wt% hBN + 5 wt% CaCO 3 nanoparticles had the greatest tribological and vibration suppression performance, which is due to the synergistic effect of hBN and CaCO 3 nanoparticles. Additionally, the wettability tests showed that the addition of hBN and CaCO 3 nanoparticles could significantly increase the flow of base oil on the PG soap fibers, resulting in the most effective bearing vibration suppression.
研究领域:
材料科学
·
机械工程
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Can Wu,Yuyang Hong,Jing Ni,Paul D. Teal,Lidan Yao,Xinglin Li
Grease plays an important role in reducing friction and wear of rolling bearings and improving their service life and reliability. However, increasing attention is being paid to the environmental pollution caused by discarded grease. In this paper, calcium sulfonate complex grease (CSCG) was prepared by using green raw materials, namely poly-alpha-olefin oil as the base oil and complex calcium sulfonate soap as thickener . In order to improve the lubrication and damping performance of the grease, hexagonal boron nitride (hBN) and nano-Al 2 O 3 , which have the potential to replace toxic additives, are mixed into the grease in different mass proportions. The thickener structure of each grease was characterized and analyzed. According to the bearing vibration and life of the two key performance indicators, four-ball tests and bearing vibration tests under limited lubricant supply (LLS) were performed. The results show that CSCG with 0.75 wt% hBN and 0.25 wt% Al 2 O 3 (BN75AL25) has the best tribological and vibration suppression performance. The mean friction coefficient decreased by 11.3%, the wear scar diameter decreased by 6.1%, and the worn surface morphology improved significantly compared with CSCG. The frequency domain analysis showed that high, medium and low frequency vibrations were suppressed by 19%, 11.7% and 16.4%, respectively. In conclusion, BN75AL25 has the potential to become a green high-performance grease under LLS, which is worth further research and exploration.
研究领域:
材料科学
·
机械工程
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高影响因子
危险品化学品经营许可证（带存储）