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材料导报  2024, Vol. 38 Issue (11): 22070092-6    https://doi.org/10.11896/cldb.22070092
  高分子与聚合物基复合材料 |
利用聚多巴胺硅烷双重改性氮化硼提高环氧树脂复合材料热物性
于天夫1,2, 李祥1,2, 杨薛明1,2,*, 胡宗杰1,2, 季畅1,2
1 华北电力大学能源动力与机械工程学院,河北 保定 071003
2 河北省低碳高效发电技术重点实验室,河北 保定 071003
Improvement of Thermophysical Properties of Epoxy Resin Composites by Double Modification of Boron Nitride with Polydopamine Silane
YU Tianfu1,2, LI Xiang1,2, YANG Xueming1,2,*, HU Zongjie1,2, JI Chang1,2
1 School of Energy, Power and Mechanical Engineering, University of North China Electric Power, Baoding 071003, Hebei, China
2 Hebei Province Key Laboratory of Low-carbon High-efficiency Power Generation Technology, Baoding 071003, Hebei, China
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摘要 添加高导热无机填料可以有效改善环氧树脂(EP)的低导热性,但高填料含量往往会降低复合材料的力学性能。本研究针对少导热填料含量(小于15%(质量分数,下同))下改性氮化硼/环氧树脂复合材料的综合物性进行研究;利用多巴胺、硅烷偶联剂修饰氮化硼,将得到的改性氮化硼添加到环氧树脂中,分析了不同含量的改性填料复合材料的导热性、热稳定性和力学性能。结果表明,表面改性提高了氮化硼在树脂基质中的分散性和与树脂的相容性;与氮化硼/环氧树脂复合材料相比,改性氮化硼/环氧树脂复合材料导热系数、玻璃化转变温度、热稳定性得到了有效提高。当改性氮化硼含量为15%时,改性氮化硼/环氧树脂复合材料的导热系数为0.63 W/(m·K),为纯环氧树脂导热系数的324%,玻璃化转变温度和热分解温度(T10%)分别提高到132.34 ℃和379.68 ℃,相较于纯环氧树脂分别提高了10.44 ℃和10.2 ℃。当氮化硼填充物的质量分数为3%时,复合材料的拉伸和弯曲强度分别增加为纯环氧树脂的108%和106%。
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于天夫
李祥
杨薛明
胡宗杰
季畅
关键词:  环氧树脂  氮化硼  力学性能  导热系数  改性  耐热性    
Abstract: Filling epoxy resin with inorganic filler to form composite material can effectively improve the low thermal conductivity of epoxy resin, but high filler content tends to reduce the mechanical properties of composites. Thiswork examined the full set of physical characteristics of modified boron nitride/epoxy resin composites with a negligible amount of thermally conductive fillers (less than 15wt%). The thermal conductivity, thermal stability, and mechanical characteristics of modified filler composites with various contents were examined after boron nitride was modified using dopamine and silane coupling agents and added to epoxy resin. The results show that the surface modification enhances the resin's compatibility and dispersibility. The thermal conductivity, glass transition temperature, and thermal stability of the boron nitride/epoxy composites have all been significantly enhanced when compared to boron nitride/epoxy composites and modified boron nitride/epoxy composites. The glass transition temperature and thermal decomposition temperature (T10%) are increased to 132.34 ℃ and 379.68 ℃, respectively, which are 10.44 ℃ and 10.2 ℃ higher than pure epoxy when the content of modified boron nitride is 15wt%, increasing the thermal conductivity to 0.63 W/(m·K), which is increased to 324% of that of pure epoxy resin. When the boron nitride filler mass fraction was 3wt%, the composites' tensile and flexural strengths climbed to 108% and 106% of those of pure epoxy resin, respectively.
Key words:  epoxy resin    boron nitride    mechanical property    thermal conductivity    modification    heat resistance
发布日期:  2024-06-25
ZTFLH:  TB332  
基金资助: 国家自然科学基金 (52076080)
通讯作者:  *杨薛明,博士,华北电力大学动力工程系教授、博士研究生导师。1993年获得华北电力大学工学学士学位,1996年获得华北电力大学工学硕士学位,2007年获得华北电力大学工学博士学位,2009年留学美国匹兹堡大学从事博士后研究,2014年在清华大学航天航空学院从事博士后研究。现从事微纳尺度传热传质、复合材料热物性相关研究。共发表论文60余篇,其中SCI收录40余篇。xuemingyang@ncepu.edu.cn   
作者简介:  于天夫,2021 年 6 月毕业于东北电力大学,获得工学学士学位,现为华北电力大学动力工程系动力工程及工程热物理专业硕士研究生,在杨薛明教授的指导下进行研究,目前主要从事氮化硼聚合物多性能研究。
引用本文:    
于天夫, 李祥, 杨薛明, 胡宗杰, 季畅. 利用聚多巴胺硅烷双重改性氮化硼提高环氧树脂复合材料热物性[J]. 材料导报, 2024, 38(11): 22070092-6.
YU Tianfu, LI Xiang, YANG Xueming, HU Zongjie, JI Chang. Improvement of Thermophysical Properties of Epoxy Resin Composites by Double Modification of Boron Nitride with Polydopamine Silane. Materials Reports, 2024, 38(11): 22070092-6.
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http://www.mater-rep.com/CN/10.11896/cldb.22070092  或          http://www.mater-rep.com/CN/Y2024/V38/I11/22070092
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