氮化硼纤维填充聚乙烯醇导热复合材料的制备  

Preparation of thermally conductive PVA composites filled with BN fiber

作　　者：施瑶 王月 马西飞 黄晓[3] 孙大志 赵静[2] SHI Yao;WANG Yue;MA Xifei;HUANG Xiao;SUN Dazhi;ZHAO Jing(College of Chemistry and Materials Science,Shanghai Normal University,Shanghai 200234,China;Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Institute for the Conservation of Cultural Heritage,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海师范大学化学与材料科学学院,上海200234 [2]中国科学院上海硅酸盐研究所,上海200050 [3]上海大学文化遗产保护基础科学研究院,上海200444

出　　处：《上海师范大学学报（自然科学版）》2020年第5期561-568,共8页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家重点研发计划(2019YFC1520104,2019YFC1520504);国家自然科学基金(51732008)。

摘　　要：以聚乙烯醇(PVA)为基体,选用六方氮化硼纤维(BN fiber)作为导热填料,通过溶液共混的方法制备导热复合材料。结合X射线衍射仪(XRD)、扫描电子显微镜(SEM)以及导热测试结果,探究填料的微观形貌以及与基体的界面相容性对于提升复合材料导热性能的影响。结果表明:BN fiber对于提升复合材料的面内导热率有很好的效果,而且采用过氧化氢(H2O2)溶液进行表面改性,可以有效改善界面相容性;当经过1400℃热处理再经过表面改性的BN fiber(BN fiber-1400-H2O2)的填充量为5%(质量分数)时,复合材料的面内导热率达到了1.32 W·m^-1·K^-1,为纯PVA体系的629%,相比于表面改性前提升了60%。Thermally conductive composites were prepared by polyvinyl alcohol(PVA)filled with BN fiber via solution blending.The effects of BN fiber’s micromorphology and interface compatibility with substrate on the thermal conductivity of composites were investigated by XRD,SEM,and thermal conductivity measurement.The results showed that BN fibers have a good performance on improving the in-plane thermal conductivity of the composites,and the surface modification using H2O2 solution can effectively improve the interface compatibility.With a 5%(mass fraction)of BN fiber-1400-H2O2,the in-plane thermal conductivity of the composites was increased from 0.21 W·m^-1·K^-1 to 1.32 W·m^-1·K^-1 and increased by 60%compared with BN fiber-1400.

关 键 词：氮化硼纤维(BN fiber) 表面改性 导热率 

分 类 号：O65[理学—分析化学]