紫外光照对氮化硼/碳纳米管/聚乙烯醇缩丁醛复合材料导热性能的影响  

Effect of ultraviolet illumination on the thermal conductivity of boron nitride/carbon nanotube/polyvinyl butyral composites

作　　者：申福花 张媛娟 徐锦波 张立军 肖贵勇 林欢[1] SHEN Fuhua;ZHANG Yuanjuan;XU Jinbo;ZHANG Lijun;XIAO Guiyong;LIN Huan(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266000,China;Qingdao University of Technology Engineering Quality Inspection and Appraisal Center Co.,Ltd.,Qingdao 266033,China)

机构地区：[1]青岛理工大学环境与市政工程学院,山东青岛266000 [2]青岛理工大学工程质量检测鉴定中心有限公司,山东青岛266033

出　　处：《功能材料》2024年第10期10047-10052,共6页Journal of Functional Materials

基　　金：国家重点研发计划项目基金资助项目(2019YFE0119900);山东省自然科学基金资助项目(ZR2020ME183)。

摘　　要：以PVB为基底,碳纳米管和氮化硼为填料,采用溶液共混法制备成复合材料,并针对波长范围、照射时长和辐照强度3种影响因素,开展了人工紫外照射实验,通过瞬态电热技术测量了不同波长、不同照射时长和不同辐照强度下复合材料的热扩散系数和导热系数。结果表明,氮化硼/碳纳米管/聚乙烯醇缩丁醛复合材料对波长为340 nm的光照射线更为敏感,且随着照射时间的增长或者辐照强度的增大,材料内部结构会发生断裂和降解,使得其热扩散系数呈不断下降的趋势。The composites were prepared by solution blending method using PVB as substrate and carbon nanotubes and boron nitride as fillers.Artificial ultraviolet irradiation experiments were carried out based on three influencing factors:wavelength range,irradiation time and irradiation intensity.The thermal diffusivity of the composites at different wavelengths,irradiation times and irradiation intensities was measured by transient electrocalorimetric technique.The results show that the boron nitride/carbon nanotube/poly(vinyl butyral)composites are more sensitive to the light rays at a wavelength of 340 nm,and with the increase of irradiation time or intensity,the internal structure of the material will be fractured and degraded,resulting in a continuous decrease in its thermal diffusivity.

关 键 词：复合材料 紫外辐射 导热性能 瞬态电热技术 聚乙烯醇缩丁醛 

分 类 号：O551.3[理学—热学与物质分子运动论]