摘要
以水性有机硅树脂为基料,采用SiC为填料制备了水性散热降温涂料。实验考察了SiC填料的添加量、粒径以及涂层厚度等因素对涂层散热性能的影响;同时对涂层的耐热性能和电绝缘性能作了研究。结果表明,当SiC填料的粒径为60nm,用量为基体质量的30%,涂层厚度为42μm时,散热涂层的降温温差最大,为11.5℃;另外,涂层的SEM照片显示,在SiC填料用量为基体质量的30%时,相对于微米SiC填料,纳米SiC填料分散均匀且填料彼此间粘结更为紧密;利用TGA测试显示,在SiC用量为基体质量的30%时,涂层在200℃下的热失重在0.4%以内,都能在200℃高温下长期使用;介电常数测试表明,在SiC用量为基体质量的30%时,涂层的介电常数都不超过6.0,表现出良好的介电性能。
The water-based cooling coating was obtained with the silicone resin as matrix, and the silicon carbideas fillers. The SiC filler contents, the SiC filler particle size and the coating thickness were studied. At the same time, the thermal stability and electrical insulation properties were researched. The results indicate that when the SiC filler particle was 60nm, the addition of SiC was 30% of the mass fraction of matrix and the coating thickness was 42μm, the cooling temperature difference was largest and 11.5℃. In addition, compared to the micron SiC filler, the nano-SiC particles disperse uniformly and bond more closely in the paint film characterized of by SEM images. TGA measures show that at the 30% of the mass fraction of matrix, the weight loss was less than 0.4% at 200℃, which indicate that it can be used for a long term at about 200℃. The dielectric per- formance tests show that at the 30% of the mass fraction of matrix, the dielectric constant of the coatings are all not more than 6.0, with good dielectric properties.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第5期736-739,743,共5页
Journal of Functional Materials
基金
上海市科委纳米专项资助项目(11nm0501400)
上海市教委第五期重点学科资助项目(J50102)
上海市环境条件计划资助项目(10dz2252300)
上海市高校青年教师培养资助计划资助项目(B.37-0407-11-003)
关键词
水性涂料
纳米涂料
降温涂料
耐高温
water-based coating
nano-coating
cooling coatings
high temperature resistant
