地聚物基碳系电热涂料的制备与性能研究  

Study on Preparation of Geopolymer-carbon Based Electrothermal Coatings and Its Performances

作　　者：郭佩 崔学民[1] 林朝旭 杨思杰 吕学森[1] GUO Pei;CUI Xuemin;LIN Chaoxu;YANG Sijie;LU Xuesen(College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,Guangxi,China)

机构地区：[1]广西大学化学化工学院

出　　处：《陶瓷学报》2019年第4期469-476,共8页Journal of Ceramics

基　　金：国家自然科学基金(51772055);国家自然科学基金国际合作项目(51561135012)

摘　　要：电热涂料具有优异的电热性能,是一种广泛应用于生产和生活中的新型功能涂料。传统有机电热涂料VOC(Volatile Organic Compounds)含量高、制备成本高,而传统无机电热涂料制备过程复杂、涂层发热不稳定。本文以石墨、炭黑粉、多壁碳纳米管作为导电填料分别制备得到三种地聚物基环保型电热涂料,并对三种填料制备所得涂层的导电性、电热性及微观结构进行了研究。结果表明:多壁碳纳米管为填料制备所得涂层的电性能及热性能优于石墨和炭黑粉,当掺量为4wt.%时就达到涂层的体积电阻率,其电阻率可降低至8.956Ω·cm,36V交变电流通电480 s其发热温度可升高到84.9℃,在通电100次后仍保持着优良的电热性能。从涂层SEM可以得知,碳系填料均匀地分散在地聚物三维网络结构中,这不仅有利于涂层实现良好的导电性,也有利于其保持良好的机械性能及耐久性能。Conductive electrothermal coating is a new type of functional coating with excellent electrothermal properties,which has been widely used in production and common life.To solve the high VOC emission and preparation cost of traditional organic electrothermal coatings,as well as the complex preparation process of some inorganic electrothermal coatings and also unstable heating performance,a geopolymer-based environment-friendly electrothermal coating was prepared by using graphite,carbon powder and multi-walled carbon nanotubes as conductive fillers.The conductivity,electrothermal properties and microstructure of the coatings prepared with the three fillers were studied.The results show that the electrical and thermal properties of the coat ings manufactured with multi-walled carbon nanotubes are better than those with graphite and carbon powder.The percolation value was reached and the resistivity of the coatings was reduced to 8.956Ω·cm when 4% carbon nano-tubes were added into the coatings,the temperature of the sample reached 84.9℃ after being worked in 36 V alternating current for 480 second.The coat ings own excellent electrothermal properties after 100 electrification cycles.The SEM of the coating shows that the carbon fillers are uniformly distributed in the three-dimensional network structure of geopolymer,which is beneficial for coatings to achieve excellent conductivity but also conducive to maintaining good mechanical properties and durability.

关 键 词：地聚物 电热涂料 碳系 电热性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]