HTV硅橡胶的疏水抗紫外层制备及机理研究  

Preparation and mechanism research of hydrophobic and anti-UV layer for HTV silicone rubber

作　　者：雷鸣东 李强 干强 李子由 康兵 何俊佳[2] LEI Mingdong;LI Qiang;GAN Qiang;LI Ziyou;KANG Bing;HE Junjia(Dali Bureau,Ultra High Voltage Transmission Company of China Southern Power Grid Co.Ltd.,Dali 671000,China;School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司大理局,云南大理671000 [2]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《绝缘材料》2024年第4期36-43,共8页Insulating Materials

基　　金：中国南方电网重点科技项目(110002022030301SJ00011)。

摘　　要：高温硫化(HTV)硅橡胶的抗紫外老化性能较差,在紫外辐照后其憎水性逐渐丧失,拉伸强度降低,硬度增加明显。为了提升HTV硅橡胶的疏水性和抗紫外性能,本文通过分步嵌入固化的方式在HTV硅橡胶表面引入不同结构的长效性室温硫化(PRTV)硅橡胶和四针状氧化锌/纳米氧化锌(tZnO/nZnO)粒子,制备了不同形貌的疏水型抗紫外复合涂层,并通过老化试验、水接触角、表面硬度、力学性能等测试研究了该复合涂层的结构组成对HTV硅橡胶微观形貌和抗老化性能的影响。结果表明:在HTV硅橡胶表面引入PRTV硅橡胶后,其表面孔洞得以覆盖,憎水性增加,含水率和吸水率下降;引入的ZnO粒子大幅提升了硅橡胶材料的憎水性、抗紫外性和热稳定性;通过分步嵌入固化引入的PRTV硅橡胶-tZnO/nZnO复合涂层,可有效构建微纳级乳突结构和紫外屏蔽层,其对基体的憎水性和抗紫外老化性提升效果相比单一嵌入tZnO或nZnO粒子更加明显。High-temperature-vulcanized(HTV)silicone rubber has poor resistance to ultraviolet(UV)ageing,and its hydrophobicity would gradually lost,tensile strength decrease,and hardness significantly increase after ultraviolet irradiation.In order to improve the hydrophobicity and UV resistance of HTV silicone rubber,the permanent-room-temperature-vulcanized(PRTV)silicone rubber and four needle-like zinc oxide/nano-zinc oxide(tZnO/nZnO)particles with different structures were introduced onto the surface of HTV silicone rubber by embedding-curing method to prepare the hydrophobic and anti-UV composite coatings with different morphologic morphology.The effects of the composition of composite coating on the microstructure and anti-ageing properties of HTV silicone rubber were studied by the ageing experiment and water contact angle,surface hardness,and mechanical properties tests.The results show that the surface holes of HTV silicone rubber are covered,its hydrophobicity increases,and water content and water absorption decrease after the introduction of PRTV silicone rubber on the surface of HTV silicone rubber.The further introduction of ZnO particles greatly improves the hydrophobicity,UV resistance,and thermal stability of HTV silicone rubber materials.The PRTV silicone rubber-tZnO/nZnO composite coating introduced by stepwise embedding-curing method can effectively construct a micro-nano mastoid structure and UV shielding layer on the HTV silicone rubber surface,and its enhancing effect on the hydrophobicity and UV ageing resistance are more obvious than that of single embedding of tZnO or nZnO particles.

关 键 词：HTV硅橡胶 复合涂层 tZnO/nZnO 疏水性 抗紫外性能 

分 类 号：TM215[一般工业技术—材料科学与工程] TQ336[电气工程—电工理论与新技术]