高性能发泡导电硅橡胶的制备  

Preparation of high-performance foamed conductive silicone rubber

作　　者：许宝中 张凯 熊岩松 陈首杉 杨明山[1] XU Bao-zhong;ZHANG Kai;XIONG Yan-song;CHEN Shou-shan;YANG Ming-shan(College of New Materials and Chemical Engineering/Beijing Key Lab of Special Elastomeric Composite Materials,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院新材料与化工学院/特种弹性体复合材料北京市重点实验室,北京102617

出　　处：《合成橡胶工业》2023年第3期187-192,共6页China Synthetic Rubber Industry

摘　　要：以羟基硅油和乙烯基硅油为基胶,以含氢硅油为交联剂,使用偶联剂、导电粉末填料和铂金催化剂,采用脱氢发泡法制备了发泡导电硅橡胶,并通过橡胶加工分析仪、扫描电子显微镜、宽频介电阻抗谱仪、电子万能试验机分别表征了发泡导电硅橡胶的发泡交联同步性、电导率、力学性能,此外,还探究了发泡交联温度、交联剂用量和导电粉末填料用量对发泡导电硅橡胶性能的影响。结果表明,当发泡交联温度为115℃时,发泡交联同步性最佳,制得的发泡硅橡胶泡孔结构均匀、力学性能最佳;当交联剂用量为0.45份(质量,下同)时,发泡硅橡胶的表观密度为0.69 g/cm^(3),抗压强度为1.17 kPa,说明此时的交联剂用量为最佳;当导电粉末填料用量为10份时,发泡导电硅橡胶的电导率可达到1.5 S/cm,导电性能非常好。Foamed conductive silicone rubber was prepared by dehydrogenation foaming method using coupling agent,conductive powder filler and Pt catalyst with vinyl silicone oil and hydroxyl silicone oil as matrix and silicone oil containing hydrogen as cross-linking agent,and the synchronization of foa-ming and cross-linking,conductivity and mechanical properties of foamed conductive silicone rubbers were characterized by rubber processing analyzer,scanning electron microscope,broadband dielectric impedance spectrometer,and electronic universal testing machine,respectively.Furthermore,the effect of foaming and cross-linking temperature,addition amount of cross-linking agent and addition amount of conductive powder filler on the properties of foaming conductive silicone rubbers were investigated.The results showed that when the foaming and cross-lin-king temperature was 115℃,the synchronization of foaming and cross-linking was the best and the foaming silicone rubber prepared had a uniform cell structure and the optimum mechanical properties.When the addition amount of cross-linking agent was 0.45 phr(mass,similarly hereinafter),apparent density of foamed conductive silicone rubber was 0.69 g/cm^(3) and compressive strength was 1.17 kPa,which indicated the addition amount of cross-linking agent was the optimal at this time.When the addition amount of conductive powder filler was 10 phr,conductivity of foamed conductive silicone rubber could be up to 1.5 S/cm,which demonstrated the electrical conductivity of foamed conductive silicone rubber was very excellent.

关 键 词：硅橡胶 发泡改性 导电粉末填料 压缩永久变形率 抗压强度 电导率 

分 类 号：TQ333.93[化学工程—橡胶工业]