硅表面活性剂增强的双网络耐高温多孔有机硅弹性体  

Silicone Surfactant-enhanced Dual Networks and High Temperature Resistance Porous Silicone Elastomers

作　　者：乔政华 范琪 郝京诚[1] QIAO Zhenghua;FAN Qi;HAO Jingcheng(Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,Shandong University,Jinan 250100,China)

机构地区：[1]山东大学胶体与界面化学教育部重点实验室,济南250100

出　　处：《高等学校化学学报》2022年第10期274-282,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:22032003,22072073)资助.

摘　　要：采用聚醚改性三硅氧烷表面活性剂、丙烯酸酯改性硅油和水3种组分制备了稳定的油包水(W/O)乳液,经酸碱催化水解、紫外引发聚合和干燥除水过程得到了双网络多孔有机硅弹性体.扫描电子显微镜(SEM)分析结果表明,所制备的有机硅弹性体具有丰富的孔径结构分布.压缩强度测试结果表明,弹性体具备良好的耐压缩性能,45%压缩应变下循环50次,仍具备良好的回弹性能.有机硅弹性体具有优异的耐高温性能,分解温度为370℃,高于绝大多数多孔有机硅弹性体材料的分解温度.丙烯酸酯改性硅油的制备工艺成熟、廉价易得,显著降低了多孔有机硅弹性体的生产成本,为规模性开发有机硅材料提供了新的思路和应用前景.A stable water-in-oil(W/O)emulsion was prepared by using polyether-modified trisiloxane surfactant,acrylate-modified silicone oil,and water.Porous organosilcone elastomers with double networks were produced after acid-base catalyzed hydrolysis,UV-initiated polymerization,and drying to remove water.Scanning electron microscope(SEM)images show that the elastomers have rich pore structures.Compressive strength tests clearly demonstrate that the elastomers have good compression resistance and still have good resilience performance under 45%compressive strain for 50 cycles.In addition,the prepared silicone elastomers have excellent high temperature resistance,and the decomposition temperature is 370℃,which is higher than the decomposition temperature of most silicone elastomers.The preparation technology of acrylate modified silicone oil is mature,cheap and easy to obtain,which significantly reduces the production cost of porous silicone elastomer,and provides a new idea and application prospect for large-scale development of silicone materials.

关 键 词：硅表面活性剂 有机硅弹性体 油包水乳液 双网络 耐高温 

分 类 号：O648[理学—物理化学]