It is still a challenge to explore self-healable and reprocessable polysiloxane elastomer with improved mechanical strength and superior transparency. In this work, a self-healable and reprocessable polysiloxane elastomer with fine mechanical strength and optical transparency is facilely constructed by thiol-ene photopolymerization between thiol-functionalized silicone resin (MDT-SH) and vinyl-terminated polysiloxane and diboronic ester. The UV radiation intensity, molecular structure of MDT-SH and thiol/ene molar ratio play an important role in the thiol-ene photopolymerization and mechanical properties of polysiloxane elastomer. The damaged elastomer is completely repaired at 80 °C after 3 h, and the waste elastomer can be reprocessed into new items with 90% recovery of mechanical property. More importantly, its transmittance at 400–800 nm is higher than 95%, and it is almost unaffected by the healing process. This self-healable, transparent and tough polysiloxane elastomer has the potential to develop flexible electronics and wearable devices.

探索具有更高机械强度和优异透明度的可自修复和可再加工的聚硅氧烷弹性体仍然是一个挑战。在这项工作中，通过硫醇官能化有机硅树脂 (MDT-SH) 与乙烯基封端的聚硅氧烷和二硼酸酯之间的硫醇-烯光聚合，轻松构建了一种具有良好机械强度和光学透明度的可自修复和可再加工的聚硅氧烷弹性体。紫外辐射强度、MDT-SH的分子结构和硫醇/烯摩尔比对聚硅氧烷弹性体的硫醇-烯光聚合和力学性能起着重要作用。损坏的弹性体在 80°C 下 3 小时后完全修复，废弹性体可重新加工成新产品，机械性能恢复 90%。更重要的是，其在 400-800 nm 处的透光率高于 95%，并且几乎不受愈合过程的影响。这种可自修复、透明且坚韧的聚硅氧烷弹性体具有开发柔性电子产品和可穿戴设备的潜力。