Poly(hydroxy urethane-siloxane)Pressure-sensitive Adhesive:Synthesis,Characterization and Its Usage for Skin-contact Sensors
简介：Silicone-based pressure-sensitive adhesives(Si-PSAs)are valued for their thermal stability,flexibility,and biocompatibility,but their weak bonding strength restricts high-performance use.Polyurethane-modified Si-PSAs enhance adhesion,however diisocyanates remain essen-tial.The raw materials of isocyanates are toxic,and their synthesis involves phosgene.To make up for those shortcomings,a series of poly(hy-droxy urethane-siloxane)PSAs,named as PHUSi here,were synthesized through the ring-opening reaction of cyclic carbonate-functionalized polysiloxanes(PSix-VECz)with various aliphatic diamines.The PSix-VECz precursors were prepared via the hydrosilylation of hydrogen-containing polysiloxanes(PSix-Hy)with 4-vinyl-1,3-dioxolan-2-one(VEC).The chemical structures of PSix-Hy,PSix-VECz and PHUSi were characterized,and bonding properties of PHUSi were systematically evaluated.The influence of architectures on adhesive performance was elucidated through comprehensive analyses,including rheology,crosslink density assessment,and so on.These studies revealed that the tailored design of PHUSi adhesives combine the advantages of traditional Si-PSAs with enhanced adhesion while eliminating isocyanate toxicity.The optimized PHUSi for-mulation achieved remarkable 180° peel strength(76.5 N/m on skin)and maximum probe tack force(1.61 N),enabling secure 24 h attachment of flexible sensors to skin.These properties make PHUSi particularly suitable for medical applications,as demonstrated by successful implementa-tion in flexible electrocardiogram devices,offering a biocompatible,high-performance adhesive.展开
学者：ChaoXieLing-YiLIShu-ShengChuan-YongZongXu-BaoJIANGXiao-liZhuSheng-YuFengXiang-ZhengKong
关键词：Pressure-sensitive adhesivesPolysiloxanePolyhydroxyurethanecyclic carbonateSkin-contact sensor
在线出版日期：2026-04-03 （网站首发日期）
