摘要
首先,以羟基封端的聚二甲基硅氧烷(PDMS-OH)与三甲氧基硼氧六环(TMOB)反应制备冲击硬化聚合物(IHP);然后,采用乙烯基封端聚二甲基硅氧烷(vinyl-PDMS)与甲基含氢硅油(PDMS-H)反应生成交联聚二甲基硅氧烷(交联PDMS);再通过自由基聚合制备聚2-((((丁基氨基)羰基)氧代)甲基丙烯酸丁酯)(PBM);最后,以IHP、PBM和交联PDMS预聚液通过“一锅出”的方式,制备了具有黏附性的吸能弹性体材料(IHP-EA)。其中,IHP作为其动态交联网络提供吸能特性,交联PDMS作为其稳态交联网络提供机械强度,PBM与底物形成高密度氢键提供其黏附性能。采用多种结构表征方法及性能分析手段,探讨了IHP-EA中不同组分对性能的影响。结果表明:IHP-EA在玻璃基材上的黏附强度达198 kPa,且具备良好的转移黏附和多次黏附能力;同时IHP-EA在4.43 m/s的高速冲击下可实现78.44%的能量吸收率,表现出优异的吸能减震性能。
Flexible electronic devices have developed rapidly in recent years,but there are also some drawbacks such as weak interface adhesion and poor energy absorption and buffer ability.Aiming at the above defects,a series of impact hardening polymer elastomer with adhesion(IHP-EA)is designed by in situ crosslinking strategy using the combination of stable and dynamic crosslinking.Herein,the impact harden polymer(IHP)synthesized by silanol-terminated polydimethysiloxane(PDMS-OH)and trimethoxyboroxine(TMOB)constructed a dynamic crosslinking network to provide self-healing and energy absorption characteristics.The chemical crosslinked polydimethysiloxane(PDMS)network increased mechanical strength.Poly2-((((butylamino)carbonyl)oxo)methacrylate)(PBM)was prepared by free radical polymerization as an adhesion functional component to form high density hydrogen bonds with the substrate.The tensile strength and elongation at break of IHP-EA are 0.26 MPa and 177%,respectively,at strain rates of 50 mm/min.Normally,the toughness of PDMS materials rapidly decreased with the increasing of strain rate,while on the contrast,IHP-EA showed an obviously increasing toughness together with the increasing tensile rate,which indicated the significant strain rate responsiveness of IHP-EA.Therefore,IHP-EA has outstanding energy absorption and buffer effect,and the impact energy absorption efficiency could reach higher than 78%under an impact velocity of 4.43 m/s,much higher than that of conventional PDMS elastomer.In addition,IHP-EA has excellent interfacial adhesion performance,with the adhesion strength on glass substrate up to 198 kPa,almost 100 times higher than ordinary PDMS materials.In addition,IHP-EA also performed self-healing characteristic(healing efficiency exceeds 88%)and transparent performance(greater than 90%).These outstanding properties make the IHP-EA a potential candidate for application in flexible electronics and wearable protective materials.
作者
刘莹
张浩
黄晓娜
张帆
白云刚
周超
徐昆
王丕新
LIU Ying;ZHANG Hao;HUANG Xiaona;ZHANG Fan;BAI Yungang;ZHOU Chao;XU Kun;WANG Pixin(College of Chemical Engineering,Changchun University of Technology,Changchun 130012,China;Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)
出处
《功能高分子学报》
CAS
CSCD
北大核心
2023年第4期408-416,I0005,共10页
Journal of Functional Polymers
基金
吉林省科技发展计划项目(20220201129 GX)。
关键词
界面黏附
吸能弹性体材料
减震
自愈
机械强度
interface adhesion
energy absorbing elastomer
cushioning
self-healing
mechanical strength
