基板交联度效应对聚乙烯吡咯烷酮纳米薄膜去润湿的影响  

Study on the effect of crosslink degree of substrate on the dewetting of polyvinylpyrrolidone nanofilms

作　　者：费凌霄 王雅雪 马禹[1] Fei Lingxiao;Wang Yaxue;Ma Yu(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]纤维材料改性国家重点实验室,东华大学材料与工程学院,上海201620

出　　处：《合成技术及应用》2023年第1期13-17,共5页Synthetic Technology & Application

摘　　要：近年来电子皮肤、柔性传感器等薄膜器件的发展,对基板表面纳米薄膜的完整性和稳定性提出了更高的要求。本文通过光引发的自由基聚合,成功制备了一系列具有不同交联度的聚丙烯酸丁酯基板,通过旋涂法在基板上制备了厚度为75 nm的聚乙烯吡咯烷酮(PVP)薄膜。并采用红外光谱仪、动态机械热分析仪、原子力显微镜等手段对基板和基板上去润湿的薄膜进行表征,对不同基板上的去润湿孔洞密度和生长速率进行了研究。结果表明,基板交联度越大,孔洞生长速率越慢,孔洞密度越高,这是由交联点密度增加和交联点之间平均分子量分布变宽导致的。因此,控制合适的基板交联度有助于制备稳定性更好的纳米薄膜或纳米涂层。In recent years,with the development of electronic skin,flexible sensors and other thin-film devices,the integrity and stability of nanofilms on substrate are required to be higher.The study of dewetting of nanofilms on different substrates can reveal the effect of substrate on the stability of nanofilms,which contributes to the preparation of nanofilms devices with fewer defects,better stability and better comprehensive performance.In this paper,the substrate of polybutyl acrylate of different crosslink degree were prepared by photo-induced radical polymerization,and polyvinylpyrrolidone(PVP)nanofilms(75 nm)were prepared by spin-coating.Infrared spectroscopy,dynamic mechanical thermal analyzer,swelling and atomic force microscopy were used to characterize the substrate and the dewetting of nanofilms,and the density and growth velocity of dewetting hole on different substrates were studied.The results showed that the higher the crosslink degree of substrate,the slower the velocity of dewetting and the higher the density of the dewetting hole,which was caused by the increase of the density of crosslink points and the wider distribution of crosslinking molecular weight.Therefore,controlling the appropriate crosslink degree of the substrate would be helpful to the preparation of nanothin film or nanocoating with better stability.

关 键 词：聚乙烯吡咯烷酮 聚丙烯酸丁酯 纳米薄膜 去润湿 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]