PEGMA改性的光固化水性聚氨酯／二氧化硅纳米复合体系  

Synthesis and Properties of UV Curable WPU/SiO_2 Nanocomposites Based on PEGMA Functionalized Colloidal Silica

作　　者：张胜文[1] 赵杰[1] 唐丹丹[1] 孟龙[1] 叶涛[1] 杨刚[1] 

机构地区：[1]江南大学食品胶体与生物技术教育部重点实验室化学与材料工程学院,江苏无锡214122

出　　处：《高分子材料科学与工程》2012年第11期67-71,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51003041);中央高校基本科研业务费专项资金资助(JUSRP11004)

摘　　要：采用水溶性大分子单体(PEGMA)改性纳米二氧化硅水溶胶(R301-PEGMA),并通过反相乳液法制备光固化水性聚氨酯纳米复合乳液。R301-PEGMA的引入使得复合乳液的粒径和黏度明显增大,透射电镜(TEM)、扫描电镜(SEM)和原子力显微镜(AFM)对复合膜微观结构的分析表明,改性纳米二氧化硅均匀分散在聚氨酯基体和涂层表面,动态力学分析表明,改性纳米二氧化硅可显著提高复合膜储存模量,并且tanδ峰出现明显宽化现象,说明R301-PEGMA与聚氨酯之间存在很强的相互作用。A water soluble the aqueous colloidal silica （ poly（ethylene glycol） monomethyl ether methacrylate （PEGMA） was used to modify R301-PEGMA）. The waterborne UV-curable polyurethane （WUPU）/12301-PEGMA nanocomposite was prepared by the phase-inversion emulsification method. These composites exhibit the larger particle size and higher viscosity than those of the WUPU dispersion. TEM and SEM measurements show that R301- PEGMA nanoparticles are well dispersed and integrated in the WUPU matrix. AFM measurements further demonstrate that R301-PEGMA nanoparticles are also well dispersed and embedded at the WUPU film.surface. I）MA analysis demonstrates that the WUPU/R301-PEGMA nanocomposite films shows a broadening of the glass transition and has no obvious glass transition for the nanocomposites with 10 % R301-PEGMA, providing the evidence of the strong covalent bonding interactions between the WUPU chain and R301-PEGMA. The PEGMA functionalized nanocomposite fihns displayed enhanced storage modulus, tensile strength without sacrificing high elongation at break compared to those of the WUPU/R-301 nanocomposite films.

关 键 词：紫外光固化 水性聚氨酯 纳米二氧化硅 膜性能 

分 类 号：TB383[一般工业技术—材料科学与工程]