紫外光固化纳米溶胶/聚氨酯丙烯酸酯杂化材料的制备与性能

The preparation and properties of UV-curable organic-inorganic hybrid materials

以γ-甲基丙烯酰氧丙基三甲氧基硅烷为原料,采用溶胶-凝胶法合成了可紫外光固化的纳米溶胶,采用红外光谱(FT-IR)、核磁共振(NMR)和透射电镜(SEM)对其结构、粒径大小和分布进行了分析表征。采用聚酯多元醇、甲苯二异氰酸酯(TDI)、丙烯酸羟乙酯(HEA)为原料,合成了聚氨酯丙烯酸酯。利用合成的可紫外光固化的纳米溶胶和聚氨酯丙烯酸酯制备了紫外光固化有机/无机纳米杂化材料,对纳米杂化材料的力学性能进行了测试。实验结果表明,随着纳米溶胶含量的增加,杂化材料的力学性能、附着力等均得到了提高,当纳米溶胶质量分数达到20%时,涂膜硬度可增至3H,纳米溶胶质量分数为10%时涂膜的附着力即可达到最高的0级;纳米粒子在有机相中分散良好。

A nano-sol has been prepared by a sol-gel method using γ-methacryloxypropyhrimethoxysilane. The mi- crostructure of the nano-sol was characterized by FT-IR, NMR and SEM. Urethane acrylate was prepared using pol- yester polyols, toluene diisocyanate （TDI） and 2-hydroxyethyl acrylate （HEA） and UV hybrid films were formula- ted using the nano-sol, the urethane acrylate and a photoinitiator. The mechanical properties of the hybrid materials were tested. The results showed that the mechanical properties and the adhesion of the hybrid material improved with increasing nano-sol content. When the eontent of nano-sol was 20% , the pencil hardness of the film reached 3 H, and when the content of the nano-sol was 10% , the adhesion of the film reached the highest level of 0. The nano-particles were well dispersed in the organic phase.