Wang Chenglong, Qiao Luyang, Zhai Qiang, Yan Kai, Wang Lili, Zheng Jinhuan
Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China.
China Textile Engineering Society, Beijing 100025, China.
Polymers (Basel). 2021 Nov 17;13(22):3977. doi: 10.3390/polym13223977.
Herein, a polyurethane acrylate-based TiO (PU-TiO) was fabricated using a two-step method. First, a polyurethane prepolymer was prepared. Second, PU-TiO was prepared using amino-modified TiO (A-TiO). The best synthesis process of the polyurethane prepolymer was when the reaction temperature was 80 °C, the reaction time was 3 h and the -value of the polyurethane acrylate was 2. Next, the influence of the A-TiO content on the structure and performance of PU-TiO was examined. The analysis of the rheological properties of the PU-TiO ink indicated that its viscosity gradually increased as the A-TiO content increased. The tensile performance of film improved because of the presence of A-TiO. The photo-polymerisation and photo-rheological performance indicated that the PU-TiO structure changed from a hyperbranched structure with TiO as the core to a segmented structure, as the A-TiO content was 3%.
在此，采用两步法制备了一种基于聚氨酯丙烯酸酯的TiO（PU-TiO）。首先，制备聚氨酯预聚物。其次，使用氨基改性TiO（A-TiO）制备PU-TiO。聚氨酯预聚物的最佳合成工艺为反应温度80℃、反应时间3h且聚氨酯丙烯酸酯的 值为2。接下来，研究了A-TiO含量对PU-TiO结构和性能的影响。PU-TiO油墨的流变性能分析表明，随着A-TiO含量的增加，其粘度逐渐增大。由于A-TiO的存在，薄膜的拉伸性能得到改善。光聚合和光流变性能表明，当A-TiO含量为3%时，PU-TiO结构从以TiO为核的超支化结构转变为嵌段结构。
