Yu Caili, Lu Guangjie, Yan Chengfei, Xu Jianben, Zhang Faai
College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, 541004, China.
College of Materials Science and Engineering, Guilin University of Technology, No 12, Jiangan Road, Guilin, 541004, People's Republic of China.
J Fluoresc. 2023 Jul;33(4):1593-1602. doi: 10.1007/s10895-023-03160-z. Epub 2023 Feb 15.
Rosin-based fluorescent polyurethane emulsion (FPU) was prepared using isophorone diisocyanate, ester of acrylic rosin and glycidyl methacrylate, 1,5-dihydroxy naphthalene (1,5-DN), and 1,4-butanediol as the raw materials. Then, rosin-based fluorescent polyurethane microspheres (FPUMs) were successfully prepared by suspension polymerization method using FPU as the main material, azodiisobutyronitrile as the initiator, and gelatin as the dispersant. FPUMs were characterized by Fourier transform infrared spectra, thermogravimetric analysis, optical microscopy, scanning electron microscopy and fluorescence spectra, and the response performance of FPUMs to pH was studied. The results showed that FPUMs were successfully prepared. With the increase of the level of 1,5-DN, the particle size of FPUMs increased gradually, and the fluorescence intensity increased first and then decreased. When the level of 1,5-DN was 3 wt.%, the average particle size was 49.3 μm, the particle distribution index (PDI) was 1.05, and the fluorescence intensity was the largest (3662 a.u.). The fluorescence intensity of FPUMs increased linearly with the decrease of pH, which can be used for pH detection in solution. Furthermore, the FPUMs exhibited good thermal stability, anti-interference and recoverability.
以异佛尔酮二异氰酸酯、丙烯酸松香酯与甲基丙烯酸缩水甘油酯的酯化物、1,5 - 二羟基萘（1,5 - DN）和1,4 - 丁二醇为原料制备了松香基荧光聚氨酯乳液（FPU）。然后，以FPU为主要原料，偶氮二异丁腈为引发剂，明胶为分散剂，通过悬浮聚合法成功制备了松香基荧光聚氨酯微球（FPUMs）。采用傅里叶变换红外光谱、热重分析、光学显微镜、扫描电子显微镜和荧光光谱对FPUMs进行了表征，并研究了FPUMs对pH的响应性能。结果表明FPUMs制备成功。随着1,5 - DN用量的增加，FPUMs的粒径逐渐增大，荧光强度先增大后减小。当1,5 - DN用量为3 wt.%时，平均粒径为49.3μm，粒径分布指数（PDI）为1.05，荧光强度最大（3662 a.u.）。FPUMs的荧光强度随pH的降低呈线性增加，可用于溶液中的pH检测。此外，FPUMs具有良好的热稳定性、抗干扰性和可回收性。
