Lin Derong, Kong Maozhu, Li Liangyu, Li Xindan, Zhang Xingwen
College of Food Science, Sichuan Agricultural University, Ya'an 625014, China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Polymers (Basel). 2016 Aug 4;8(8):282. doi: 10.3390/polym8080282.
Due to the effect of severe environmental conditions, such as intense heat, blowing sand, and ultraviolet light, conventional pesticide applications have repeatedly failed to adequately control mosquito and sandfly populations in desert areas. In this study, a vinyl silsesquioxane (VS) was added to a pesticide (citral) to enhance residual, thermal and anti-ultraviolet properties via three double-bond reactions in the presence of an initiator: (1) the connection of VS and citral, (2) a radical self-polymerization of VS and (3) a radical self-polymerization of citral. VS-citral, the expected and main product of the copolymerization of VS and citral, was characterized using standard spectrum techniques. The molecular consequences of the free radical polymerization were analyzed by MALDITOF spectrometry. Anti-ultraviolet and thermal stability properties of the VS-citral system were tested using scanning spectrophotometry (SSP) and thermogravimetric analysis (TGA). The repellency of VS-citral decreased over time, from 97.63% at 0 h to 72.98% at 1 h and 60.0% at 2 h, as did the repellency of citral, from 89.56% at 0 h to 62.73% at 1 h and 50.95% at 2 h.
由于酷热、风沙和紫外线等恶劣环境条件的影响，传统农药在沙漠地区控制蚊虫和白蛉种群的应用屡屡未能达到充分的效果。在本研究中，将乙烯基倍半硅氧烷（VS）添加到一种农药（柠檬醛）中，通过在引发剂存在下的三个双键反应来增强残留、热和抗紫外线性能：（1）VS与柠檬醛的连接，（2）VS的自由基自聚合，以及（3）柠檬醛的自由基自聚合。使用标准光谱技术对VS - 柠檬醛（VS和柠檬醛共聚的预期主要产物）进行了表征。通过基质辅助激光解吸电离飞行时间质谱法（MALDITOF）分析了自由基聚合的分子结果。使用扫描分光光度法（SSP）和热重分析（TGA）测试了VS - 柠檬醛体系的抗紫外线和热稳定性性能。VS - 柠檬醛的驱避性随时间下降，从0小时时的97.63%降至1小时时的72.98%和2小时时的60.0%，柠檬醛的驱避性也如此，从0小时时的89.56%降至1小时时的62.73%和2小时时的50.95%。
