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首页> 美国卫生研究院文献>Polymers >Enhanced Anti-Ultraviolet and Thermal Stability of a Pesticide via Modification of a Volatile Organic Compound (VOC)-Free Vinyl-Silsesquioxane in Desert Areas
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Enhanced Anti-Ultraviolet and Thermal Stability of a Pesticide via Modification of a Volatile Organic Compound (VOC)-Free Vinyl-Silsesquioxane in Desert Areas

机译：通过改性无挥发性有机化合物（VOC）的乙烯基倍半硅氧烷增强农药的抗紫外线和热稳定性

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摘要

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.
机译：由于严酷的环境条件（例如高温，吹沙和紫外线）的影响，常规农药的应用一再未能充分控制沙漠地区的蚊子和沙蝇种群。在这项研究中，将乙烯基倍半硅氧烷（VS）添加到农药（柠檬醛）中，以在引发剂存在下通过三个双键反应增强残留，热和抗紫外线性能：（1）VS和柠檬醛的连接，（2）VS的自由基自聚合，（3）柠檬醛的自由基自聚合。 VS-柠檬醛是VS和柠檬醛共聚的预期和主要产物，使用标准光谱技术进行了表征。自由基聚合的分子结果通过MALDITOF光谱分析。使用扫描分光光度法（SSP）和热重分析（TGA）测试了VS-柠檬醛系统的抗紫外线和热稳定性。 VS-柠檬醛的排斥性随时间而降低，从0小时的97.63％降至1小时的72.98％和2小时的60.0％，柠檬醛的排斥性也从0小时的89.56％降至1小时的62.73％和50.95 2小时的％。

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