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Polymers 2016, 8(8), 282; doi:10.3390/polym8080282

Enhanced Anti-Ultraviolet and Thermal Stability of a Pesticide via Modification of a Volatile Organic Compound (VOC)-Free Vinyl-Silsesquioxane in Desert Areas

1
College of Food Science, Sichuan Agricultural University, Ya’an 625014, China
2
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
*
Author to whom correspondence should be addressed.
Academic Editors: Joannis K. Kallitsis and Georgios Bokias
Received: 13 June 2016 / Revised: 25 July 2016 / Accepted: 28 July 2016 / Published: 4 August 2016
(This article belongs to the Special Issue Hybrid Polymeric Materials)
View Full-Text   |   Download PDF [1516 KB, uploaded 9 August 2016]   |  

Abstract

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. View Full-Text
Keywords: silsesquioxane (SSO); pesticide (citral); polymerization; polymer delivery system; repellency silsesquioxane (SSO); pesticide (citral); polymerization; polymer delivery system; repellency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lin, D.; Kong, M.; Li, L.; Li, X.; Zhang, X. Enhanced Anti-Ultraviolet and Thermal Stability of a Pesticide via Modification of a Volatile Organic Compound (VOC)-Free Vinyl-Silsesquioxane in Desert Areas. Polymers 2016, 8, 282.

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