碱木质素交联PVA共混啶虫脒缓释薄膜的制备及性能  

Preparation and performance of alkali lignin-PVA crosslinked blend slow-release acetaniprid film

作　　者：任世学[1] 倪海月[1] 田金玲[1] 方桂珍[1] 

机构地区：[1]东北林业大学材料科学与工程学院 生物质材料科学与技术教育部重点实验室

出　　处：《北京林业大学学报》2015年第12期116-121,共6页Journal of Beijing Forestry University

基　　金：“十二五”国家科技支撑计划项目(2012BAD24B0403)

摘　　要：以聚乙烯醇(PVA)和碱木质素为原料,交联剂为乙二醛,采用流延法制备碱木质素交联PVA共混啶虫脒缓释薄膜。采用傅里叶红外光谱方法对薄膜的化学结构进行分析,并表征薄膜的透气性和力学性能。通过单因素试验探索碱木质素与PVA质量比、乙二醛用量、啶虫脒用量对啶虫脒薄膜啶虫脒释放率的影响。结果表明:碱木质素与PVA成功交联,啶虫脒薄膜透氧气量增大,透二氧化碳量降低;啶虫脒薄膜的拉伸强度和断裂伸长率均比交联薄膜低。采用流延成膜法制备啶虫脒薄膜的最佳条件为碱木质素与PVA质量比3∶7、乙二醛用量1.5 m L、啶虫脒用量0.5 g,所制啶虫脒薄膜的啶虫脒释放率为31.8%。药水比例、温度对啶虫脒薄膜的释药快慢有一定影响。With alkali lignin and PVA as raw material,glyoxal as crosslinker,the alkali lignin-PVA crosslinked blend slow-release pesticide film was prepared by tape casting. The chemical structure of the film was analyzed by FT-IR. The gas permeability and mechanical properties were characterized. The results showed that alkali lignin had been crosslinked with PVA successfully. Compared with non-acetaniprid crosslinked film,oxygen transmission of the acetaniprid slow-release film increased,its carbon dioxide transmission reduced, and its tensile strength and elongation at break decreased. The optimum preparation conditions of acetaniprid slow-release film were the mass ratio of alkali lignin and PVA 3∶ 7,glyoxal dosage 1. 5 m L,acetaniprid dosage 0. 5 g,and the release amount of acetaniprid 31. 8%. The water solving method indicated that there is certain effect of potion proportion and temperature on the cumulative release rate of acetaniprid-loaded film.

关 键 词：木质素 聚乙烯醇 乙二醛 啶虫脒 缓释 

分 类 号：S785[农业科学—林学] TQ35[化学工程]