Assessment of Chitosan gels for the controlled release of agrochemicals
Assessment of Chitosan gels for the controlled release of agrochemicals
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DOI：
10.1021/ie00103a019
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发表时间：
1990-07
影响因子：
4.2
通讯作者：
M. A. Teixeira;W. Paterson;E. J. Dunn;Qiangliang Li;B. K. Hunter;M. Goosen
中科院分区：
文献类型：
--
作者：
M. A. Teixeira;W. Paterson;E. J. Dunn;Qiangliang Li;B. K. Hunter;M. Goosen
壳聚糖凝胶珠和膜的能力，以控制除草剂阿特拉津和肥料尿素的释放进行了评估。壳聚糖溶液与乙酸酐或丙酸酐反应，制备了包埋农药的凝胶珠和凝胶膜。对壳聚糖包衣的阿特拉津微球进行的洗脱研究表明，阿特拉津的初始快速释放，然后是恒定的释放速率。估计壳聚糖凝胶珠能够将阿特拉津的释放期延长至7个月，相比之下，未涂布的对照珠为4天。对壳聚糖包衣的尿素珠进行的洗脱研究表明，与未包衣的尿素对照珠相比，有可能将尿素释放的作用持续时间延长高达180倍
Chitosan gel beads and films were assessed for their ability to control the release of the herbicide atrazine and the fertilizer urea. The gel beads and films, containing entrapped agrochemicals, were prepared by reacting solutions of chitosan with acetic or propionic anhydride. Elution studies conducted on chitosan-coated atrazine beads showedd an initial rapid release of atrazine followed by a constant release rate. The chitosan gel beads were estimated to be able to extend the release period of atrazine to 7 months compared to 4 days for uncoasted control beads. Elution studies performed on chitosan-coated urea beads showed that it was possible to extend the duration of action of urea release by a factor of up to 180 compared to uncoated urea control beads