毒死蜱/壳聚糖改性凹凸棒土/海藻酸钠微球的制备与缓释性能

doi:10.16085/j.issn.1000-6613.2017.03.035

化工进展 ›› 2017, Vol. 36 ›› Issue (03): 1033-1040.DOI: 10.16085/j.issn.1000-6613.2017.03.035

毒死蜱/壳聚糖改性凹凸棒土/海藻酸钠微球的制备与缓释性能

陈铧耀¹, 周新华¹, 周红军¹, 杨晓红¹, 徐华¹, 戴修纯²

1 仲恺农业工程学院化学化工学院, 广东广州 510225;
2 广州市农业科学研究院, 广东广州 510308

收稿日期:2016-08-22 修回日期:2016-09-20 出版日期:2017-03-05 发布日期:2017-03-05
通讯作者: 周红军,博士,教授。
作者简介:陈铧耀(1987-),男,博士,讲师,研究方向为农药缓释制剂开发。
基金资助:
国家自然科学基金（21576303）、广东省科技计划（2014A020208126、2015A020209197）、海珠区科技计划（2014-cg-29）及花都区科技计划（HD15CXY002）项目。

Preparation and slow-release performance of chlorpyrifos/chitosan modified attapulgite/sodium alginate microspheres

CHEN Huayao¹, ZHOU Xinhua¹, ZHOU Hongjun¹, YANG Xiaohong¹, XU Hua¹, DAI Xiuchun²

1 College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong, China;
2 Guangzhou Academy of Agricultural Sciences, Guangzhou 510308, Guangdong, China

Received:2016-08-22 Revised:2016-09-20 Online:2017-03-05 Published:2017-03-05

摘要/Abstract

摘要：

采用接枝方法制备了壳聚糖改性凹凸棒土，利用外源挤出法制备了毒死蜱/壳聚糖改性凹凸棒土/海藻酸钠复合微球，利用红外、热重分析和X射线衍射对改性凹凸棒土的结构进行了表征，并研究了改性凹凸棒土对载药微球的载药率、包封率、溶胀性能及缓释性能的影响。结果表明，毒死蜱仍以结晶态存在于复合微球中；壳聚糖改性凹凸棒土复合微球的载药量和包封率均高于相应的酸化凹凸棒土复合微球；加入凹凸棒土降低了载药微球的溶胀率、提高了微球的缓释性能，且壳聚糖改性凹凸棒土在抑制微球溶胀和增强缓释方面优于酸化凹凸棒土；载药微球的释药行为可用HIGUCHI动力学模型来描述。

关键词: 凹凸棒土, 壳聚糖, 毒死蜱, 海藻酸钠, 缓释

Abstract:

Chitosan modified attapulgite(CTs-ATP) was prepared by grafting method. Chlorpyrifos/CTs-ATP/sodium alginate microspheres were prepared by extrusion dripping method. The modified attapulgite was characterized by FTIR,TG and XRD. The effects of modified attapulgite on the loading content of chlorpyrifos(LC),encapsulation efficiency(EE),swelling ratio,and slow-release kinetic were also systematically investigated. The results showed that the loaded chlorpyrifos was in crystalline form in microspheres. CTs-ATP composite microphere has higher LC and EE than acid modified ATP(AC-ATP) composite microphere. The swelling ratios and release rates of microspheres were decreased with adding modified ATP. The CTs-ATP composite microphere exhibits better slow-release and restraining the swelling properties than AC-ATP composite microphere. Their releasing behaviors could be characterized by HIGUCHI equation.

Key words: attapulgite, chitosan, chlorpyrifos, sodium alginate, slow-release

中图分类号:

TQ450.1.4

陈铧耀, 周新华, 周红军, 杨晓红, 徐华, 戴修纯. 毒死蜱/壳聚糖改性凹凸棒土/海藻酸钠微球的制备与缓释性能[J]. 化工进展, 2017, 36(03): 1033-1040.

CHEN Huayao, ZHOU Xinhua, ZHOU Hongjun, YANG Xiaohong, XU Hua, DAI Xiuchun. Preparation and slow-release performance of chlorpyrifos/chitosan modified attapulgite/sodium alginate microspheres[J]. Chemical Industry and Engineering Progress, 2017, 36(03): 1033-1040.

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毒死蜱/壳聚糖改性凹凸棒土/海藻酸钠微球的制备与缓释性能

Preparation and slow-release performance of chlorpyrifos/chitosan modified attapulgite/sodium alginate microspheres

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