摘　要：为降低农药使用量，减少农药造成的环境危害，采用60Co γ射线辐射合成了淀粉基农药缓释材料及不含淀粉的聚合物，研究了它们的旋转黏度、可降解性及淀粉基农药缓释材料对吡蚜酮的缓释效果。淀粉基农药缓释材料的可降解性优于不含淀粉的聚合物，其负载吡蚜酮的缓释效果优于凹凸棒土、马铃薯淀粉。5 min时，空白、凹凸棒土、淀粉和淀粉基农药缓释材料负载吡蚜酮的释放百分率分别为大于90%、大于50%和10%～20%；20 min时，空白、凹凸棒土、淀粉和淀粉基农药缓释材料负载吡蚜酮的释放百分率分别为99%以上、大于85%和51%～62%。
关键词：农药缓释材料；辐射制备；淀粉基；缓释效果；降解性
中图分类号：TS236.9                                 文献标志码：A              DOI：10.3969/j.issn.1007-7146.2022.05.007

Abstract: In order to reduce the use of pesticide and the environmental damage of pesticide, starch-based pesticide sustained-release materials and starch-free polymers were synthesized by 60Co γ-ray irradiation. The rotational viscosity, degradability and the sustained-release effects of pymetrozine were studied. The degradability of starch-based material is better than that of starch-free polymers and the pymetrozine sustained-release effect is better than that of attapulgite and starch constrast. At 5 minutes, the pymetrozine release percentage of blank sample was more than 90%, that of attapulgite or starch constrast was more than 50%, and that of starch-based materials was in the range of 10%～20%. At 20 minutes, the pymetrozine release percentage of blank sample was more than 99%, that of attapulgite or starch constrast were more than 85%, and that of starch-based materials was 51%～62%.
Key words: pesticide sustained release material; radiation preparation; starch-based; sustained-release effect; degradability
（Acta Laser Biology Sinica, 2022, 31(5): 427-432）