共混改性聚乳酸基薄膜的制备及其包膜肥的缓释性能研究  

Preparation of Modified PLA Film and Study on Slow Release Performance of Coated Fertilizer

作　　者：王聪莹 王丽敏 石宏岩 崔佳欣 周赫然 WANG Congying;WANG Limin;SHI Hongyan;CUI Jiaxin;ZHOU Heran(School of Resources,Environment and Architectural Engineering,Chifeng University,Chifeng 024000,China;School of Chemistry and Life Sciences,Chifeng University,Chifeng 024000,China)

机构地区：[1]赤峰学院资源环境与建筑工程学院,内蒙古赤峰024000 [2]赤峰学院化学与生命科学学院,内蒙古赤峰024000

出　　处：《生物化工》2024年第2期83-88,共6页Biological Chemical Engineering

摘　　要：以二氯甲烷(DCM)或无水乙醇(EtOH)为溶剂,以聚乳酸(PLA)为原料,通过与聚乙二醇(PEG)、聚丁二酸丁二醇酯(PBS)共混改性制备生物可降解聚合物膜。同时将生物质灰渣与尿素混掺制备球状肥芯,通过高压喷雾包覆10%聚合物膜制备包膜肥颗粒。通过氮素渗透率测试和静水中肥料颗粒氮素渗透实验确定聚合物膜及包膜肥的尿素释放能力。结果表明,以DCM为溶剂,将PLA和PBS共混制备得到的聚合物膜表面结构致密、力学性能与疏水性相对于PLA膜明显提高;以其制备的包膜肥对氮素溶液的渗透系数小,在第1天和第28天的氮素释放率分别为0.27%和40.05%,缓释周期较长。Biodegradable polymer films are prepared by blending polylactic acid(PLA)with polyethylene glycol(PEG)and polybutylene succinate(PBS)in chloroform(DCM)or absolute ethanol(EtOH)as solvent.The surface structure and physical properties of the films are studied by means of FTIR,SEM,mechanical properties,hydrophobic angle and water absorption.Further,biomass ash and urea are mixed to prepare spherical fertilizer core,which is coated with 10%polymer film by high pressure spray.The nitrogen release ability of polymer membrane and coated fertilizer is determined by urea permeability test and nitrogen permeability test in still water.The results show that the polymer membranes prepared by blending DCM with PLA and PBS have compact surface structure and higher mechanical properties and hydrophobicity compared with PLA membrane;the permeability coefficient of coated fertilizer to urea solution is the smallest and the urea release rate is 0.27%and 40.05%on the first day and the 28th day respectively,and a longer sustained-release period.

关 键 词：包膜肥 缓释肥 生物可降解膜 

分 类 号：TQ323[化学工程—合成树脂塑料工业]