水土保持通报2012，Vol.32Issue(3)：107-110,132,5.
可降解聚乳酸沙障降解性能研究
Degradation Characteristics of Degradable Polylactic Acid Sand Barrier
摘要
Abstract
In order to understand the degradation characteristics of polylactic acid（PLA） square sand barriers,the PLA square sand barriers paved for 3.5 years were investigated in different slope directions and at different slope positions in the U Lan Buh Desert.Changes in the mechanical properties of the PLA sand barriers were studied by means of yarn tensile test.Changes in loss ratio were weighed by electronic balance and changes in surface morphology of sand barriers were described by environmental scanning electron microscope（ESEM）.Results are as follows： Compared with the original PLA sand barriers,yarn breaking tenacities of four positions of the PLA sand barrier decreased differently with slope position ascending,and the order from low to high was windward side,top side,leeward side and ground side.Loss ratios gradually increased from the bottom to the top of the slope.The degradation of exposed section of the sand barrier was more serious than that of ground section.Blastation and abrasion by wind flow is the most important factor to the degradation of the PLA sand barrier,ultraviolet irradiation is in the second place,and microorganism in sandy soil has the minimal impact.关键词
乌兰布和沙漠/聚乳酸（PLA）沙障/降解性能Key words
U Lan Buh Desert/polylactic acid sand barrier/degradation characteristic分类
农业科技引用本文复制引用
原伟杰,虞毅,王戈,高永,高君亮,王淮亮..可降解聚乳酸沙障降解性能研究[J].水土保持通报,2012,32(3):107-110,132,5.基金项目
国家自然科学基金项目“沙袋沙障的构造参数及工程尺度与防风固沙机理研究” （）
