淀粉聚乳酸共混材料的制备及力学性能的研究要点分析.docVIP

（2014届） 本科毕业设计（论文）资料 题目名称 ： 淀粉/聚乳酸共混材料的制备及力学 性能的研究 学院（部） ： 专业 ： 学生姓名 ： 班级 ： 学号： 指导教师姓名 ： 职称： 职称： 最终评定成绩 ： 湖南工业大学教务处 xxxxxxxx大学 本科毕业论文（设计）诚信声明 本人郑重声明：所呈交的毕业论文（设计），题目《淀粉/聚乳酸共混材料的制备及力学性能的研究》是本人在指导教师的指导下，进行研究工作所取得的成果。对本文的研究作出重要贡献的个人和集体，均已在文章以明确方式注明。除此之外，本论文（设计）不包含任何其他个人或集体已经发表或撰写过的作品成果。本人完全意识到本声明应承担的责任。 作者签名：（此处连同下面的日期用手写） 日 期： 年 月 日 摘 要 淀粉、聚乳酸都是可降解生物材料，价格低廉。研究表明 关键词：可降解材料；淀粉；聚乳酸；纳米二氧化硅 ABSTRACT Starch, biological material is biodegradable poly (lactic acid) (PLA), starch price is low, has good biocompatibility and biodegradability. Polylactic acid expensive by starch blending with poly (lactic acid) (PLA) to reduce the cost of production, blending system is poor hydrophilicity of starch granules and hydrophobic forces weak blend of poly (lactic acid) (PLA) interface. Therefore the toughening modification of starch is the focus of foreign wine in China. This article is mainly to toughening modification of starch, study the effect of blending modification on mechanical properties. The first is the preparation of different content of starch/polylactic acid blend material, through the twin screw extruder extrusion and granulation, in through the injection molding machine will blend material injection into spline, spline with mechanics performance test of injection molding, testing the tensile strength, elongation at break. Choose the performance of a group of materials, the best processing technology. Research shows that the starch/polylactic acid blend system, with the increase of adding coupling agents and nano silicon dioxide, blending system appeared the change of the curve, with the increase of polylactic acid content in the elongation at break increased in the lower, the resulting optimal formula of the coupling agent, nanometer silicon dioxide, the optimal proportion of starch and glycerol content. Of the modified starch can be obtained through the mechanical properties of materials by mechanical performance is better than no