可生物降解PLA/St/BF复合材料的制备  

Preparation and properties of biodegradable PLA/St/BF composites

作　　者：沈华艳[1,2] 张会平[1] 周盾白[3] 谢东[1] 贾志欣[2] 陈明周[1] 罗远芳[2] Shen Huayan;Zhang Huiping;Zhou Dunbai;Xie Dong;Jia Zhixin;Chen Mingzhou;Luo Yuanfang(Guangdong Key Lab of Sugarcane & Biorefinery,Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute),Guangzhou 510316,China;College of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China;Guangdong Polytechnic of Science and Technology,Guangzhou 510640,China)

机构地区：[1]广东省生物工程研究所(广州甘蔗糖业研究所)广东省甘蔗改良与生物炼制重点实验室,广东省广州市510316 [2]华南理工大学材料科学与工程学院,广东省广州市510641 [3]广东省科技干部学院,广东省广州市510640

出　　处：《合成树脂及塑料》2017年第3期32-35,45,共5页China Synthetic Resin and Plastics

基　　金：广东省应用型科技研发专项资金项目(2015B020235010);广东省科技计划项目(2014B030303004);广州市产学研协同创新项目(201508010022)

摘　　要：以甘油为增塑剂,采用挤出注塑工艺制备了可生物降解聚乳酸(PLA)/淀粉(St)/蔗渣(BF)复合材料,研究了原料配比对复合材料力学性能、吸水性能、热稳定性及流变性能的影响,并利用扫描电子显微镜对复合材料断面进行了观察。结果表明:BF与St用量较大时,制备的PLA/St/BF复合材料仍能保持一定的力学性能,能满足实际加工要求;BF对PLA/St复合材料具有一定的增强作用;增大极性组分St和BF用量会大幅提高PLA/St/BF复合材料的吸水性,且组分间界面间隙变大。The biodegradable polylactic acid(PLA)/starch(St)/bagasse fiber(BF)composites wereprepared via extrusion and injection molding process with glycerin as plasticizer.The effect of raw materialproportion on mechanical properties,water absorption,thermal stability and rheological properties of thecomposites were observed.Scanning electron microscope(SEM)was used to survey the section of the composites.The results show that the composites prepared with high mass fraction of St and BF keep mechanical propertiesat a certain extent and meet the requirements of processing.The mechanical properties of the composites can beimproved by adding BF.The increase of St and BF content can improve the water absorption significantly andwiden the interfacial gaps among different components of the composites.

关 键 词：聚乳酸 淀粉 蔗渣 组分配比 

分 类 号：TB332[一般工业技术—材料科学与工程]