聚乳酸/苹果套袋复合材料的制作工艺研究  

Study on preparation technology of polylactic acid/apple bagging nanocomposite

作　　者：张伟[1] 刘菲[2] 

机构地区：[1]西安理工大学,西安710048 [2]西安工程大学,西安710048

出　　处：《化工新型材料》2013年第9期71-72,75,共3页New Chemical Materials

基　　金：西安地区特色果品保鲜贮运包装技术的研究开发;西安市科技局科技计划项目(NC08018)

摘　　要：采用双螺杆挤出机熔融共混法,加入有机蒙脱土(OMMT)和增塑剂对聚乳酸(PLA)进行有机改性,制备聚乳酸/有机蒙脱土(PLA/OMMT)纳米级苹果套袋原料,并采用高速挤出机吹塑制膜,研究其制作工艺参数。结果表明:吹膜工艺参数为挤出机螺杆转速900r/min,吹胀比为2,牵引速率为5.5m/min,复合材料的拉伸强度和断裂伸长率达到32MPa和150.8%;制袋参数为热封温度155℃、热封压力500P、热封时间1s,可生产出绿色环保的苹果套袋,能够取代聚乙烯苹果套袋,实现生态农业生产。PLA which was added organic montmorillonite（OMMT）and plasticizer were prepared by twin-screw extruder melt blending method to organic modification, poly（lactic acid）/organic montmorillonite（PLA/OMMT）nanoscale apple bagging o riginal materials were prepared, then adopting high speed extrusion machine to blow film, The production process parametdrs were studied. The results showed that film blowing process parameters as follows： the extruder screw speed was 900 r/rain, blow ratio was 2,traction rate was 5. 5 m/min, the tensile strength and elongation at break reached 32 MPa and 150. 8% respectively. When heat sealing temperature 155℃, heat sealing pressure 500p, heat sealing time ls, the green apple bagging can be produced, and to re place polyethylene apple bagging, so ecological agricultural production was realized.

关 键 词：聚乳酸 苹果套袋 复合材料 

分 类 号：TQ321.2[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]