微纳层叠共挤PP/PA6/CNTs原位微纤复合膜的制备及性能研究  

Preparation and Properties of PP/PA6/CNTs In-situ Microfiber Composite Films Based on Microlayer Coextrusion

作　　者：朱钰婷 谷琳 何家隆 吉华建 王玉 朱惠豪 马玉录[1] 谢林生[1] ZHU Yuting;GU Lin;HE Jialong;JI Huajian;WANG Yu;ZHU Huihao;MA Yulu;XIE Linsheng(Engineering Center of Efficient Green Process Equipment and Energy Conservation of Ministry of Education,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学绿色高效过程装备与节能教育部工程研究中心,上海200237

出　　处：《中国塑料》2021年第10期1-7,共7页China Plastics

摘　　要：采用双转子连续混炼挤出机与微纳层叠共挤出成型设备制备了聚丙烯/聚酰胺6/碳纳米管(PP/PA6/CNTs)复合材料和原位微纤复合膜,通过扫描电子显微镜(SEM)、流变仪、差示扫描量热仪(DSC)、万能拉伸试验机及电阻测试仪对其微观结构、流变性能、结晶性能、力学性能和导电性能进行了表征。结果表明,与共混相比,微纳层叠共挤出法使得分散相PA6/CNTs形成了微纤,微纤的形成不仅提升了复合膜的动态流变性能,并且增加了基体PP相的结晶度,提高了PA6相的结晶温度,提升了复合膜的结晶性能;当CNTs含量为0.5%(质量分数,下同)时,复合膜的拉伸强度和断裂伸长率均达到最大值,分别为42.17 MPa和857.82%,体积电阻率(R)下降到104Ω·cm,综合力学性能和导电性能达到最佳。Polypropylene(PP)/polyamide 6(PA6)/carbon nanotubes(CNTs)composites were prepared using a twinrotor continuous mixing extruder and their in-situ microfiber composite films were further fabricated using a micro-nano laminated co-extrusion molding machine.Their microstructure and rheological,crystalline,mechanical,and electrical properties were investigated using scanning electron microscope,rheometer,differential scanning calorimeter,universal tensile tester,and resistance tester.The results showed that PA6/CNTs as a dispersion phase was subjected to form microfibers through a laminated co-extrusion method.The composites not only achieved an improvement in dynamic rheological properties due to the formation of microfibers,but also obtained an increase in the crystallinity and crystallization temperature of the PP phase.The composite films exhibited maximum tensile strength of 42.17 MPa at a CNT content of 0.5 wt%.Their elongation at break reached a maximum value of 857.82%,but their volume resistivity decreased to104Ω·cm.In this case,the composite films showed optimal comprehensive mechanical properties and electrical conductivity.

关 键 词：聚丙烯 聚酰胺6 碳纳米管 原位微纤复合膜 微纳层叠共挤出 

分 类 号：TQ327.8[化学工程—合成树脂塑料工业]