新型木塑3D打印材料聚乳酸/木粉复合材料的非等温结晶动力学  

Non-isothermal Crystallization Kinetics of PLA/Wood Powder Composites as New Wood Plastic 3D Printing Material

作　　者：赵鲲鹏[1,2] 巴子钰 张庆法 易维明[1,2] 张健 蔡红珍[1,2] 毕冬梅 

机构地区：[1]山东理工大学农业工程与食品科学学院学院,山东淄博255000 [2]山东省清洁能源工程技术研究中心,山东淄博255000 [3]南京农业大学工学院,江苏南京210095 [4]北京信息科技大学经济管理学院,北京100192

出　　处：《塑料科技》2017年第12期76-80,共5页Plastics Science and Technology

基　　金：2016年山东省重点研发计划(重大关键技术)(2016ZDJS11A01);国家自然科学基金(51406108)

摘　　要：以聚乳酸(PLA)、杨木粉为原料,采用改进过磨头的双螺杆挤出机制备新型木塑3D打印材料PLA/木粉复合材料。利用SEM对新型木塑3D打印材料的断面形貌进行分析表征,利用DSC考察了新型木塑3D打印材料的非等温结晶行为,并利用莫志深方程对新型木塑3D打印材料的结晶动力学进行研究分析。结果表明:PLA/木粉复合材料内部存在大量空洞,而增韧剂POE的加入则会很好的改善这一缺陷,大幅度地减少空洞的数量;莫志深方程可以较好地分析新型木塑3D打印材料的非等温结晶动力学,木粉的加入能够起到一定的异相成核作用,提高了结晶温度,但降低了结晶速率;当木粉含量为20%时,PLA的结晶温度最高,结晶速率最快。A new wood plastic 3 D printing material was prepared with polylactic acid（PLA） and wood powder by double screw extruder whose grinding head was modified. SEM was used to analyze and characterize the cross sectional morphology of the new wood plastic 3 D printing material, the non-isothermal crystallization behavior of the new wood plastic 3 D printing material was investigated by DSC, and the crystallization kinetics was analyzed by Mo＇s equation. The results show that： there are a lot of voids in PLA/wood powder composite, but the toughening agent could improve the defects and reduce the number of voids greatly; Mo＇s equation can be used to analysis non-isothermal crystallization kinetics of the new wood plastic 3 D printing material, and the wood powder plays a nucleating effect, improves the crystallization temperature, but decreases the crystallization rate. When the content of wood powder is 20%, the crystallization temperature of PLA is the highest, and the crystallization rate is the fastest.

关 键 词：聚乳酸 3D打印 复合材料 非等温结晶动力学 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ323.4[化学工程—合成树脂塑料工业]