丙基噁唑啉改性微晶纤维素增强增韧聚乳酸的研究  

Reinforcing and toughening polylactic acid with propyloxazoline modified microcrystalline cellulose

作　　者：王碟 单玉华[1] 蔡志祥 刘玮 胡林玲 刘平[1] WANG Die;SHAN Yu-hua;CAI Zhi-xiang;LIU Wei;HU Lin-ling;LIU Ping(Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]江苏省先进催化与绿色制造协同创新中心,常州大学石油化工学院,江苏常州213164

出　　处：《现代化工》2024年第3期188-193,共6页Modern Chemical Industry

摘　　要：利用丙基唑啉(POZ)对微晶纤维素(MCC)进行化学改性得到酰胺化微晶纤维素(AD-MCC),AD-MCC与聚乳酸(PLA)通过熔融共混法制备AD-MCC/PLA复合材料。利用FT-IR、SEM、XRD、TG、万能试验机等研究了AD-MCC的制备条件,并考察了AD-MCC添加质量分数对AD-MCC/PLA的性能影响。结果表明,在甲醇钠催化下120℃反应8 h,可得到POZ接枝率为31.47%的AD-MCC;AD-MCC提高了MCC与PLA的相容性,使PLA力学性能显著提高;添加2.5%AD-MCC可使PLA复合材料的拉伸强度提高26%,断裂伸长率提高61%,冲击强度提高57%。Microcrystalline cellulose(MCC)is chemically modified with propyloxazoline(POZ)to obtain an amidated microcrystalline cellulose(AD-MCC).AD-MCC/PLA composites are prepared through melt blending of ADMCC and polylactic acid(PLA).The preparation conditions for AD-MCC are explored by means of Fourier transform infrared spectrometer,scanning electron microscope,X-ray powder diffraction,thermogravimetric analyzer,and universal testing machine.The effect of AD-MCC addition amount on the properties of AD-MCC/PLA is studied.It is shown by the results that AD-MCC with a POZ grafting ratio of 31.47%is obtained after the reaction has performed for 8 h at 120℃under the catalysis of NaOCH3.AD-MCC improves the compatibility between MCC and PLA,and significantly enhances the mechanical properties of PLA.Compared with pure PLA,the tensile strength,elongation at break and impact strength of AD-MCC/PLA with 2.5%(wt.)of AD-MCC are increased by 26%,61%and 57%,respectively.

关 键 词：聚乳酸(PLA) 丙基噁唑啉(POZ) 酰胺化微晶纤维素(AD-MCC) 增强 增韧 

分 类 号：TQ325[化学工程—合成树脂塑料工业]