纤维素科学与技术2023，Vol.31Issue(4)：49-57,9.DOI:10.16561/j.cnki.xws.2023.04.03
烷基烯酮二聚体改性木粉/聚丙烯复合材料的流变性能研究
Effect of Alkyl Ketene Dimer Treatment on the Rheological Properties of Wood Fiber/Polypropylene Composite Materials
摘要
Abstract
To improve the rheological properties of wood-plastic composites(WPC),this study systematically delved into the influence of wood fiber(WF),subjected to diverse contents of alkyl ketene dimer(AKD)modification,on the processing and structural rheological characteristics of WPC.The experimental findings underscored a notable trend:as the mass ratio of AKD to WF increased from 0:100 to 12:100,the equilibrium torque,shear heat,and extrusion pressure of the WPC melt exhibited a discernible decrease,marking reductions of up to 21.05%,15.27%,and 30.93%,respectively.At a scanning frequency of 0.05 rad·s⁻¹,the storage modulus,loss modulus,and complex viscosity of the WPC melt registered significant decreases of up to 27.76%,25.82%,and 26.87%,respectively,in correlation with the ascending AKD content.Dynamic frequency scanning elucidated that AKD modification played a crucial role in weakening the interaction both between WF and polypropylene(PP)and within the WF particles themselves.Moreover,The Han plot and Cole-Cole plot indicated that the WPC melts displayed solid-like rheological behavior with a multi-scale long-time relaxation mechanism.The rheological characteristics associated with the incompatibility between WF and PP gradually diminished with increasing AKD content.Microscopic morphology of the cross-section further substantiated these observations,revealing that the heightened AKD content led to a weakening of the WPC interfacial adhesion,consequently resulting in a decline in mechanical properties.In conclusion,this study not only provided a practical foundation but also served as a valuable technical reference for the efficient processing and comprehensive understanding of the rheological properties of WPC.关键词
木塑复合材料/流变性能/AKD改性/表面自由能/界面结合Key words
wood-plastic composite/rheological properties/AKD modification/surface free energy/interfacial adhesion分类
通用工业技术引用本文复制引用
徐俊杰,韦晨锋,朱莽,郝笑龙,赵悦英,韩玉杰,化明志,欧荣贤..烷基烯酮二聚体改性木粉/聚丙烯复合材料的流变性能研究[J].纤维素科学与技术,2023,31(4):49-57,9.基金项目
国家自然科学基金(32071698) （32071698）
广东省重点领域研发计划项目(2020B0202010008) （2020B0202010008）
广东省自然科学基金项目(2023A1515012640). （2023A1515012640）
