DEPs/木质素复合黏结剂的制备及性能研究  

Preparation and Performance of DEPs/Lignin Composite Binder

作　　者：刘学 何明辉 袁鹏飞 左帅 陈广学 LIU Xue;HE Minghui;YUAN Pengfei;ZUO Shuai;CHEN Guangxue(College of Light Industry Science and Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学轻工科学与工程学院,广州510641

出　　处：《包装工程》2024年第15期30-40,共11页Packaging Engineering

基　　金：国家自然科学基金(51973065);广东省自然科学基金(2020A1515011381)。

摘　　要：目的低共熔聚合物(DEPs)具有绿色环保、可设计性及生物相容性等特性,通过共混木质素(Lignin)合成制备具有良好的力学性能、热学性能和电化学性能的聚合物复合黏结剂,并探索其在新能源电池电极涂层领域的应用。方法以合成得到的可聚合低共熔溶剂(PDES)单体为基底,共混不同质量分数的木质素得到不同比例的PDES单体/木质素复合材料,通过热引发聚合制备得到DEPs/木质素复合黏结剂,并对复合黏结剂进行结构、力学性能、热学性能、表面形貌的分析,并在锂离子电池应用中探究电化学性能。结果通过实验得出,当选用一水合甜菜碱(betaine)-丙烯酸(AA)型PDES单体,木质素质量分数为6%时,制备的DEPs/木质素复合黏结剂综合各项性能最优,应用在硅(Si)电极中能够较好地控制体积变化问题,获得良好的电化学性能。结论制备获得了DEPs/木质素复合黏结剂,该黏结剂绿色环保、成本低、合成工艺简单、各项性能优异,可应用于新能源锂电池领域以及扩大木质素高价值化利用途径。Deep eutectic polymers(DEPs)have the properties of green,designability and biocompatibility.The work aims to prepare polymer composite binders with good mechanical,thermal and electrochemical properties by blending lignin to explore their applications in electrode coatings for new energy batteries.The synthesized polymerizable deep eutectic solvent(PDES)monomer was used as the substrate,and lignin of different mass fractions was blended to obtain PDES monomer/lignin composites of different ratios,and DEPs/lignin composite binders were prepared by heat-initiated polymerization,and the composite binders were analyzed in terms of their structure,mechanical properties,thermal properties,surface morphology.The electrochemical properties were investigated for lithium-ion battery applications.The experiment showed that the DEPs/lignin composite binder prepared with betaine monohydrate(Btm)-acrylic acid(AA)type PDES monomer and lignin mass fraction of 6%had the best overall performance,and it could be used in silicon(Si)electrodes to control the volume change problem and obtain good electrochemical properties.The DEPs/lignin composite binder is prepared,which is green,and featured with low cost,simple synthesis process,and excellent performance.It can be applied in the field of new energy lithium batteries and expanding the high value of lignin utilization.

关 键 词：黏结剂 低共熔聚合物(DEPs) 木质素 可聚合低共熔溶剂(PDES)单体 硅电极 

分 类 号：TB33[一般工业技术—材料科学与工程]