共价功能化方法改善PS/MoS_(2)复合材料的性能  

A Covalent Functionalization Approach to Improve the Properties of PS/MoS_(2) Composites

作　　者：李飞翔 郭付海 李果 王腾飞 郭红革[2] 赵健[1,2] LI Feixiang;GUO Fuhai;LI Guo;WANG Tengfei;GUO Hongge;ZHAO Jian(Key Laboratory of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science and Technology,Qingdao 266042,China;School of Printing and Packaging Engineering,Qilu University of Technology,Jinan 250353,China)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东省橡塑材料与工程重点实验室,山东青岛266042 [2]齐鲁工业大学印刷与包装工程学院,山东济南250353

出　　处：《青岛科技大学学报（自然科学版）》2021年第6期59-67,共9页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51873096);山东省自然科学基金项目(ZR201807060363);青岛科技大学开放研究基金项目(QUSTHX201815);四川大学高分子材料工程国家重点实验室开放项目(sklpme2020-4-04).

摘　　要：通过萘/钠和四氢呋喃形成的还原体系与溶剂超声剥离的二硫化钼(MoS_(2))纳米片进行反应,使其表面产生负电荷来进行十二烷基链的共价功能化,反应温和,接枝率高且形成了牢固的共价键合。功能化的MoS_(2)纳米片在聚苯乙烯(PS)基质中实现了良好的分散,随着其含量的增加,PS/MoS_(2)复合材料的机械性能和热性能明显提高。负载1%(质量分数)的功能化纳米片,复合材料的拉伸强度,杨氏模量和储能模量较纯样分别提高了67%,106.7%和59.8%,玻璃化转变温度从纯样的83.2℃提升到93.8℃。另外,PS/1.0%复合材料的焦炭收率达到2.7%,纯PS仅为0.1%。In this study,the reduction system of naphthalene/sodium and tetrahydrofuran was used to react with solvent-exfoliated molybdenum disulfide(MoS_(2))nanosheets to generate negative charges on the MoS_(2) surface and then realized the covalent functionalization of the dodecyl chains.The reaction is mild,the grafting rate is high,and a strong covalent bond is formed.The functionalized MoS_(2) nanosheets achieve good dispersion in the polystyrene(PS)matrix.With the increase of its content,the mechanical and thermal properties of the PS/MoS_(2) composites are significantly improved.When loading 1%(mass concentration)of functionalized MoS_(2) nanosheets,the tensile strength,Young′s modulus and storage modulus of the composite increased by 67%,106.7%and 59.8%respectively compared with the pure sample.The glass transition temperature increased from 83.2℃of the pure sample to 93.8℃.In addition,the coke yield of the PS/1.0%composite reaches 2.7%,and the pure PS is only 0.1%.

关 键 词：共价功能化 二硫化钼 聚苯乙烯 纳米复合材料 

分 类 号：O643.361[理学—物理化学]