两亲性乙基纤维素接枝松香聚合物的合成及自组装  

Synthesis and self-assembly of amphiphilic ethyl cellulose grafted dehydroabietic moiety polymer

作　　者：程增会[1,2] 王基夫 张代晖[1] 王春鹏 储富祥[1] 许凤[2] CHENG Zenghui;WANG Jifu;ZHANG Daihui;WANG Chunpeng;CHU Fuxiang;XU Feng(Institute of Chemical Industry of Foresty Products, CAF;National Engineering Laboratory of Biomass Chemical Utilization;Key and Laboratory of Forest Chemical Engineering, SFA;Key Laboratory of Biomass Energy and Material, Nanjing 210042, Jiangsu, China;College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China)

机构地区：[1]中国林业科学研究院林产化学工业研究所生物质化学利用国家工程实验室国家林业局林产化学工程重点开放性实验室江苏省生物质能源与材料重点实验室,江苏南京210042 [2]北京林业大学材料科学与技术学院,北京100083

出　　处：《化工进展》2019年第3期1476-1481,共6页Chemical Industry and Engineering Progress

基　　金：中央级公益性科研院所基本科研业务费专项(CAFYBB2017ZF003)

摘　　要：通过可逆加成断裂链转移聚合法(RAFT)将脱氢枞酸(2-甲基丙烯酰氧基异丙醇基)酯(DAGMA)单体接枝到乙基纤维素上合成了全生物质基两亲性的乙基纤维素-聚脱氢枞酸(2-甲基丙烯酰氧基异丙醇基)酯共聚物(EC-g-PDAGMA),并制备了聚合物自组装胶束。利用核磁共振氢谱(1H NMR)、凝胶色谱仪(GPC)对聚合物的结构进行了表征,证实成功合成了EC-g-PDAGMA。由于脱氢枞酸的引入,EC-g-PDAGMA接枝共聚物具有明显的紫外吸收性能。利用动态光散射(DLS)和透射电子显微镜(TEM)对聚合物自组装胶束的粒径、胶束溶液的Zeta电位和形貌进行了表征。结果表明,EC-g-PDAGMA共聚物在选择性溶剂THF/H_2O中能够进行自组装形成规整的球形胶束,并且其大小随着聚合物浓度和分子链长而变化,粒径分布较窄,同时胶束具有良好的储存稳定性。Novel biomass-based amphiphilic ethyl cellulose grafted 2-methcryloyloxyisopropanol ester of dehydroabietic acid (EC-g-DAGMA) copolymers was synthesized through the RAFT polymerization, and self-assembled micelles were prepared in the selective solvent THF / H2O. The structure and molecular weight of the polymer was characterized by 1H NMR and gel permeation chromatography (GPC), which confirmed the successful synthesis of EC-g-PDAGMA. The amphiphilic copolymers showed an excellent UV absorption ability due to the presence of rosin based side chains. Dynamic light scattering (DLS), zeta-potential measurement and transmission electron microscopy (TEM) were used to study the self-assembly behavior of the EC-g-DAGMA copolymers. The results showed that the EC-g-PDAGMA copolymers could self-assemble to micelles in the selective solvent THF / H2O with regular spherical morphology and good stabilities. Moreover, the diameters of micelles were influenced by the polymer concentration and molecular weights.

关 键 词：自组装 胶束 乙基纤维素 两亲性 粒度分布 

分 类 号：O632[理学—高分子化学]