文献类型：期刊文献

英文题名：Lipase-catalyzed synthesis of poly(ricinoleic acid) star polymers

作者：Liu, Wenhui[1,2]; Cheng, Yanling[1,2]; Hua, Wei[1,2]; Wang, Wanqing[1,2]

第一作者：Liu, Wenhui

通讯作者：Cheng, Yanling

机构：[1] Biochemical Engineering College, Beijing Union University, Beijing, 100023, China; [2] Beijing Key Laboratory of Biomass Waste Resource Utilization, Beijing, 100023, China

第一机构：北京联合大学生物化学工程学院

年份：2016

卷号：25

期号：2

起止页码：139-146

外文期刊名：International Agricultural Engineering Journal

收录：EI(收录号：20163602772208);Scopus(收录号：2-s2.0-84984666857)

语种：英文

外文关键词：Alcohols - Candida - Lipases - Molecular weight - Polyesters - Silica - Silica gel - Yeast

摘要：Polyesters of poly (ricinoleic acid) and polyol acyl acceptors (trimethylolpropane and pentaerythritol), examples of lipophilic star polymers, were synthesized via bulk polymerization at 50 °C in a three-to-ten day period, using lipases Candida sp.99-125. In the screening of several synthesis procedures, the highest molecular weight occurred when polyricinoleic acid were synthesized from trimethylolpropane mixed with ricinoleic acid using the monomer mole ratio of 1:5 by lipase Candida sp.99-125 as biocatalyst. The reaction result shows that silica gel is much effective as water-absorbent agent for polymerization of polyols and poly (hydroxy acids) compared to the reaction conditions open to the atmosphere. Such a procedure yielded trimethylolpropane-poly(ricinoleic acid) polymers with an average molecular weight from 2000 to 5000 Da with PDI between 1.3 and 1.9, according to GPC analysis and the structure of the polymer were characterized by FT-IR, which could be satisfied for lubricant materials.