催化学报 ›› 2012, Vol. 33 ›› Issue (3): 432-438.DOI: 10.1016/S1872-2067(11)60336-7

• 研究论文 • 上一篇    下一篇

脂肪酶催化缩聚法合成可完全降解的聚羟基丙酸酯

宋昊1,2, 赵永杰1, 张颖鑫1,2, 孔维宝1,2, 夏春谷1,*   

  1. 1中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室, 甘肃兰州 730000; 2中国科学院研究生院, 北京 100049
  • 收稿日期:2011-09-19 修回日期:2011-11-07 出版日期:2012-03-15 发布日期:2015-07-27

Synthesis of Polyhydroxyalkanoates by Polymerization of Methyl 3-Hydroxypropionate in the Catalysis of Lipase

SONG Hao1,2, ZHAO Yongjie1, ZHANG Yingxin1,2, KONG Weibao1,2, XIA Chungu1,*   

  1. 1State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-09-19 Revised:2011-11-07 Online:2012-03-15 Published:2015-07-27

摘要: 以 3-羟基丙酸甲酯为聚合单体, 建立了以固定化脂肪酶 Novozym 435 为催化剂的酶催化缩聚反应体系, 合成可完全降解的高分子聚酯聚羟基丙酸酯, 考察了反应条件和介质对反应性能的影响, 结果表明, 纯度大于 95% 的单体即可在温和条件下合成聚羟基羧酸酯; 降低反应压力可有效提升产物产率和分子量. 通过选择合适的有机溶剂介质和表面活性剂, 可使产物分子量提升至 13000 (Mw) 以上. 脂肪酶催化剂重复利用能力优异, 经 6 批次反应后, 其相对活性保持在 95% 以上.

关键词: 聚羟基羧酸酯, 聚合, 酶催化, 脂肪酶, 3-羟基丙酸甲酯

Abstract: The polymerization of methyl 3-hydroxypropionate as monomer catalyzed by lipase was selected as a model system in this study. The monomer with the purity around 95% could be polymerized to polyhydroxyalkanoates in the catalysis of Novozym 435. Decreasing the reaction pressure would result in the increase of product yield and high molecular weight. By choosing appropriate organic solvents, surfactants and reaction pressure, the molecular weight of polyhydroxy propionate polyester could be controlled from 1800 to 13000 (Mw value). The reusing ability of enzymatic catalyst was comparatively good. The relative activity could be maintained above 95% after 6 repeated batches reaction.

Key words: polyhydroxyalkanoates, polymerization, enzyme catalysis, lipase, methyl 3-hydroxypropionate