应用化学 ›› 2019, Vol. 36 ›› Issue (4): 414-422.DOI: 10.11944/j.issn.1000-0518.2019.04.180398

• 研究论文 • 上一篇    下一篇

沸石咪唑酯骨架-67高效催化L-丙交酯的开环聚合反应

朱晨阳a,罗志雄b,陈宬b,Chaemchuen Somboonab,Verpoort Francisab*()   

  1. 武汉理工大学a材料科学与工程学院
    b材料复合新技术国家重点实验室 武汉 430070
  • 收稿日期:2018-12-14 接受日期:2019-02-25 出版日期:2019-04-01 发布日期:2019-04-02
  • 通讯作者: Verpoort Francis
  • 基金资助:
    国家自然科学基金(21850410449)资助项目

Zeolitic Imidazolate Framework-67 Efficiently Catalyzes the Ring-Opening Polymerization of L-Lactide

ZHU Chenyanga,LUO Zhixiongb,CHEN Chengb,Chaemchuen Somboonab,Verpoort Francisab*()   

  1. aSchool of Materials Science and Engineering
    bState Key Laboratory of Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
  • Received:2018-12-14 Accepted:2019-02-25 Published:2019-04-01 Online:2019-04-02
  • Contact: Verpoort Francis
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21850410449)

摘要:

为了探究沸石咪唑酯骨架材料(Zeolitic Imidazolate Frameworks,ZIFs)结构中的金属单元对其催化活性的影响,我们采用室温法合成了ZIF-8、Zn/Co-ZIF和ZIF-67,并用其催化L-丙交酯的本体开环聚合反应。 在相同的反应条件下,ZIF-67具有最高的催化活性。 与2-甲基咪唑(配体)作为催化剂相比,ZIF-67催化得到的聚乳酸具有高度全同立构结构。 此外,基质辅助激光解吸-飞行时间(MALDI-TOF)质谱表明,ZIF-67催化得到的聚乳酸主要为线状结构。 经过3次循环反应后,ZIF-67的催化活性没有明显降低。

关键词: 开环聚合反应, 聚乳酸, 沸石咪唑酯骨架-67, 非均相催化

Abstract:

To explore the metal effecting in structure of zeolitic imidazolate frameworks(ZIFs) influenced to its catalytic activity, we have synthesized ZIF-8, Zn/Co-ZIF and ZIF-67 by room temperature method and applied them as catalysts for the bulk ring-opening polymerization of L-lactide. Under the same reaction condition, ZIF-67 shows the highest catalytic activity. Compared to 2-methylimidazolate(linker) as a catalyst under the same reaction condition, the poly(lactic acid) obtained with ZIF-67 has highly isotactic structure. In addition, the matrix assisted laser desorption ionization-time of flight(MALDI-TOF) mass spectrum indicate that the poly(lactic acid) obtained with ZIF-67 has an almost linear structure. ZIF-67 can be reused for three times without significantly loss of catalytic activity.

Key words: ring-opening polymerization, poly(lactic acid), zeolitic imidazolate framework-67, heterogeneous catalysis