Enhancing catalytic activity via metal tuning of zeolitic imidazole frameworks for ring opening polymerization of L-lactide

Somboon Chaemchuen, Qingping Dai, Jichao Wang, Chenyang Zhu, Nikom Klomkliang, Ye Yuan, Chen Cheng, Mirella Elkadi, Zhixiong Luo, Francis Walter C. Verpoort

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4 Scopus citations

Abstract

A catalyst series of zeolitic imidazole frameworks (ZIFs) with a sodalite (SOD) structure was explored as an effective heterogeneous catalyst for L-lactide polymerization into biodegradable polylactides (PLAs). The catalyst series of ZIF-8, ZIF-67, and bimetallic ZnCo-ZIF was synthesized under the green method (room temperature synthesis), which contained a variance in the metal species/contents. The chemical and physical properties of catalysts were characterized by several techniques to illustrate the relation between catalyst properties and catalytic performance. The results indicated that the metals in the ZIF structure revealed an influencing role in catalytic activities, kinetic rates, and properties of polymer products under bulk ring-opening polymerization of L-lactide. Moreover, the best performing ZIF showed potential as a heterogeneous catalyst since it could be reused at least four times without significant loss of catalytic activity.

Original languageBritish English
Article number118319
JournalApplied Catalysis A: General
Volume624
DOIs
StatePublished - 25 Aug 2021

Keywords

  • Heterogeneous catalyst
  • MOF
  • PLA
  • Ring-opening polymerization
  • ZIF

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