Graft polymerization of acrylic monomers onto lignin with CaCl2-H2O2 as initiator: preparation, mechanism, characterization, and application in poly(lactic acid)

Zong, Enmin and Liu, Xiaohuan and Liu, Lina and Wang, Jifu and Song, Pingan and Ma, Zhongqing and Ding, Jie and Fu, Shenyuan (2018) Graft polymerization of acrylic monomers onto lignin with CaCl2-H2O2 as initiator: preparation, mechanism, characterization, and application in poly(lactic acid). ACS Sustainable Chemistry and Engineering, 6 (1). pp. 337-348.

Abstract

Effective utilization of abundant industrial lignin has growingly attracted much attention besides potential
environmental issues. Although chemical graft polymerization modification is one facile strategy for extending its applications, it remains an intractable challenge to select a highly efficient initiation system. We herein have attempt to understand the CaCl2−H2O2 system in initiating the graft polymerization of acrylic monomers onto acetic acid lignin (AAL) and biobutanol lignin (BBL). The initiation system is found to be highly efficient and selective, as proved by the successful graft of polyacrylates onto them, and a possible mechanism is also proposed. Thermal analysis shows that the graft modification results in a higher glass transition temperature and higher thermal stability of lignin. The graft modification make both AAL and BBL become more hydrophobic than before modification. Moreover, adding a small amount of lignin-graft-polyacrylate can considerably improve the UV blocking capability in addition to the reinforcing effect on polylactic acid. This work offers a novel, highly effective, and selective free radical initiation system for functionalizing lignin.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 20 Mar 2019 04:48
Last Modified: 05 Apr 2019 00:58
Uncontrolled Keywords: industrial lignin, initiation system, graft polymerization, poly(lactic acid)
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: 10.1021/acssuschemeng.7b02599
URI: http://eprints.usq.edu.au/id/eprint/35564

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