Demethylation, phenolation, and depolymerization of lignin for the synthesis of lignin-based epoxy resin via a one-pot strategy

doi:10.1016/j.indcrop.2021.114135

GIEC OpenIR

	Demethylation, phenolation, and depolymerization of lignin for the synthesis of lignin-based epoxy resin via a one-pot strategy
	Zhen, Xiang 1,2,3,4; Li, Huiwen1,2,3 ; Xu, Zhongbin1,2,3 ; Wang, Qingfeng 1,2,3,4; Xu, Jin 1,2,3; Zhu, Shunni1,2,3 ; Wang, Zhongming1,2,3 ; Yuan, Zhenhong1,2,3
	2021-12-01
发表期刊	INDUSTRIAL CROPS AND PRODUCTS
ISSN	0926-6690
卷号	173 页码:9
通讯作者	Zhu, Shunni(zhusn@ms.giec.ac.cn) ; Wang, Zhongming(wangzm@ms.giec.ac.cn)
摘要	A one-pot method to synthesize demethylated-phenolated lignin (DPL) and demethylated-phenolated lignin based epoxy resin (DPLINP) using phenol as a phenolic reagent and polymerization inhibitor was proposed in this study. This method avoids the occurrence of polycondensation caused by demethylation and simplifies the synthesis of lignin-based epoxy resins. Phenolated lignin (PL)-based epoxy resin (PLINP) and demethylated lignin (DL)-based epoxy resin (DLINP) were prepared to investigate the effects of different modification methods on the resulting lignin and epoxy resin. The results of H-1 nuclear magnetic resonance (NMR), Fourier transform infrared, and gel permeation chromatography analyses indicated that the introduction of phenol could significantly reduce the occurrence of polycondensation while also decreasing the molecular weight and increasing the content of phenolic hydroxyl in DPL compared with DL and PL. 2D heteronuclear single quantum coherence NMR analysis was used to further investigate the structural changes of lignin during the modification process. The results obtained via dynamic mechanical analysis, flexural test, and impact test demonstrated that demethylated-phenolated lignin-based epoxy network (DPLIEN) possessed an improved cross-linking density, glass transition temperature, and mechanical performance compared with all other epoxy resins. Moreover, the polycondensation of DL caused by demethylation deteriorated the mechanical performance of demethylated lignin-based epoxy network (DLIEN). The thermal stability of DPLIEN was decreased compared with phenolated lignin-based epoxy network (PLIEN), as the removal of methoxy groups may have reduced the protective char layer formation in DPLIEN. This study provides a novel method for the modification of lignin and synthesis of lignin-based epoxy resins.
关键词	Lignin Epoxy resin Demethylation Phenolation One-pot Polycondensation
DOI	10.1016/j.indcrop.2021.114135
关键词[WOS]	KRAFT LIGNIN ; CLEAVAGE ; LINKAGES ; POLYMER
收录类别	SCI
语种	英语
WOS研究方向	Agriculture
WOS类目	Agricultural Engineering ; Agronomy
WOS记录号	WOS:000711829100005
出版者	ELSEVIER
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/35198
专题	中国科学院广州能源研究所
通讯作者	Zhu, Shunni; Wang, Zhongming
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Zhen, Xiang,Li, Huiwen,Xu, Zhongbin,et al. Demethylation, phenolation, and depolymerization of lignin for the synthesis of lignin-based epoxy resin via a one-pot strategy[J]. INDUSTRIAL CROPS AND PRODUCTS,2021,173:9.
APA	Zhen, Xiang.,Li, Huiwen.,Xu, Zhongbin.,Wang, Qingfeng.,Xu, Jin.,...&Yuan, Zhenhong.(2021).Demethylation, phenolation, and depolymerization of lignin for the synthesis of lignin-based epoxy resin via a one-pot strategy.INDUSTRIAL CROPS AND PRODUCTS,173,9.
MLA	Zhen, Xiang,et al."Demethylation, phenolation, and depolymerization of lignin for the synthesis of lignin-based epoxy resin via a one-pot strategy".INDUSTRIAL CROPS AND PRODUCTS 173(2021):9.