Structural Changes of Poplar Wood Lignin during Acetic Acid-Sodium Acetate Buffer Pretreatment Process

摘要：

　　Hydrothermal pretreatment of the poplar wood chips was performed in acetic acid/sodium acetate buffer media under a determined condition.To characterize the structural features of lignin in the pretreated poplar wood,milled wood lignin(MWL)isolated from both the native poplar wood and the pretreated wood chips was analyzed by 1H-NMR,13C-NMR,31P-NMR,FT-IR spectroscopy,as well asGPC-MALLS.The results indicated that the lignin remaining in the pretreated wood chips had more phenolic OH group,less aliphatic OH group,higher molecular weight,and narrower polydispersity than the native poplar lignin.The acetic acid-sodium acetate buffer pretreatment promoted the removal of-OCH3 groups and the cleavage of the inter-unit linkages of β-O-4 bond in the lignin.Furthermore,the repolymerization reaction between the lignin molecule happened during the acetic acid-sodium acetate buffer pretreatment process,but it was less than autohydrolysis.

关键词： poplar wood acetic acid/sodium acetate buffer pretreatment lignin structure repolymerization reaction

作者: Quanshui Yu Yingjuan Fu Zhiyong Shao Fengshan Zhang Menghua Qin

作者单位: Key Laboratory of Pulp & Paper Science and Technology of the Ministry of Education,Qilu University o Huatai Group Corp.Ltd.,Dongying,Shandong,257335,China Huatai Group Corp.Ltd.,Dongying,Shandong,257335,China;Organic Chemistry Laboratory,Taishan Universit

会议类型: 国际会议

会议名称: 第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)

会议地点: 广州

会议语种:英文

页码: 1-5

在线出版日期: 2016-11-07（万方平台首次上网日期，不代表论文的发表时间）