Characterization and antioxidant activity analysis of purified lignin from enzymatic hydrolysis residue of corn straw

摘要：

　　In this work,the purified enzymatic hydrolysis lignin(EHL)was isolated from enzymatic hydrolysis residue(EHR)by neutral solvent composed of 1,4-dioxane and water(3:1,v/v)with ultrasound.The obtained EHL was then characterized by FTIR,GPC,and 1H NMR and further evaluated as potential antioxidants.The results showed that the yield of EHL was 32.7%and the purity increased from 59.2%to 74.8%by elimination of carbohydrates and protein impurities.The antioxidant activity analysis showed that the IC50 on DPPH radicals scavenging rate and prussian reduction ability changed from 0.348 g/mL and 0.301/(0.3 mg/mL)to 0.193 g/mL and 0.406/(0.3 mg/mL)after purification,respectively,which indicated that carbohydrates and protein impurities had negative effects on the antioxidant activity.The study therefore suggested that purified enzymatic hydrolysis lignin was a potential source of value added antioxidants.

作者: Liang-Liang An Guan-Hua Wang Hongyu Jia Cui-Yun Liu Chuan-Ling Si

作者单位: Tianjin Key Laboratory of Pulp & Paper,Tianjin University of Science & Technology,Tianjin,300457,Chi Tianjin Key Laboratory of Pulp & Paper,Tianjin University of Science & Technology,Tianjin,300457,Chi Department of Agriculture Science and Engineering,Shandong Agriculture and Engineering College,Jinan

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: 1-6

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）