Study on the substitution of p-hydroxybenzoic acid-carboxymethyl hemicelluloses prepared using hemicelluloses from the APMP waste liquor

摘要：

　　In the pulp and paper industry,most of the hemicelluloses run off in the alkaline peroxidemechanical pulp(APMP)waste liquor.Sugar hasanti-cancer effects,the hemicellulose after partial hydrolysis can achieve the same effect,and can also be prepared as non-toxic anti-cancer substances after further carboxymethylation.Hemicellulose from Eucalyptus APMP pulping waste liquor extraction was used as raw material,then was made as carboxymethyl modified hemicellulose(referred to as CMMH)through carboxymethyl reaction preparation,and then became a kind of new preservatives,p-hydroxybenzoic acid-carboxymethyl modified hemicelluloses ester(referred to as P-CMMH),through hydroxyl acid esterification reaction with PHBA(p-hydroxybenzoic acid).The properties of raw materials and the products were studied.The average degree of substitution(0.004826)raised by 50%when the amount of the PHBA changed from 5:1(hydroxybenzoic acid:xylose,mole ratio)to10:1 in the solution of monochloroacetic acid and sodium hydroxide.The infrared spectroscopy results of P-CMMH showed that characteristic absorption peak of aromatic esters appears at 1605~1585cm-1 zone,it means that a substituted ester bond has been successful introduced in the esterification reaction between carboxymethyl modified hemicelluloses andp-hydroxybenzoic acid.

关键词： carboxymethyl hemicelluloses FI-IR substitution

作者: Haitang Liu Zhong Liu Qifan Jiang Xinyue Zhang

作者单位: Tianjin Key Lab of Pulp & Paper,Tianjin University of Science & Technology,Tianjin 300457,China;Stat Tianjin Key Lab of Pulp & Paper,Tianjin University of Science & Technology,Tianjin 300457,China

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）