MODIFICATION AND APPLICATION OF HEMICELLULOSE SEPARATED FROM WASTE LIQUOR OF PRC-APMP
The hemicelluloses, separated from PRC-APMP pulping waste liquor, were modified through etherifying reaction to get cationic quaternary ammonium type hemicelluloses with different degrees of substitution (DS). Some key factors to the modification were determined, including the dosages of etherifying agent and catalyst, reaction temperature and time, etc. The results showed that cationic hemicellulose with a relatively high DS of 0.083 could be obtained when the optimum conditions were as follows: mass ratios for cationic etherifying agent to hemicellulose and catalyst to hemicellulose were 1.0 and 0.06, respectively; the reaction temperature was 65 oC and the reaction time was 4hr. The cationic hemicellulose obtained was further used to improve the strength properties of hardwood kraft pulp, softwood kraft pulp and OCC, and they can be improved significantly.
PRC-APMP waste liquor hemicellulose modification strength properties
Zhang Jiying Hu Huiren
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science & Technology, Tianjin, 300457,China
国际会议
广州
英文
1151-1154
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）