热水预水解过程杨木及水解液中组分的变化  

Changes of Components in Poplar and Its Hydrolyzate during Hot Water Pre-hydrolysis

作　　者：袁素娟[1] 吉兴香[1] 田中建[1] 马浩[1] 陈嘉川[1] 杨桂花[1] YUAN Su-juan;JI Xing-xiang;TIAN Zhong-jian;MA Hao;CHEN Jia-chuan;YANG Gui-hua(State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp&Paper Science and Technology of Education Ministry of China,Qilu University of Technology(Shandong Academy of Sciences),Ji nan,Shangdong Province,250353)

机构地区：[1]齐鲁工业大学(山东省科学院)生物基材料与绿色造纸省部共建国家重点实验室/制浆造纸科学与技术教育部重点实验室,山东济南250353

出　　处：《中国造纸》2018年第9期17-22,共6页China Pulp & Paper

基　　金：国家重点研发计划(2017YFB0307900);国家自然科学基金资助项目(31670590;31670595)

摘　　要：探究了热水预水解对杨木组分、微观结构的影响及预水解液中降解产物含量变化的规律。结果表明,在保温时间60 min、保温温度155~175℃以及在保温时间0~120 min、保温温度170℃的条件下,随保温温度的升高或时间的延长,杨木热水预水解后的得率、聚戊糖和Klason木素的相对含量整体减少,纤维素的相对含量和结晶度有所增加;杨木热水预水解后的纤维形貌发生变化,出现不规则碎片和孔洞;预水解液中的酸溶木素含量增加,甲酸、乙酸、糠醛和5-羟甲基糠醛的浓度增加,糖含量随保温温度的升高不断增加,但随保温时间的延长呈先增加后减少的趋势。The effect of hot water pre-hydrolysis on the composition and microstructure of poplar wood and its relationship with the contents of degradation products in hydrolyzate were investigated.Experiments showed that pre-hydrolysisat a temperature of 155～175℃for 60 min and at 170℃for 0～120 min,the yield of poplar wood chips after hydrolysis,the relative content of pentosan and Klason lignin in hydrolysate decreased as a whole,and the relative content and crystallinity of cellulose increased with the increase of temperature or the prolongation of time.Hydrolyzed fiber morphology was changed,appearing irregular fragments and holes.The content of acid-soluble lignin in the hydrolyzate increased,the concentration of formic acid,acetic acid,furfural and 5-hydroxymethylfurfural(5-hmf)increased.The content of sugar increased with the increase of temperature,but it increased first and then decreased with the increase of the time keeping at the maximum temperature.

关 键 词：杨木 热水预水解 组分变化 水解产物 

分 类 号：TS713[轻工技术与工程—制浆造纸工程]