中华纸业
中華紙業
중화지업
CHINA PULP & PAPER INDUSTRY
2013年
6期
52-55
,共4页
尾巨桉%FT-IR%聚合度%组分分析
尾巨桉%FT-IR%聚閤度%組分分析
미거안%FT-IR%취합도%조분분석
Eucalyptus urograndis%FT-IR%DP%components analysis
对尾巨桉进行不同程度脱木素处理,然后对不同木素含量的尾巨桉进行组分、聚合度和FT-IR分析,研究木素去除程度和纤维素降解之间的关系以及处理过程中纤维内各组分化学结构的变化.结果表明:纤维素聚合度随木素含量的减少不断降低,在处理2~3h时间内,木素含量下降最快,纤维素降解也最为严重;脱木素过程中糖类大分子结构逐步裸露出来,并出现了较多的游离羟基、糖醛酸小分子和COO-末端基.
對尾巨桉進行不同程度脫木素處理,然後對不同木素含量的尾巨桉進行組分、聚閤度和FT-IR分析,研究木素去除程度和纖維素降解之間的關繫以及處理過程中纖維內各組分化學結構的變化.結果錶明:纖維素聚閤度隨木素含量的減少不斷降低,在處理2~3h時間內,木素含量下降最快,纖維素降解也最為嚴重;脫木素過程中糖類大分子結構逐步裸露齣來,併齣現瞭較多的遊離羥基、糖醛痠小分子和COO-末耑基.
대미거안진행불동정도탈목소처리,연후대불동목소함량적미거안진행조분、취합도화FT-IR분석,연구목소거제정도화섬유소강해지간적관계이급처리과정중섬유내각조분화학결구적변화.결과표명:섬유소취합도수목소함량적감소불단강저,재처리2~3h시간내,목소함량하강최쾌,섬유소강해야최위엄중;탈목소과정중당류대분자결구축보라로출래,병출현료교다적유리간기、당철산소분자화COO-말단기.
In this paper, Eucalyptus urograndis fibers were treated with delignification in different extent, then the chemical structure components of Eucalyptus urograndis fibers contained different lignin content were analyzed, DP of cellulose were researched, and results were characterized by FT-IR, in order to find out the relationship between the delignification extent and cellulose degradation and the rule of its structure changes during delignification process. The results show that DP of cellulose reduced along with reduction of lignin, and the fastest rate of delignification and`the maximum degradation happened in the process within 2~3 h. According to the FT-IR, carbohydrate structure gradually exposed and more hydroxyl group, uronic acids and COO- end group emerged in the whole process.
