稀硫酸预处理对棉纤维素聚合度的影响  

Influence of Dilute Sulphuric Acid Treatment on Cotton Cellulose Polymerization degree

作　　者：段思雨 胡红梅[1] 俞建勇[1] 李乃强 王学利[1] DUAN Siyu;HU Hongmei;YU Jianyong;LI Naiqiang;WANG Xueli(Donghua University,Shanghai,201620,China)

机构地区：[1]东华大学,上海201620

出　　处：《棉纺织技术》2021年第1期44-47,共4页Cotton Textile Technology

基　　金：国家重点研发计划资助项目(2016YFB0302900)。

摘　　要：探讨稀硫酸预处理对棉纤维素聚合度和结晶结构的影响。结合广角X射线衍射仪和红外光谱仪的高斯函数分峰拟合法,研究了酸预处理后棉纤维素的晶型和氢键模式的变化。结果表明:稀硫酸预处理60 min后,棉纤维素聚合度由1621降低到431,结晶度由80.35%增加到83.28%,棉纤维素在NMMO溶液中的溶解度从2%提高到7%。认为:稀硫酸预处理可以明显降低棉纤维素的聚合度,进而提升其溶解度。The influences of dilute sulphuric acid treatment on the polymerization degree and crystalline structure of cotton cellulose were discussed.Combining the gaussian function fractional peak fitting method of wide angle X-ray diffractometer and infrared spectrometer,the changes of crystal form and hydrogen bond modal for cotton cellulose after acid pre-treatment were studied.The test results showed that the polymerization degree of cotton cellulose was decreased from 1621 to 431,the crystallinity degree was increased from 80.35%to 83.28%after 60 min dilute sulphuric acid treatment.The solubility of cotton cellulose in NMMO solution was increased from 2%to 7%.It is considered that the polymerization degree can be obviously decreased with dilute sulphuric acid treatment then the solubility can be improved.

关 键 词：棉纤维素 酸处理 聚合度 氢键 结晶度 溶解度 

分 类 号：TS102.1[轻工技术与工程—纺织工程]