TEMPO氧化体系协同超声波法纤维素纳米纤丝的制备及表征  

Preparation and Characterization of Cellulose Nanofibrils by TEMPO Oxidation System Combined with Ultrasonication

作　　者：徐春霞[1] 降帅 韩阜益[1] 徐芳 刘丽芳[1] XU Chun-xia;JIANG Shuai;HAN Fu-yi;XU Fang;LIU Li-fang(College of Textiles,Donghua University,Shanghai 201620)

机构地区：[1]东华大学纺织学院,上海201620

出　　处：《纺织科学与工程学报》2018年第4期102-107,共6页Journal of Textile Science & Engineering

基　　金：中央高校基本科研业务费专项资金(2232018A3-04)

摘　　要：以水稻秸秆为原料,采用化学处理制得纯化纤维素,再经TEMPO氧化体系协同超声波处理获得纤维素纳米纤丝(CNFs),研究超声波处理时间对CNFs悬浮液稳定性的影响,并对产物的结构和性能进行表征。结果表明,化学处理可有效脱去水稻秸秆中的木质素、半纤维等;以450 W功率对TEMPO氧化纤维素超声处理30 min,可制得稳定性较好、平均直径为16. 11 nm的丝状CNFs;其内部晶体结构仍保持纤维素I型,结晶度为52. 63%,最大热解峰值为330℃。Pure cellulose was isolated from raw rice straw by chemical treatment.TEMPO oxidization system with ultrasonic mechanical treatment was applied to the resultant cellulose to obtain cellulose nanofibrils(CNFs).The effect of ultrasonication treatment time on the stability of cellulose nanofibrils(CNFs)suspension was discussed.The structure and properties of the products were characterized.The results showed that chemical treatment could remove the lignin and hemicellulose from raw rice straw effectively.TEMPO oxidized cellulose was ultrasonically treated 30min at 450W and the filamentous CNFs with good stability and average diameter of 16.11 nm were made.The inner crystal structure of CNFs retained celluloseⅠstructure with superior crystallinities of 52.63%,and its maximum pyrolysis peak was 330℃.

关 键 词：纤维素纳米纤丝 水稻秸秆 TEMPO氧化体系 超声波法 

分 类 号：TS102.2[轻工技术与工程—纺织工程]