This paper reports an improved traditional fiber degumming method, where sisal fibers were treated by alkali oxygen and pectinase, respectively, after the solute alkali pretreatment. To explore the influence of various factors on its degumming, efficiency of degumming through single factor and orthogonal experiments was aasessed. The results showed that pectinase/alkali-oxygen method after the first alkali treatment had a good effect on the degumming of sisal fiber, and most of the non-cellulose components such as hemicellulose, lignin and pectin had been removed. After pectinase treatment, the cellulose content and crystallinity were 71.87% and 66.29%, respectively. After alkaline oxygen treatment, the cellulose content was 77.16%, and the crystallinity was 69.09%. In terms of degumming rate, alkali oxygen treatment worked better than pectinase treatment, the degumming rate of pectinase method was about 10%, while that of alkali-oxygen method was more than 20%. In other hand, the pectinase method was much milder and had less damage to fibers. It would provide some references for the future application and development of sisal fiber.

本文报道了一种改进的传统纤维脱胶方法，剑麻纤维在溶质碱预处理后分别用碱氧和果胶酶处理。为探讨各种因素对其脱胶的影响，通过单因素和正交试验对脱胶效率进行了评估。结果表明，第一次碱处理后的果胶酶/碱氧法对剑麻纤维的脱胶效果良好，且大部分非纤维素成分如半纤维素、木质素和果胶已被去除。经果胶酶处理后，纤维素含量和结晶度分别为71.87%和66.29%。碱氧处理后纤维素含量为77.16%，结晶度为69.09%。在脱胶率方面，碱氧处理效果优于果胶酶处理，果胶酶法脱胶率在10%左右，碱氧法脱胶率在20%以上。另一方面，果胶酶方法要温和得多，对纤维的损伤较小。为今后剑麻纤维的应用和发展提供一定的参考。