PREPARATION OF CATIONIC NANOFIBRILLATED CELLULOSE BY COMBINED PRETREATMENT OF MECHANICAL REFINING AND CELLULASE HYDROLYSIS
Nanofibrillated cellulose(NFC)can be disintegrated from various plant fibers,but the mechanical separation of plant fibers into single nanofiber was typically required high energy input.In order to adjust the interfacial properties of NFC,and reduce chemical consumption and energy input during the NFC preparation,several pretreatments have been used.In this study,the combined pretreatment of mechanical refining and cellulase hydrolysis,followed by modification of the obtained NFC with N-(2-3-epoxypropyl)trimethylammonium chloride(EPTMAC),was employed to produce the cationic NFC.The results showed that utilized of cellulase hydrolysis following mechanical refining favorably facilitated the NFC preparation,which resulted in decreased EPTMAC dosage and improved efficiency of the modification.Compared to mechanical(without cellulase treatment),reactivity of the pulp fibers increased from 40%to 70%which prehydrolysis by 8 u/g(based on dry pulp)cellulase combined with mechanical refining.Correspondingly,the consumption of EPTMAC in cationic modification on fibers was decreased by 50%.It is concluded that cellulase hydrolysis combined with mechanical refining pretreatment before EPTMAC modification,can be a promising approach for manufacturing the cationic cellulose nanofiber.
Yangbing Wen Dong Cheng Xingye An Yonghao Ni
Tianjin Key Laboratory of Pulp and Paper,Tianjin University of Science & Technology,Tianjin 300457,C Tianjin Key Laboratory of Pulp and Paper,Tianjin University of Science & Technology,Tianjin 300457,C
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-4
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）