文献类型：期刊文献

英文题名：Length-controlled cellulose nanofibrils produced using enzyme pretreatment and grinding

作者：Chen, Yuan[1] Fan, Dongbin[1] Han, Yanming[1] Li, Gaiyun[1] Wang, Siqun[2]

第一作者：陈媛

通信作者：Li, GY[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA

年份：2017

卷号：24

期号：12

起止页码：5431-5442

外文期刊名：CELLULOSE

收录：;EI(收录号：20173904204090);Scopus(收录号：2-s2.0-85029707264);WOS:【SCI-EXPANDED(收录号:WOS:000415283400012)】；

基金：This work was supported by the Special Fund for Forest Scientific Research in the Public Welfare (201504603).

语种：英文

外文关键词：Cellulose nanofibrils; Length-controlled; Enzyme; Grinding; Nanofilms

摘要：The length of cellulose nanofibrils (CNFs) is a significant parameter for various applications. The goal of this research was to employ a fabrication method to produce length-controlled CNFs; the chosen technique was enzy-grinding (enzyme pretreatment followed by mechanical grinding). Here, we presented the results of the optimization of the diameter and length, the characterization of the properties of CNFs and nanofilms prepared using these fibrils. The cellulose morphology, crystallinity index (CrI), chemical structure, and thermal stability were investigated as functions of the enzyme loading and hydrolysis time. The results showed that enzy-grinding could effectively reduce the diameter and length of cellulose fibrils. The average diameter was about 8.6 +/- 3.6 nm, and the length could be controlled over the range from 0.76 +/- 0.38 mu m to 4 mu m (i.e. aspect ratios from 43 to 328). After the grinding process, the CNFs maintained high thermal stability and no change in the chemical structure compared to the original pulp. The transmittance and mechanical properties of the CNF films were strongly dependent on the fibril length. The fabrication of length-controlled CNFs using the enzy-grinding process is meaningful and significant research which could be relevant to the optimization of such materials for various applications.