Cleaner production of lignocellulosic nanofibrils: Potential of mixed enzymatic treatment

JOURNAL OF CLEANER PRODUCTION

卷:270

Article

Bian, Huiyang^1,2  Chen, Lidong²  Dong, Maolin²  Fu, Yanqiao²  Wang, Ruibin^1,2  Zhou, Xuelian^1,2  Wang, Xiu^1,2  Xu, Junhua¹  Dai, Hongqi^1,2 

[1] Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Peoples R China

[2] Nanjing Forestry Univ, Coll Light Ind & Food Engn, Nanjing 210037, Peoples R China

关键词: Cleaner production;    Lignocellulosic nanofibrils;    Mixed enzymatic treatment;    Film;    Physicochemical property;   

DOI  :  10.1016/j.jclepro.2020.122506

来源: Elsevier

【 摘 要 】

Lignocellulosic nanofibrils (LCNF) production ordinarily requires vigorous chemical reactions and intensive mechanical fibrillation, causing potential environmental pollution. To overcome this issue, economic and green mixed enzymatic treatments were employed to prepare LCNF from unbleached pulp in this work. In contrast to mixed enzymatic post-treatment, pretreatment seems to be a better alternative for cellulose nanofibrillation, endowing LCNF with decreased average height (15.0 nm), higher shear storage modulus (387.3 Pa), and increased thermal stability with the maximal weight loss temperature (T-max) of 352 degrees C. The resultant LCNF was directly used to fabricate films without any chemical modification. It was found that the diameter of LCNF played key roles in affecting the surface morphology of film, for example, films made from fibrils with smaller diameter had smoother surface. Moreover, the tensile stress and Young's modulus of the resulting LCNF film prepared from pretreated fibrils were about 138% and 20% higher than those from post-treated fibrils. Overall, using mixed enzymes in addition to mechanical fibrillation, especially enzymatic pretreatment, is an environment-friendly method to prepare LCNF and films, which provides useful knowledge for low-cost and clean production and facilitates the commercialization and application of nanomaterials. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

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