期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 94, 期 -, 页码 736-745出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2016.09.059
关键词
Cellulose nanofibrils (CNFs); Formic acid hydrolysis; High-pressure homogenization; Sustainable process
资金
- National Natural Science foundation of China [21306216, 31170541, 31470609, 21506240]
- Natural Science Foundation of Tianjin City [13JCZDJC29400]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar (China) [JQ201305]
This article described a sustainable route, which combined relatively mild formic acid (FA) hydrolysis pretreatment of bleached softwood pulp with high-pressure homogenization, to prepare cellulose nanofibrils (E-CNFs). Results showed that the prepared F-CNFs had high thermal stability (e.g. the onset decomposition temperature was over 290 degrees C). Also, it was found that the prepared F-CNFs were more homogeneous and the length of the F-CNFs became shorter with the increase of hydrolysis time in FA hydrolysis, and a maximum crystallinity index of about 52.9% could be achieved when the hydrolysis time was 6 h. Compared to H-CNFs (prepared by HCl pretreatment), F-CNFs showed better dispersibility in DMSO, IMF and DMAC respectively because of the introduction of ester groups on the surface of F-CNFs. This high compatibility leads to that the F-CNFs may have great potential in reinforcing polymeric matrix materials. In addition, FA could be easily recovered. Thus, FA hydrolysis pretreatment plus high-pressure homogenization could be a sustainable and economically feasible process for the production of CNFs. (C) 2016 Elsevier B.V. All rights reserved.
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