| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Fed Univ ABC UFABC, Engn Modeling & Appl Social Sci Ctr CECS, Environm Friendly Polymers Lab, Av Estados 5001, BR-09210180 Santo Andre, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | JOURNAL OF CLEANER PRODUCTION; v. 211, p. 408-416, FEB 20 2019. |
| Web of Science Citations: | 7 |
| Abstract | |
Currently, cellulose nanostructures (CNS) are obtained using pretreatments of lignocellulosic residues. In this work, different conditions in the enzymatic isolation process were studied to obtain CNS, aiming an alternative eco-friendly method. Two isolation methodologies were used: a) one submitting the residue to an alkaline pretreatment and b) other using the lignocellulosic waste directly without pretreatment. A commercial complex of enzymes (Ctec (R)) was used, varying the time to which the substrate was exposed to the enzymes at 12, 24 and 48 \&\#x202F;h, searching for the better condition to CNS obtaining. The application of alkaline pretreatment removed 73% of hemicellulose and 50% of lignin from wood fiber leading to a more exposed cellulose structure and increased the amount of nanocellulose produced. The obtained nanostructures were needle-shaped of approximately 70 \&\#x202F;nm wide. However, CNS of similar size and shape were received as well without pretreatment application, allowing their obtainment with lower reagent consumption through a more environmentally efficient route, as presented in the life cycle impact assessment (LCIA) where energy consumption and acidification potential were considered. (C) 2018 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 16/12700-5 - Cellulose nanostructures incorporation to poly(butylene adipate co-terephthalate) (PBAT) using surfactants |
| Grantee: | Clara Rodrigues Bauli |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |