Journal
CARBOHYDRATE POLYMERS
Volume 174, Issue -, Pages 923-932Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.07.019
Keywords
Cellulose nanocrystals; Poly(lactic acid); Maleic anhydride; Solution blow spinning; Nanocomposites; Nanofibers
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Funding
- CNPq [303796/2014-6]
- Embrapa Rede Agronano
- WRRC/ARS/USDA
- CAPES
- CNPq [Science without Borders] [202445/2014-3]
- CNPq [MCTI/SISNANO] [402287/2013-4]
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Cellulose nanocrystals (CNCs) were extracted from Eucalyptus kraft pulp by sulfuric acid hydrolysis, and esterified with maleic anhydride (CNCMA). The incorporation of sulfate ester groups on the cellulose surface resulted in higher stability of the nanoparticles in aqueous suspensions and lower thermal stability. Then, PLA/CNC and PLA/CNCMA nanocomposites were successfully obtained by solution blow spinning (SBS) using dimethyl carbonate (DMC) as solvent. CNC and CNCMA indicated to be acting both as nucleating agents or growth inhibitors of PLA crystal and tends to favor the formation of PLA crystals of higher stability. A fraction of the nanocrystals indicate to be exposed on the surface of the PLA fibers, since the hydrophilicity of the composite films increased significantly. Such composites may have potential application as filtering membranes or adsorbents. (C) 2017 Elsevier Ltd. All rights reserved.
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