Efficiently Extracted Cellulose Nanocrystals and Starch Nanoparticles and Techno-Functional Properties of Films Made Thereof
Version
Published
Date Issued
2018
Author(s)
Type
Article
Language
English
Abstract
Cellulose nanocrystals (CNC) and starch nanoparticles (SNP) have remarkable physical and mechanical characteristics. These properties particularly facilitate their application as high-performance components of bio-based packaging films as alternatives to fossil-based counterparts. This study demonstrates a time-efficient and resource-saving extraction process of CNC and SNP by sulfuric acid hydrolysis and neutralization. The yields of the hydrolyzed products were 41.4% (CNC) and 32.2% (SNP) after hydrolysis times of 3 h and 120 h, respectively. The nanoparticle dispersions were wet-coated onto poly(lactic acid) (PLA) and paper substrates and were incorporated into starch films. No purification or functionalization of the nanoparticles was performed prior to their application. Techno-functional properties such as the permeability of oxygen and water vapor were determined. The oxygen permeability of 5–9 cm3 (STP) 100 µm m−2 d−1 bar−1 at 50% relative humidity and 23 °C on PLA makes the coatings suitable as oxygen barriers. The method used for the extraction of CNC and SNP contributes to the economic production of these nanomaterials. Further improvements, e.g., lower ion concentration and narrower particle size distribution, to achieve reproducible techno-functional properties are tangible.
Subjects
QC Physics
QD Chemistry
TJ Mechanical engineering and machinery
TP Chemical technology
Publisher DOI
Journal
Coatings
ISSN
2079-6412
Volume
8
Issue
4
Publisher
MDPI
Submitter
SanahujaS
Citation apa
Metzger, C., Sanahuja, S., Behrends, L., Sängerlaub, S., Lindner, M., & Briesen, H. (2018). Efficiently Extracted Cellulose Nanocrystals and Starch Nanoparticles and Techno-Functional Properties of Films Made Thereof. In Coatings (Vol. 8, Issue 4). MDPI. https://doi.org/10.24451/arbor.8700
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Metzger_Sanahuja_2018_NCC starch nanocrystalls film coating.pdf
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Attribution 4.0 International
Version
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19.18 MB
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Adobe PDF
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