Journal article
Developing chitin nanocrystals for flexible packaging coatings
Carbohydrate polymers, Vol.226, p.115276
12/15/2019
Handle:
https://hdl.handle.net/2376/121995
PMID: 31582071
Abstract
•Formation of stable water-based acrylic resin/TEMPO-oxidized chitin nanocrystals (TOCNs) coating formulations.•The potential use of TOCNs as a rheological modifier in water-based coating formulations.•Fabrication of multilayered BOPP/TOCN laminates with oxygen-barrier function.•Addressing issues of the high sensitivity of TOCNs to moisture and the poor wettability to the hydrophobic surface.•Unreduced optical transparency when chitin nanocrystals were applied as a coating on flexible packaging.
This study assessed the applicability of chitin nanocrystals employed in combination with an existing coating material intended for flexible packaging. The 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) oxidized chitin nanocrystals (TOCNs) were applied 1) as an additive in a water-based acrylic resin (WBAR) that was then coated onto the surface of a biaxially oriented polypropylene (BOPP) film, and 2) as a neat layer in multilayered BOPP laminates bonded by a WBAR adhesive layer. The results indicated that the flow behavior and shear viscosity of the TOCN/WBAR system were dependent on TOCN contents. The TOCNs as a dispersed phase in the acrylic resin matrix did not improve the oxygen barrier property of the resulting coated BOPP. By contrast, the neat continuous TOCN coating layer improved the oxygen barrier property of the laminates of BOPP and TOCNs bonded by the acrylic resin, a 44% oxygen transmission rate reduction for a laminate with a 8.33-μm TOCN layer compared to the laminate without a TOCN layer. The inclusion of the TOCNs maintained the optical transparency of the resulting films.
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Details
- Title
- Developing chitin nanocrystals for flexible packaging coatings
- Creators
- Tuhua Zhong - Washington State UniversityMichael P Wolcott - Washington State UniversityHang Liu - Washington State UniversityJinwu Wang - Washington State University
- Publication Details
- Carbohydrate polymers, Vol.226, p.115276
- Academic Unit
- Apparel, Merchandising, Design and Textiles, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900619654401842
- Language
- English
- Resource Type
- Journal article