Fully renewable oxygen barrier films of scCO<sub>2</sub>-processed thermoplastic starch/sugar alcohol blends-Reference-Cited by-同舟云学术

Fully renewable oxygen barrier films of scCO₂-processed thermoplastic starch/sugar alcohol blends

Published:2024-08-05 Issue:8 Volume:44 Page:592-602
ISSN:0334-6447
Container-title:Journal of Polymer Engineering
language:en
Short-container-title:

Author:

Luo Qian-li¹,Wang Zi-yu¹,Ma Ning¹,Xu Hong-juan¹,Huang Ya-qiong²³,Yeh Jen-taut¹

Affiliation:

1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education, Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Faculty of Materials Science and Engineering , Hubei University , Wuhan , China

2. School of Nuclear Technology and Chemistry & Biology, Hubei Key Laboratory of Radiation Chemistry and Functional Materials , Hubei University of Science and Technology , Xianning , Hubei , China

3. Hubei Key Laboratory of Polymer Materials , Hubei University , Wuhan , China

Abstract

Abstract Excellent oxygen barrier films were prepared by blending very small loadings (<1 wt%) of dihydroxyacetone (DHA), erythritol (ET) or xylitol (XT) in thermoplastic starch (TPS), and/or processing with supercritical carbon dioxide (scCO2) assistance. The minimum oxygen transmission rates (OTR) and all free-volume-hole characteristic (FVH) values of each scCO2-processed TPS/sugar alcohol film series are somewhat smaller than those of corresponding TPS/sugar alcohol film series without scCO2-assistance, and decrease with the decrease in sugar alcohol’s molecular weight. The minimum OTR values acquired for scCO2-processed TPS/DHA and TPS/ET blown films are only 3.6 and 4.3 cm3/m2·day·atm, respectively, which meet the demand of high oxygen barrier films having OTR ≦5 cm3/m2·day·atm. The longitudinal or transversal tensile strengths acquired for each scCO2-processed TPS/sugar alcohol series films are ∼30 % to ∼40 % higher than those of the TPS blown films. Dynamic mechanical relaxations of each TPS/sugar alcohol or scCO2-processed TPS/sugar alcohol film series reveal that the sugar alcohols are compatible with TPS, as their sugar alcohol contents are ≤ the corresponding compatibility values. The decreased OTR and FVH values acquired for TPS/sugar alcohol or scCO2-processed TPS/sugar alcohol films are most likely due to them being scCO2-processed or incorporated with smaller molecular weight of sugar alcohols.

Publisher

Walter de Gruyter GmbH

Link

https://www.degruyter.com/document/doi/10.1515/polyeng-2024-0080/pdf

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