{"title":"用 scCO2 加工的热塑性淀粉/糖醇混合物制成的完全可再生氧气阻隔膜","authors":"Qian-li Luo, Zi-yu Wang, Ning Ma, Hong-juan Xu, Ya-qiong Huang, Jen-taut Yeh","doi":"10.1515/polyeng-2024-0080","DOIUrl":null,"url":null,"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 (scCO<jats:sub>2</jats:sub>) assistance. The minimum oxygen transmission rates (OTR) and all free-volume-hole characteristic (FVH) values of each scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol film series are somewhat smaller than those of corresponding TPS/sugar alcohol film series without scCO<jats:sub>2</jats:sub>-assistance, and decrease with the decrease in sugar alcohol’s molecular weight. The minimum OTR values acquired for scCO<jats:sub>2</jats:sub>-processed TPS/DHA and TPS/ET blown films are only 3.6 and 4.3 cm<jats:sup>3</jats:sup>/m<jats:sup>2</jats:sup>·day·atm, respectively, which meet the demand of high oxygen barrier films having OTR ≦5 cm<jats:sup>3</jats:sup>/m<jats:sup>2</jats:sup>·day·atm. The longitudinal or transversal tensile strengths acquired for each scCO<jats:sub>2</jats:sub>-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 scCO<jats:sub>2</jats:sub>-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 scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol films are most likely due to them being scCO<jats:sub>2</jats:sub>-processed or incorporated with smaller molecular weight of sugar alcohols.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fully renewable oxygen barrier films of scCO2-processed thermoplastic starch/sugar alcohol blends\",\"authors\":\"Qian-li Luo, Zi-yu Wang, Ning Ma, Hong-juan Xu, Ya-qiong Huang, Jen-taut Yeh\",\"doi\":\"10.1515/polyeng-2024-0080\",\"DOIUrl\":null,\"url\":null,\"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 (scCO<jats:sub>2</jats:sub>) assistance. The minimum oxygen transmission rates (OTR) and all free-volume-hole characteristic (FVH) values of each scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol film series are somewhat smaller than those of corresponding TPS/sugar alcohol film series without scCO<jats:sub>2</jats:sub>-assistance, and decrease with the decrease in sugar alcohol’s molecular weight. The minimum OTR values acquired for scCO<jats:sub>2</jats:sub>-processed TPS/DHA and TPS/ET blown films are only 3.6 and 4.3 cm<jats:sup>3</jats:sup>/m<jats:sup>2</jats:sup>·day·atm, respectively, which meet the demand of high oxygen barrier films having OTR ≦5 cm<jats:sup>3</jats:sup>/m<jats:sup>2</jats:sup>·day·atm. The longitudinal or transversal tensile strengths acquired for each scCO<jats:sub>2</jats:sub>-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 scCO<jats:sub>2</jats:sub>-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 scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol films are most likely due to them being scCO<jats:sub>2</jats:sub>-processed or incorporated with smaller molecular weight of sugar alcohols.\",\"PeriodicalId\":16881,\"journal\":{\"name\":\"Journal of Polymer Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2024-08-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Polymer Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1515/polyeng-2024-0080\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Polymer Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1515/polyeng-2024-0080","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Fully renewable oxygen barrier films of scCO2-processed thermoplastic starch/sugar alcohol blends
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.
期刊介绍：
Journal of Polymer Engineering publishes reviews, original basic and applied research contributions as well as recent technological developments in polymer engineering. Polymer engineering is a strongly interdisciplinary field and papers published by the journal may span areas such as polymer physics, polymer processing and engineering of polymer-based materials and their applications. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes.
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