Linze Liu, Yang Yang, Tungalag Dong, Lijun Song, Xueyan Yun
{"title":"用于食品包装的具有高二氧化碳/氧气选择透过性的聚乳酸基微孔膜的制备与表征","authors":"Linze Liu, Yang Yang, Tungalag Dong, Lijun Song, Xueyan Yun","doi":"10.1134/s0965545x23600424","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>To maintain CO<sub>2</sub>/O<sub>2</sub> permselectivity of poly(lactic acid) (PLLA) microporous films for better preservation of fresh produce, Polytrifluoropropylmethylsiloxane (PTFPMS) was introduced into PLLA to prepare PLLA-PTFPMS-PLLA (PLTL) block copolymer. And PLTL-<i>n</i>% microporous films were prepared using varying ratios of chloroform/acetone blended solvents as the film-casting solution in this study. PTFPMS filled a portion of the micropores of the PLTL-<i>n</i>% film. While the micropores enhanced the O<sub>2</sub> and CO<sub>2</sub> dioxide permeability of the PLLA microporous film, PTFPMS maintained the CO<sub>2</sub>/O<sub>2</sub> selective permeability of the film. In comparison to PLLA films, the CO<sub>2</sub> permeability of mixed solvents-treated PLTL-20% film increased from 1.99 × 10<sup>–8</sup> to 10.08 × 10<sup>–8</sup> cm<sup>3</sup> m/m<sup>2</sup> h Pa, O<sub>2</sub> permeability increased from 0.70 × 10<sup>–8</sup> to 2.02 × 10<sup>–8</sup> cm<sup>3</sup> m/m<sup>2</sup> h Pa, and CO<sub>2</sub>/O<sub>2</sub> permselectivity increased from 2.9 to 5.0 at 5°C. In addition, PLTL-<i>n</i>% microporous films also have good flexibility and UV shielding properties.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation and Characterization of PLLA-Based Microporous Membranes with High CO2/O2 Selective Permeability for Food Packaging\",\"authors\":\"Linze Liu, Yang Yang, Tungalag Dong, Lijun Song, Xueyan Yun\",\"doi\":\"10.1134/s0965545x23600424\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Abstract</h3><p>To maintain CO<sub>2</sub>/O<sub>2</sub> permselectivity of poly(lactic acid) (PLLA) microporous films for better preservation of fresh produce, Polytrifluoropropylmethylsiloxane (PTFPMS) was introduced into PLLA to prepare PLLA-PTFPMS-PLLA (PLTL) block copolymer. And PLTL-<i>n</i>% microporous films were prepared using varying ratios of chloroform/acetone blended solvents as the film-casting solution in this study. PTFPMS filled a portion of the micropores of the PLTL-<i>n</i>% film. While the micropores enhanced the O<sub>2</sub> and CO<sub>2</sub> dioxide permeability of the PLLA microporous film, PTFPMS maintained the CO<sub>2</sub>/O<sub>2</sub> selective permeability of the film. In comparison to PLLA films, the CO<sub>2</sub> permeability of mixed solvents-treated PLTL-20% film increased from 1.99 × 10<sup>–8</sup> to 10.08 × 10<sup>–8</sup> cm<sup>3</sup> m/m<sup>2</sup> h Pa, O<sub>2</sub> permeability increased from 0.70 × 10<sup>–8</sup> to 2.02 × 10<sup>–8</sup> cm<sup>3</sup> m/m<sup>2</sup> h Pa, and CO<sub>2</sub>/O<sub>2</sub> permselectivity increased from 2.9 to 5.0 at 5°C. In addition, PLTL-<i>n</i>% microporous films also have good flexibility and UV shielding properties.</p>\",\"PeriodicalId\":738,\"journal\":{\"name\":\"Polymer Science, Series A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2024-07-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Science, Series A\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://doi.org/10.1134/s0965545x23600424\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Science, Series A","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1134/s0965545x23600424","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Preparation and Characterization of PLLA-Based Microporous Membranes with High CO2/O2 Selective Permeability for Food Packaging
Abstract
To maintain CO2/O2 permselectivity of poly(lactic acid) (PLLA) microporous films for better preservation of fresh produce, Polytrifluoropropylmethylsiloxane (PTFPMS) was introduced into PLLA to prepare PLLA-PTFPMS-PLLA (PLTL) block copolymer. And PLTL-n% microporous films were prepared using varying ratios of chloroform/acetone blended solvents as the film-casting solution in this study. PTFPMS filled a portion of the micropores of the PLTL-n% film. While the micropores enhanced the O2 and CO2 dioxide permeability of the PLLA microporous film, PTFPMS maintained the CO2/O2 selective permeability of the film. In comparison to PLLA films, the CO2 permeability of mixed solvents-treated PLTL-20% film increased from 1.99 × 10–8 to 10.08 × 10–8 cm3 m/m2 h Pa, O2 permeability increased from 0.70 × 10–8 to 2.02 × 10–8 cm3 m/m2 h Pa, and CO2/O2 permselectivity increased from 2.9 to 5.0 at 5°C. In addition, PLTL-n% microporous films also have good flexibility and UV shielding properties.
期刊介绍：
Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.
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