Dieter Rahmadiawan , Hairul Abral , Shih-Chen Shi , Ilham Chayri Iby , Razan Muhammad Railis , Melbi Mahardika , Dian Juliadmi , Fazhar Akbar
{"title":"通过长时间的水浸后处理提高聚乙烯醇/钩藤甘比亚提取物/硼酸生物聚合物薄膜的柔韧性","authors":"Dieter Rahmadiawan , Hairul Abral , Shih-Chen Shi , Ilham Chayri Iby , Razan Muhammad Railis , Melbi Mahardika , Dian Juliadmi , Fazhar Akbar","doi":"10.1016/j.cscee.2025.101272","DOIUrl":null,"url":null,"abstract":"<div><div>Polyvinyl alcohol (PVA) films mixed with boric acid (BA) and <em>Uncaria gambir</em> (UG) offer excellent UV shielding and moisture resistance but suffer from brittleness. This study introduces a water immersion technique to improve flexibility. The untreated film showed high tensile strength (57.7 MPa) and modulus (3.7 GPa) but low elongation (∼43 %) and toughness (20.2 MJ/m<sup>3</sup>). After 7 days of immersion, tensile strength and modulus decreased to 41.2 MPa and 1.94 GPa, while elongation and toughness increased to ∼150 % and 58.1 MJ/m<sup>3</sup>, respectively. This green approach effectively enhances the ductility of PVA-based biopolymer films.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101272"},"PeriodicalIF":0.0000,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancing the flexibility of polyvinyl alcohol/Uncaria gambir extract/boric acid biopolymer films via prolonged water immersion post-treatment\",\"authors\":\"Dieter Rahmadiawan , Hairul Abral , Shih-Chen Shi , Ilham Chayri Iby , Razan Muhammad Railis , Melbi Mahardika , Dian Juliadmi , Fazhar Akbar\",\"doi\":\"10.1016/j.cscee.2025.101272\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Polyvinyl alcohol (PVA) films mixed with boric acid (BA) and <em>Uncaria gambir</em> (UG) offer excellent UV shielding and moisture resistance but suffer from brittleness. This study introduces a water immersion technique to improve flexibility. The untreated film showed high tensile strength (57.7 MPa) and modulus (3.7 GPa) but low elongation (∼43 %) and toughness (20.2 MJ/m<sup>3</sup>). After 7 days of immersion, tensile strength and modulus decreased to 41.2 MPa and 1.94 GPa, while elongation and toughness increased to ∼150 % and 58.1 MJ/m<sup>3</sup>, respectively. This green approach effectively enhances the ductility of PVA-based biopolymer films.</div></div>\",\"PeriodicalId\":34388,\"journal\":{\"name\":\"Case Studies in Chemical and Environmental Engineering\",\"volume\":\"12 \",\"pages\":\"Article 101272\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-08-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Case Studies in Chemical and Environmental Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666016425001793\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Environmental Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Chemical and Environmental Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666016425001793","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Environmental Science","Score":null,"Total":0}
Enhancing the flexibility of polyvinyl alcohol/Uncaria gambir extract/boric acid biopolymer films via prolonged water immersion post-treatment
Polyvinyl alcohol (PVA) films mixed with boric acid (BA) and Uncaria gambir (UG) offer excellent UV shielding and moisture resistance but suffer from brittleness. This study introduces a water immersion technique to improve flexibility. The untreated film showed high tensile strength (57.7 MPa) and modulus (3.7 GPa) but low elongation (∼43 %) and toughness (20.2 MJ/m3). After 7 days of immersion, tensile strength and modulus decreased to 41.2 MPa and 1.94 GPa, while elongation and toughness increased to ∼150 % and 58.1 MJ/m3, respectively. This green approach effectively enhances the ductility of PVA-based biopolymer films.