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...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-12-01
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| Series: | Case Studies in Chemical and Environmental Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666016425001793 |
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| Summary: | 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. |
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| ISSN: | 2666-0164 |