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<p>Laminate films were fabricated, consisting of three layers: two outer layers composed of polylactic acid (PLA), and the central layer constituted a polyvinyl alcohol (PVA)/microfibrillated cellulose (MFC) composite film. The MFC underwent two modifications: propionylation (P-MFC) and silanization with dimethyloctadecyl[3-(trimethoxysilyl)propyl] ammonium chloride (AS-MFC). The P-MFC increased the tensile modulus of the laminate film by 58%, while AS-MFC enhanced tensile strength by up to 88%. Notably, among all laminate films, the P-MFC film exhibited the highest thermal stability attributed to its larger crystallite size. Viscoelastic analysis revealed that the damping factor of the P-MFC film was the lowest, signifying the least dissipated energy. Consequently, this laminate film exhibited the most improvement in compatibility between layers. The confirmation of compatibility among laminate film layers was further validated through the assessment of the difference in surface energy (Δσ) between PLA and PVA films. The P-MFC film exhibited the lowest Δσ. The correlation between Δσ and laminate film properties was further explored through physicochemical analysis. The findings suggest that P-MFC has the greatest potential as a reinforcing filler and compatibilizer for the three-layer laminate film. Additionally, it significantly inhibited <i>S.aureus</i> growth.</p>

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Investigation of interface behavior of modified MFC-PVA/PLA laminate film; analyses of mechanical, thermal, physicochemical, and antimicrobial properties

  • 期刊论文

  • 发表日期：

    2025年10月17日

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  • Thorsak Kittikorn,
  • Rattanawadee Hedthong,
  • Wantani Chaiwong,
  • Ramitanun Malakul,
  • Suding Kadea

摘要

Laminate films were fabricated, consisting of three layers: two outer layers composed of polylactic acid (PLA), and the central layer constituted a polyvinyl alcohol (PVA)/microfibrillated cellulose (MFC) composite film. The MFC underwent two modifications: propionylation (P-MFC) and silanization with dimethyloctadecyl[3-(trimethoxysilyl)propyl] ammonium chloride (AS-MFC). The P-MFC increased the tensile modulus of the laminate film by 58%, while AS-MFC enhanced tensile strength by up to 88%. Notably, among all laminate films, the P-MFC film exhibited the highest thermal stability attributed to its larger crystallite size. Viscoelastic analysis revealed that the damping factor of the P-MFC film was the lowest, signifying the least dissipated energy. Consequently, this laminate film exhibited the most improvement in compatibility between layers. The confirmation of compatibility among laminate film layers was further validated through the assessment of the difference in surface energy (Δσ) between PLA and PVA films. The P-MFC film exhibited the lowest Δσ. The correlation between Δσ and laminate film properties was further explored through physicochemical analysis. The findings suggest that P-MFC has the greatest potential as a reinforcing filler and compatibilizer for the three-layer laminate film. Additionally, it significantly inhibited S.aureus growth.