2.2.2. Composites/films preparation
The solvent-casting composites were prepared by dissolving PLA pellets in tetrahydrofuran (THF) (10%, w/v) and mixed with hydrophobic modified NCF. The modified NCF was added into the PLA solution after the PLA pellets were dissolved completely, and the mixture was thoroughly stirred for 2 h. For reference, pure PLA films were made by dissolving PLA pellets in THF and those solutions were cast onto Petri dishes. Similarly, the composite films with 0, 1, 5, 7, 10% (w/w) of modified NCF in PLA matrix were also prepared subsequently before being coated on hand sheets. The supension mixture of PLA and NCF were also casted onto glass Petri dishes and left in a fume hood overnight to evaporate the solvent.The films were removed from the Petri dishes by dipping them into a glass bowl with deionized water for 10 s and then the films were carefully peeled off from the glass and stored in a vacuum desiccator until use.
2.2.2. Composites/films preparationThe solvent-casting composites were prepared by dissolving PLA pellets in tetrahydrofuran (THF) (10%, w/v) and mixed with hydrophobic modified NCF. The modified NCF was added into the PLA solution after the PLA pellets were dissolved completely, and the mixture was thoroughly stirred for 2 h. For reference, pure PLA films were made by dissolving PLA pellets in THF and those solutions were cast onto Petri dishes. Similarly, the composite films with 0, 1, 5, 7, 10% (w/w) of modified NCF in PLA matrix were also prepared subsequently before being coated on hand sheets. The supension mixture of PLA and NCF were also casted onto glass Petri dishes and left in a fume hood overnight to evaporate the solvent.The films were removed from the Petri dishes by dipping them into a glass bowl with deionized water for 10 s and then the films were carefully peeled off from the glass and stored in a vacuum desiccator until use.
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