Abstract
Cellulose and chitosan solutions were prepared in 60% LiBr and mixed with a different weight ratio. The washing and drying of the prepared cellulose–chitosan composite films were performed under identical conditions. The color of the liquefied mixtures and films was initially transparent but changed from colorless to brownish yellow depending on the ratio of chitosan in the solution. The cross section observed in the SEM results indicated that the film developed with a higher ratio of chitosan was more robust and possessed greater antibacterial properties. FT-IR analysis of the films showed that hydrogen bonds between cellulose and chitosan in composite films were successfully achieved and retained excellent mechanical properties. The proper ratio of chitosan in the cellulose solution can increase the tensile strength and improve the elongation of the films; however, the E-modulus property was consistently reduced. The antibacterial activity and mechanical properties of the films were greatly improved as the amount of chitosan in the film increased.
Highlights
Environmental problems such as resource depletion and climate change have emerged as a result of the increase in fossil fuel consumption associated with industrial and technological development
Cellulose is dissolved in the LiBr solution and regenerated by cooling it down and washing it to remove the
The purpose of this study was to prepare composite films mixed with cellulose and chitosan; cellulose and chitosan were dissolved in a 60% LiBr solution
Summary
Environmental problems such as resource depletion and climate change have emerged as a result of the increase in fossil fuel consumption associated with industrial and technological development. To help solve these problems, biomass materials must be developed that do not use toxic or noxious components and have biodegradable properties [1]. It has a crystalline structure because of inter- and intra-molecular hydrogen bonds [2,3,4]. Cellulose is dissolved in the LiBr solution and regenerated by cooling it down and washing it to remove the
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