A facile route to prepare cellulose-based films.

Area of Science:

• Materials Science
• Polymer Chemistry
• Green Chemistry

Background:

• Cellulose is abundant, renewable, and biodegradable, but its insolubility limits applications.
• Petroleum-based materials face increasing demand for sustainable alternatives.

Purpose of the Study:

• To investigate the feasibility of dissolving cellulose using inorganic salt solutions.
• To explore methods for enhancing the properties of dissolved cellulose.

Main Methods:

• Dissolving cellulose in concentrated zinc chloride (ZnCl2) solutions (64-72%).
• Utilizing Fourier-transform infrared (FTIR) spectroscopy to analyze interactions.
• Incorporating calcium ions (Ca2+) to modify Zn-cellulose solutions.

Main Results:

• ZnCl2 solutions effectively solubilize cellulose by weakening hydrogen bonds.
• Ca2+ ions promote nano fibril formation and gelling.
• Ca2+ addition increased tensile strength of cellulose films by approximately 250%.

Conclusions:

• Concentrated ZnCl2 solutions offer a cost-effective, recyclable, and green method for cellulose solubilization.
• The process is simple and scalable for industrial applications.
• This approach unlocks new possibilities for cellulose in diverse fields like biomedical and food industries.