The effect of dissolution time on wettability and certain properties of cellulose film produced using ionic liquid

Document Type : Research Paper

Authors

1 M.Sc., Wood and paper science and technology department, Natural resources faculty, Tarbiat Modarres university, Noor, Mazandaran, Iran

2 Assistant Prof., Wood and paper science and technology department, Natural resources faculty, Tarbiat Modarres university, Noor, Mazandaran, Iran

3 Associate Prof., Wood and paper science and technology department, Natural resources faculty, Tarbiat Modarres university, Noor, Mazandaran, Iran

4 Assistant Prof., Department of wood engineering and technology, Gorgan university of agricultural sciences and natural resources, Gorgan, Iran

Abstract

Wettability and some other physical and mechanical properties of cellulose films are as restricting factors in application of such biodegredable films. Since it is proposed that the dissolution process parameters may significantly affect the cellulose film structure and properties, in this research, the effect of dissolution time on wettability and some substantial properties of cellulose film was evaluated. In this due, cotton linter was dissolved in 1-butyl 3-methyl imidazolium chloride for 1, 3 and 5 hours, and following being washed with distilled water as an anti-solvent, the cellulose films were casted on petri-dishes and dried in 60 °C oven. In order to research the effect of dissolution time on chemical and physical structure of the films, FTIR and X-ray diffraction were applied. Moreover, mechanical properties, such as tensile strength, modulus of elasticity and elongation at break, and some physical characteristics as moisture absorption and water droplet contact angle were studied. FTIR spectra analysis revealed that following increasing the dissolution time, no change in chemical structure of cellulose films was observed. But, the analysis of XRD patterns demonstrated a minor rise in crystallinity index following increasing the dissolution time. In addition, it was revealed that the degree of polymerization, tensile strength and elongation at break decreased as dissolution time increased; while there was no significant change in modulus of elasticity. The highest moisture absorption rate in cellulose films was occurred early in the absorption diagram, and the increase in dissolution time, resulted an increase in water droplet contact angle at zero time.

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References

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Iranian Journal of Wood and Paper Industries
Volume 9, Issue 2
September 2018
Pages 223-234

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