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Preparation and properties of chitosan/polyvinyl alcohol blend film crosslinked with citric acid


Mohammad Amir Qureshi, Fehmeeda Khatoon


Department of Applied Sciences and Humanities, Faculty of Engineering and Technology

Jamia Millia Islamia, New Delhi-110025

Email: maq248@gmail.com



We are depriving of finding new polymer in research field from long time. So we use Polymer blending which is one of the most effective methods to develop a novel material with desired properties. Blending of polymers usually results in modification of physical and mechanical properties as compared to film made up of individual components. Blends of hydrophilic polymer are sensitive to the condition of surrounding environment and open the domain in many fields such as biomedical applications, fuel cells, water treatment, agriculture and the most relevant area of tissue engineering. We are intended to develop blend films of chitosan (CS) and polyvinyl alcohol (PVA). In order to increase the strength and water holding property of this film, we use citric acid as a cross linker which contain one Hydroxyl group and three carboxylic group.

In crosslinking, the esterification takes place in between the carboxyl group of citric acid and hydroxyl group of PVA. Modifications are confirmed by FTIR and DSC study. At particular concentration of cross linker film showed good swelling capacity and strength. DSC studies showed, the blend films have good thermal stability. In order to enhance the utility of this Film encapsulation of natural and synthetic drug also been done. Comparative study of these drug loaded blend film also tested with different bacteria.


Keywords: PVA, Chitosan, Citric Acid, FTIR, DSC.



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