Study of Covalent/Ionic Cross-Linked Modification on Physical and Mechanical Properties of Chitosan Film as Potential Material in Medical Application

Siti Farhana Hisham; Siti Hajar Kasim; Azreena Mastor; Siti Noorzidah Mohd Sabri; Syazana Abu Bakar; Wedianti Shualdi; Mohd Nasha’ain Nordin; Ahmad Hazri Abdul Rashid; Kartini Noorsal

doi:10.4028/www.scientific.net/AMM.815.89

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Study of Covalent/Ionic Cross-Linked Modification on Physical and Mechanical Properties of Chitosan Film as Potential Material in Medical Application
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 815Study of Covalent/Ionic Cross-Linked Modification...

Study of Covalent/Ionic Cross-Linked Modification on Physical and Mechanical Properties of Chitosan Film as Potential Material in Medical Application

Abstract:

The aim of this study was to investigate the effects of covalent and ionic cross-linked reactions which were respectively done by using genipin and tripolyphosphate (tpp), on the structure and mechanical properties of chitosan film. Both cross-linked and uncross-linked films were prepared by solution casting method and characterized. FTIR spectra showed no characteristic of –OCH₃ peak from genipin at 1444 cm^-1 which resulted by a new covalent bonding in chitosan film. Reduction in absorption intensity at 1560 cm^-1 wave number in chitosan cross-linked tpp films were due to the presence of ionic interaction between the positive charged of amino group in chitosan and negatively charged of phosphate group by tpp. The pattern area from the XRD results showed that the covalent cross-linked had significantly changed on the chitosan`s degree of crystallinity. The water contact angle on the surface of covalent/ionic cross-linked chitosan film reached the highest θ at 82.72° which indicated more hydrophobic properties was formed. Covalent/ionic cross-linked chitosan also showed the higher mechanical strength with average tensile stress value at 71.25 MPa. All finding results demonstrated that cross-linked modification on the chitosan film had successfully reduced the film’s hydrophilicity and increased the mechanical properties of the film.

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Periodical:

Applied Mechanics and Materials (Volume 815)

Pages:

89-93

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.815.89

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Online since:

November 2015

Authors:

Siti Farhana Hisham, Siti Hajar Kasim, Azreena Mastor, Siti Noorzidah Mohd Sabri, Syazana Abu Bakar, Wedianti Shualdi, Mohd Nasha’ain Nordin, Ahmad Hazri Abdul Rashid, Kartini Noorsal

Keywords:

Chitosan, Covalent, Cross-Linked, Genipin, Ionic, Tripolyphosphate

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