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Enhancement of Bacterial Cellulose Rehydration Via Btca Cross-Linking



Meftahi A1 ; Khajavi R2 ; Rashidi A1 ; Rahimi MK3 ; Bahador A4
Authors
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Authors Affiliations
  1. 1. Department of Textiles, Science and Research Branch, Islamic Azad University, Tehran, Iran
  2. 2. Department of Polymer and Textile Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
  3. 3. Department of Microbiology, Tehran Medical Branch, Islamic Azad University, Tehran, Iran
  4. 4. Department of Microbiology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran

Source: Bulgarian Chemical Communications Published:2018

Abstract

Low rehydration ability of bacterial cellulose (BC) after its first drying is an unfavourable effect especially for biomedical applications. In this study, it was aimed to overcome this defect through BC cross-linking. So, 1,2,3,4-butanetetracarboxylic acid (BTCA), as a common cross-linker of cotton, was used in different concentrations (5, 10 and 20w/v %) for this purpose. BC samples were cross-linked after synthesis in their wet state. Cross-linking of BC didn’t show any significant change in XRD patterns in compare with uncross-linked (raw) samples. Meanwhile, BET surface area testing showed that the surface volume of the cross-linked sample with BTCA 20% has increased 12 times more than uncross-linked BC. Surface and cross section FESEM images showed also thepreserved structure of cross-linked BC. In addition, water absorption of cross-linked sample (BTCA 20%) was about 300% more than uncross-linked sample. Comparing them indicated that cross-linked sample had more water swelling rate and lower water release rate and finally it was concluded that cross-linked BC show a high potent for medical applications. © 2018 Bulgarian Academy of Sciences, Union of Chemists in Bulgaria.