Surface characterization of TEMPO‐oxidized bacterial cellulose |
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| Authors: | Chen Lai Liyuan Sheng Shibo Liao Tingfei Xi Zhixiong Zhang |
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| Affiliation: | 1. Biomedical Material Research Center, Shenzhen campus, Beijing University, , Shenzhen, 518057 China;2. National Engineering Research Center for Biomaterials, Sichuan University, , Chengdu, 610064 China |
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| Abstract: | In this study, we focused on the surface character of bacterial cellulose (BC) before and after oxidation mediated by 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO).Solid‐state 13C NMR, XPS, SEM, contact angle and surface free energy analyses were performed to investigate the effects of various parameters (reaction time and oxidant and catalyst concentrations) on the surface composition, morphology and polarity of the BC. The results provided by the combined use of these techniques showed that hydrogen bonds were disrupted on the BC surface after carboxylation occurred; therefore, the surface of oxidized BC was rougher than that of the original BC, and the surface free energy, especially the polar components, increased after oxidation. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | bacterial cellulose hydrogen bond surface character |
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