Abstract
Composite films comprised of bacterial cellulose (BC) and collagen (COL) were developed using BC hydrogel membranes as the base material and COL as the reinforcing material. Glutaraldehyde (GT) and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC·HCl) were then used as cross-linking agents to prepare cross-linked BC/COL composite films by a wet chemical method. The effects of chemical cross-linking on the thermal and mechanical properties of composite films were investigated in detail. The COL molecules were adsorbed and deposited inside of 3D nanofiber networks of BC, coated on the surface of BC fibers. Chemical bonds formed between BC molecules, and between BC and COL molecules after cross-linking. Compared with BC, the obtained composite films showed 57.9 and 70.8% improvement in tensile strength after being cross-linked by GT and EDC·HCl, respectively. Cross-linking also enhanced the thermal stability of the specimens.
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Acknowledgments
The authors gratefully acknowledge the financial support from Jiaxing Innovation Team of Biomedical Materials (MTC2015-006) and Jiaxing Innovation Team of Cleaner Production of Leather and Textile Dyeing & Finishing (JXLD2016-06). The financial support from National Natural Science Foundation of China (51303065), Jiaxing Project of Science and Technology (2015C13005), and Scientific Research Project of Entry Exit Inspection and Quarantine Bureau (2015K151) are also acknowledged. And Q. Yang is very grateful for the China Scholarship Council for the scholarship supporting her research in Deakin University.
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Yang, Q., Ma, H., Dai, Z. et al. Improved thermal and mechanical properties of bacterial cellulose with the introduction of collagen. Cellulose 24, 3777–3787 (2017). https://doi.org/10.1007/s10570-017-1366-y
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DOI: https://doi.org/10.1007/s10570-017-1366-y