Journal
CARBOHYDRATE POLYMERS
Volume 88, Issue 3, Pages 1100-1108Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.01.071
Keywords
Alginate; Graphene oxide; Composite fiber; Mechanical strength; Cells culture
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Funding
- National Science Foundation of China [21074089, 50873075, 50603017]
- Tianjin Municipal Science and Technology Commission, PR China [09JCZDJC23300]
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Sodium alginate/graphene oxide (NaAlg/GO) fibers were prepared using a wet spinning method. Their structures and properties were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and mechanical strength testing. The incorporation of GO significantly improved the strength of the NaAlg/GO fibers owing to the uniform distribution of the GO nanosheets in the NaAlg matrix. The maximum tensile strength and Young's modulus increased from 0.32 and 1.9 to 0.62 and 4.3 GPa, respectively, at 4 wt% GO loading. The composite fibers had an even higher strength when they were stretched. The tensile strength increased by 43% over the un-stretched fiber, and Young's modulus increased to 9.39 GPa. In aqueous solution, the GO/NaAlg fibers swelled to form hydrogel fibers that are nontoxic to cells which demonstrated the potential applications of the as-spun fibers in wound dressing materials. (C) 2012 Elsevier Ltd. All rights reserved.
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