Abstract In this study, chitosan (CS)/xanthan gum (XA)/graphene oxide (GO) nanocomposite hydrogels were prepared to enhance mechanical properties of CS/XA hydrogels. The hydrogels were characterized by Fourier-transform infrared spectroscopy (FT-IR) spectra, wide-angle X-ray diffraction (WXAD) patterns, thermogravimetric analysis, and universal testing machine. The swelling ratio of dried CS/XA and CS/XA/GO films were also measured in deionized water at 37 °C. The effect of GO content on the tensile properties and swelling ratio of CS/XA/GO hydrogel films were investigated. With addition of GO, tensile strength and modulus of CS/XA hydrogel films were improved without significant decrease of elongation at break, while the swelling ratio of CS/XA/GO films decreased with increasing GO contents.

中文翻译：

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氧化石墨烯含量对壳聚糖/黄原胶/氧化石墨烯水凝胶薄膜拉伸性能和溶胀比的影响

摘要 本研究制备了壳聚糖 (CS)/黄原胶 (XA)/氧化石墨烯 (GO) 纳米复合水凝胶以增强 CS/XA 水凝胶的机械性能。水凝胶的特征在于傅里叶变换红外光谱 (FT-IR) 光谱、广角 X 射线衍射 (WXAD) 图案、热重分析和万能试验机。干燥的 CS/XA 和 CS/XA/GO 薄膜的溶胀比也在 37°C 的去离子水中测量。研究了GO含量对CS/XA/GO水凝胶薄膜拉伸性能和溶胀率的影响。随着GO的加入，CS/XA水凝胶薄膜的拉伸强度和模量得到提高，而断裂伸长率没有显着降低，而CS/XA/GO薄膜的溶胀率随着GO含量的增加而降低。