氧化石墨烯改性磺酸型水性聚氨酯的制备与性能研究

首先对石墨进行氧化处理制备氧化石墨(GO),然后对GO进行超声处理得到氧化石墨烯(GOs),并通过共混法制备了水性聚氨酯(WPU)/GOs复合材料。讨论了超声分散以及GOs加入量对WPU/GOs复合材料力学性能和热稳定性的影响。结果表明,经过超声分散的复合材料的力学性能比未超声分散的好;随着GOs含量的增加,复合材料的拉伸强度先增大后减小,断裂伸长率逐渐减小;加入质量分数0.50%的GOs,其WPU/GOs复合材料的热分解温度可提高44.7℃,明显提高WPU的热稳定性。

Synthesis and Properties of Graphene Oxide Modified Sulfonated Waterborne Polyurethane

The graphite oxide （GO） firstly was prepared from graphite by Hummers method, then graphite oxide was dealt with ultrasonic to obtain graphene oxide （GOs）. The waterborne polyurethane graphene oxide composite （WPU/GOs） were prepared with blending method. The effect of ultrasonic dispersion and GOs addition on mechanical properties, the mechanical property and thermal stability of WPU/GOs composites were discussed. The results showed that the mechanical properties of composite materials with ultrasonic dispersion were better than those without ultrasonic dispersion. With the contents of GOs increasing, the tensile strength increased first and then decreased, the elongation at break decreased slowly. The thermal decomposition temperature of the WPU/GOs composites were improved by 44. 7℃ when the amount of GOs reached 0.5 % , the thermal stability of WPU was significantly improved.