采用溶液共混法制备聚氨酯(PU)/碳纳米管(CNTs)复合材料,并探讨碳纳米管含量和分散方法对PU/CNTs复合材料疏水性能的影响.实验结果表明,随机分布的CNTs丛提供了微米/纳米的双重粗糙结构,这种结构具有较大的孔隙率和比表面积,具有较强的疏水性质.PU/CNTs复合材料表面的水接触角随着CNTs含量的增加呈现先增大后减小的趋势,且当ω(CNTs)=5％时水接触角达到最大值111.52°；水接触角随着分散时间的延长逐渐增大,分散超过2.0h后出现了略微的下降,最佳的分散时间是2.0h;在采用不同分散方法制得的PU/CNTs中,水接触角由高到低依次是超声分散、磁力分散、机械分散,最佳分散方法为超声分散.
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