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采用改进的Hummers法制备氧化石墨(GO),超声剥离得到氧化石墨烯(GOs),借助TEM、AFM、FT-IR和XRD对样品的形貌结构进行了表证,结果表明制得了富有含氧基团(C=O、—OH、—COOH、C—O—C等)的具有较好稳定性的GOs。通过湿法成膜制备了GOs改性的聚氨酯微孔膜,探讨了加入的GOs含量对复合聚氨酯PU微孔膜相关性能的影响,结果表明:当加入质量分数0.1%的GOs时,PU微孔膜的力学性能提高最明显;随着GOs含量的增加,复合膜体积电阻系数较空白样先增大后减小,在加入1.0%的GOs时,体积电阻系数开始低于空白样的即导电性有所提高;复合膜的吸湿率、孔隙率和透湿量,随着GOs添加量的增加均呈现增大的趋势,说明GOs的加入对PU微孔膜通透性能的改善亦有显著影响。
Graphite (GO) was prepared by the modified Hummers method, and graphene oxide (GOs) was obtained by ultrasonic stripping. The morphology of the samples was characterized by TEM, AFM, FT-IR and XRD. (C = O, -OH, -COOH, C-O-C, etc.) with better stability of the GOs. The GOs modified polyurethane microporous films were prepared by wet film forming. The effects of the content of added GOs on the properties of polyurethane PU microporous films were investigated. The results showed that when adding GOs with mass fraction of 0.1%, PU micropores With the increase of GOs content, the volume resistivity of the composite membrane first increases and then decreases after adding 1.0% GOs, the volume resistivity of the composite membrane begins to be lower than that of the blank sample, ie, the conductivity The moisture absorption rate, porosity and water vapor transmission rate of the composite membranes increased with the addition of GOs, indicating that the addition of GOs also had a significant effect on the improvement of PU microporous membrane permeability.