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用电子显微镜观察了在加热台上超过滤膜的形态结构由室温至150℃范围内的变化,半定量计算了断面孔的最大二维形变率,同时对不同温度热处理的超过滤膜,直接进行了膜透过特性试验,进一步确定了膜的耐热性。通过对聚砜(PS)、聚醚砜(PES)、聚芳砜(PDC)和醋酸纤维素(CA)超过滤膜的实际考察表明,聚砜类超过滤膜有良好耐温性,膜的使用温度界限可达120℃。
The morphological changes of ultrafiltration membrane on the heating stage were observed by electron microscopy from room temperature to 150 ℃. The maximum two-dimensional deformation rate was calculated semi-quantitatively. At the same time, the ultrafiltration membrane heat-treated at different temperatures was directly processed The membrane permeability test further determined the heat resistance of the membrane. The actual investigation of ultrafiltration of polysulfone (PS), polyethersulfone (PES), polyarylsulfone (PDC) and cellulose acetate (CA) showed that polysulfone ultrafiltration membrane has good temperature resistance and membrane Operating temperature limit of up to 120 ℃.