【摘要】 利用场发射扫描电镜、能量色散X射线分析、原子力显微镜与傅里叶转换红外光谱技术 ,对NF4 5纳滤膜的表面形态、孔径分布进行了分析研究 ,同时考察了大豆乳清液的纳滤膜污染特征 .研究表明 :NF4 5膜的孔径范围小于 0 5nm ,膜孔分布均匀 ,平均表面粗糙度为 9 4nm ,波峰高度是纳米级 ;而污染膜面基本表现为无数小葡萄球状的低聚糖类物质组成的块状 ,且污染物层分布很不均匀 ,波动很大 ,平均表面粗糙度为 4 39 7nm ,波峰高度是微米级的 .更多还原

【Abstract】 An aromatic polyamide nanofiltration membrane(DOW,NF 45) has been charac terized by four different techniques: field emission scanning electron microscop y, energy dispersive X-ray analysis, atomic force microscopy, and FTIR spectrosc opy. The surface morphology and pore size distribution of the new membrane has b een investigated and its fouling characteristics identified. The studies indica te that the mean pore diameter of the NF45 membrane is below 0.5 nm and the pore distribution is uniform with an average surface roughness of 9.4 nm, while the surface of the fouled membrane resembles a cake consisting of many small grape l ike spherical oligosaccharides with an average surface roughness of 439.7 nm. Mo r eover, the height of the wave crests is at the nanometer level for the new membr ane and the micrometer level for the fouled membrane.更多还原