氢键作用对纳滤过程荷电效应的影响

Effect of Hydrogen Bonds on the Static Effect of Nanofiltration Process

极性有机分子可以和聚酰胺类纳滤膜表面形成众多氢键,从而削弱纳滤膜的荷电效应。论文选择几种典型极性分子,探讨氢键作用对纳滤过程荷电效应的影响。结果表明,在极性分子和聚酰胺类纳滤膜形成氢键的过程中,聚酰胺纳滤膜对电解质的截留率有所下降。这种影响随分子极性增强而更加明显;当温度升高时,氢键遭到破坏,截留率有所回升。

Hydrogen bonds may form between polar organic molecules and polyamides on the surface of the nanofihration membrane. As a result, the Donnon effect is weakened. The effect of hydrogen bonds on the Donnon effect in the nanofiltration process was investigated by employing several typical polar organic molecules. Results showed that the rejections to electrolytes declined if the hydrogen bonds between the polar organic molecules and the membrane formed. And the more polarity the molecular have, the more notable the effect is. If the temperature increases, hydrogen bonds are damaged, thereby the rejections to electrolytes rise again.