Abstract: A novel polyampholyte super-absorbent nanocomposite with acrylate sodium, acryloyxyethyl trimethyl ammonium chloride(DAC) and montmorillonite(MMT) was synthesized by in situ solution polymerization in aqueous solution. The morphology structures of composites were investigated by XRD and TEM. The results show that a series of intercalated polymer-MMT super absorbent nanocomposite were produced. Due to the introduction of MMT, the swell ratio of nanocomposite was up to 2 380 g/g and the gel antipressure intensity was enhanced by 180%. In the same time, the investigation indicates that the formation of intercalated nanocomposite was promoted by the addition of DAC owing to the strong interaction between DAC and the platelets of MMT. On the other hand, the sensitivity of ampholyte composite to pH could be observed when the polyampholyte super-absorbent nanocomposites were soaked into NaCl solution with a mass fraction 09% at different pH values.

Key words: Polyampholyte, Super-absorbent nanocomposite, Antipressure intensity