Nanocomposites of aromatic poly(amide-imide) with nanotubular Mg-Fe hydrosilicate

Composite films based on aromatic polyamide imide with carboxyl -containing fragments in repeating units (PAI-Ac) containing hydrosilicate nanotubes (Mg,Fe)(3)Si2O5(OH)(4) are structurally sensitive to the molecular weight of the polymer used. According to M delta ssbauer spectroscopy data, nanotubes introduced into a polymer matrix generally retain their original structure. When using a polymer with a relatively low molecular weight, composite films are formed that are not stable during the pervaporation of cyclohexane and ethanol. In the case of a high -molecular polymer, the resulting MMM-type membranes are stable during pervaporation. They are more permeable to polar liquids compared to the base polymer and MMMs containing Mg3S2O5 (OH)(4) nanotubes. Analysis of the found differences in the properties of the studied nanocomposites with iron -containing nanotubes in the PAI-Ac matrix from similar nanocomposites with magnesium -containing nanotubes leads to the conclusion about the need to study MMMs with iron -containing nanoparticles of a different structure.