Liu J1, Ma Y, Xu T, Shao G.
J Hazard Mater. 2010 Jun 15;178(1-3):1021-9. doi: 10.1016/j.jhazmat.2010.02.041. Epub 2010 Feb 18.A series of zwitterionic hybrid polymers were prepared from the ring-opening polymerization of pyromellitic acid dianhydride (PMDA) and phenylaminomethyl trimethoxysilane (PAMTMS), and a subsequent sol-gel process. FTIR spectra confirmed the step products. TGA analysis showed that the thermal degradation temperature increased with an increase in PMDA content. As a typical example, sample B was used to separate Cu(2+) and Pb(2+) removal by adsorption. Read More