Preparation and characterization of quaternary PAM microgel(CPAM) and CPAM/PWA composite microspheres
LI Hong1, SHEN Shu-kun2, CUI Xin-ai2
(1 College of Environment and Chemical Engineering, Xi′an Polytechnic University,Xi′an 710048, Shaanxi, China;2 College of Materials Science and Engineering,Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Quaternary PAM microgel (CPAM) was synthesized by reaction of PAM microgel with hydroxymethyl dimethylammonia through Mannich reaction,and dodecyl bromide. The CPAM/PWA composites microspheres were obtained by ion-exchange of those quaterised microspheres (CPAM) in the HPW aqueous solution. The morphologies and compositions of the CPAM/PWA composite microspheres, as well as the effects of reaction conditions, were investigated by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray photoelectron spectra (XPS) and Fouier transform infrared spectroscopy (FT-IR) , respectively. The results indicate that the CPAM/PWA composite microspheres exhibit smooth surface and unchanged spherical shape, and swelling degree decreases with quaternary modification. The ratio of PAM to hydroxymethyl dimethylammonia is a key factor to affect not only the HPW loading, but also the swelling degree of CPAM/PWA composites microspheres.
KeyWords:
PAM microgel; Mannich reaction; CPAM/PWA composite microspheres
