Preparation and Characterization of Poly(aspartic Acid) Derivatives as Biodegradable Water Treatment Agents

Abstract

Two poly(aspartic acid) derivatives (PASP-GLU and PASP-SEA-GLU) were prepared from polysuccinimide (PSI), taurine (SEA) and glutamic acid (GLU). The structure of poly(aspartic acid) derivatives were characterized by means of FTIR. The performance of scale inhibition, dispersion and biodegradation were studied. The results showed that PASP-SEA-GLU and PASP-GLU both have better scale inhibition and dispersion performance than PASP and PASP-GLU has better scale inhibition performance; PASP-SEA-GLU has better dispersive performance. PASP-SEA-GLU and PASP-GLU were easily biodegradable. The crystal samples of calcium carbonate were characterized by SEM. The results showed that the crystal form of calcium carbonate was global vaterite after poly(aspartic acid) derivative was added.