Synthesis and scale inhibition of polyaspartic acid as a water treatment

PASP was synthesized from the L-aspartic acid under microwave irradiation by direct polymerization based on the theory of microwave polymerization.The 1H-NMR analysis results show that the function group of the product has the same charateristis as that of PASP.In order to under inhibition behavior of polyaspartic acid on calcium carbonate,experimental study has been carried out with a static method under different conditions.As a result,the polyaspartic acid shows the best calcium carbonate inhibition capability for high calcium concentration under 90℃ of temperature,9 of pH value,The scale inhibition rate can be more than 94%.Besides,it has analyzed the mechanism of polyaspartic acid's scale inhibition with the SEM technology.