Ly-CCQDs,a CCQDs derivative,is synthesized via the melt polycondensation method with anhydrous citric acid and L-lysine as main raw materials,and characterized by means of infrared spectrometer,ultraviolet-visible spectrophotometer,etc.The scale inhibition static test to Ly-CCQDs is carried out at 40-80℃.It is shown that the scale inhibition rates of Ly-CCQDs against calcium sulfate and calcium carbonate scale both reach 100％under a very small addition amount of CCQDs,showing a significant improvement than that of anhydrous citric acid alone.The scale inhibition mechanism of Ly-CCQDs is studied through SEM,and it is found that the crystal form of calcium carbonate scale changes with the increasing addition amount of Ly-CCQDs,and gradually develops from calcite to smaller aragonite structure,proving that Ly-CCQDs has a significant inhibitory effect on the growth of calcium scale.
维普
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