以无水柠檬酸、L-抗坏血酸为主要原料，通过熔融缩聚法合成了一种CQDs衍生物L-CCQDs，并通过红外光谱分析仪等手段对其进行表征，得到了与理论相符合的结果。将L-CCQDs在0~80℃条件下进行阻垢静态测试，结果表明，在极少量L-CCQDs的加入条件下，阻硫酸钙和阻碳酸钙垢的阻垢率均可达到100%，与单一的无水柠檬酸相比得到明显的改善。通过SEM等方法对L-CCQDs的阻垢机制进行研究，发现随着L-CCQDs加入量的增大，碳酸钙垢的晶型逐渐由方解石向尺寸更小的霰石结构发展，证明L-CCQDs对钙垢生长有显著的抑制作用。

L-CCQDs, a CQDs derivative, is synthesized through melt polycondensation method with anhydrous citric acid and L-ascorbic acid as main raw materials, and is characterized by means of infrared spectroscopy and other means.The results are consistent with the theorical ones.L-CCQDs is subjected to static scale inhibition tests at 0-80℃, and the results show that the scale inhibition rates of calcium sulfate and calcium carbonate scales over L-CCQDs with a very small amount of addition can both reach 100%, significantly better than that over single anhydrous citric acid.The scale inhibition mechanism of L-CCQDs is studied by means of SEM and other methods.It is found that with the increasing L-CCQDs addition amount, the crystal form of calcium carbonate scale gradually develops from calcite to smaller aragonite structure, proving that L-CCQDs has a significant inhibitory effect on the growth of calcium scale.

李辉(1997-),男,硕士研究生,研究方向为绿色阻垢剂和碳量子点,huili142857@163.com