摘要：

以4-溴-1，8-萘二甲酸酐和甲胺为原料，合成得到一种新的荧光单体4-（N’-甲基-1-哌嗪基）- N-甲基-1，8-萘二甲酰亚胺烯丙基氯化铵（FM）。通过红外光谱、核磁共振及质谱对FM进行了表征。将FM与丙烯酸（AA）、丙烯磺酸钠（SAS）、次磷酸钠共聚制备了含荧光基团的AA-SAS共聚物（FM-AA-SAS）。对该共聚物的荧光性质和阻垢性能进行了系统研究，结果表明：共聚物的荧光强度与其质量浓度呈良好的线性关系，线性相关系数为0.998 93，检测下限为0.656 6 mg/L；采用静态法，当加药质量浓度为15 mg/L时对磷酸钙的阻垢率为85.3%，对碳酸钙的阻垢率为86.5%，加药质量浓度为7.5 mg/L时对硫酸钙的阻垢率为100%，具有较好的分散氧化铁和稳定锌离子的能力。通过扫描电镜观察发现FM-AA-SAS对碳酸钙垢既有较强的分散作用又具有明显的晶格畸变能力。

关键词: 荧光单体, 共聚物, 丙烯酸, 丙烯磺酸钠, 阻垢剂

Abstract:

A novel water soluble fluorescent monomer, 4-（N’-methyl-1-piperazinyl）-N-methyl-naphthalimide allyl ammonium chloride（FM） has been synthesized from 4-bromo-1,8-naphthalic anhydride and methylamine. Its structure is characterized by IR, 1H NMR and MS. The acrylic acid / sodium acrysulfonate copolymer containing fluorescent group（FM-AA-SAS） has been prepared by copolymerization of FM, acrylic acid （AA）, sodium acrysulfonate（ SAS） and NaH₂PO₂. The effects of FM-AA-SAS on fluorescence and scale inhibition are studied systematically.The relationship of fluorescent intensity and concentration of FM-AA-SAS is linear, and the correlation coefficient is 0.998 93,the lower limit of detection is 0.656 6 mg/L. By static method, the scale inhibition rate of Ca₃（PO₄）₂ is 85.3% when the copolymer dosage is 15 mg/L. Scale inhibition rate of CaCO3 is 86.5% when the copolymer dosage is 15 mg/L. And scale inhibition rate of CaSO₄ is 100% when the copolymer dosage is 7.5 mg/L. The capacities of stabilizing Zn²⁺ and dispersing iron oxide are pretty good. It is found by electronic microscopy that FM-AA-SAS has obvious effect on CaCO₃ scale with regard to its dispersion and crystal lattice distortion capacities.

Key words: fluorescent monomer, copolymer, acrylic acid, sodium acrysulfonate, scale inhibitor

中图分类号: 

• TQ085+.412

• O623.731