Preparation and performance of 2-acrylamido-2-methyl-propanesulfonic acid /acrylic acid copolymer containing fluorescent group
A novel water soluble fluorescent monomer,4-(N'-methyl-1-piperazinylallyl)-N-butyl-naphthalimide allyl chloride quaternary ammonium salt(FC) was synthesized from 4-bromo-1,8-maphthalic anhydride and N-methylpiperazidine.Its structure was characterized by IR,1H NMR and elemental analysis.The 2-acrylamido-2-methyl-propanesulfonic acid /acrylic acid copolymer containing fluorescent group(FC-POCA) was prepared by copolymerization of FC,acrylic acid(AA),2-acrylamido-2-methyl-propanesulfonic acid(AMPS) and NaPO3.The fluorescence and scale inhibition performance of FC-POCA was investigated.The relationship of fluorescence intensity and concentration of FC-POCA was linear,and the correlation coefficient(R) was 0.9578,and the limit of detection was 0.65 mg·L-1.By the static method,the scale inhibition ratio of CaCO3 was 77.2% when the copolymer concentration was 20 mg·L-1,scale inhibition ratio of CaSO4 was 100% when the copolymer concentration was 25 mg·L-1.The results by SEM showed that the copolymer had high performance of scale inhibition on both dispersion and lattice distortion of CaCO3.