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通过氨基开环的方法合成了聚天冬氨酸/3,5-二氨基苯甲酸接枝共聚物(PASP/3,5-DMBA),采用静态阻垢、动态腐蚀等方法考察了该共聚物的阻垢和缓蚀性能。结果表明,3,5-二氨基苯甲酸的引入可有效改善聚天冬氨酸(PASP)的阻垢与缓蚀性能,尤其在较低的浓度下对CaSO_4和Ca_3(PO_4)_2的阻垢性能有明显的提高。当PASP/3,5-DMBA药剂用量分别为1.25mg/L、6mg/L时,其对CaCO_3、CaSO_4的阻垢效率接近100%。当用量为18mg/L时,对Ca_3(PO_4)2的阻垢效率可达75%。通过扫描电镜(SEM)观察发现,加入PASP/3,5-DMBA后钙垢晶体结构发生了畸变,呈分散开花状。
The polyaspartic acid / 3,5-diaminobenzoic acid graft copolymer (PASP / 3,5-DMBA) was synthesized by amino ring-opening method. The copolymer was characterized by static scale inhibition and dynamic corrosion. The scale and corrosion inhibition. The results showed that the introduction of 3,5-diaminobenzoic acid can effectively improve the scale inhibition and corrosion inhibition of polyaspartic acid (PASP), especially at lower concentrations of CaSO_4 and Ca_3 (PO_4) _2 Performance has improved significantly. When the dosage of PASP / 3,5-DMBA was 1.25mg / L and 6mg / L respectively, the scale inhibition efficiency of CaCO 3 and CaSO 4 was close to 100%. When the dosage is 18mg / L, the scale inhibition efficiency of Ca_3 (PO_4) 2 can reach 75%. Scanning electron microscopy (SEM) observation showed that after adding PASP / 3,5-DMBA, the crystal structure of calcium scale was distorted and dispersed and flowered.