聚天冬氨酸因其无毒性和优异的生物可降解性被广泛应用于阻垢领域。然而,其在实际海水中的阻垢性能尚需通过结构改性加以提升。以马来酸酐和氨水为原料,在微波辅助下,通过水相合成聚琥珀酰亚胺(PSI),并进一步与2-氨基乙磺酸(TAU)缩合,制备磺酸化聚天冬氨酸(PASP-SEA)。通过核磁共振和红外光谱对PASP-SEA的结构进行了表征,并考察了TAU/PSI配比、碱用量、反应时间和温度对产物收率的影响。结果表明:优化条件为TAU/PSI配比0.6、pH 9、反应时间接近30min、反应温度60℃。在最佳合成条件下,所得PASP-SEA分子量约为5000～7000,在实际海水中表现出优异的碳酸钙阻垢性能,效率高达98%。扫描电镜分析表明,其阻垢作用主要源于晶格畸变和沉淀络合作用。这一研究为环保高效阻垢剂在天然海水中的应用提供了理论基础和技术支持。
Polyaspartic acid (PASP) has been widely applied in the field of scale inhibition due to its non-toxicity and excellent biodegradability.However,its antiscaling performance in natural seawater requires further improvement through structural modification.In this study,maleic anhydride and ammonia were used as raw materials to synthesize poly(succinimide) (PSI) via an aqueous process under microwave-assisted conditions.Subsequently,PSI was grafted with taurine (TAU) to produce sulfonated polyaspartic acid (PASP-SEA).The structure of PASP-SEA was characterized by nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy.The effects of TAU/PSI molar ratio,alkali dosage,reaction time,and temperature on the product yield were systematically investigated.Optimal synthesis conditions were determined as follows:TAU/PSI molar ratio of 0.6,pH 9,reaction time of 30min,and reaction temperature of 60℃.Under these conditions,PASP-SEA with a molecular weight of 5000～7000 exhibited excellent calcium carbonate scale inhibition performance in actual seawater,achieving an efficiency of 98%.Scanning electron microscopy (SEM) analysis revealed that the scale inhibition mechanism mainly involved lattice distortion and strong chelation effects on the precipitate.This study provides a theoretical basis and technical support for the application of eco-friendly scale inhibitors in natural seawater.
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基金资助
国家自然科学基金面上项目(22078174);江苏省创新能力建设计划——江苏省技术创新中心课题项目(BM2021804);教育部产学合作协同育人项目(231106429150016)
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