Abstract

In the study, a novel and highly effective binary scale inhibitor was synthesized by using polysuccinimide and oxidized starch as raw materials by chemical modification, namely polyaspartic acid/oxidized starch copolymer (PASP/OS). The chemical structure of PASP/OS was characterized by Fourier transform infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance (¹H NMR). Subsequently, the inhibition efficiency of PASP/OS against CaCO₃ and CaSO₄ was studied by static tests, while the inhibition performance and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). And the effects of the concentration of PASP/OS, temperature, heating time, pH and Ca²⁺ concentration against CaCO₃ scale were analyzed. In addition, the dispersion capacity of PASP/OS for Fe₂O₃ was studied, and the inhibition mechanism of PASP/OS was also analyzed. The results showed that PASP/OS was successfully synthesized, and PASP/OS had excellent inhibition performance and dispersion capacity. PASP/OS inhibited scale formation by chelation, dispersion, and crystal distortion.

摘要

本研究以聚琥珀酰亚胺和氧化淀粉为原料，通过化学改性合成了一种新型高效的二元阻垢剂，即聚天冬氨酸/氧化淀粉共聚物（PASP/OS）。PASP/OS 的化学结构通过傅里叶变换红外光谱 (FT-IR) 和质子核磁共振 ( ¹ H NMR)表征。随后，通过静态试验研究了PASP/OS对CaCO ₃和CaSO ₄的抑制效率，同时通过X射线衍射（XRD）和扫描电子显微镜（SEM）对其抑制性能和形貌进行了表征。以及 PASP/OS 浓度、温度、加热时间、pH 和 Ca ²⁺浓度对 CaCO 的影响_3个量表进行了分析。此外，研究了PASP/OS对Fe ₂ O ₃的分散能力，分析了PASP/OS的抑制机理。结果表明，PASP/OS合成成功，且PASP/OS具有优异的抑制性能和分散能力。PASP/OS 通过螯合、分散和晶体变形抑制水垢形成。