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Nanosilica modified with polyaspartic acid as an industrial circulating water scale inhibitor
npj Clean Water ( IF 11.4 ) Pub Date : 2021-09-23 , DOI: 10.1038/s41545-021-00137-y
Yamin Cheng 1, 2, 3 , Xinyu Guo 1, 2, 3 , Xiaowei Zhao 1, 3 , Yufeng Wu 1, 3 , Zhongyan Cao 1, 3 , Yonghong Cai 1 , Ying Xu 1, 2, 3
Affiliation  

Given the special performance of nanosilica with its small size, large specific surface area and high surface activity, nanosilica containing reactive amino group (denoted as SiO2–NH2) and polysuccinimide were allowed to take part in polymerization reaction to afford SiO2–NH2 modified polyaspartic acid (denoted as SiO2–NH2/PASP), a potential polymer scale inhibitor with good water solubility for industrial circulating water. The scale inhibition performance of the as-prepared SiO2–NH2/PASP was evaluated by static scale inhibition test; and its scale inhibition mechanism was explored by means of scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Results indicated that SiO2–NH2/PASP exhibits excellent scale inhibition performance against CaSO4 and CaCO3 at very low concentrations (optimum scale inhibition rate of 100% and 68%, respectively), and the presence of 5 mg/L of SiO2–NH2/PASP greatly increases the inhibition efficiency of CaSO4 and CaCO3 scale by 21% and 53%, obviously higher than that of pure PASP.



中文翻译:

聚天冬氨酸改性纳米二氧化硅作为工业循环水阻垢剂

鉴于纳米二氧化硅具有小尺寸、大比表面积和高表面活性的特殊性能,含有活性氨基的纳米二氧化硅(记为SiO 2 -NH 2)和聚琥珀酰亚胺参与聚合反应得到SiO 2 -NH 2改性聚天冬氨酸(表示为 SiO 2 –NH 2 /PASP),一种潜在的聚合物阻垢剂,具有良好的水溶性工业循环水。所制备的SiO 2 –NH 2 的阻垢性能/PASP通过静态阻垢试验评价;并通过扫描电镜、X射线衍射、X射线光电子能谱等手段探索了其阻垢机理。结果表明,SiO 2 –NH 2 /PASP在极低浓度下(最佳阻垢率分别为 100% 和 68%)以及 5 mg/L SiO 的存在对 CaSO 4和 CaCO 3具有优异的阻垢性能2 –NH 2 /PASP对CaSO 4和CaCO 3垢的抑制效率分别提高了21%和53%,明显高于纯PASP。

更新日期:2021-09-23
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