中国塑料 ›› 2021, Vol. 35 ›› Issue (11): 55-63.DOI: 10.19491/j.issn.1001-9278.2021.11.009

• 材料与性能 • 上一篇    下一篇

无磷型绿色端羧基超支化聚酯的制备及其阻垢行为研究

李美兰1,2(), 何娇1, 龚伟1,2(), 贺肖妮1, 来倩1, 刘白玲2   

  1. 1.商洛学院/陕西省尾矿资源综合利用重点实验室,陕西 商洛 726000
    2.中国科学院成都有机化学研究所,成都 610041
  • 收稿日期:2021-04-30 出版日期:2021-11-26 发布日期:2021-11-23
  • 作者简介:李美兰(1988-),女,讲师,主要从事水处理与功能材料的研究,liecho2009@163.com
  • 基金资助:
    陕西省大学生创新创业计划训练项目(S202011396085);陕西省科技厅自然科学项目(2019JQ?907);商洛学院自然科学项目(16SKY022)

Construction and Scale Inhibition Behavior of Phosphorus⁃free Green Carboxyl⁃terminated Hyperbranched Polyester

LI Meilan1,2(), HE Jiao1, GONG Wei1,2(), HE Xiaoni1, LAI Qian1, LIU Bailing2   

  1. 1.Key Laboratory of Comprehensive Utilization of Tailings Resources in Shaanxi Province,Shangluo University,Shangluo 726000,China
    2.Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,China
  • Received:2021-04-30 Online:2021-11-26 Published:2021-11-23
  • Contact: GONG Wei E-mail:liecho2009@163.com;gongwei?com@163.com

摘要:

采用酯化反应,以衣康酸、三乙醇胺及琥珀酸为反应单体,构建出了一种可用于工业循环用水阻垢分散的无磷型绿色端羧基超支化聚酯,通过静态阻垢实验探讨了无磷型绿色端羧基超支化聚酯在不同影响因素下的阻垢分散能力,同时测定了该阻垢剂的生物降解性能及对水体的生态效应。结果表明,无磷型绿色端羧基超支化聚酯对氧化铁具有优异的分散效果,并且在较高温度及较宽pH范围内对CaCO3和CaSO4均具有良好的阻垢分散性能,当阻垢剂用量为20 mg·L-1和12 mg·L-1时,其对CaCO3和CaSO4的阻垢率分别达到了93.8 %和96.2 %;无磷型绿色端羧基超支化聚酯用于钙垢阻垢时,不仅能破坏钙垢晶体的规整性,而且还能降低钙垢的结晶度,从而有效抑制钙垢的生长,实现阻垢分散的目的;该阻垢剂具有良好的生物降解性,在第28 d时,其生物降解率可达67.2 %,且基本不影响水体中微生物的生长。

关键词: 衣康酸, 工业循环水, 端羧基超支化, 生物降解性, 阻垢分散剂

Abstract:

Carboxyl terminated hyperbranched polyester as a phosphorus?free green scale inhibitor was successfully prepared through esterification with itaconic acid, triethanolamine and succinic acid as reaction monomers, and its scale inhibition and dispersion ability under different influence factors was studied by a static scale inhibition experiment. The biodegradability and ecological effects of the scale inhibitor were also determined. The results indicated that the scale inhibitor not only had good dispersibility for Fe2O3 but also had good scale inhibiting effect for CaCO3 and CaSO4 under wide temperature and pH ranges. When the dosage of scale inhibitor was 20 and 12 mg/L, the scale inhibition efficiency for CaCO3 and CaSO4 reached 93.8 % and 96.2 %, respectively. The XRD and SEM analysis showed that the scale inhibitor not only effectively destroyed the regularity of calcium scale crystal but also reduced the crystallinity of calcium scale. This can effectively inhibit the growth of calcium scale, achieving the purpose of scale inhibition and dispersion. In addition, the scale inhibitor had excellent biodegradability with a biodegradation rate of 67.2 % after 28 days. Moreover, the scale inhibitor does not affect the growth of microorganisms of water.

Key words: itaconic acid, industrial circulating water, carboxyl terminated hyperbranch, biodegradability, scale inhibitor and dispersant

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