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Investigation into the adsorption of partially hydrolyzed polyacrylamide onto in situ formed magnesium hydroxide particles

机译：将部分水解的聚丙烯酰胺吸附到原位成分氢氧化镁颗粒上的吸附

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摘要

In situ formed magnesium hydroxide (Mg(OH)(2)) particles were investigated through the direct wet precipitation method in the presence of two partially hydrolyzed polyacrylamides (HPAM) of different molecular weights. The influence of the reaction parameters, such as MgCl2 concentration, pH, and reaction temperature, on the interactions between in situ formed Mg(OH)(2) particles and HPAM molecules was investigated. The Mg(OH)(2) particles obtained in the absence and presence of polymers were characterized in terms of their morphology, particle size, and crystal habit by high-resolution transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, dynamic light scattering, and zeta potential measurements. It was found that different pH values of the reaction solution led to different predominant species distribution for MgCl2. The adsorbed polymer led to the formation of four distinct adsorption regions as the concentration of polymer increased. The adsorption of partially hydrolyzed polyacrylamide on the oppositely charged Mg(OH)(2) particles was explained by electrostatic attraction, hydrogen bonding, and bridging.
机译：原位形成的氢氧化镁（Mg（OH）（2））通过直接湿沉淀法在不同分子量的两种部分水解的聚丙烯酰胺（HPAM）存在下进行研究。研究了反应参数，例如MgCl 2浓度，pH和反应温度的影响，对原位形成的Mg（OH）（2）颗粒和HPAM分子的相互作用进行研究。在没有高分辨率透射电子显微镜，X射线衍射，傅里叶变换红外光谱，动态的情况下，在它们的形态，粒度和晶体习惯中获得的Mg（OH）（2）的颗粒的表征在于它们的形态，粒度和晶体习惯。动态光散射和Zeta电位测量。发现反应溶液的不同pH值导致MgCl 2的不同主要物种分布。由于聚合物的浓度增加，吸附的聚合物导致形成四个不同的吸附区。部分水解的聚丙烯酰胺的上带相反电荷的Mg（OH）的吸附（2）的颗粒通过静电吸引，氢键，和桥接说明。

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  • 来源
    《RSC Advances》 |2016年第37期|共9页
  • 作者

    Li Feng; Ye Lanlan; Li Yujiang; Wu Tao;

  • 作者单位

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Key Lab Water Pollut Control &

    Reso Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Key Lab Water Pollut Control &

    Reso Jinan 250100 Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Key Lab Water Pollut Control &

    Reso Jinan 250100 Peoples R China;

    Shandong Univ Key Lab Colloid &

    Interface Sci Educ Minist Jinan 250100 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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