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Experimental and thermodynamic investigation of the stability of copolymer grafted bentonite nanoclays in a high salinity electrolyte

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Abstract

The aggregation kinetics of different surface modified nanoclays in a high salinity electrolyte was investigated in the presence of partially hydrolyzed polyacrylamide. The results obtained by UV–Vis spectroscopy, transmission electron microscopy, zeta potential and dynamic light scattering measurements indicated that partially hydrolyzed polyacrylamide enhanced the stability of the surface modified nanoclays in their suspensions at various pH values. This was ascribed to its adsorption on the surfaces of the nanoclay particles to further prevent their aggregation and settling in the solution. In addition, thermodynamic parameters controlling the interactions between the surface grafted nanoclay particles and the adsorbing polymer chains were determined using the adsorption isotherms of the system.

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Authors and Affiliations

  1. Chemical and Polymer Technology Development Division, Research Institute of Petroleum Industry (RIPI), 14665/137, Tehran, Iran

    Alireza Khoshniyat & Jamal Aalaie

  2. Department of Polymer Reaction Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, 14155/143, Tehran, Iran

    Alireza Sharif

Authors
  1. Alireza Khoshniyat
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  2. Alireza Sharif
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  3. Jamal Aalaie
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Correspondence to Alireza Khoshniyat.

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Khoshniyat, A., Sharif, A. & Aalaie, J. Experimental and thermodynamic investigation of the stability of copolymer grafted bentonite nanoclays in a high salinity electrolyte. Polym. Sci. Ser. A 57, 883–888 (2015). https://doi.org/10.1134/S0965545X1507007X

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  • DOI: https://doi.org/10.1134/S0965545X1507007X

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