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<p>This research outlines the synthesis and functional evaluation of novel biohybrid hydrogels formulated through the copolymerization of acrylamide and sodium acrylate, enriched with guar gum (as a hydrocolloid), kaolin clay, and poly(ethylene glycol) diacrylate (PEGDA, 1.0%) serving as the crosslinker. The polymer networks were constructed under ambient conditions via free radical polymerization initiated by a redox pair composed of APS/TEMED. The macroporous polymeric samples that were synthesized underwent characterization through swelling tests, Fourier Transform Infrared Spectroscopy (FT-IR), and Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX).&#xa0;Swelling characteristics were examined gravimetrically in distilled water at 25&#xa0;°C, yielding equilibrium swelling values between 760% and 4147%. The hydrogels’ capacity for binding the cationic dye Union Green B was explored using a batch adsorption method at constant temperature. Dye uptake ranged from 1.92 × 10⁻⁴ to 5.67 × 10⁻⁴ mol g⁻¹, removal efficiencies spanned 41.93% to 96.07%, and partition coefficients varied from 0.56 to 24.46. These findings support the potential use of these hydrogel systems as multifunctional platforms in sorption-based environmental applications.</p> Graphical abstract <p></p>

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Development of poly(acrylamide-co-sodium acrylate) hydrogels incorporating hydrocolloid and clay as efficient biosorbents

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月6日

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  • Semiha Kundakci,
  • Savaş Ağkuş,
  • Omer Barıs Üzüm,
  • Erdener Karadağ

摘要

This research outlines the synthesis and functional evaluation of novel biohybrid hydrogels formulated through the copolymerization of acrylamide and sodium acrylate, enriched with guar gum (as a hydrocolloid), kaolin clay, and poly(ethylene glycol) diacrylate (PEGDA, 1.0%) serving as the crosslinker. The polymer networks were constructed under ambient conditions via free radical polymerization initiated by a redox pair composed of APS/TEMED. The macroporous polymeric samples that were synthesized underwent characterization through swelling tests, Fourier Transform Infrared Spectroscopy (FT-IR), and Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX). Swelling characteristics were examined gravimetrically in distilled water at 25 °C, yielding equilibrium swelling values between 760% and 4147%. The hydrogels’ capacity for binding the cationic dye Union Green B was explored using a batch adsorption method at constant temperature. Dye uptake ranged from 1.92 × 10⁻⁴ to 5.67 × 10⁻⁴ mol g⁻¹, removal efficiencies spanned 41.93% to 96.07%, and partition coefficients varied from 0.56 to 24.46. These findings support the potential use of these hydrogel systems as multifunctional platforms in sorption-based environmental applications.

Graphical abstract