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Feasibility of AMPS Hydrogel for Surface Cleaning in Art Conservation

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Abstract:

This study investigated the feasibility of using hydrogels based on 2-acrylamido-2-methylpropane sulfonic acid sodium salt (AMPS-Na⁺) as rigid solvent gels for cleaning art surfaces. Hydrogels were synthesized from AMPS-Na⁺ (10–50 %w/v) using ethylene glycol dimethacrylate (EGDM, 0.05–0.25 mol%) as a crosslinker and 2,2′-azobis (2-methylpropionamidine) dihydrochloride (CPAD, 0.05–0.25 mol%) as an initiator under UV irradiation. The gel formation, swelling capacity, and water retention were evaluated to determine the optimal composition. Results showed that 50% AMPS combined with 0.25 mol% EGDM and 0.25 mol% CPAD produced a stable, transparent hydrogel with excellent swelling ability (6,793%) and structural uniformity. FTIR spectra confirmed successful copolymerization of AMPS, EGDM, and CPAD, maintaining functional groups such as –SO₃⁻ and C=O without chemical degradation. DSC thermograms revealed improved thermal stability and homogeneity at higher CPAD concentrations. The optimized hydrogel exhibited high water uptake, controlled evaporation, and reusability, suggesting strong potential as a safe and effective cleaning.

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Periodical:

Advances in Science and Technology (Volume 179)

Pages:

15-19

DOI:

https://doi.org/10.4028/p-nYx3JM

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Online since:

June 2026

Authors:

Passanun Chuangjaroen, Sutinee Girdthep*

Keywords:

AMPS Hydrogel, Art Conservation, Cleaning Gel, Swelling Behavior, Thermal Stability

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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