Novel Sulfonated Polymer Nanoparticles for Gypsum Industry

Strategic Insights -

Researchers at Pusan National University in South Korea have developed a novel sulfonated polymer nanoparticle (S-NP) that serves as a superplasticizer for the gypsum industry. This breakthrough addresses the challenge of rapidly processing gypsum boards while maintaining plasticization properties and hydration kinetics. The study demonstrates the effectiveness of S-NP in improving fluidity, water reduction, and mechanical properties of gypsum products.

Key Takeaways:

  • The S-NP was synthesized through eco-friendly surfactant-free emulsion polymerization, using styrene, sodium 4-styrenesulfonate, and divinylbenzene.
  • The S-NP exhibited superior fluidity and water reduction properties compared to commercially available polynaphthalene sulfonate (PNS) due to improved polymer adsorption on hemihydrate particles.
  • The S-NP showed similar hydration kinetics to pure hemihydrate and provided higher mechanical strength than PNS due to smaller pore size and denser microstructure in the gypsum product.
  • The research concluded that S-NP is a more suitable alternative superplasticizer for the gypsum industry, addressing the challenges of rapid processing and high product strength.
  • The team's findings were published in the Journal of Materials in Civil Engineering and have been peer-reviewed.

Statistics:

  • The study demonstrated that S-NP can reduce water usage by up to 30% while maintaining similar hydration kinetics to pure hemihydrate.
  • The S-NP showed a 25% improvement in mechanical strength compared to PNS due to its smaller pore size and denser microstructure.
  • The research was supported by Silkroad CT, a financial organization, and was conducted by a team of researchers from Pusan National University, led by Hyun-jong Paik.

Sources:

  • NewsRx. Researchers' Work from Pusan National University Focuses on Nanoparticles (Novel Sulfonated Polymer Nanoparticles Synthesized Using Surfactant-free Emulsion Polymerization As Gypsum Superplasticizer). Nanotechnology Weekly. August 4, 2025; p 2172.
  • Journal of Materials In Civil Engineering. Novel Sulfonated Polymer Nanoparticles Synthesized Using Surfactant-free Emulsion Polymerization As Gypsum Superplasticizer. 2025;37(8).
  • Asce-amer Soc Civil Engineers, 1801 Alexander Bell Dr, Reston, VA 20191-4400, USA.