Paint & Coatings Industry >

2026 , Vol. 56 >Issue 6: 24 - 29

DOI: https://doi.org/10.12020/j.issn.0253-4312.2025-367

Technology

Preparation and Properties of UV-curable PUA/SiO2 Composite Resin

  • CAI Ruijie ,
  • WU Demin ,
  • CAI Dangrun ,
  • SUN Yongzhuang ,
  • BAO Zenong ,
  • ZHANG Shengwen
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  • School of Chemistry and Material Engineering，Jiangnan University，Wuxi，Jiangsu 214122，China

Online published: 2026-03-31

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Abstract

［Objective］ In order to improve the strength and toughness of UV-curable polyurethane materials.［Methods］ A PUA/SiO2 composite resin was prepared by compoundingpolyurethane acrylate（PUA）with nano-silica（SiO2）surface-modified by N，N-dimethylacrylamide（DMAA）. The effects of modified SiO2 content on the microstructure and properties of PUA resins andits films were investigated systematically.［Results］The modified SiO2 nanoparticles were uniformlydispersed in PUA matrix and had a slight influence on the viscosity of PUA resin. The mechanicalproperties of composite film were significantly improved at a modified SiO2 content of 5%. The modulus， tensile strength and elongation at break reached 0. 55 GPa，20. 72 MPa，and 132. 49%（representingincreases of 27. 91%，67. 78% and 27. 95%），respectively，while high transparency was maintained with a light transmittance of 91. 25% and a haze of 4. 04%.［Conclusion］The above composite resin features high strength，high toughness，and high transparency，thus exhibiting broad application prospects in the field of coatings and film materials.

Key words： polyurethane acrylate; modified SiO2; composite film; mechanical properties; optical properties

Cite this article

CAI Ruijie , WU Demin , CAI Dangrun , SUN Yongzhuang , BAO Zenong , ZHANG Shengwen . Preparation and Properties of UV-curable PUA/SiO2 Composite Resin[J]. Paint & Coatings Industry, 2026 , 56(6) : 24 -29 . DOI: 10.12020/j.issn.0253-4312.2025-367

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