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<p>In this paper, amino-terminated polymethylvinylsiloxane was synthesized via anionic ring-opening polymerization using Octamethylcyclotetrasiloxane (D<sub>4</sub>), 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinyl cyclotetrasiloxane (D<sub>4</sub>V), 1, 3-Bis (3-aminopropyl) -1, 1, 3, 3 tetramethyldisiloxane (AT) as precursors, followed by modification with epoxy resin. Subsequently, a hydrosilylation reaction with hydrogen-containing silicone oil was conducted. This process produced microspheres where the epoxy modification and crosslinking induced the formation of a surface micro-nano rough structure. This specific topography, combined with the low surface energy of polysiloxane, resulted in superhydrophobicity. The optimal formulation was determined through orthogonal experimental design. Under the conditions of 20 wt% epoxy resin content, a vinyl-to-active hydrogen ratio of 1:2, and hydrosilylation reaction parameters of 85&#xa0;°C for 4&#xa0;h, the microspheres exhibited superior hydrophobicity and surface morphology, achieving a water contact angle of 154.2°. They were incorporated into a polydimethylsiloxane (PDMS) matrix to fabricate light diffusion materials. The composite with 5 wt% loading exhibited an excellent balance of optical properties, achieving a high light transmittance of 82.4% and a high haze of 90.8% (&gt; 770% increase compared to pure PDMS). Additionally, the composite surface maintained a hydrophobic state (WCA of 128.9°). These findings demonstrate the potential of these bifunctional microspheres in self-cleaning LED lighting applications.</p>

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Epoxy resin-modified polysiloxane microspheres with dual-functionality: superhydrophobicity and high-haze light diffusion

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • Haipeng Zou,
  • Ting He,
  • Xinmei Yan,
  • Zichen Zhang,
  • Guanghao Chen,
  • Yan Jiang,
  • Hongwen Zhang

摘要

In this paper, amino-terminated polymethylvinylsiloxane was synthesized via anionic ring-opening polymerization using Octamethylcyclotetrasiloxane (D4), 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinyl cyclotetrasiloxane (D4V), 1, 3-Bis (3-aminopropyl) -1, 1, 3, 3 tetramethyldisiloxane (AT) as precursors, followed by modification with epoxy resin. Subsequently, a hydrosilylation reaction with hydrogen-containing silicone oil was conducted. This process produced microspheres where the epoxy modification and crosslinking induced the formation of a surface micro-nano rough structure. This specific topography, combined with the low surface energy of polysiloxane, resulted in superhydrophobicity. The optimal formulation was determined through orthogonal experimental design. Under the conditions of 20 wt% epoxy resin content, a vinyl-to-active hydrogen ratio of 1:2, and hydrosilylation reaction parameters of 85 °C for 4 h, the microspheres exhibited superior hydrophobicity and surface morphology, achieving a water contact angle of 154.2°. They were incorporated into a polydimethylsiloxane (PDMS) matrix to fabricate light diffusion materials. The composite with 5 wt% loading exhibited an excellent balance of optical properties, achieving a high light transmittance of 82.4% and a high haze of 90.8% (> 770% increase compared to pure PDMS). Additionally, the composite surface maintained a hydrophobic state (WCA of 128.9°). These findings demonstrate the potential of these bifunctional microspheres in self-cleaning LED lighting applications.