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<p>Super-hydrophilic coatings offer a highly effective strategy for self-cleaning, as they cause water to spread into a thin film that efficiently washes away surface contaminants. This study reports the development and assessment of a multifunctional super-hydrophilic, antireflective, and self-cleaning thin-film composite coating designed to maximize solar energy generation and mitigate the challenges associated with glass panels on high-rise buildings. The coating is based on a combination of dendritic silica nanoparticles (DSNs) and spherical silica nanoparticles (SSNs), with the DSNs synthesized using Pluronic F-127 as a structure-directing agent. Morphological analysis revealed a uniform, crack-free coating with well-distributed nanopores. The optimized coating exhibited a water contact angle as low as ~ 3° and a high optical transmittance of ~ 96%. In addition, the coating demonstrated good antifogging properties and facilitated the effective removal of surface contaminants. The film showed robust durability, maintaining a WCA of 24° and 92.1% transmittance after four abrasion cycles in sand impact test. Environmental durability was conducted through accelerated UV exposure for 16&#xa0;days, as per IEC 61215 standards. The results revealed minimal degradation, with the WCA remaining below 10° and transmittance maintaining greater than 94%. The coating also possesses strong mechanical robustness with a pencil hardness of 6H. Crucially, application of the SSN/DSN coating increased solar cell efficiency by 2.53%, underscoring its significant potential for improving renewable energy systems.</p>

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A robust antisoiling coating based on dendritic-spherical silica nanocomposites synthesized via a PF-127-directed method

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Yadav Narendra Kumar Rajbahadur,
  • Sushant Negi,
  • Simanchal Kar

摘要

Super-hydrophilic coatings offer a highly effective strategy for self-cleaning, as they cause water to spread into a thin film that efficiently washes away surface contaminants. This study reports the development and assessment of a multifunctional super-hydrophilic, antireflective, and self-cleaning thin-film composite coating designed to maximize solar energy generation and mitigate the challenges associated with glass panels on high-rise buildings. The coating is based on a combination of dendritic silica nanoparticles (DSNs) and spherical silica nanoparticles (SSNs), with the DSNs synthesized using Pluronic F-127 as a structure-directing agent. Morphological analysis revealed a uniform, crack-free coating with well-distributed nanopores. The optimized coating exhibited a water contact angle as low as ~ 3° and a high optical transmittance of ~ 96%. In addition, the coating demonstrated good antifogging properties and facilitated the effective removal of surface contaminants. The film showed robust durability, maintaining a WCA of 24° and 92.1% transmittance after four abrasion cycles in sand impact test. Environmental durability was conducted through accelerated UV exposure for 16 days, as per IEC 61215 standards. The results revealed minimal degradation, with the WCA remaining below 10° and transmittance maintaining greater than 94%. The coating also possesses strong mechanical robustness with a pencil hardness of 6H. Crucially, application of the SSN/DSN coating increased solar cell efficiency by 2.53%, underscoring its significant potential for improving renewable energy systems.