Preparation and Performance of SiO2/PMMA Superhydrophobic Transparent Composite Coatings

doi:10.7503/cjcu20250346

Abstract

Abstract:

Through dip-coating technology， a series of composite coatings was fabricated by adjusting the concentration parameters of nano-SiO₂ particles， PMMA， and dichloromethane（CH₂Cl₂） solvent. Systematic characterization using the contact angle measurements and the UV-Vis spectrophotometry revealed that the material achieved optimal performance balance of superhydrophobicity and transparency at a nanoparticle concentration of 6.25 g/L， exhibiting a static contact angle of （160.8±1.1）° and a transparency exceeding 90% at 550 nm. Mechanistic analysis revealed that the hierarchical micro-nano structures formed by nanoparticles at this concentration synergistically interacted with the polymer matrix， concurrently generating the surface roughness for the superhydrophobic Cassie-Baxter state while preventing Mie scattering effects to preserve the high transparency typically compromised by excessive particles. This research highlights advantages such as the availability of raw materials， straightforward processing， and low manufacturing costs， demonstrating promising self-cleaning potential and broad application prospects in the protection of optical device surfaces and the self-cleaning of photovoltaic modules.

Key words: Superhydrophobicity, Transparency, SiO₂/PMMA composite coating, Self-cleaning

CLC Number:

O647

TrendMD:

NIE Chuanqi, DONG Fuyao, GUO Ziwei, CHENG Long, YANG Nailiang, LIU Kesong, YU Cunming, JIANG Lei. Preparation and Performance of SiO₂/PMMA Superhydrophobic Transparent Composite Coatings[J]. Chem. J. Chinese Universities, 2026, 47(1): 20250346.

Figures/Tables 7

Fig.5 Water contact angle variation of SiO2/PMMA coatings on glass and PET substrates over time in a solution of 0.1 mol/L NaCl

References 28

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Preparation and Performance of SiO₂/PMMA Superhydrophobic Transparent Composite Coatings

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