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Mechanically robust PMMA‑based colloidal photonic crystals for high colorfastness textile coloration
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DOI：10.1016/j.colsurfa.2026.141487.png)
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Abstract
En 中文
Photonic crystal (PC) structurally colored materials attract increasing attention in biomimetic textile coloration due to their unique optical modulation features and brilliant structural colors. Poly(methyl methacrylate) (PMMA) colloidal PCs are widely studied because of their good biocompatibility, environmental stability, and natural degradability. The PCs constructed from hard PMMA nanospheres typically exhibit poor structural stability, limiting their practical application in textile coloration. To address this limitation, methyl methacrylate (MMA) was copolymerized with a polar-group-containing monomer, methacrylic acid (MAA), as well as five different soft monomers: ethyl acrylate (EA), butyl acrylate (BA), 2-ethylhexyl acrylate (2EHA), butyl methacrylate (BMA), and tert-butyl acrylate (TBA). The impacts of the chemical structure and comonomer ratio on the resultant copolymer nanosphere morphology, glass transition temperature ( Tg ), optical properties, and assembled PC structural stability were systematically investigated. Soft monomer copolymerization significantly lowers the Tg of the nanosphere shell, allowing thermally induced surface fusion to effectively enhance PC structural stability. Among the evaluated systems, P(MMA-TBA) nanospheres (with a mass ratio ωMMA:ωTBA=2:1 ) exhibit good sphericity and excellent adhesion. These properties yield high structural stability and high color saturation after curing at 90 ℃ for 6 min on textile substrates. Large-scale and patterned PC structurally colored fabrics are achieved using shear-induced assembly and screen printing, respectively. The resulting fabrics display bright structural colors with a pronounced iridescent effect, alongside excellent resistance to washing, rubbing, and acidic/alkaline conditions.
Keywords:
PMMA‑based nanosphere
Colloidal photonic crystals
High colorfastness
Structural stability
Textile coloration
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