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<p>Cotton fabric is widely used in household and industrial fields due to its softness, comfort, renewability, and low cost. However, its intrinsic hydrophilicity and susceptibility to contamination limits its broader application. In this study, an epoxy resin/silica/polydimethylsiloxane (EP@SiO<sub>2</sub>/PDMS) composite coating was fabricated on the fabric cotton by a simple immersion method, endowing the cotton matrix self-cleaning superhydrophobic property. Silica nanoparticles were combined with a small amount of EP to provide appropriate surface roughness, while the outermost PDMS coating was applied to enhance hydrophobicity. The results showed that the prepared EP@SiO<sub>2</sub>/PDMS-coated cotton fabric achieved an average contact angle of 152.8°, demonstrating excellent self-cleaning property. Thanks to the dual-layer coating structure, the EP@SiO<sub>2</sub>/PDMS-coated cotton fabric exhibited remarkable environmental stability. It maintained its superhydrophobicity even after 60&#xa0;min of ultrasonic treatment. After 100 abrasion cycles, the contact angle of the fabric remained at 137.9°, indicating strong hydrophobicity. Additionally, the EP@SiO<sub>2</sub>/PDMS-coated cotton fabric demonstrated improved thermal stability and strong chemical stability. The EP@SiO<sub>2</sub>/PDMS-coated cotton fabric retained its superhydrophobicity after being soaked in various organic solvents for 24&#xa0;h and remained its water contact angles above 148° after being immersed in acidic, alkaline, and salt solutions for 6&#xa0;h. The superhydrophobic coating developed in this study is robust, durable, environmentally friendly, and simple to be prepared, showing promising potential for applications in the textile industry.</p>

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Facile Preparation of Robust Superhydrophobic EP@SiO2/PDMS-Coated Cotton Fabric with Self-cleaning Property and Environmental Stability

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Qiaoyu Yu,
  • Guanzhu Yu,
  • Yi Xiao,
  • Jianda Xie,
  • Xi Chen,
  • Kun Wu,
  • Jianhong Chen

摘要

Cotton fabric is widely used in household and industrial fields due to its softness, comfort, renewability, and low cost. However, its intrinsic hydrophilicity and susceptibility to contamination limits its broader application. In this study, an epoxy resin/silica/polydimethylsiloxane (EP@SiO2/PDMS) composite coating was fabricated on the fabric cotton by a simple immersion method, endowing the cotton matrix self-cleaning superhydrophobic property. Silica nanoparticles were combined with a small amount of EP to provide appropriate surface roughness, while the outermost PDMS coating was applied to enhance hydrophobicity. The results showed that the prepared EP@SiO2/PDMS-coated cotton fabric achieved an average contact angle of 152.8°, demonstrating excellent self-cleaning property. Thanks to the dual-layer coating structure, the EP@SiO2/PDMS-coated cotton fabric exhibited remarkable environmental stability. It maintained its superhydrophobicity even after 60 min of ultrasonic treatment. After 100 abrasion cycles, the contact angle of the fabric remained at 137.9°, indicating strong hydrophobicity. Additionally, the EP@SiO2/PDMS-coated cotton fabric demonstrated improved thermal stability and strong chemical stability. The EP@SiO2/PDMS-coated cotton fabric retained its superhydrophobicity after being soaked in various organic solvents for 24 h and remained its water contact angles above 148° after being immersed in acidic, alkaline, and salt solutions for 6 h. The superhydrophobic coating developed in this study is robust, durable, environmentally friendly, and simple to be prepared, showing promising potential for applications in the textile industry.