Journal of Sol-Gel Science and Technology

, Volume 58, Issue 1, pp 18–23 | Cite as

Preparation of durable superhydrophobic surface by sol–gel method with water glass and citric acid

  • Jinyun Liu
  • Wenqi Huang
  • Yanjun Xing
  • Rong Li
  • Jinjin Dai
Original Paper

Abstract

Durable superhydrophobic surface on cotton fabrics has been successfully prepared by sol–gel method. Cellulose fabric was first coated with silica sol prepared with water glass and citric acid as the acidic catalyst. The silica coated fabric was then padded with hydrolyzed hexadecyltrimethoxysilane afterwards obtaining low surface energy. Water contact angle and hydrostatic pressure were used to characterize superhydrophobicity and washing durability. Scanning electron microscopy was used to characterize the surface morphology changes after certain washing times. All results showed good durable hydrophobicity on cellulose fabrics. In addition, the influence of citric acid and sodium hypophosphite (NaH2PO2) on the durability of hydrophobicity was also investigated. The durability of treated cotton improved with the increase of concentration of citric acid in the presence of NaH2PO2. It could be concluded that citric acid acted as multi-functional heterogeneous grafting chemicals to improve washing durability of hydrophobicity by forming the ester bonds between cotton fabric and silica sol and improved the durability of hydrophobicity.

Keywords

Superhydrophobicity Durability Silica sol Citric acid Water glass 

Notes

Acknowledgments

The research was supported by Shanghai Natural Science Foundation (No. 10ZR1400500) and the Fundamental Research Funds for the Central Universities (No. 2009B03-3-01).

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Jinyun Liu
    • 1
  • Wenqi Huang
    • 1
  • Yanjun Xing
    • 1
    • 2
  • Rong Li
    • 3
  • Jinjin Dai
    • 1
  1. 1.College of Chemistry, Chemical Engineering and BiotechnologyDonghua UniversityShanghaiChina
  2. 2.Key Laboratory of Science & Technology of Eco-Textile, (Donghua University)Ministry of EducationShanghaiChina
  3. 3.National Engineering Research Center for Dyeing & Finishing of TextilesShanghaiChina

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