Nanostructured coatings for super hydrophobic textiles

Bulletin of materials science

S Parmar¹  A Bhattacharyya¹  M Joshi¹  N Agarwal¹ 

[1] Department of Textile Technology, Indian Institute of Technology, Delhi 110 076, India$$Department of Textile Technology, Indian Institute of Technology, Delhi 110 076, IndiaDepartment of Textile Technology, Indian Institute of Technology, Delhi 110 076, India$$

关键词: Super hydrophobic;    nanocomposite coating;    layerâ€�?�byâ€�?�layer;    nanoclay;    nanosilica.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The promising aspects of nanocomposite coatings to mimic the nano roughened self cleaning surface of lotus leaf is explored in this paper. A detailed study on nanosilica and clay based nanocomposite coatings using dip coating and layer by layer self assembly (L�?�b�?�L) is being described where lotus leaf effect has been mimicked on the cotton fabric surface using these particles as they develop nanosized surface roughness which helps to produce a super-hydrophobic surface. Nanosilica performs better in creating nano roughness on cotton fabric wherein the contact angle is >150°. The water contact angle of 2 wt% fluoro emulsion (Nuva HPU) treated cotton fabric increases from 115° to 155° when the fabric is pretreated with 0.5 wt% nanosilica emulsion. The water repellency rating of fabric treated with 0.16 wt% nanosilica along with 2 wt% Nuva HPU is comparable to that of 4 wt% Nuva HPU treated cotton fabric. On the other hand, 40 bilayers of nanosilica need to be applied on cotton fabric surface through L�?�b�?�L technique to create uniform nano roughening and gives a water repellency rating of 4. The air permeability of L�?�b�?�L nanocoated cotton fabric is not adversely affected by the super-hydrophobic nanostructured coating.

【 授权许可】

Unknown