3. Using carbon nanotubes

Artificial lotus leaf structures were fabricated on textiles via the controlled assembly of carbon nanotubes. Carbon nanotubes (CNTs) and surface modified carbon nanotubes (PBA-g-CNTs) are used as building blocks to biomimic the surface microstructures of lotus leaves at the nanoscale. Cotton fabrics, which otherwise have perfect water absorbabilities, have been endowed with super-hydrophobic propertieswater contact angles greater than 150 were measured. The method provides a bionic route to create hydrophobic textiles. Furthermore, considering the novel mechanical and electric properties of carbon nanotubes, these carbon nanotubes coated cotton fabrics will find potential application in sensing, conducting and special textiles.

TREATED COTTON FABRIC

4. Using Metal oxide colloidal:

The fabric is dipped and processed in metal oxide colloidal solution and then is through heat treatment so as to make the fabrics with surface roughness on nanometer scale. Then through water repellent treatment, the fabrics has surface with water contact angle above 150.degree.