Nanocellulose-based liquid dispersion that renders the coated surface extremely water repellent — superhydrophobic with water contact angle more than 160 degrees — has been developed by a team of researchers led by Prof. T. Pradeep from the Department of Chemistry at the Indian Institute of Technology (IIT) Madras.
The material can be coated on a variety of surfaces including glass and paper. It has several distinct properties such as high mechanical durability and chemical stability. Like other superhydrophobic materials, the dispersion-coated surface exhibits microbial resistance thus preventing biofouling.
The researchers used cellulose nanofibres (5-20 nm wide and more than 500 nm in length) and functionalised them with flurosilane in water over six-seven hours at room temperature. The linkage of fluorosilane with cellulose happens through the hydroxyl groups present on...Read more
Source web page:The Hindu