Cellulose Acetate–Poly(N-isopropylacrylamide)-Based Functional Surfaces with Temperature-Triggered Switchable Wettability

V. Anand Ganesh, Anupama Sargur Ranganath, Radhakrishnan Sridhar, Hemant Kumar Raut, Sundaramurthy Jayaraman, Rahul Sahay, Seeram Ramakrishna, Avinash Baji
First published: 12 May 2015Full publication history
DOI: 10.1002/marc.201500037

Abstract

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Temperature-triggered switchable nanofibrous membranes are successfully fabricated from a mixture of cellulose acetate (CA) and poly(N-isopropylacrylamide) (PNIPAM) by employing a single-step direct electrospinning process. These hybrid CA-PNIPAM membranes demonstrate the ability to switch between two wetting states viz. superhydrophilic to highly hydrophobic states upon increasing the temperature. At room temperature (23 °C) CA-PNIPAM nanofibrous membranes exhibit superhydrophilicity, while at elevated temperature (40 °C) the membranes demonstrate hydrophobicity with a static water contact angle greater than 130°. Furthermore, the results here demonstrate that the degree of hydrophobicity of the membranes can be controlled by adjusting the ratio of PNIPAM in the CA-PNIPAM mixture.

http://onlinelibrary.wiley.com/doi/10.1002/marc.201500037/abstract?userIsAuthenticated=false&deniedAccessCustomisedMessage

 

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