Block Copolymer Derived Electrospun Mesoporous Nanofibers

Nathani, Akash (2016) Block Copolymer Derived Electrospun Mesoporous Nanofibers. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

In this study we have successfully demonstrated the synthesis of porous polymer / polymer derived carbon nanofibers from two block copolymer systems. In first case poly(styrene - block - methylmethacrylate) (PS - b - PMMA) of three different molecular weights were used to produce nanofibers with different morphologies. Various electrospinning parameters such as applied potential difference, distance between spinneret and co llector, flowrate and the concentration of polymer in an organic solvent we re optimized to get fine fibers. Fibers thus obtained were annealed to undergo a microphase separation followed by UV exposure treatment which causes crosslinking of one phase and at the same time degradation of another phase. The degraded phase was then etched out using a weak acid to obtain the desired porosity . The porous fibers thus obtained were characterized using field emission electron microscopy ( FESEM ) and fouri er transmission infrared spectroscopy ( FTIR ) . Wettability studies were also carried out for the different morphologies. In second case a blend of a homopolymer (polyacrylonitrile (PAN)) and a copolymer ( poly( a crylonitrile - block - methylmethacrylate) (PAN - b - P MMA )) was electrospun

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IITH Creators:
IITH CreatorsORCiD
Item Type: Thesis (Masters)
Uncontrolled Keywords: Mesoporous, PAN, Nanofibers, TD644
Subjects: Chemical Engineering > Biochemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 15 Sep 2016 06:49
Last Modified: 15 Sep 2016 06:49
URI: http://raiith.iith.ac.in/id/eprint/2758
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