Polyaniline: Synthesis and Natural Nanocomposites

Maity, Palash Chandra (2016) Polyaniline: Synthesis and Natural Nanocomposites. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

Research and development in the field of conducting polymers can enable advancement in flexible electronics. Particularly polyaniline has been given importance due to stability, easy synthesis, reasonable conductivity and tunable properties by changing oxi dation states. We have presented a systematic study of effect polymerization time and temperature on polyaniline morphology and conductivity. It was noticed that with decrease in polymerization temperature and increase in polymerization duration, conducti vity of polyaniline increases. It was seen that particle size of polyaniline plays an important role in determining conductivity, irrespective of crystallinity, which suggests equal probability of electron conduction along and between the polyaniline chain s. The highest conductivity obtained was for 24 hours of polymerisation in temperature ( - 18 ̊ C). Conducting polymers including polyaniline possess poor mechanical properties. Cellulosic materials were chosen as substrate because of abundance, bio compatibility, biodegradability, and low cost. . Polyaniline was impregnated into corn cob cover by in sit u polymerization to prepare composite. The conductivity was measured to be 8×10 - 4 S/cm for 15 % of polyaniline in the sample. Bacterial cellulose was chosen as another substrate because of its purity, mechanical properties and tenability. Composites of poly aniline and bacterial cellulose were also made by in situ polymerization. Three types of bacterial celluloses with variation in microstructure and porosity were used. The best conductivity was found to be 2×10 - 3 S/cm for over 50% of polyaniline.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Thesis (Masters)
Uncontrolled Keywords: TD703
Subjects: Materials Engineering > Materials engineering
Materials Engineering > Nanostructured materials, porous materials
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 02 Sep 2016 06:19
Last Modified: 02 Sep 2016 06:19
URI: http://raiith.iith.ac.in/id/eprint/2718
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