The Effect of Environmental Conditions on the Electrical Performance of Polypyrrole.

Terpstra, Anton (2024) The Effect of Environmental Conditions on the Electrical Performance of Polypyrrole. Bachelor's Thesis, Chemical Engineering.

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Abstract

Polypyrrole (PPy) is a conductive polymer known for its high conductivity, environmental stability, and biocompatibility. This study examines the effects of environmental conditions on the performance of oCVD PPy thin films, focusing on their application as pH sensors and supercapacitors. It was found that pH affects the optical band gap of PPy films, with higher pH leading to deprotonation and fewer bipolarons and polarons. Thicker films showed lower optical band gaps due to fewer surface imperfections. For pH sensors, a thin film (~100nm) with a reaction ratio of 0.2 was ideal. Supercapacitor performance was influenced by electrolyte solutions, reactor position, and nitrogen patch flow. KCl and HCl treatments affected wetting properties and conductivity, while KOH treatments were unsuitable due to surface imperfections. Long-term stability studies indicated band gap decreases over time, suggesting rearrangement of polarons to bipolarons. This research highlights the importance of environmental factors on PPy film properties.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Bose, R.K.
Degree programme:	Chemical Engineering
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	21 Jun 2024 08:57
Last Modified:	21 Jun 2024 08:57
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/32719

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