Editing Polypyrrole (section)

==Research trends==
PPy is a potential vehicle for [[drug delivery]]. The polymer matrix serves as a container for proteins.<ref>{{cite journal | last1 = Geetha | first1 = S. | last2 = Rao | first2 = Chepuri R.K. | last3 = Vijayan | first3 = M. | last4 = Trivedi | first4 = D.C. | year = 2006 | title = Biosensing and drug delivery by polypyrrole" "Molecular Electronics and Analytical Chemistry | journal = Analytica Chimica Acta | volume = 568 | issue = 1–2| pages = 119–125 | doi = 10.1016/j.aca.2005.10.011 | pmid = 17761251 }}</ref>

Polypyrrole has been investigated as a [[catalyst support]] for fuel cells<ref>{{cite journal|last1=Unni|first1=Sreekuttan M.|last2=Dhavale|first2=Vishal M.|last3=Pillai|first3=Vijayamohanan K.|last4=Kurungot|first4=Sreekumar|title=High Pt Utilization Electrodes for Polymer Electrolyte Membrane Fuel Cells by Dispersing Pt Particles Formed by a Preprecipitation Method on Carbon "Polished" with Polypyrrole|journal=The Journal of Physical Chemistry C|pages=14654–14661|year=2010|doi=10.1021/jp104664t|volume=114|issue=34}}</ref> and to sensitize cathode electrocatalysts.<ref>{{cite journal|last1=Olson|first1=Tim S.|last2=Pylypenko|first2=Svitlana|last3=Atanassov|first3=Plamen|last4=Asazawa|first4=Koichiro|last5=Yamada|first5=Koji|last6=Tanaka|first6=Hirohisa|title=Anion-Exchange Membrane Fuel Cells: Dual-Site Mechanism of Oxygen Reduction Reaction in Alkaline Media on Cobalt−Polypyrrole Electrocatalysts|journal=The Journal of Physical Chemistry C|volume=114|pages=5049–5059|year=2010|doi=10.1021/jp910572g|issue=11}}</ref>

Together with other conjugated polymers such as polyaniline, poly(ethylenedioxythiophene) etc., polypyrrole has been studied as a material for "artificial muscles", a technology that offers advantages relative to traditional motor actuating elements.<ref>{{cite web |url=http://atmsp.whut.edu.cn/resource/pdf/4987.pdf |title=Archived copy |website=atmsp.whut.edu.cn |access-date=30 June 2022 |archive-url=https://web.archive.org/web/20111121003707/http://atmsp.whut.edu.cn/resource/pdf/4987.pdf |archive-date=21 November 2011 |url-status=dead}}</ref>

Polypyrrole was used to coat silica and reverse phase silica to yield a material capable of anion exchange and exhibiting hydrophobic interactions.<ref>{{cite journal | doi=10.1016/0021-9673(91)85003-X | volume=588 | issue=1–2 | title=High-performance liquid chromatography on polypyrrole-modified silica | journal=Journal of Chromatography A | pages=25–31| date=1991-12-27 | last1=Ge | first1=Hailin | last2=Wallace | first2=G.G. }}</ref>

Polypyrrole was used in the microwave fabrication of multiwalled carbon nanotubes, a rapid method to grow CNT's.<ref>pubs.rsc.org/en/content/articlelanding/2011/CC/C1CC13359D</ref>

A water-resistant polyurethane sponge coated with a thin layer of polypyrrole absorbs 20 times its weight in oil and is reusable.<ref>Chemical and Engineering News, 26June2013 "Greasy Sponge Slurps Up Oil" http://cen.acs.org/articles/91/web/2013/06/Greasy-Sponge-Slurps-Oil.html</ref>

The wet-spun polypyrrole fibre can be prepared chemical polymerization pyrrole and DEHS as dopant.<ref>{{cite journal | last1 = Foroughi | first1 = J. | display-authors = etal   | year = 2008 | title = Production of polypyrrole fibres by wet spinning | journal = Synthetic Metals | volume = 158 | issue = 3–4| pages = 104–107 | doi=10.1016/j.synthmet.2007.12.008}}</ref>