Journal
PROCESSES
Volume 9, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/pr9091638
Keywords
CO2-responsive; polymer; multiwall carbon nanotube (MWCNT); composite; ATRP
Categories
Funding
- Innovative Research Team of Taizhou Polytechnic College [TZYTD-16-4]
- Excellent Young Teachers of Jiangsu Blue Project, from Taizhou Science and Technology Support Program [TN202012]
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A CO2-responsive composite of MWCNT-PDA-PDMAEMA has been prepared, which can undergo a reaction under CO2 action, leading to the separation of nanotube bundles. This process can be reversed by removing CO2.
A CO2-responsive composite of multiwall carbon nanotube (MWCNT) coated with polydopamine (PDA) and polydimethylamino-ethyl methacrylate (PDMAEMA) was prepared. The PDA was first self-polymerized on the surface of carbon nanotube. 2-bromoisobutyryl bromide (BiBB) was then immobilized by PDA and then initiated the ATRP of DMAEMA on the carbon nanotube surface. The resulting composite was characterized by Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The CO2-responsive test was performed by bubbling CO2 into the mixture of MWCNT-PDA-PDMAEMA composite in water. A well-dispersed solution was obtained and the UV-Vis transmittance decreased dramatically. This is attributed to the reaction between PDMAEMA and CO2. The formation of ammonium bicarbonates on the surface of carbon nanotubes leads to the separation of nanotube bundles. This process can be reversed as the removal of CO2 by bubbling N-2.
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