Preparation of isocyanate-free composite coating with controlled molecular architecture: A new convergent approach to functional macromolecules
Document Type
Article
Publication Date
2-1-2021
Abstract
Isocyanate-free composite coating can improve radiative cooling, energy storage and harvesting applications. This study reports the development and use of a isocyanate-free green surface coating(GSC) matrix derived from (2,2,6,6-tetramethylpiperidin-1-yl)oxy radical (TEMPO)-oxidized cellulose-(3-Aminopropyl)trimethoxysilane (APTMS)-ZnO nanoparticles-green polymer matrix that possesses upto similar to 220 degrees C thermal stability. The GSC exhibited excellent UV block and IR active capacity while achieving good coating hardness. The NMR, TGA-DTG and Pencil hardness studies revealed that this attribute by GSC was due to the formation of uniform crosslinking and reinforcement network. Using electrochemical impedance spectroscopy, the GSC had a low resistance. A high charge transfer resistance of similar to 15.826 k Omega was measured using electrochemical impedance spectroscopy for the GSC, high enough to attenuate photon radiation, making GSC material stable for application. Also, UV-weathering study was performed to investigate coating stability of the GSC. This is the first time application of TEMPO-cellulose based reinforcement of the green polymer matrix for the development of GSC through convergent approach to functional macromolecules. The study opens an opportunity of utilizing green material in energy applications, especially in windows shielding by a sufficient attenuation of photon radiations.
Keywords
Isocyanate-free composite coating, Functional macromolecules, Photon attenuation, Thermal stability, UV block and IR active
Divisions
sch_che
Funders
Universiti Malaya [PG159-2016A],Universiti Malaya [IIRG 007B-19IISS],Universiti Malaya [ST007-2019]
Publication Title
Progress in Organic Coatings
Volume
151
Publisher
Elsevier
Publisher Location
PO BOX 564, 1001 LAUSANNE, SWITZERLAND