Encapsulation of a coconut oil-based alkyd resin into styrene acrylonitrile (SAN) shell via coaxial electrospray method for self-healing purposes
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1department of chemical engineering, Isfahan University of technology, Isfahan, 84156-831111, Iran
2Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
3Department of Materials and Polymer Engineering, Faculty of Engineering, Hakim Sabzevari University, Sabzevar, 9617976487, Iran
In this study, a coconut oil-based alkyd resin was encapsulated into styrene acrylonitrile copolymer (SAN) as shell material using the coaxial electrospray method. Chemical structure, size distribution and surface morphology of capsules were characterized by Fourier transform infrared (FTIR) spectroscopy, and field emission scanning electron microscopy (FE-SEM), respectively. In addition, Thermal stability of the prepared capsules was studied by thermogravimetric analysis (TGA). FTIR test results proved no reaction between core and shell during the encapsulation. Morphological studies showed the rough surface of capsules and electrosprayed capsules' mean diameter was about 700 nm which was obtained through FE-SEM micrograph and ImageJ software. The TGA results confirmed the presence of two components in the prepared capsules and the prepared capsules showed thermal stability up to 300 ˚C.