Abstract
Abstract In the present study, a coconut oil-based alkyd resin was successfully encapsulated into poly (melamine-urea-formaldehyde) (PMUF) as shell material using sodium dodecyl benzene sulfonate (SDBS) as an emulsifier. The influence of encapsulation processing conditions such as melamine resin/urea (M/U) ratio, initial pH value of medium and mechanical agitation rate on encapsulation yield and core content were studied. Chemical structure, thermal stability, size distribution and surface morphology of microcapsules were characterized by Fourier transform infrared (FTIR) spectroscopy, optical and scanning electron microscopy (SEM), and thermal gravimetric analysis (TGA) respectively. The produced microcapsules at optimum processing condition were white and free-flowing spherical particles. The encapsulation yield and core content of synthesized microcapsules were controlled by selecting various processing condition. The rough outer surface of microcapsules was agglomerated PMUF nanoparticles which would provide better adhesion to matrix.
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