Effect of agitation rate and reaction temperature on the size of linseed oil microcapsule self-healing

Muhamad Nor, Nor Amalina (2016) Effect of agitation rate and reaction temperature on the size of linseed oil microcapsule self-healing. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This research involves studying the effect of various agitation rate and reaction temperature on the Linseed oil microcapsule size. There are several studies discussed about the effect of various agitation rate and reaction temperature on Linseed oil microcapsule attributes. In the in situ polymerization, Linseed oil-Poly urea formaldehyde are used as a core and shell material to produce microcapsule self-healing coating. The ideal capsule size using in paint application are in range of 200 μm to 150 μm for easily dispersed in paint matrix. The selected parameter on agitation rate and reaction temperature will determined the capsule particle size. From previous research, the higher the agitation rate, the finer capsules. But too vigorous speed also may contribute to unstable emulsion and irregular shape of capsule. The correct choice of temperature also will effect the particle size. The agitation rate parameter used to synthesized microcapsule is 200, 250, 300, 350 and 400 rpm while the temperature parameter used is 50 º C, 60º C and 70º C. It was found that the reduction of dimension microcapsules are successful as increasing the agitation rate and reaction temperature. Nevertheless, the agitation rate and reaction temperature are limited to certain points which is the capsule were not formed. Besides, it was also observed the structure of microcapsule when manipulate the variables. In a nutshell, the dimension of microcapsules are reduced when increasing agitation rate and reaction temperature.

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