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Smart Structures and Systems Volume 27, Number 6, June 2021 , pages 1001-1010 DOI: https://doi.org/10.12989/sss.2021.27.6.1001 |
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Effect of agitation speed on microencapsulation of healing agent in PMMA shell and study on the mechanical properties of epoxy/PMMA microcapsules |
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Ramin Jahadi, Hamid Beheshti, Mohammad Heidari-Rarani and Amir H. Navarchian
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| Abstract | ||
| In this study, the effect of agitation speed as a key process parameter on the morphology and particle size of epoxy-Poly (methyl methacrylate) (PMMA) microcapsules was investigated. Thus, a new interpretation is presented to relate between the microcapsule size to rotational speed so as to predict the particle size at different agitation speeds from the initial capsule size. The PMMA shell capsules containing EC 157 epoxy and hardener as healing materials were fabricated through the internal phase separation method. The process was performed at 600 and 1000 rpm mechanical mixing rates. Scanning electron microscopy (SEM) revealed the formation of spherical microcapsules with smooth surfaces. According to static light scattering (SLS) results, the average diameter size of the epoxy/PMMA capsules at two mixing rates were 7.49 and 5.11 | ||
| Key Words | ||
| self-healing; PMMA microencapsulation; epoxy composite; reinforcing properties | ||
| Address | ||
| (1) Ramin Jahadi, Hamid Beheshti, Mohammad Heidari-Rarani: Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, 81746-73441, I.R. Iran; (2) Amir H. Navarchian: Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, 81746-73441, I.R. Iran. | ||