Size and core content optimization of epoxy nanocapsules by response surface methodology for use in self-healing coatings

作者：Khoee Sepideh^*; Payandeh Seyed Hosein; Jafarzadeh Parinaz; Asadi Hamed

来源：Smart Materials and Structures, 2016, 25(8): 084014.

DOI：10.1088/0964-1726/25/8/084014

• epoxy nanocapsule
• coating
• selfhealing
• corrosion
• response surface methodology
• amine capsule

A model is provided to estimate the effect of different factors on the synthesis of nanocapsules containing epoxy resin. Producing nanocapsules with different sizes and core-contents for different applications is made possible by using this model. The three parameters that have the most important effect on the properties of the nanocapsules: the surfactant concentration, agitation rate and sonication time are selected and the response surface methodology is used to determine the effect of these parameters on the nanocapsule size and core content. These parameters are modified to prepare nanoparticles with a high core content (68.7%) and small size (165 nm). The nanocapsules were stable up to 150 degrees C and these properties have made them applicable for future use in self-healing coatings and composites. The modified epoxy nanocapsules were mixed with amine-filled nanocapsules and were incorporated in an epoxy coating. This coating was scratched and kept in a corrosive environment and even after 30 days it still showed a high corrosion resistance, proving that the nanocapsules were able to successfully heal the scratches in the coating. After 30 days of immersion in 3.5 wt% NaCl environment, the corrosion resistance of the coating with healing particles was 38 times higher than the pure coating.

• 出版日期2016-8