Print Email Facebook Twitter The effect of processing parameters on the formation of epoxy/UF resin microcapsules Part of: ICSHM 2013: Proceedings of the 4th International Conference on Self-Healing Materials· list the conference papers Title The effect of processing parameters on the formation of epoxy/UF resin microcapsules Author Zhu, G. Wu, Z. Zhou, Y. Tang, J. Dong, B. Han, N. Xing, F. Date 2013-06-16 Abstract Epoxy E-51/UF resin microcapsules were prepared by traditional two-stepped in situ polymerization method and processing parameters affecting the final microcapsules shape and size were carefully studied in the aim to obtain microcapsule with ideally spherical shape and uniform size. Its found the polycarboxylate surfactant of SMA (styrene-maleic anhydride) is better than the monomolecule sulfate surfactant of SDBS (dodecylbenzenesulphonate) in the emulsification of Epoxy E-51, because the microcapsules from epoxy E-51/SMA emulsion possess good sphericity and clear surface. On the second step of reaction, U/F mole ratio should be controlled in 1.5~2:1 region, and ammonium chloride (NH4Cl) or m-dihydroxybenzene are strongly recommended to be added to strengthen the shell. For a higher encapsulation ratio, acidification time should be controlled in 2~3h and the end-point pH value of the curing reaction should be controlled at 2~2.5, respectively. The core/shell ratio (weight) is optimal at 2:1 and reaction temperature at 60-65°C. Subject microcapsuleepoxy,urea formaldehyde resinself-healing To reference this document use: http://resolver.tudelft.nl/uuid:38943d4a-6446-4f43-b41d-27f078e38bb2 Part of collection Conference proceedings Document type conference paper Rights (c) 2013 Zhu, G.; Wu, Z.; Zhou, Y.; Tang, J.; Dong, B.; Han, N.; Xing, F. Files PDF Zhu.pdf 569.5 KB Close viewer /islandora/object/uuid:38943d4a-6446-4f43-b41d-27f078e38bb2/datastream/OBJ/view