Synthesis of Self-Healing Thermosetting Resin Based Capsules and their Related Complexities

Abstract:

Microencapsulation forms an integral part in synthesizing bioinspired materials. This paper focuses on elaborating the problems faced in encapsulation of DGEBA microcapsules in PMMA and urea formaldehyde shell wall. The preparation process and the process parameters affecting the microcapsule property are discussed. The difference between the microcapsules prepared using emulsion polymerization and that by solvent evaporation has been discussed. The size, shape and morphology of the microcapsules was characterized using FESEM technique. It was observed that the agglomeration of the microcapsules can be prevented by changing the concentration of the emulsifier. However, in case of urea formaldehyde encapsulation chunks of pre-polymer resulted in agglomeration of the nanosized capsules even if higher concentration of emulsifier was implemented.

• Periodical: Advanced Materials Research (Volume 1119)
• Pages: 428-432
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1119.428
• Online since: July 2015
• Authors: Ikbal Choudhury*, Sudipta Halder, Abhinav Mathur, Writuparna Nath, Aniruddha Phukan
• Keywords: Encapsulation, FESEM, Self-Healing Capsules, Thermosetting Resin

References

[1] E. N. Brown, M. R. Kessler, N. R. Sottos and S. R. White, In situ poly(urea-formaldyhyde) microencapsulation of dicyclopentadine, Journal of Microencapsulation, Nov-Dec, 2003(20): pp.719-730.

DOI: 10.1080/0265204031000154160

[2] E. N. Brown, S. R. White, N. R. Sottos. Fracture testing of a self-healing polymer composite. Exp Mech 42(4): p.372–379. (2002).

DOI: 10.1007/bf02412141

[3] E. N. Brown. Fracture and fatigue of a self-healing polymer composite material. PhD thesis, Department of Theoretical and Applied Mechanics, University of Illinois Urbana-Champaign. (2003).

[4] E. N. Brown, S. R. White, N.R. Sottos, Retardation and repair of fatigue cracks in a microcapsule toughened epoxy composite. Part 2: in-situ healing. Compos Sci Technol 65(15-16): 2474–2480. (2005).

DOI: 10.1016/j.compscitech.2005.04.053

[5] E. N. Brown, S. R. White, N. R. Sottos, Fatigue crack propagation in microcapsule toughened epoxy. J Mat Sci (in press) (2006).

DOI: 10.1007/s10853-006-0512-y

[6] E. N. Brown, S. R. White, N. R. Sottos. Microcapsule induced toughening in a self-healing polymer composite. J Mat Sci 39: p.1703–1710. (2004).

DOI: 10.1023/b:jmsc.0000016173.73733.dc

[7] H. Jin, G. M. Miller, S. J. Pety, A. S. Griffin, D. S. Stradley, D. Roach, N. R. Sottos, S. R. White, Fracture behavior of a self-healing, toughened epoxy adhesive, International Journal of Adhesion and Adhesives, 44. 2013. pp.157-165.

DOI: 10.1016/j.ijadhadh.2013.02.015

[8] B.J. Blaiszik, N. R. Sottos, S. R. White. Nanocapsules for self-healing materials. Composites Science and Technology 68. p.978–986 (2008).

DOI: 10.1016/j.compscitech.2007.07.021

[9] A. A. Rzeszutko, E. N. Brown, N. R. Sottos, Tensile Properties of Self-Healing Epoxy. (2006).

[10] M.W. Keller, N.R. Sottos, Effect of microcapsule properties on self-healing composite performance. In: Proceedings of the 2004 SEM X International Congress on Experimental and Applied Mechanics. (2004).

[11] Q. Li, A. K. Mishra, N. H. Kim, T. Kuila, K.T. Lau, J.H. Lee, Effects of processing conditions of poly(methylmethacrylate) encapsulated liquid curing agent on the properties of self-healing composites. Composites: Part B 49. p.6–15, (2013).

DOI: 10.1016/j.compositesb.2013.01.011

[12] Q. Li, Siddaramaiah., N. H. Kim, D. Hui, J.H. Lee. Effects of dual component microcapsules of resin and curing agent on the self-healing efficiency of epoxy. Composites: Part B 55 79–85, (2013).

DOI: 10.1016/j.compositesb.2013.06.006