ABSTRACT Self-bursting microcapsules, which retain their shape when suspended in water but burst quickly after the water evaporates, were proposed in a previous report. In this report, the effect of core materials on the bursting mechanism was studied. Five kinds of solvents were used as core materials, microencapsulated with polyurethane via an interfacial polymerization method. It was found that the self-bursting ratio was proportional to the measured dielectric constant of the core material. Thus, the solvents with a higher dielectric constant had an effect on the wall material to a greater extent. Furthermore, the self-bursting ratio was able to be predicted using the “organic conceptual diagram.”
Cite this paper
nullN. Tsuda, T. Ohtsubo and M. Fuji, "Effect of Core Material on Breaking Behavior of Self-Bursting Microcapsules," Journal of Encapsulation and Adsorption Sciences, Vol. 1 No. 4, 2011, pp. 51-56. doi: 10.4236/jeas.2011.14007.
 K. Miyata and Y. Nakahara, “The Preparation of Inorganic Particles by Interfacial Reaction,” Progress in Organic Coatings, Vol. 5, No. 2, 1977, pp. 115-129.
G. Hadiko, H. Y. Sheng, M. Fuji and M. Takahashi, “Synthesis of Hollow Calcium Carbonate Particles by the Bubble Templating Method,” Materials Letters, Vol. 59, No. 29-30, 2005, pp. 2519-2522.
J. Heidi and B. S. Ruth, “Preparation of Polyurethane Nanocapsules by Miniemulsion Polyaddition,” Journal of Microencapsulation, Vol. 24, 2007, pp. 731-742.
N. Yan, P. Ni and M. Zhang, “Preparation and Properties of Polyurea Microcapsules with Non-Ionic Surfactant as Emulsifier,” Journal of Microencapsulation, Vol. 10, No. 3, 1993, pp. 375-383. doi:10.3109/02652049309031527
H. B. Scher, “Microencapsulation of Pesticide by Interfacial Polymerization: Process and Performance Consideration,” Pesticide Chemistry-Human Welfare and Environment, Vol. 4, 1983, pp. 295-300.
M. Cakhshaee, R. A. Pethrick, H. Rashid and D. C. Sherrington, Polymer Communications, Vol. 26, 1985, pp. 185-192.
H. Y. Lee, S. J. Lee, I. W. Cheong and J. H. Kim, “Microencapsulation of Fragrant Oil via in Situ Polymerization: Effects of pH and Melamine-Formaldehyde Molar Ratio,” Journal of Microencapsulation, Vol. 19, No. 5, 2002, pp. 559-569. doi:10.1080/02652040210140472
H. Kage, H. Kawahara, N. Hamada, T. Kotaka and H. Ogura, “Operating Conditions and Microcapsules Generated by in Situ Polymerization,” Advances in Powder Technology, Vol. 13, No. 3, 2002, pp. 265-285.
H. G. Bungenberg de Jong and H. R. Kruyt, “Colloid Science,” Elsevier, Amsterdam, 1949, pp. 232-258.
S. K. Ghosh, “Functional Coatings and Microencapsulation: A General Perspective,” In: S. K. Ghosh, Ed., Functional coatings: by polymer microencapsulation, Wiley-VCH, Verlag GmbH & Co. KgaA, Weinheim, 2006, pp. 1-28.
T. Ohtsubo, S. Tsuda and K. Tsuji, “A Study of the Physical Strength of Fenitrothion Microcapsules,” Polymer, Vol. 32, No. 2, 1991, pp. 2395-2399.
H. Shang-Hsiu, T. Chia-Hui, L. Chen-Fu, L. Dean-Mo and C. San-Yuan, “Controlled Rupture of Magnetic Polyelectrolyte Microcapsules for Drug Delivery,” Langmuir, Vol. 24, No. 20, 2008, pp. 11811-11818.
G. Bruno, M. Michael, D. Jo, S. Stefaan and H. Wim, “Microcapsules Ejecting Nanosized Species into the Environment,” J. A. C. S. Communications, Vol. 130, 2008, pp. 14480-14482. doi:10.1021/ja806574h
B. Matthieu, G. Bruno, M. Helmuth, S. Gleb and S. Andre, “Direction Specific Release from Giant Microgel-Templated Polyelectrolyte Microcontainers,” Soft Matter, Vol. 5, 2009, pp. 3927-3931.
L. Li, W. Wei, J. Xiao-Jie, X. Rui and C. Liang-Yin, “Smart Thermo-Triggered Squirting Capsules for Nano-particle Delivery,” Soft Matter, Vol. 6, 2010, pp. 3759-3763. doi:10.1039/c002231d
N. Tsuda and T. Ohtsubo, “Study on the Breaking Behavior of a Microcapsule,” 17th International Symposium on Microencapsulation, Nagoya, September 2009, p. 7.
D. J. David and H. B. Staley, “Analytical Chemistry of the Polyurethanes,” Kreiger, Huntington, 1969, pp. 170-245.
A. Fujita, “Prediction of Organic Compounds by Conceptional Diagram,” Chemical & Pharmaceutical Bulletin, Vol. 2, No. 2, 1954, pp. 163-173.
K. Yoshio, S. Sato, Y. Honma, “Shinban Yukigainenezu kisotoouyo,” Sankyosyupan, 2008.
R. Oda, “Senryo kagaku,” Kyourituzensho, 1954.