Journal of Coatings Technology and Research

, Volume 15, Issue 5, pp 1157–1165 | Cite as

Shaping characteristics in alginate hydrogel encapsulation via a two-fluid spraying method

  • Baekhoon Seong
  • Jihoon Kim
  • Sejin Jung
  • Giho Kang
  • Jinkee Lee
  • Doyoung Byun
  • Kwang-Soo Lee
  • Hyung-Seok Jang
  • Jin Hwan Ko


Recently, an alginate hydrogel containing amphiphilic liposomes was suggested for application to an antifouling coating. In this study, we investigate the shaping characteristics of the alginate hydrogel by a spraying method for application to the coating. Sodium alginate droplets from the spraying nozzle are known to be differently shaped by several external forces during the encapsulation process when such a droplet impacts onto the surfaces of liquid containing calcium ions. We adopted a two-fluid spraying method for fast alginate droplets with a scalable size suitable for mass production. Various shapes, such as mushroom, petal, sphere, and thin-sheet alginate hydrogel shapes containing liposomes, were obtained via this experimental approach. Supported by a theoretical analysis, we determined regimes for the various shapes depending on the droplet size and the concentration of the sodium alginate solution. Alginate hydrogel of different shapes based on the regimes will be used for the coating throughout a different post-processing.


Spraying Hydrogel encapsulation Shaping Coating 



This research was a part of the project entitled the “Development of active controlled tidal current generation technology” funded by the Ministry of Oceans and Fisheries of Korea (20110171).

Supplementary material

11998_2018_60_MOESM1_ESM.docx (737 kb)
Supplementary material 1 (DOCX 737 kb)


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  1. 1.Coastal and Environmental Engineering DivisionKorea Institute of Ocean Science and Technology (KIOST)Ansan, Sangnok-guRepublic of Korea
  2. 2.School of Mechanical EngineeringSungkyunkwan UniversitySuwonRepublic of Korea
  3. 3.Department of Mechanical Engineering, Berkeley Sensor and Actuator CenterUniversity of California BerkeleyBerkeleyUSA
  4. 4.Mechanical EngineeringJeju National UniversityJeju-siRepublic of Korea

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