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Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell

Sven RL Gobert, Marleen Segers, Stijn Luca (UGent) , Roberto FA Teixeira, Simon Kuhn, Leen Braeken and Leen CJ Thomassen
(2019) JOURNAL OF MICROENCAPSULATION. 36(4). p.371-384
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Abstract
Microencapsulation is almost exclusively performed in batch processes. With today's chemistry increasingly performed in flow reactors, this work aims to realise a continuous reactor setup for the encapsulation of an ester with a polyuria (PU) shell. The generation of an emulsion template is performed in a recirculation loop driven by a pump and equipped with static mixers, screen type and Kenics((R)). Calorimetric measurements are performed to characterise the energy dissipation rate inside the loop. The curing step is performed in a coiled tube reactor with two geometric configurations. Number based capsule size distributions are derived from micrograph analysis. Results indicate that the recycle pump is the main contributor to determine the capsule size distribution. A continuous setup is achieved for PU microcapsules containing hexyl acetate with a production rate of 198g/h dry capsules, and a mean capsule diameter of 13.3 mu m with a core content of 54wt%.
Keywords
Microencapsulation, flow reactor, static mixer, recirculation loop, energy dissipation rate, LIQUID-LIQUID DISPERSION, RESIDENCE TIME DISTRIBUTION, STATIC MIXERS, DROPLET FORMATION, FLOW, MICROCHANNEL, MEMBRANE, HYDRODYNAMICS, FORMULATION, BREAKAGE

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Citation

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MLA
Gobert, Sven RL, et al. “Development of a Continuous Reactor for Emulsion-Based Microencapsulation of Hexyl Acetate with a Polyuria Shell.” JOURNAL OF MICROENCAPSULATION, vol. 36, no. 4, 2019, pp. 371–84, doi:10.1080/02652048.2019.1633433.
APA
Gobert, S. R., Segers, M., Luca, S., Teixeira, R. F., Kuhn, S., Braeken, L., & Thomassen, L. C. (2019). Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell. JOURNAL OF MICROENCAPSULATION, 36(4), 371–384. https://doi.org/10.1080/02652048.2019.1633433
Chicago author-date
Gobert, Sven RL, Marleen Segers, Stijn Luca, Roberto FA Teixeira, Simon Kuhn, Leen Braeken, and Leen CJ Thomassen. 2019. “Development of a Continuous Reactor for Emulsion-Based Microencapsulation of Hexyl Acetate with a Polyuria Shell.” JOURNAL OF MICROENCAPSULATION 36 (4): 371–84. https://doi.org/10.1080/02652048.2019.1633433.
Chicago author-date (all authors)
Gobert, Sven RL, Marleen Segers, Stijn Luca, Roberto FA Teixeira, Simon Kuhn, Leen Braeken, and Leen CJ Thomassen. 2019. “Development of a Continuous Reactor for Emulsion-Based Microencapsulation of Hexyl Acetate with a Polyuria Shell.” JOURNAL OF MICROENCAPSULATION 36 (4): 371–384. doi:10.1080/02652048.2019.1633433.
Vancouver
1.
Gobert SR, Segers M, Luca S, Teixeira RF, Kuhn S, Braeken L, et al. Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell. JOURNAL OF MICROENCAPSULATION. 2019;36(4):371–84.
IEEE
[1]
S. R. Gobert et al., “Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell,” JOURNAL OF MICROENCAPSULATION, vol. 36, no. 4, pp. 371–384, 2019.
@article{8624523,
  abstract     = {{Microencapsulation is almost exclusively performed in batch processes. With today's chemistry increasingly performed in flow reactors, this work aims to realise a continuous reactor setup for the encapsulation of an ester with a polyuria (PU) shell. The generation of an emulsion template is performed in a recirculation loop driven by a pump and equipped with static mixers, screen type and Kenics((R)). Calorimetric measurements are performed to characterise the energy dissipation rate inside the loop. The curing step is performed in a coiled tube reactor with two geometric configurations. Number based capsule size distributions are derived from micrograph analysis. Results indicate that the recycle pump is the main contributor to determine the capsule size distribution. A continuous setup is achieved for PU microcapsules containing hexyl acetate with a production rate of 198g/h dry capsules, and a mean capsule diameter of 13.3 mu m with a core content of 54wt%.}},
  author       = {{Gobert, Sven RL and Segers, Marleen and Luca, Stijn and Teixeira, Roberto FA and Kuhn, Simon and Braeken, Leen and Thomassen, Leen CJ}},
  issn         = {{0265-2048}},
  journal      = {{JOURNAL OF MICROENCAPSULATION}},
  keywords     = {{Microencapsulation,flow reactor,static mixer,recirculation loop,energy dissipation rate,LIQUID-LIQUID DISPERSION,RESIDENCE TIME DISTRIBUTION,STATIC MIXERS,DROPLET FORMATION,FLOW,MICROCHANNEL,MEMBRANE,HYDRODYNAMICS,FORMULATION,BREAKAGE}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{371--384}},
  title        = {{Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell}},
  url          = {{http://doi.org/10.1080/02652048.2019.1633433}},
  volume       = {{36}},
  year         = {{2019}},
}
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