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

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®. 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 198 g/h dry capsules, and a mean capsule diameter of 13.3 µm with a core content of 54 wt%.

journal_name

J Microencapsul

authors

Gobert SRL,Segers M,Luca S,Teixeira RFA,Kuhn S,Braeken L,Thomassen LCJ

doi

10.1080/02652048.2019.1633433

subject

Has Abstract

pub_date

2019-06-01 00:00:00

pages

371-384

issue

4

eissn

0265-2048

issn

1464-5246

journal_volume

36

pub_type

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