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Polymers
Volume 15
Issue 3
10.3390/polym15030665
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Article

Biodegradable Microcapsules of Poly(Butylene Adipate-co-Terephthalate) (PBAT) as Isocyanate Carriers and the Effect of the Process Parameters

by
António Aguiar
1,2,*,
António Mariquito
1,
Diogo Gonçalves
1,
Isabel Pinho
2 and
Ana C. Marques
1,*
1
CERENA, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
2
CIPADE—Indústria e Investigação de Produtos Adesivos, SA., Av. Primeiro de Maio 121, 3700-227 São João da Madeira, Portugal
*
Authors to whom correspondence should be addressed.
Polymers 2023, 15(3), 665; https://doi.org/10.3390/polym15030665
Submission received: 3 January 2023 / Revised: 24 January 2023 / Accepted: 26 January 2023 / Published: 28 January 2023
(This article belongs to the Special Issue Biodegradable Polymer Microcapsules)
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Abstract

Poly(butylene adipate-co-terephthalate) (PBAT), a biodegradable flexible, and tough polymer is herein used, for the first time, to encapsulate and protect isocyanate derivatives. Isocyanates are essential building blocks widely employed in the chemical industry for the production of high-performing materials. Microencapsulation of isocyanates eliminates the risks associated with their direct handling and protects them from moisture. In light of this, and having in mind eco-innovative products and sustainability, we present a straightforward process to encapsulate isophorone diisocyanate (IPDI) using this biodegradable polymer. Spherical and core-shell microcapsules (MCs) were produced by an emulsion system combined with the solvent evaporation method. The MCs present a regular surface, without holes or cracks, with a thin shell and high isocyanate loadings, up to 79 wt%. Additionally, the MCs showed very good isocyanate protection if not dispersed in organic or aqueous solutions. Effects of various process parameters were systematically studied, showing that a higher stirring speed (1000 rpm) and emulsifier amount (2.5 g), as well as a smaller PBAT amount (1.60 g), lead to smaller MCs and narrower size distribution.
Keywords: Poly(butylene adipate-co-terephthalate); PBAT; biodegradable microcapsules; isophorone diisocyanate; IPDI; solvent evaporation; morphology Poly(butylene adipate-co-terephthalate); PBAT; biodegradable microcapsules; isophorone diisocyanate; IPDI; solvent evaporation; morphology
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MDPI and ACS Style

Aguiar, A.; Mariquito, A.; Gonçalves, D.; Pinho, I.; Marques, A.C. Biodegradable Microcapsules of Poly(Butylene Adipate-co-Terephthalate) (PBAT) as Isocyanate Carriers and the Effect of the Process Parameters. Polymers 2023, 15, 665. https://doi.org/10.3390/polym15030665

AMA Style

Aguiar A, Mariquito A, Gonçalves D, Pinho I, Marques AC. Biodegradable Microcapsules of Poly(Butylene Adipate-co-Terephthalate) (PBAT) as Isocyanate Carriers and the Effect of the Process Parameters. Polymers. 2023; 15(3):665. https://doi.org/10.3390/polym15030665

Chicago/Turabian Style

Aguiar, António, António Mariquito, Diogo Gonçalves, Isabel Pinho, and Ana C. Marques. 2023. "Biodegradable Microcapsules of Poly(Butylene Adipate-co-Terephthalate) (PBAT) as Isocyanate Carriers and the Effect of the Process Parameters" Polymers 15, no. 3: 665. https://doi.org/10.3390/polym15030665

APA Style

Aguiar, A., Mariquito, A., Gonçalves, D., Pinho, I., & Marques, A. C. (2023). Biodegradable Microcapsules of Poly(Butylene Adipate-co-Terephthalate) (PBAT) as Isocyanate Carriers and the Effect of the Process Parameters. Polymers, 15(3), 665. https://doi.org/10.3390/polym15030665

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