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Efficient encapsulation of isocyanates in PCL/PLA biodegradable microcapsules for adhesives by António Aguiar; Mónica V. Loureiro; Isabel Pinho; Ana C. Marques is a Engineering article available to read on EtoBox.

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## Abstract Microencapsulation of isocyanates eliminates the risks associated with their direct handling, protects the isocyanate species from air moisture, and increases the storage life. In light of this, we present a straightforward and efficient process to encapsulate isophorone diisocyanate (IPDI) using biodegradable polymers by an emulsion system combined with the solvent evaporation method. We produced spherical, disaggregated, and core–shell microcapsules (MCs) using poly(ε-caprolactone) (PCL), polylactic acid (PLA), or PCL/PLA blends as shell materials. As far as we know, it is the first time that isocyanate species are encapsulated by PLA or PCL/PLA blends. Our process leads to a production yield of 70–74% and an encapsulated isocyanate content up to 73 wt% of the MCs. All MCs showed very good isocyanate protection, especially when stored in low-moist environments. Their use as cross-linking agents for harmless, eco-innovative, and high-performance adhesive formulations for footwear was tested, for the first time, according to the specifications of industry standards. The peel tests of the adhesive’s joints revealed peeling strength values between 3.45 and 6.09 N/mm which

Who reads Efficient encapsulation of isocyanates in PCL/PLA biodegradable microcapsules for adhesives?

Author

António Aguiar; Mónica V. Loureiro; Isabel Pinho; Ana C. Marques

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Engineering (Physical Sciences)