Continuous Production of Melamine-Formaldehyde Microcapsules Using a Mesostructured Reactor

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Moreira, ACG (Author) Other; Manrique, Y.A. (Author) FEUP; Isabel M. Martins (Author) FEUP; Fernandes, IP (Author) Other; Rodrigues, AE (Author) Other; Lopes, JCB (Author) Other; Madalena M. Dias (Author) FEUP

Journal

Title: Industrial & Engineering Chemistry Research

Vol. 59

ISSN: 0888-5885

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 1 Citation

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

TexBioPro - TexBioPro - Funcionalização de substratos têxteis com micropartículas biodegradáveis produzidas em processo contínuo

Other information

Authenticus ID: P-00T-DTZ

DOI: 10.1021/acs.iecr.0c02656

Abstract (EN): A mesostructured NETmix reactor was adapted to develop a continuous process to produce microcapsules, focusing on the steps commonly used in batch formulation: the emulsion and cure. Microcapsules were formed through a polycondensation process by coating Miglyol, a skin-hydrating emollient, with melamine-formaldehyde, which is a resistant shell material with surface smoothness. Different recirculation times were tested for the cure step. Microcapsules show a spherical shape and smooth membrane. Efficiencies of encapsulation of 75%, core contents of 70%, and diameters around 20 mu m, ideal range for textile impregnation, were obtained. Scanning electron microscopy shows the integrity of microcapsules on textiles after impregnation and their flexible behavior. The thermogravimetric analysis confirmed the thermal stability of microcapsules up to 210 degrees C. With the NETmix reactor, it is possible to reduce the cure time of traditional batch formulation in 80%, producing microcapsules with similar characteristics in a continuous process.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10