Influence of the Operating Conditions on the Release of Corrosion Inhibitors from Spray-Dried Carboxymethylcellulose Microspheres
Source abstract
Abstract
Sodium carboxymethylcellulose (CMC-Na) microparticles, containing corrosion inhibitor benzotriazole (BTA), were prepared using different spray drying processing parameters, with the purpose of future application in protective coatings for the delivery of corrosion inhibitors. The effects of the processing parameters, such as inlet temperature and spray flow rate, are discussed herein. The biopolymeric CMC-Na microparticles obtained were characterized morphologically by SEM and TEM, and their release profile studied by UV-Vis. The results show that the prepared microparticles (microspheres) were homogeneous, spherically shaped and of a matrix-type nature. Additionally, it was observed that the inlet temperature and spray flow rate significantly influenced the release profiles and process yields. From the different process parameters tested, it was found that the best conditions to achieve higher process yields, higher encapsulation efficiencies and better release properties, were an inlet temperature of 170 °C, a pump rate of 2.5 mL/min, and a drying air-flow rate of 440 L/h.
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Research context
OpenAlex topics: Microencapsulation and Drying Processes · Polymer composites and self-healing · Polymer Foaming and Composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Mechanical Engineering Department, Federal University of Paraná, Curitiba 81531-980, Brazil
Department of Materials and Ceramic Engineering, CICECO–Aveiro Institute of Materials, University of Aveiro, Campus University of Santiago, 3810-193 Aveiro, Portugal
SENAI Institute of Innovation in Electrochemistry, Av. Comendador Franco 1341, Curitiba 80215-090, Brazil
Funding
Coordenação de Aperfeicoamento de Pessoal de Nível Superior · National Council for Scientific and Technological Development · Fundação para a Ciência e Tecnologia · Portugal 2020 European Regional Development Fund
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