Encapsulation of Oxidizers: Efficient Method by Spout-fluid Bed

Autor(es)

Silva, Jessica de Oliveira ; Silva, Josiane Ribeiro Campos ; de Oliveira, Lucas Barros ; Cardoso, Kamila Pereira ; Nagamachi, Marcio Yuji ; de Araujo Ferrao, Luiz Fernando

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF AEROSPACE TECHNOLOGY AND MANAGEMENT; v. 11, p. 4-pg., 2019-01-01.

Resumo

In composite solid propellants, the oxidizer in the form of particles is embedded in a polymeric matrix. In general, these oxidizer consist in inorganic salts that are hygroscopic, chemically incompatible or sensitive to friction or impact, so that microencapsulation can be applied as a mean to provide a protective coating layer. This work aims to assess the effectiveness of the spout-fluid bed method to perform microencapsulation of ammonium perchlorate particles with acrylic-based resin. The formed coating integrity was assessed by an optical stereomicroscope for samples with one, two and four layers of coating before and after dissolving the cores in water. The parameters utilized in this method provided a complete and individualized encapsulation with sufficient integrity. Therefore, the spout-fluid bed method proved to be effective, particularly with the application of multiple layers. (AU)

• Processo FAPESP: 19/03729-8 - Desenvolvimento teórico-experimental de materiais energéticos aplicados à propulsão química
• Beneficiário: Luiz Fernando de Araújo Ferrão
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/00618-5 - Estudo e desenvolvimento de propelente a base de ADN particulado com camada protetora
• Beneficiário: Jessica de Oliveira Silva
• Modalidade de apoio: Bolsas no Brasil - Mestrado