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New Spray-Dried Microcapsule Based on Brazilian Cashew Polysaccharide (Anacardium othonianum Rizz.) and Maltodextrin as Wall Material

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The study describes the microencapsulation of Pterodon emarginatus fruit essential oil (OE) by spray drying using Brazilian Cerrado cashew polysaccharide (PEJU, Anacardium othonianum Rizz.) and maltodextrin (M) as wall materials. The microcapsules presented particles with irregular and rough surfaces confirmed by X-ray diffraction, with 57% in dry diameters ranging from 0 to 1 μm. Thermogravimetry showed a thermostable encapsulating material (peaks at 301 °C and 429 °C), with no loss of the encapsulated core. Zeta potential (ζ =  − 0.18 mV) demonstrated the material’s amphiphilic power. The ratio of 1:3:3.6 of OE:cashew PEJU:M (w/w/w) showed the best encapsulation effect (75% yield and 6.25% of the OE retained) in the same proportion of β-caryophyllene retained. The Brazilian Cerrado cashew PEJU is a promising source for use as wall material in microcapsules, especially in protecting the OE of P. emarginatus fruits, as replacement for other gums, such as gum Arabic.

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This work was supported by Universidade Estadual de Goiás (Pró-projetos/pesquisa n. 201600020010722). The authors thank Dr. Eli Regina B. de Souza for provide cashew trees, and the Laboratory of Produtos Naturais of the Universidade Federal de Goiás to allow the High Performance Liquid Chromatography analyzes. Dr. Ivano Alessandro Devilla, as well as Waldeir Costa e Silva from Laboratory of Secagem e Armazenamento de Produtos Vegetais of the Universidade Estadual de Goiás provided the Spray Dryer. Finally, authors thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for PhD Scholarship granted to Thâmara Machado e Silva. Also, the PROBIP/UEG for Productivity Fellowship granted to Samantha Salomão Caramori.

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Correspondence to Samantha S. Caramori.

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Silva, T.M., Borges, L.L., Alves, S.F. et al. New Spray-Dried Microcapsule Based on Brazilian Cashew Polysaccharide (Anacardium othonianum Rizz.) and Maltodextrin as Wall Material. J Polym Environ 28, 854–862 (2020).

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  • Encapsulation
  • Microcapsules
  • Biodegradable polymers