Obtaining cassava starch biofilms with hydroxyapatite using egg shells

Autores

  • Maria Helena Lima Silva
  • Ricardo Henrique Lima Leite
  • Edna Aroucha
  • Francisco Klebson Gomes Santos

DOI:

https://doi.org/10.30969/acsa.v17i1.1286

Palavras-chave:

Engenharia de Materiais, Ecologia

Resumo

Biofilms consist of biodegradable compounds which can be replaced by materials that are not degradable, in order to reduce the impacts that they can generate for the environment. The main objective of this paper was to synthesize cassava starch membranes using hydroxyapatite, in which it represents a ceramic biomaterial. The biofilms were obtained using 2%w cassava starch, 30%w glycerol and hydroxyapatite varying in five different concentrations (0.000%; 0.010%; 0.025%; 0.035%; 0.050%). The preparation of the solution consisted of the mixture of cassava starch, glycerol, hydroxyapatite and distilled water, which were subjected to magnetic stirring with heating until reaching the gelation phase. The solution was put to rest, then submitted to an ultrasonic bath and later deposited in acrylic plates for drying in oven at 50ºC for 5 hours. The hydroxyapatite reduced the rate of water vapor permeability by 18%, decreased water solubility by 20% and increased opacity by 8%. The addition of the ceramic compound changed the physicochemical properties of the film, making it promising for using as biodegradables bags, for example.

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Publicado

2022-12-14

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Original Articles / Artigos de Pesquisa