Study of chitosan with different degrees of acetylation as cardboard paper coating

Autor(es)

Gatto, Mariane ^[1] ; Ochi, Deise ^[1] ; Pedroso Yoshida, Cristiana Maria ^[1] ; da Silva, Classius Ferreira ^[1]

Afiliação do(s) autor(es)

^[1] UNIFESP Fed Sao Paulo Univ, Inst Environm Chem & Pharmaceut Sci, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Carbohydrate Polymers; v. 210, p. 56-63, APR 15 2019.
• Citações Web of Science: 1

Resumo

The biodegradability of chitosan is significant for packaging systems. Another relevant property of chitosan is its degree of acetylation (DA), which affects other properties, such as crystallinity and hydrophobicity. The DA can be modulated by chitin deacetylation or even chitosan reacetylation. The novelty of this paper is the application of reacetylated chitosan as a coating for cardboard paper surfaces to improve the barrier and mechanical properties of the paper. Chitosan with 2% DA was reacetylated to yield chitosan with 48% DA. Both samples were applied as cardboard paper coating, and the coated materials were characterized. The paper-film system of chitosan with 2% DA had better water barrier and mechanical resistance. Heterogeneous deacetylation of chitin reduced the solubility of chitosan because molecular groups were distributed in blocks, increasing the hydrophobicity of the polymer. (AU)

• Processo FAPESP: 16/25120-7 - Embalagens ativas de papel Kraft para adsorção do fitohormônio (etileno) no acondicionamento de frutos climatéricos
• Beneficiário: Classius Ferreira da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular