Combined effects of clay minerals and polyethylene glycol in the mechanical and water barrier properties of carboxymethylcellulose films

Autor(es)

de Melo Fiori, Ana Paula Santos ^{[1, 2]} ; Camani, Paulo Henrique ^[1] ; Rosa, Derval dos Santos ^[1] ; Carastan, Danilo Justino ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC, Ctr Engn Modeling & Appl Social Sci, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[2] Alagoas Fed Inst, Campus Marechal Deodoro, R Lourival Alfredo 176, BR-57160000 Marechal Deodoro, AL - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INDUSTRIAL CROPS AND PRODUCTS; v. 140, NOV 15 2019.
• Citações Web of Science: 0

Resumo

Carboxymethylcellulose (CMC), a biopolymer with good film-forming abilities, has rather poor mechanical and water vapor barrier properties which restrict its use in potential food packaging applications. Aiming to improve these properties, CMC was therefore modified by the addition of polyethylene glycol (PEG) and sodium-based clay nanofillers. The results showed the combined action of PEG and sodium montmorillonite greatly improved the tensile mechanical properties of CMC, increasing simultaneously its modulus (up to 260%), strength (up to 250%) and elongation (up to 300%). The barrier effect promoted by the clay nanoplatelets in combination with PEG also resulted in an almost fivefold decrease in water vapor permeability. With these improvements, the use of CMC in edible food packaging applications becomes more feasible. (AU)

• Processo FAPESP: 17/25039-8 - Nanocelulose de resíduos de eucalipto por métodos combinatórios: pré-tratamentos assistidos por micro-ondas e isolamento ácido e enzimático com modificação por surfactantes
• Beneficiário: Paulo Henrique Camani
• Modalidade de apoio: Bolsas no Brasil - Mestrado