Autor(es)

Silva, Daiane B. ; Ramasini, Bruna P. M. ; Comodaro, Alex J. M. ; Gouveia, Rubia F. ; Sampaio, Nadia M. V. ; Bernardes, Juliana S.

• Tipo de documento: Artigo Científico
• Fonte: CHEMICAL ENGINEERING JOURNAL; v. 523, p. 12-pg., 2025-11-01.

Resumo

Paper packaging can be an alternative to address environmental issues related to excessive plastic use, as it is renewable, biodegradable, and recyclable. However, its barrier properties must be enhanced to expand its application. In this work, we utilized the electrostatic interactions between negatively charged natural rubber latex (NRL) and positively charged nanocellulose to develop a multilayer coating with good compatibility and improved properties. The interaction between cationic cellulose nanofibrils (CCNF) and NRL was investigated using crystal microbalance with dissipation. The barrier against water, water vapor (WVTR), oxygen (OTR), and grease was evaluated as a function of deposited layers. The five-layered paper (CCNF/NRL/CCNF/NRL/CCNF) reduced the paper's WVTR by approximately 20 times (from 732 to 36 g m- 2 day- 1) and an OTR of 38 cm3 m- 2 day- 1 was achieved. The resistance to oil and grease reached the highest barrier level. Additionally, the coated paper presents antibacterial activity against E. coli, with more than 99 % cell death upon direct contact. This effect is attributed to the electrostatic interaction of the cationic layer and bacterial membrane. Our work demonstrates how to combine oppositely charged materials to produce bio-based, fluorine-free, recyclable, and antibacterial multilayer-coated paper with excellent barrier properties. This approach offers a promising alternative for improving sustainability and functionality to the packaging industry. (AU)

• Processo FAPESP: 24/00989-7 - Centro de Pesquisa em Engenharia Molecular para Materiais Avançados (CEMol)
• Beneficiário: Edson Roberto Leite
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 20/07794-6 - Materiais avançados de nanocelulose obtidos através de complexação eletrostática interfacial
• Beneficiário: Juliana da Silva Bernardes
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular