High-Optical-Performance Composite Films of Deep Eutectic Solvent Pretreated-Cellulose Nanofibrils and Fibrous Clay Minerals.

ABSTRACT: Cellulose nanofibrils (CNFs) produced via deep eutectic solvent (DES) pretreatment were used, for the first time, to prepare composite films/nanopapers with fibrous clays (sepiolite and palygorskite). Highly transparent films containing up to 50% clay were successfully obtained, avoiding energy-intensive homogenization processes and clay chemical modifications, with absolute transparency losses relative to the transparency of the neat CNF film of ∼15% for 50% sepiolite. Higher transparency losses were found for TEMPO-oxidized CNF and cationic CNF composite films prepared for comparison purposes. Moreover, films with wet micronized sepiolite exhibited higher transparency than those with dry micronized sepiolite or with palygorskite. The combination of very thin, highly functionalized, and d

SUBMITTER: Almeida RO 

PROVIDER: S-EPMC12818757 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature