Regenerated Cellulose Films Coated with Waterborne Polyurethane with Enhanced Mechanical Properties.

ABSTRACT: Regenerated cellulose (RC) films with abundant sources and low processing costs are considered to be excellent biodegradable and recycled packaging materials. However, there is still a problem to be solved: the poor strength of RC films in the wet state. Polyurethane (PU) possesses excellent mechanical properties, biocompatibility and biodegradability. In this work, a PU coating is successfully introduced on the RC film surface via a facile surface engineering strategy, followed by plane hot-pressing process, and the RC@PU films are obtained. Notably, under wet conditions, RC@PU films show outstanding mechanical properties (fracture stress of 22.5 MPa, fracture strain of 75.9%, toughness of 10.6 MJ/m³), which are greater than those of the pure RC films (18.9 MPa, 56.5%, 6.9 MJ/m

SUBMITTER: Xiong R 

PROVIDER: S-EPMC11991312 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature