Evaporation-Induced Polyelectrolyte Complexation: The Role of Base Volatility and Cosolvents.

ABSTRACT: Film formation is a vital step for coating applications where a homogeneous, defect-free solid phase should be obtained, starting from a liquid casting formulation. Recently, an alternative waterborne-coating approach was proposed, based on the formation of a polyelectrolyte complex film. In this approach, an evaporating base induces a pH change during drying that initiates the complexation of oppositely charged polyelectrolytes, followed by further densification. In previous studies, ammonia was used as the evaporative base, leading to relatively fast evaporation and resulting in films showing significant brittleness, which tended to crack at low relative humidity or larger thicknesses. We hypothesize that slower complexation and/or evaporation can reduce the problematic stress build-up i

SUBMITTER: Li J 

PROVIDER: S-EPMC10851664 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature