Exploring the Impact of the Synthesis Variables Involved in the Polyurethane Aerogels-like Materials Design.

ABSTRACT: This research presents a novel approach to synthesising polyurethane (PUR)-based aerogels at the pilot scale, optimizing synthesis variables such as the gelation solvent, solids content, chain extender/isocyanate ratio, and dispersion mode. The solids content (2-11 wt.%) is the parameter with the most influence on the density of the aerogels, with a clear decrease in this property as the solids content decreases. On the other hand, it was demonstrated that minimizing the excess of ethylenediamine (used as chain extender) in relation to the isocyanate is a valuable consideration to improve the thermal conductivity of the aerogel. Related to the chain extender/isocyanate ratio, a compromise situation where the initial isocyanate reacts almost completely is crucial. Fourier-transform infrared

SUBMITTER: Pinilla-Penalver E 

PROVIDER: S-EPMC10970664 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature