A reinforced thermal barrier coat of a Na-tannic acid complex from the view of thermal kinetics.

ABSTRACT: The poor burning resistance of cotton necessitates the control of its pyrolytic reactions, but many approaches have relied on the use of synthetically engineered chemicals. Herein, we show how a natural polyphenol from plants-tannic acid-acts with sodium ions to create a robust thermal barrier coat on cotton, with a focus on thermal kinetics. The kinetic information, combined with thermal and spectral analyses, revealed that the outer layer of galloyl units in tannic acid decomposes via a two-step reaction, producing a multicellular char of crosslinked aromatic rings, followed by the blowing of carbonaceous cells into a further expanded structure. This intumescent function of tannic acid was found to be enhanced upon its complexation with sodium ions, which greatly increased the act

SUBMITTER: Nam S 

PROVIDER: S-EPMC9062495 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature