|
Authors
|
Krishnan, V. G.; Suresh, S.; Thomas, J. P.; Raj, R. B. A.; Leuteritz, A.; Gowd, E. B.
|
|
Title
|
Layer-over-layer electrostatic self-assembly of bioresourced compounds in thermoreversible polylactide gels as an effective approach to enhance the flame retardancy of aerogels
|
|
Date
|
05.06.2024
|
|
Number
|
0
|
|
Abstract
|
Polylactide is a high potential polymer that can satisfy the growing demand for sustainable and lightweight materials in construction, packaging, and structural applications. However, their high flammability poses a serious concern. Herein, with the aid of solvent exchange and noncovalent interactions, poly(l-lactide) (PLLA) thermoreversible gel was modified with sodium alginate (SA), chitosan (CS), and phytic acid (PA) via a layer-over-layer approach. Freeze-drying of the modified hydrogel furnished a highly flame retardant aerogel with shape stability and no shrinkage. The modified PLLA aerogel (PLLA@SA@CS@PA) exhibited self-extinguishment of flame, the highest limiting oxygen index of any porous polylactide (∼32%), and a tremendous reduction in flammability parameters such as the heat release rate, heat release capacity, total heat release, etc. A comprehensive mechanism of flame retardancy was proposed. This work provides a sustainable strategy for the flame retardant modification of semicrystalline polymer-based aerogels and is expected to expand their practical applications in various industrial sectors.
|
|
Publisher
|
American Chemical Society
|
|
Wikidata
|
|
|
Citation
|
Biomacromolecules 25 (2024) 4581-4590
|
|
DOI
|
https://doi.org/10.1021/acs.biomac.4c00577
|
|
Tags
|
|
