Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid
Article
Article Title | Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid |
---|---|
ERA Journal ID | 200101 |
Article Category | Article |
Authors | Liu, Linghui, Yao, Miaohong, Zhang, Huan, Zhang, Yan, Feng, Jiabeng, Fang, Zhengping and Song, Pingan |
Journal Title | ACS Sustainable Chemistry and Engineering |
Journal Citation | 10 (49), p. 16313–16323 |
Number of Pages | 11 |
Year | 2022 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 2168-0485 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acssuschemeng.2c05298 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acssuschemeng.2c05298 |
Abstract | Incorporating bio-based flame retardants into polylactic acid (PLA) for improving its fire retarding performance has always been attractive to researchers worldwide, while the synthesis of bio-based flame retardants always involves organic solvents. The drawbacks of bio-based flame retardants are also nonignorable, such as strong hydrophilicity, aggregation, and deterioration of the mechanical properties of PLA. Here, the bio-based flame retardant APP@CS@Si was assembled in the water phase with ammonium polyphosphates (APP) and chitosan (CS) and carboxylated silicone oil (Si-COOH/Si). The results showed that the Si-COOH shell not only decreased the hydrophilicity of the flame retardant but also had superior fire retardancy due to its improved char formation ability. Only 2 wt % APP@CS@Si can endow PLA with satisfying flame retardancy such as the UL-94 V-0 grade. Higher values of the fire propagation index (0.150) and flame retardancy index (1.33) were also achieved by PLA with 4 wt % APP@CS@Si compared with those of PLA with the same loading of APP@CS. Interestingly, the total smoke release amount (TSR) of PLA/4APP@CS@Si was 60% lower than that of PLA/4APP@CS, exhibiting its excellent smoke suppression ability. Moreover, Si-COOH could also be deemed as a soft shell to improve the toughness of PLA with increased impact strength and elongation at break of the PLA composite by 20 and 16%, respectively. |
Keywords | flame retardancy; polylactide; core-shell; smoke suppressing; toughening |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | NingboTech University, China |
Zhejiang University, China | |
Centre for Future Materials |
https://research.usq.edu.au/item/w13q5/aqueous-self-assembly-of-bio-based-flame-retardants-for-fire-retardant-smoke-suppressive-and-toughened-polylactic-acid
46
total views0
total downloads0
views this month0
downloads this month