

FOLLOWUS
a.College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
b.State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
c.State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
lijuan_zhao@sicnu.edu.cn (L.J.Z.)
wujinrong@scu.edu.cn (J.R.W.)
Received:17 March 2020,
Revised:2020-4-13,
Accepted:15 April 2020,
Online First:09 June 2020,
Published:10 September 2020
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Yang, J. Y.; Xia, Y.; Zhao, J.; Yi, L. F.; Song, Y. J.; Wu, H.; Guo, S. Y.; Zhao, L. J.; Wu, J. R. Flame-retardant and self-healing biomass aerogels based on electrostatic assembly. Chinese J. Polym. Sci. 2020, 38, 1294–1304
Ji-Yu Yang, Yu Xia, Jin Zhao, et al. Flame-retardant and Self-healing Biomass Aerogels Based on Electrostatic Assembly[J]. Chinese Journal of Polymer Science, 2020, 38(12): 1294-1304.
Yang, J. Y.; Xia, Y.; Zhao, J.; Yi, L. F.; Song, Y. J.; Wu, H.; Guo, S. Y.; Zhao, L. J.; Wu, J. R. Flame-retardant and self-healing biomass aerogels based on electrostatic assembly. Chinese J. Polym. Sci. 2020, 38, 1294–1304 DOI: 10.1007/s10118-020-2444-4.
Ji-Yu Yang, Yu Xia, Jin Zhao, et al. Flame-retardant and Self-healing Biomass Aerogels Based on Electrostatic Assembly[J]. Chinese Journal of Polymer Science, 2020, 38(12): 1294-1304. DOI: 10.1007/s10118-020-2444-4.
It remains a significant challenge to fabricate self-healing aerogels with excellent flame retardancy. Herein
we develop a class of biomass aerogels by electrostatically assembling chitosan (CS)
phytic acid (PA)
and itaconic acid (IA). The electrostatic interaction between CS and IA is weak and dynamic
so freeze-drying the solution of CS and IA enables the formation of continuous aerogel skeleton with self-healing ability and re-programmability; in comparison
the electrostatic interaction between CS and PA is strong and less dynamic
and thus mixing PA with CS in aqueous solution leads to fine precipitates of high flame retardancy due to the synergistic phosphorus-nitrogen effect. Integrating the continuous skeleton and the fine precipitates results in self-healing aerogles with UL-4 V-0 rating of flame retardancy aerogels and auto-extinguishable feature. Interestingly
the aerogels after burning in flame for 30 s form a skin-core structure
and the carbonized skin protects the integrity of the aerogels and the self-healing ability of the internal parts. Therefore
this work provides a facile strategy to develop multi-functional aerogels which hold great promise for advanced applications.
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