Journal
POLYMER CHEMISTRY
Volume 10, Issue 37, Pages 5151-5158Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9py01015g
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Funding
- Sichuan Science and Technology Program [2016GZ0425, 2019YFG0250, 2019YFG0174]
- National Natural Science Foundation of China [11702212]
- Talent Introduction Funds of the Sichuan University of Science and Engineering [2018RCL03]
- Sichuan Key Laboratory Scientific Research Project for Comprehensive Utilization of Vanadium and Titanium Resources [2018FTSZ17, 2018FTSZ19]
- Youth Science and Technology Innovation Research Team Special Project of Sichuan Province [2017TD0012]
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Hydrogels as fire-resistant materials have attracted great attention due to their high water content and tailored shapes that can cover various surfaces. As fire-resistant materials, hydrogels should be mechanically tough, self-healable, and able to retain water under ambient environment for a long period. However, this combination is rarely realized. Here in this work, a series of Li-alginate/poly(acrylamide-co-stearyl methacrylate) [Li-alginate/P(AAm-co-SMA)] hydrogels with fully physically cross-linked interpenetrating networks have been prepared. The obtained hydrogels exhibit the maximum fracture energy of similar to 6800 J m(-2), which is high enough for being used as fire-resistant materials. A fire resistance test suggests that the hydrogel is capable of withstanding 1300 degrees C flame for 50 s. The self-healing property ensures the recovery of the fire-resistance properties of the gels after being scratched or damaged. The water retention capacity promises the time-effectiveness of fire-resistance lasting for 6 months and even longer. In a word, the Li-alginate/P(AAm-co-SMA) hydrogels are potentially being applied as fire-resistant coatings for structures, trees and fireproof clothes.
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