TY - JOUR
T1 - Supramolecular-Wrapped α-Zirconium Phosphate Nanohybrid for Fire Safety and Reduced Toxic Emissions of Thermoplastic Polyurethane
AU - Han, Sensen
AU - Li, Qingsong
AU - Ma, Na
AU - Liu, Dongyan
AU - Sui, Guoxin
AU - Araby, Sherif
N1 - Publisher Copyright:
© 2024 American Chemical Society
PY - 2024/1/26
Y1 - 2024/1/26
N2 - In the current study, a facile approach is introduced to enhance the flame retardancy of thermoplastic polyurethane (TPU) using a supramolecular-wrapped α-zirconium phosphate nanohybrid (CPP@ZrP). The CPP@ZrP nanohybrid was successfully synthesized by enveloping a phytic acid-doped polypyrrole shell and linking it to cobalt ions via the multivalent anions of phytic acid. The CPP@ZrP nanohybrid exhibited relatively uniform dispersion within the TPU matrix, leading to strong interface between TPU and CPP@ZrP and hence high mechanical and flame-retarding properties. The strength of TPU increased by 37% with 850% elongation at break at 5.0 wt % CPP@ZrP. Similarly, adding CPP@ZrP into TPU substantially reduced the peak heat release rate by 41.8%, peak smoke production rate by 25.8%, and total CO production by 32.9%. The average effective heat of combustion from the TPU/CPP@ZrP composite was reduced by 25% which confirms the reduction in flammable volatile substances. The experimental measurements and morphology of char residuals reveal that the CPP@ZrP nanohybrid reduces the flame retardancy of TPU in the gas and condensed phases via reacting with the flammable volatiles and preventing heat transfer to the flames. The study introduces a facile approach to designing a metallic-organic-inorganic hybrid flame retardant, CPP@ZrP, with high efficacy in reducing fire risks and mitigating smoke toxicity in polymers.
AB - In the current study, a facile approach is introduced to enhance the flame retardancy of thermoplastic polyurethane (TPU) using a supramolecular-wrapped α-zirconium phosphate nanohybrid (CPP@ZrP). The CPP@ZrP nanohybrid was successfully synthesized by enveloping a phytic acid-doped polypyrrole shell and linking it to cobalt ions via the multivalent anions of phytic acid. The CPP@ZrP nanohybrid exhibited relatively uniform dispersion within the TPU matrix, leading to strong interface between TPU and CPP@ZrP and hence high mechanical and flame-retarding properties. The strength of TPU increased by 37% with 850% elongation at break at 5.0 wt % CPP@ZrP. Similarly, adding CPP@ZrP into TPU substantially reduced the peak heat release rate by 41.8%, peak smoke production rate by 25.8%, and total CO production by 32.9%. The average effective heat of combustion from the TPU/CPP@ZrP composite was reduced by 25% which confirms the reduction in flammable volatile substances. The experimental measurements and morphology of char residuals reveal that the CPP@ZrP nanohybrid reduces the flame retardancy of TPU in the gas and condensed phases via reacting with the flammable volatiles and preventing heat transfer to the flames. The study introduces a facile approach to designing a metallic-organic-inorganic hybrid flame retardant, CPP@ZrP, with high efficacy in reducing fire risks and mitigating smoke toxicity in polymers.
KW - fire safety
KW - mechanical performance
KW - smoke suppression
KW - thermoplastic polyurethane
KW - zirconium phosphate
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U2 - 10.1021/acsapm.3c02481
DO - 10.1021/acsapm.3c02481
M3 - Article
AN - SCOPUS:85183520774
SN - 2637-6105
VL - 6
SP - 1376
EP - 1388
JO - ACS Applied Polymer Materials
JF - ACS Applied Polymer Materials
IS - 2
ER -