A concise water-solvent synthesis of highly effective, durable, and eco-friendly flame-retardant coating on cotton fabrics

Carbohydrate Polymers
Fengxiu ZhangGuangxian Zhang

Abstract

A new halogen-free and formaldehyde-free ammonium salt of melamine hexa(methylphosphonic acid) (AMHMPA) was facilely synthesized as flame retardant (FR) material under water-solvent and low temperature condition to counter inflammable cotton fabric fire hazard. The reactive PO(NH4)2 and PO(OH)2 groups from AMHMPA reacted with cotton reactive OH groups to form POC bonds. A layer of AMHMPA was coated onto the treated-cotton surface, and a carbon skeleton was formed after combustion. The char residue percentages of the treated-cotton fabrics and untreated fabric were 38.5 and 3.6% at 600 °C, respectively. The phosphorus contents for the control, treated-cotton and burned-cotton were 0, 37.499 and 24.896%, respectively. The LOIs of cotton treated with 30-90 g/L AMHMPA reached 32.0-43.0%. After 50 laundering cycles (LCs), the LOIs still maintained 26.0-33.4%. AMHMPA-treated cotton had no cytotoxicity towards the environment and humans. These results demonstrated that AMHMPA-treated cotton exhibited eco-friendly, outstanding durability and excellent flame retardancy. TG-IR and cone calorimeter results confirmed AMHMPA condensation phase flame retardant mechanism.

References

Feb 13, 2013·Carbohydrate Polymers·A Abou-OkeilF A Abdel-Mohdy
Apr 20, 2014·ACS Applied Materials & Interfaces·Zhu-Bao ShaoYu-Zhong Wang
Aug 3, 2017·ACS Applied Materials & Interfaces·Oruç KöklükayaLars Wågberg

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Citations

Jul 6, 2021·ACS Applied Materials & Interfaces·Zhenwei MiaoZhanpeng Wu

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