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Polyelectrolyte Complex with Controllable Viscosity by Doping Cu2+ Protects Nylon-Cotton Fabric against Fire
Jia-Lin He1, Wei Luo1, Ting Wang1
1School of Science, Xihua University, 9999 Hongguang Road, Chengdu 610039, China.
ACS Applied Materials & Interfaces
|November 28, 2022
Summary
This study developed a flame-retardant treatment for nylon-cotton fabrics using a copper-doped polyelectrolyte complex (CPEC). The simple coating method imparts self-extinguishing properties with minimal copper addition, enhancing fabric safety.
Area of Science:
- Materials Science
- Polymer Chemistry
- Textile Engineering
Background:
- Nylon-cotton (NC) blend fabrics are prevalent in demanding applications but suffer from high flammability.
- Existing flame-retardant treatments may be complex or inefficient.
Purpose of the Study:
- To develop a simple and effective method for imparting flame retardancy to NC fabrics.
- To utilize a copper-doped polyelectrolyte complex (CPEC) for flame retardancy.
Main Methods:
- Blade coating NC fabric with a CPEC comprising ammonium polyphosphate (APP), polyethylenimine (PEI), and copper sulfate (CuSO4).
- Adjusting CPEC viscosity and composition by varying CuSO4 content and the proportions of PEI and APP.
- Evaluating flame retardancy using a vertical burning test.
Main Results:
- A suitable CPEC was formulated by optimizing PEI, APP, and CuSO4 content.
- Ultralow concentrations of Cu2+ (0.067 wt %) were sufficient to achieve self-extinguishing behavior.
- The treatment process is a simple two-step method.
Conclusions:
- Simple blade coating with ultralow metal-doped CPEC is a promising technology for imparting flame retardancy to flammable polymeric substrates.
- This method offers an efficient way to enhance the safety of NC fabrics for military and industrial use.
