Enhancing flame retardancy, antibacterial activity and UV resistance of polyamide 66 fabric by fully biobased intumescent flame-retardant nanocellulose coating

Xue Ma ¹, Yunyun Zhang ¹, Hou-Yong Yu ²

⁰Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.

International Journal of Biological Macromolecules +

|

November 24, 2024

View abstract on PubMed

Summary

Biobased flame retardants made from cellulose nanocrystals, tannic acid, and phytic acid were applied to polyamide 66 (PA66) fabric. This treatment significantly reduced fire hazards, smoke production, and added antibacterial and UV resistance.

Area Of Science

Materials Science
Polymer Chemistry
Textile Engineering

Background

Polyamide 66 (PA66) fabric poses significant fire risks due to its inherent flammability.
Developing effective flame-retardant treatments for textiles is crucial for safety.

Purpose Of The Study

To synthesize and apply fully biobased intumescent flame retardants (IFRs) to PA66 fabric.
To enhance the flame retardancy, antibacterial properties, and UV resistance of PA66 fabric.
To evaluate the multifunctional performance and mechanical integrity of the treated fabric.

Main Methods

Synthesis of IFRs using cellulose nanocrystals (CNC), tannic acid (TA), and phytic acid (PA).
Coating of IFRs onto the surface of PA66 fabric.
Evaluation of flame retardancy through smoke production tests (TSP and SPR).
Assessment of antibacterial activity, UV resistance, mechanical properties, and air permeability.

Main Results

IFR coating significantly reduced total smoke production (TSP) by 71.0% and smoke production rate (SPR) by 36.7%.
The treated PA66 fabric (PA66/IFR) exhibited enhanced flame retardancy due to synergistic condensed and gas phase effects.
The fabric demonstrated notable antibacterial activity and UV resistance, attributed to tannic acid.
Mechanical properties and air permeability remained satisfactory after treatment.

Conclusions

Fully biobased IFRs offer an effective and green solution for improving PA66 fabric safety.
The developed multifunctional PA66 fabric meets diverse application demands with enhanced properties.
This approach provides a sustainable method for creating advanced textile materials.

Keywords:

Antibacterial ability Cellulose nanocrystals flame-retardant Flame retardancy PA66 fabric UV resistance