A Study on the Flame Retardancy Improvement Mechanism of Cotton Fabrics Through the Formation of Multi-layers of Polyacrylic Acid and Calcium Phosphate 


Vol. 59,  No. 6, pp. 346-355, Dec.  2022
10.12772/TSE.2022.59.346


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  Abstract

Cotton fabrics with improved flame retardancy were manufactured by introducing calcium phosphate groups into cotton fabrics using the LBL (Layer-by-layer deposition) method in which polyacrylic acid is used as one layer, and the flame retardant mechanism was studied. As a result of scanning electron microscopy, the shape of the fabrics and cotton fiber not treated with LBL was destroyed, but the shape of the fabrics and the shape of the fibers were maintained in the LBL-treated cotton fabric. In the flame retardancy test of the LBL-treated fabrics, it was observed that numerous nanoparticles with a size of 40- 60 nm were formed on the surface of the cotton fiber. In XPS (X-ray photoelectron spectroscopy) analysis, it can be confirmed that nanoparticles of calcium phosphate are generated by the reaction between phosphoric acid and calcium. This result shows that flame retardancy was improved by a mechanism in which an incombustible calcium phosphate layer is formed by a reaction between phosphoric acid and a calcium metal salt, as well as an increase in char formation of cellulose by phosphoric acid. XRD (X-ray diffraction analysis) confirmed that the nanoparticles produced were hydroxyapatite calcium phosphate. This result is significant in suggesting a new method for preparing hydroxyapatite nanoparticles by an environmentally friendly LBL method.

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pISSN : 1225 - 1089
eISSN : 2288 - 6419

한국연구재단 우수등재학술지 유지 (2022년)