Abstract
The lack of thermoregulating functionality and high flammability for cotton fabrics greatly restricts their application in high-performance fields. Herein, we report a versatile layer-by-layer (LBL) assembly strategy for introducing a multilayered film consisting of phase change microcapsules and ammonium polyphosphate to cotton fabric, endowing cotton with thermoregulation and flame retardant properties. The coated fabrics were characterized based on scanning electron microscopy (SEM), water-vapor transmission rate (WVT), thermogravimetry (TG), differential scanning calorimetry (DSC), limiting oxygen index (LOI) and infrared thermal imaging. A fabric deposited with 20 bilayers (MCPM/APP-20) shows an appropriate WVT (50.57 g/m2·h) and improved flame retardancy with an LOI of 24.5 % and residual carbon of 34.53 %. It also shows a melting enthalpy of 30.09 J/g, which results in a temperature difference of 6.4 °C compared with pristine cotton. The functional properties endowed by the LBL assembly are found to be reasonably durable, with the melting enthalpy and residual carbon of MPCM/APP-20 reduced to 17.69 J/g and 19.64 %, respectively, after 30 laundering cycles. This study provides a convenient way to develop multifunctional cotton fabrics that can be good candidates for high-performance textiles.
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