Methods of PCM microcapsules application and the thermal properties of modified knitted fabric

• We applied microcapsules containing n-octadecane for the modification of knitted fabric.
• We used printing, coating and padding techniques for the application of microcapsules.
• M-PCM application methods allow to regulate the thermal properties of textiles.
• M-PCM application methods allow to regulate the air permeability properties of textiles.

The aim of the study is to analyze the impact of application methods of microcapsules containing n-octadecane as phase change materials (M-PCM) on the thermal properties and air permeability of modified textile fabric. Polyester knitted fabric, printing, coating and padding methods and polymer pastes with 20 wt.% of M-PCM were used. For the assessment of modification effects the differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used. DSC analysis showed that the highest enthalpy of phase transitions has printed fabric and the lowest padded fabric. The widest range of phase transitions temperatures was observed for printed fabric, slightly narrower for coated fabric and the narrowest for padded fabric. SEM analysis showed differences in the morphology of modified fabrics depending on incorporation techniques, which are compatible with differences in air permeability results. M-PCM application techniques allow to regulate the thermal and air permeability properties of fabric.