关键词: 氧化锡锑, 聚乙烯醇, 静电纺丝, 保温

Abstract:

Thermal management in functional outdoor protective materials is one of the important aspects. For functional fabric development, coating finishing technique is one of commonly used methods, but the balance between functionality and breathability is the key point. The novel polyvinye alcohol/ antimony-doped tin oxide (PVA/ATO) nano-composite fiber mats were designed by using electrospinning process. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were applied to characterize the properties and structure of the mats. Thermal insulation property and air permeability of PVA/ATO/viscose wet-laid laminated functional materials were also tested and evaluated. Results showed that ATO particles were well dispersed in the PVA matrix and some mosaic particles were found on the nanofiber surface. The warmth retention of PVA/ATO/viscose laminated functional materials was 28.9% higher than that of pure viscose wet-laid nonwoven, reaching 37.1%, corresponding heat transfer coefficient of 12.62 W/m²·℃ and CLO value of 0.32. The addition of ATO nano-particles can directly improve the stacking structure of PVA/ATO nanofiber mat, making the permeability of PVA/ATO/viscose laminated functional materials significantly higher than that of PVA/viscose laminated materials, but the trend decreased with the increase of the thickness of PVA/ATO nano-composite fiber layers. The PVA/ATO nano-composite fiber mats can be composited on a variety of substrates, providing an idea for the development of thermal insulation and ventilation based on nanofiber functional materials.

Key words: antimony-doped tin oxide, polyvinyl alcohol, electrospinning, thermal insulation