氮化硼/聚氨酯梯度结构涂层功能织物的制备及性能OA

In recent years,as the level of science and technology continues to improve,people's requirements for textile and clothing are also constantly improving,the past single-function textile has been unable to meet the growing needs of the people,so the functional textiles have become the hot spot of the current researchers.More and more functional textiles have been successfully commercialized applications,and they are playing an increasingly significant role in daily life.Single-sided thermally conductive coated textiles are a special class of functionalized textiles with anisotropy,i.e.,they are thermally conductive on the surface to accelerate heat dissipation,while longitudinal thermal conductivity is reduced to strengthen thermal protection,thus playing an important role in thermal protection,heat storage and heat preservation. This study successfully fabricated a functional fabric(M-Ag@TBNP-T)with a macro-micro hierarchical gradient structure using polyester(PET)fabric as the substrate,waterborne polyurethane as the matrix,and titaniumate-modified boron nitride along with silver nanoparticles as functional fillers through a vacuum impregnation-heat setting-hot pressing composite process.A systematic investigation was conducted to examine the influence of the gradient structure on the coating properties,with comparative analyses performed against pure PET samples and commercial phase-change cooling agent-treated polyester samples(PCM-T).Experimental results demonstrate that the constructed macro-micro multi-gradient structure significantly enhanced the thermal conductivity of the coating.The thermal conductivity of the M-Ag@TBNP-T functional fabric reached 5.71 W/(m·K),representing a 349%improvement compared to the original PET fabric.The excellent thermal conductivity facilitates rapid heat diffusion and transfer,thereby endowing the fabric with superior contact cooling sensation.The cooling coefficient increased to 0.27 J/(cm2·s),marking a 237.5%enhancement over pure PET fabric.Furthermore,the incorporation of silver nanoparticles imparted remarkable biological inhibition against both cocci and bacilli.After 500 friction cycles,the fabric exhibited a minimal mass loss of 1.80 mg,corresponding to a loss rate of 3.18‰,demonstrating exceptional abrasion resistance and reliability of the M-TBNP-T functional fabric. Although a lot of work has been done on the development of high thermal conductivity fabrics and certain results have been achieved,with the increasing demand for outdoor adventures and extreme challenges from young groups,more diversified functional requirements have been put forward for outdoor apparel products.In view of the diversification of application scenarios and needs,the research and development of high thermal conductivity fabrics provide key ideas and technical paths for the development of the next generation of intelligent temperature-controlled textiles.