Development of multifunctional porous sound-absorbing foam-coated fabric with UV resistance and heat preservation
Polyurethane-based porous sound-absorbing foam-coated fabrics were prepared by a coating method,with cotton fabric as the base fabric,water-based polyurethane as the matrix,sodium dodecyl sulfate as the foaming agent,and nano-silica as the functional particles.The effect of foaming agent content on pore size,porosity,open porosity,and sound absorption coefficient is investigated.The UV resistance,heat preservation performance,wear resistance,tensile frac-ture properties,moisture permeability,and hydrostatic pressure resistance of the coated fabric were tested using different functional particles(nano-silica,nano-titanium dioxide,graphite,hollow glass microspheres)as fillers.The results show that with the increase of foaming agent content,the porosity of polyurethane foam coating increases significantly,and the pore size and open porosity also increase accordingly,thereby improving the sound absorption performance.When the foam-ing agent content is 6%,the sound absorption coefficient of the coated fabric can reach 0.48,and the average sound absorp-tion coefficient in the full frequency band reaches 0.25.The UV transmittance of the coated fabric is less than 0.1%,indi-cating excellent UV resistance.The thermal conductivity was less than 0.12 W/(m·K),showing good heat preservation ef-fect.The breaking strength is 865.76 N,and the elongation at break is 33.26 mm.Compared with the uncoated fabric,the breaking strength increased by 617.64 N,and the elongation at break increased by 24.59 mm.After grinding 2 000 times on a flat grinding machine,the mass loss of the coated fabric was only 0.55%,indicating excellent wear resistance.The moisture permeability reaches 9 795.05 g/m2/24 h,showing good moisture permeability.
water-based polyurethanefoam coatingUV resistanceheat preservationwear resistancesound-ab-sorbing material
万方数据
维普
