Study On Moisture Absorption And Quick Drying Properties Of Fabric Based On Surface Morphology

With the gradual improvement of living standards,people have put forward higher requirements for the clothing comfort,and the moisture absorption and quick-drying performance is an important factor affecting the comfort of clothing.Among the current moisture absorption and quick-drying products,fabric products made of natural fibers are becoming more and more popular.linen fabric and bamboo fabrics have good moisture absorption and breathability because their surfaces have uneven texture and rough uneven texture features.Therefore,from a perspective of fabric surface morphology,this paper adopted different fabric weave methods to design fabric topography,and used different topographic fractal methods to characterize the surface structure,and explored its influence on the fabric's moisture transmission and diffusion performance.Firstly,the geometric feature parameters(area of the protrusion,distribution of the protrusion and type of the protrusion)were extracted from the uneven surface topography model,and converted to fabric weave design parameters(area of weave circulation,location of weave distribution,and type of fabric weave),in fabric structure design.9 different basic fabric weaves were used,and sixteen kinds of fabrics with different surface morphologies were prepared by using three different weave design methods,which included jacquard design,field grid design and fractal design.At the same time,according to national standards,25 kinds of fabrics were tested for moisture conductivity and moisture dissipation performance.Secondly,the image processing was used to reconstruct the fabric surface in three dimensions.The three-dimensional topographic images and three-dimensional spatial information of the fabric accurately depicted the surface topography of different woven fabrics.At the same time,different topography analysis methods were used to characterize the surface topography of fabrics.The gray-scale co-occurrence matrix was used to analyze the texture characteristics of the yarn and pores on the fabric surface.It was found that the entropy value of the gray-scale co-occurrence matrix can describe the texture in different directions of the fabric.The larger the entropy value of the matrix was,the more complicated the fabric texture was.The average roughness of the surface of the fabric was used to characterize the dispersion of the displacement distance of the yarn on the thickness side.The results showed that the greater the surface roughness of the fabric,the larger the warp and weft yarn buckling difference of the fabric.The volume porosity was used to describe the occupancy of the yarn in the fabric space.The results showed that the larger the fabric volume porosity is,the more gap and holes between fibers and yarns are in the same fabric volume.Finally,according to the fabric surface structure described by the fabric morphology parameters,the influence of different fabric morphology characteristics on fabric's moisture transmission and diffusion properties were analyzed.The moisture conductivity of the fabrics studied in this subject included wicking height and diffusion area,which were affected by the entropy and roughness of the fabric surface texture,respectively.The gray level co-occurrence matrix described the complexity of the surface texture of the fabric,including the arrangement and distribution of fabric yarns,and the formation of pores.It controls the longitudinal transfer of water molecules across the fabric cross section and affects the expression of wicking performance of the fabric.The research results show that the wicking height of fabrics designed by means of small jacquard increases with the increase of the surface entropy value of the fabric;the wicking height of the fabrics designed by the grid pattern varies with The increase of entropy value first rises and then decreases;the wicking height of the fabric obtained by fractal design increases with the increase of entropy value.The average surface roughness of the fabric describes the change in the height of the warp and weft yarns forming the fabric in space,which controls the transfer efficiency of water molecules on the fabric surface and affects the diffusion area of the fabric.The research results found that the diffusion area of the fabric obtained by the small jacquard design method first decreased,then increased,and then decreased with the increase of the roughness of the fabric;the diffusion area of the fabric obtained by the field-shaped design method decreases first and then increases with the fabric roughness increased;the diffusion area of the fabric obtained by the fractal design method increases first and then decreases with the increase of the roughness of the fabric.The moisture diffusion performance index of the fabrics studied in this paper includes the moisture permeability and the moisture diffusion rate,which are affected by the volumetric porosity of the fabric and the surface roughness of the fabric,respectively.Volume porosity describes the occupancy of fabric pores,controls the number and volume of fabric pores,and affects the diffusion efficiency of water vapor molecules,that is,the moisture permeability of fabrics.Studies have shown that the moisture permeability rate of fabrics formed by the three types of fabric weave design methods has the same trend as the volumetric porosity of fabrics.The moisture permeability rate of fabrics increases as the volumetric porosity of fabrics increases.The surface roughness of the fabric determines the distribution of water molecules on the surface of the fabric and affects the rate of moisture dissipation of the fabric.The moisture dissipation rate of fabrics designed by small jacquard increases with the increase of the roughness of the fabric;the moisture dissipation rate of fabrics designed by the grid pattern increases first and then decreases as the roughness of the fabric increases.And fractal design of the fabric's moisture dissipation rate decreases with the increase of the fabric's roughness first and then rises.