Study On Pretreatment Process And Product Performance Of Kapok Fabric

The development of green and environmentally-friendly natural fibers is in line with the national concept of strengthening natural environmental protection,loving our beautiful homes,and meeting people's pursuit of healthy wear.Regarding the finishing process of kapok fabrics,although many people have found that the sodium hydroxide used in the cotton fiber pretreatment process has obvious damage to the cell wall of the kapok fiber,no ideal pretreatment technique has been found.In order to promote the development and utilization of kapok fiber resources in China,this paper is committed to promoting the rapid development of kapok taking products,aiming at the characteristics of thin wall and high hollow of kapok fiber,the influence of various chemical reagents in the pretreatment process,and the development of reasonable design.Treatment process and performance evaluation of kapok blended fabrics.The main research contents and conclusions are as follows:1.Pretreatment process design and investigation of damage to kapok fiberBased on the previous research on the alkali resistance of kapok,this project designed three different pretreatment processes to deal with kapok blended knitted fabric under the guidance of the principle of low alkali and alkali.The infrared spectroscopy and scanning electron microscopy were used to analyze the kapok in the blended fabric.The chemical substances(hemicellulose and lignin)content of the fiber and the damage of the cell wall,thereby optimizing the pretreatment process reagents and conditions of the kapok blend fabric.At the same time,further analyze the distribution of hemicellulose and lignin in the kapok fiber.Infrared spectroscopy analysis showed that even 3g/L soda ash could cause obvious damage to hemicellulose and lignin;hydrogen peroxide and tea saponin B-101 had good bleaching effect;when using soda ash to treat kapok fabric,a certain amount of Hydrogen peroxide and stabilizer can not only remove surface waxy oil but also reduce the damage of soda ash to hemicellulose,and have little effect on lignin.It also shows that tea saponin B-101 has less damage to lignin and more damage to hemicellulose.Based on the results of infrared and electron microscopy experiments,it is concluded that lignin may have less distribution in the outer epidermis of kapok fiber,more distributed in the interlayer and spiral gap inside the fiber cell wall,and hemicellulose is more piled up in the outer surface of the fiber cell wall.The surface of the surface cellulose network and the large gap between the skin layer and the body layer.2.Performance evaluation of kapok blended fabricThe joint venture developed two kinds of kapok blended woven fabrics(for shirts and slacks,respectively)and a kapok blended needle-wound fabric(for sweaters),and collected cotton yarns similar to the yarns and fabrics of the various kapok blend fabrics.Comparing the fabric,the second task of this project is to find out the difference in performance between the kapok blend fabric and the contrast cotton fabric.The KES fabric style instrument was used to test the basic mechanical properties of the three pairs of fabrics under low load.Firstly,the feasibility of using the Kawabata style quantitative evaluation formula to calculate the basic style values of the three pairs of fabrics is discussed.It is found that the difference between the mechanical indexes of the samples used in the formula(the winter and summer suit fabrics)is far from the Kawabata formula,and it is not suitable to use the Kawabata formula.The fabric feel was evaluated;therefore,the basic mechanical properties of the kapok blend fabric and its comparative samples were directly compared and analyzed,and the fabric softness,fluffiness,and style were qualitatively analyzed.Secondly,the contact cold and warm and wet transfer properties of the fabric were compared and analyzed.The latter included the wicking effect and the fabric drip diffusion test.The main conclusions are as follows: the blended fabric containing kapok fiber is richer and more fluffy;the style is softer,not as hard as cotton fabric;the kapok blend fabric has a smooth surface and has a touch of microfiber because of the linear density of kapok fiber.Only half of the cotton,the fabric structure has a certain influence on the surface properties;the large specific area of the kapok fiber causes the friction between the fibers and the yarn to be large,and the impact on the shear properties of the fabric is obvious.The fabric is soft to the touch but the shape is crisp,suitable for use.In the shape of shirts and slacks.The kapok blended fabric has a low cold feeling and a strong warm feeling,and is more suitable for use in autumn and winter.The kapok blend fabric has large diffusion area,fast time,high wicking height,fast initial wicking rate and good water guiding ability,which is more suitable for close-fitting.3.Investigation on the growth and development cycle of cotton flower in Panzhihuatest the length of the immature kapok fiber in order to ascertain the length development period of the kapok fiber of the Panzhihua variety.The result is that the planting unit adopts management and protection measures(such as fertilization).,watering,etc.)to promote the growth of fiber length.The length distribution statistics of the fibers in different parts of the immature Panzhihua kapok fruit(about 25-30 days from maturity)and the morphology of the fiber cross-section of liquid nitrogen quenching were observed.Compared with mature kapok fiber,the results showed that the length of immature Panzhihua kapok fiber was close to the length of mature fiber,and the difference was no more than 2mm,indicating that the growth potential of kapok fiber length in subsequent maturity(about 25-30 days)was not great.There are also stratification phenomena in the immature kapok fiber cell wall.Three layers can be seen under scanning electron microscopy,which are inferred to be S,W,and IS,respectively.The wall thickness of immature kapok fiber is about 0.4?m-0.7?m(<mature of mature kapok fiber cell wall 0.6?m-1.2?m),indicating that the cell wall thickness will be further increased in the subsequent maturity stage.In addition,the outer diameter of the immature kapok fiber was observed to be about 15 ?m by electron microscopy(the outer diameter of the mature kapok fiber was about 17 ?m),indicating that the potential for the growth of the kapok cells in the subsequent mature stage was small.