Twist leads to yarn torsion, which influences the physical and mechanical properties of yarn or fabric directly. In this paper, according to the basic principle of space geometry, the space geometric model of yarn was...Twist leads to yarn torsion, which influences the physical and mechanical properties of yarn or fabric directly. In this paper, according to the basic principle of space geometry, the space geometric model of yarn was established, then the linking number,twisting number, and writhing number of elastic rod model were defined. The reason of yarn snarling was analyzed based on the energy, and the relation between yarn snarling and yarn torsion was studied according to White formula. The results show when tow ends of yarn are fixed, the linking number is constant, which means the sum of twisting number and writhing number for yarn torsion deformation and bend deformation is constant.展开更多
In order to analyze the effect of the spinning triangle on yarn structure,a shape model of the spinning triangle is established.The fiber motion in the spinning triangle can be divided into three stages,and the relati...In order to analyze the effect of the spinning triangle on yarn structure,a shape model of the spinning triangle is established.The fiber motion in the spinning triangle can be divided into three stages,and the relationship between yarn structure and fiber duration as well as the force acting on the fibers in the three stages is analyzed.The fiber elongation in different location of the spinning triangle is variational.The difference is that the elongation of fiber in the middle spinning triangle is bigger than that in the edge of it and the difference will be amplified with the increase of spinning triangle width,which has an effect on the characteristic of yarns structure.Research results for further study on compact yarn structure and improving spinning frame structure provide theory basis.展开更多
The fiber stress and elongation after the yam twisting has been analyzed in this paper. A method has been proposed to improve the strength of compact spinning yam. A structure model of the interference compact spinnin...The fiber stress and elongation after the yam twisting has been analyzed in this paper. A method has been proposed to improve the strength of compact spinning yam. A structure model of the interference compact spinning yarn was established. It theoretically proves that interference compact spinning yarn has higher strength than that of traditional compact spinning yarn.展开更多
To enhance the bonding strength between the active material and the core yarn current collector through nano-entanglement,bacterial cellulose/carbon nanotube(BC/CNT)nanofiber yarns were developed using in situ cultiva...To enhance the bonding strength between the active material and the core yarn current collector through nano-entanglement,bacterial cellulose/carbon nanotube(BC/CNT)nanofiber yarns were developed using in situ cultivation and wet twisting.This method utilizes the large specific surface area and abundant active functional groups of BC-based nanofibers.Subsequently,V2O5/BC/CNT composite yarn electrodes were fabricated,exhibiting a core-sheath structure with excellent conformal characteristics.The influence of ultrasound duration on the conductivity and electrochromic performance of composite yarns was investigated.The initial discharge-specific capacity was recorded as 105.3 mAh/g,with a capacity retention rate of 60.2%after 100 cycles.The composite yarn exhibited 100 reversible transitions between yellow and blue,with reduction and oxidation response times of 2.35 s and 3.3 s,respectively.The modulation amplitude at 532 nm during the initial cycle was 20.31%,and after 100 cycles,the modulation amplitude retention rate remained at 68%.展开更多
基金the Fundamental Research Funds for the Central Universities,China
文摘Twist leads to yarn torsion, which influences the physical and mechanical properties of yarn or fabric directly. In this paper, according to the basic principle of space geometry, the space geometric model of yarn was established, then the linking number,twisting number, and writhing number of elastic rod model were defined. The reason of yarn snarling was analyzed based on the energy, and the relation between yarn snarling and yarn torsion was studied according to White formula. The results show when tow ends of yarn are fixed, the linking number is constant, which means the sum of twisting number and writhing number for yarn torsion deformation and bend deformation is constant.
文摘In order to analyze the effect of the spinning triangle on yarn structure,a shape model of the spinning triangle is established.The fiber motion in the spinning triangle can be divided into three stages,and the relationship between yarn structure and fiber duration as well as the force acting on the fibers in the three stages is analyzed.The fiber elongation in different location of the spinning triangle is variational.The difference is that the elongation of fiber in the middle spinning triangle is bigger than that in the edge of it and the difference will be amplified with the increase of spinning triangle width,which has an effect on the characteristic of yarns structure.Research results for further study on compact yarn structure and improving spinning frame structure provide theory basis.
文摘The fiber stress and elongation after the yam twisting has been analyzed in this paper. A method has been proposed to improve the strength of compact spinning yam. A structure model of the interference compact spinning yarn was established. It theoretically proves that interference compact spinning yarn has higher strength than that of traditional compact spinning yarn.
基金the National Natural Science Foundation of China(22305206)Autonomous Region Natural Science Foundation(202110120008).
文摘To enhance the bonding strength between the active material and the core yarn current collector through nano-entanglement,bacterial cellulose/carbon nanotube(BC/CNT)nanofiber yarns were developed using in situ cultivation and wet twisting.This method utilizes the large specific surface area and abundant active functional groups of BC-based nanofibers.Subsequently,V2O5/BC/CNT composite yarn electrodes were fabricated,exhibiting a core-sheath structure with excellent conformal characteristics.The influence of ultrasound duration on the conductivity and electrochromic performance of composite yarns was investigated.The initial discharge-specific capacity was recorded as 105.3 mAh/g,with a capacity retention rate of 60.2%after 100 cycles.The composite yarn exhibited 100 reversible transitions between yellow and blue,with reduction and oxidation response times of 2.35 s and 3.3 s,respectively.The modulation amplitude at 532 nm during the initial cycle was 20.31%,and after 100 cycles,the modulation amplitude retention rate remained at 68%.
