Preparation And Properties Of Antibacterial Yarn Based On Electrospinning

Infectious diseases caused by pathogenic microorganisms threaten human life and health for a long time.Antibacterial textiles can effectively prevent the growth and reproduction of pathogenic microorganisms,thus reducing the transmission of bacteria.However,traditional antibacterial textiles prepared by finishing and fibril method have many problems,such as large amount of antibacterial agent,easy to fall off,low antibacterial efficiency,unstable performance,and complex preparation process,easy to cause environmental pollution.Electrospinning technology is an effective method to prepare nanofibers,which have the characteristics of large specific surface area and high porosity;It provides higher loading capabilities and better antibacterial efficiency for antibacterial textiles.Therefore,in this paper,a new yarn forming process combining electrospinning technology with yarn preparation process was proposed to develop a nanofiber blended yarn forming technology,and functional antibacterial yarn with micronano structure and stable load was obtained.The main research contents are as follows:The antibacterial/far-infrared nanofiber blended yarn was prepared by one-step method by introducing electrospinning technology into yarn forming process.Zinc oxide(Zn O)and silicon dioxide(Si O2)were selected as functional particles to be added to the PU spinning solution.Combination of electrospinning technology and yarn forming process,Zn/Si O2/PU nanofibers were deposited on cotton net to prepare functional antibacterial nanofiber blended yarn.The test results show that when Zn O/Si O2 account for 6 wt% of the mass of PU,the yarn has excellent far-infrared radiation and antibacterial performance,its far-infrared emissivity reaches 0.896,and the antibacterial rate to E.coli and S.aureus reaches 99.99%.After 10 times of washing,the yarn still maintains excellent antibacterial properties.The technology of blended yarn based on nanofiber endows the yarn with excellent functionality,but the addition of inorganic particles affects the process of polymer fiber forming,which limits its wide application.In order to solve these problems,this work presents a new process of producing blended yarn with GO nanofibers by electrospinning/electrospraying the preparation technology of combining with the yarn forming process.The N-halamine precursor 6-phenyl-1,3,5-triazinane-2,4-dione(PTD)was synthesized,and the PTD was grafted onto the PEI-modified GO surface(GO-PEI)using epichlorohydrin as coupling agent,and the efficient,stable and regenerability nano antibacterial material(GO-PEI-PTD)was obtained.Based on the combination of electrospinning/yarn forming process,add electrospraying process,the GO-PEI-PTD composite is firmly embedded in the cotton web using nanofibers,regenerability functional antibacterial nanofiber blended yarn was prepared embedded with GO-PEI-PTD.The bacteriostatic rate of the prepared yarn against E.coli and S.aureus were ?99.99%,within 10 min of contact time,the antibacterial rates were 85% and 91%,respectively.In addition,it has good regenerability and antibacterial durability.After 10 cycles of chlorination and 50 washes,the active chlorine content can still recover more than 95% and 69%.In this study,a new process of preparation functional yarn by electrospinning/electrospraying combined with yarn forming process was proposed,and a series of antibacterial nanofiber blended yarns with high efficiency,durability,stability and reproducibility were developed,the preparation process is simple,environment-friendly and pollution-free,which has guiding significance for the development of new antibacterial textiles.