Study On The Preparation And Properties Of Wool Grass Fiber, Yarn And Its Knitted Fabric

Use chemical and laccase to extract carex meyeriana fibers with the carex meyeriana staw as raw material. The chemical degumming method was based on empirical research. Then explore the optimal process of laccase treatment. Put the carex meyeriana fibers extracted by optimal method into spinning. Explore the the optimal spinning method and blended ratio of carex meyeriana/cotton yarns. Then in order to improve the yarn properties on weaving process, used the wrapping method and explore the optimal fineness of outer wrapping yarn and wrapped degree. At last prepare the yarns into knitted fabric and test the properties of the knitted fabric. The research results laied foundation for the carex meyeriana fiber’s using on the knitted products.The optimal laccase parameters were obtained by the response surface method with 14% of laccase dosage,5.5 of the PH and 47℃ of the temperature. The lignin contant, diameter and tensile strength of the carex meyeriana fibers obtained were 7.71% which was decresed by 60.86%,40.06μm which was decreased by 53.04% and 203.46 MPa which was increased by 34.94% compared with the fibers before laccase treatment. The final carex meyeriana fibers were better on both macro and micro propeties. The Super depth of field showed that the carex meyeriana fibers became finer, more uniform and softer after laccase treatment; The SEM and FTIR showed that the gum was decreased and the fibers were more scattering; The crystallinity of carex meyeriana fiber through XRD test was 64.53%; The luteolin contant of the final carex meyeriana fiber was 0.0327mg/g.Use the method of fuzzy and comprehensive evaluation to evaluate the yarn properties of different spinning methods, blended ratios, finenesses of outer wrapping yarn, and wrapped degrees. The result showed that the optimal spinning method was rotor spinning among ring spinning, compact spinning, siro spinning and rotor spinning methods, the better blended ratio was carex meyeriana/cotton 30/70 among the carex/meyeriana 10/90,20/80,30/70 and 40/60 blended ratios, the better fineness of outer wrapping yarn was 28tex among finenesses of 10tex,19tex,28tex,36tex outer wrapped yarns, the optimal wrapped degree was 600 among the wrapped degrees of 500,600,700 and 800.Prepare the best carex meyeriana/cotton yarn into knitted fabric and test the wear-resisting, pilling, bursting, antimicrobial property and warmth retention property. The result showed that the quality loss of knitted fabric was 3.54×10-5g·cm-2 after wear-resisting test, the pilling grade was three, the bursting strength was 362.88N, the antibacterial rate was 22.12%, the warmth retention ratio was 26.59% which was 3.14 times compared to cotton knitted fabric.