Preparation Of Argy Wormwood Oil Microcapsules And Antimicrobial Finishing Of Cotton Fabrics

In this paper, it conducted a series of studies on the preparation process ofcomplex coacervation prepared wormwood essential oil microcapsu les, theperformance of microcapsules and cotton fabric finishing process; In a certaintemperature, determine optimum temperature of emulsification is40℃throughtesting heating and cooling viscosity values of gelatin-gum arabic solution.Investigate the impact on the preparation of microcapsules of the emulsification,complex coagulation, low temperature alkalization processing and curing process.Determine the optimum preparation is that emulsification rate is4000r/min,emulsification time is15minutes; Complex coacervation speed is3000r/min,complex coacervation time is30minutes, optimal pH value should between3.8～4.0; The alkalization processing20minutes is appropriate under the conditions ofpH value is9.0and temperature of0-5℃; The curing process is that using10g/Lof tannic acid cured for4.5h after using glutaraldehyde sol, for E. M.,~25%inH2O cured for3h.The argy wormwood microcapsules surface is continuous and porous and thewall has a semi-permeable and release properties which prepared by complexcoacervation method. Appearance form of microcapsules was observed byscanning electron microscopy, and calculating the article size of themicrocapsules.The particle size distribution of3μm～12μm, the average size ofthe microcapsules is about6.5μm; The oil content of microcapsules is84.61%andthe utilization rate of the argy wormwood essential oil is99.35%; Compared argywormwood essential oil, wall material, blank microcapsules and argy wormwoodessential oil microcapsules infrared spectral curve similarities and differences, inorder to determine the argy wormwood essential oil has been wrapped by wallmaterial. To study the dispersion process of the microcapsules base on three factors, such as the dispersing rate, the dispersion time and the amount ofdispersant.Microcapsules may be evenly dispered in water when the dispersionrate is3000r/min, the dispersion time is15minutes, and the amount of thedispersing agent is2g/L; The sustained release property of microcapsules wascharacterized by testing the essential oil content of microcapsules which wereplaced in different time. Antimicrobial properties of different concentrationsmicrocapsule dispersion liquid were tested, accor ding this to select theconcentration range of microcapsules used in cotton fabric finishing. When theconcentration of microcapsule dispersion is10g/L, the Bacteriostatic rate ofEscherichia coli and Staphyloccocus aureus can reach more than99.50%.Using water-soluble polyurethane bonded to the microcapsules on the cottonfabric, testing the chromaticity, wrinkle recovery angle, permeability, tensileproperties and antibacterial properties. To determine the optimum technology ofusing argy wormwood essential oil to finish the cotton fabric by antibacterialperformance: microcapsules is30g/L, water-soluble polyurethane is100g/L, andbaking3minutes at130℃. The finishing cotton fabric Bacteriostatic rate ofEscherichia coli and Staphylococcus aureus reached97.42%and95.70%; Thecotton fabric antibacterial rate can still reach more than85%after placed35days,the bactertiostatic rate still at more than80%after50times washes; It show thatfinished fabric by microcapsules has a good antibacterial durability.