| As the development and improvement of living standard, the demand of functional taxtile is getting higher and higher as well as the voice of " Return to Nature", which, to some extent, promotes the development of functional textiles. Natural wool fiber is known as superior textile material which has been widely used for long in human being history. But natural wool fibre is not antibacterial and wool textile can provide living space for bacteria, which is harmful to health and environment. Thus, it becomes an importent challenge to make wool fiber antibacterial. At the same time, it is reported that:some fragrant smell is able to purify air and physical or mental pleasure. Therefore, it is necessary to research the ecological wool textiles of antibacterial and fragrant function. In this paper, WG-CT as antibacterial finishing agent extracted from vegetable WG and MHZ fragrant microcapsule as fragrant finishing agent are selected to treat wool fabric, research the influence of different composite finishing process on antibacterial property as well as the persistence of antibacterial and fragrant property. Finally the antibacterial mechanism is discussed.Through the above reseach, there are following conclusions.(1) Through the analyse of single factor for experiment, the natural antibacterial WG-CT was finished on fabric, it was found that the optimal antibacterial agent concentration was 200%(owf), the optimal finshing time was 60min; and under different composite ratio, when the ratio was 2:1 between WG-CT and another natural antibacterial KF-CT, the antibacterial property both reached optimal level; when under different metal ions (Fe2+,Al3+,Ca2-,Sn4+) pretreated, Al3+ had the least bad effect on antibacterial property.(2) The fabric was treated fragrant finishing on the basis of antibacterial finishing, as the finishing temperature increased, the antibacterial property of fabric had a decreasing trend, the finishing time and the microcapsule finishing agent concentration had no effect on the antibacterial property.(3) The fabric was naturally placed 12 weeks, the fabric still had good antibacterial property to Staphylococcus Aureus; After washing 15 times, fabric had good washable persistance. Compared to Staphylococcus Aureus, the washable resistant was very weak to Escherichia Coli. The fabric had a slow release of fragrance when under natural placed condition. After natural placed 10 weeks, the fragrance of fabric was very weak.When under washing condition, as the washing times increased, the fragrance of fabric declined largely, after washing 10 times, the fragrance of fabric was very weak.(4) The combination mechanism of antibacterial agent in the wool fiber was studied by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). The results showed that the antibacterial agent was mainly distribute in the amorphous region of the fiber. The antibacterial agent in antimicrobial wool fiber which was pretreated with metal ions could form stable complexes with metal ions or wool fiber and distributed on the surface of the fiber or in the amorphous region of the fiber. And the TGA results showed all the fine qualities of the wool were not repressed by these antibacterial and fragrant finishing.In conclusion, the antibacterial finishing and fragrant finishing had no bad effect on the nature of wool fiber when brought new function to fabric, which was worth for promting in the market. |
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