| Silver anti-bacterial fibers are widely used in medical and health fields, especially in the case of anti-inflammatory and preventing the infection because of its broad spectrum together with efficient and durable antibacterial properties. With the continuous improvement of people’s living standards and overall progress of society, people are paying more attention to kinds of damage caused by environmental problems, especially the infection caused by bacteria’s outbreak. There is an urgent need to be effective in preventing the spread and infection of germs. Then, the development of antibacterial products becomes a great social significance and prospect work.The anti-bacterial hollow fiber with silver particles was studied in this paper, which was produced from the differential pressure effect and silver mirror reaction. Firstly, the properties of silver ions releasing from hollow fiber and its antimicrobial properties were tested. Moreover, modeling the releasing silver ions and modeling the bacterial silver were on the basis of vast experiment. In the end, the preliminary exploration was carried on the application area of hollow fiber with silver particles. Silver particles in the hollow fiber were with the size of 0.1μm to 0.7μm through the observation on the SEM. And the silver particles were only attached on the inner wall of the hollow fiber and not on the outside wall.The silver ions were the principle factor on the antibacterial efficiency. And it was found that length of the fiber, mass fraction of silver, weight of the fiber, the temperature and releasing time of silver ions would have an effect on the diffusion process of silver ions. With the increase of releasing time of silver ions, the concentration of silver ions increased to a stable value. And the more and more heavy fibers and the shorter and shorter fiber results in the increasing mass fraction. The silver transport capacity increases with silver mass fraction. When the hollow fiber with silver particles was under the higher surrounding temperature, the diffusion capacity of the silver ions became more and more. The study also indicated that with the increase of length of hollow fiber, the concentration of silver ions decreased. Then according to the theory of diffusion layer and the related test data, the model of silver ions release was obtained as follows:The effects on the antibacterial properties of hollow fiber with silver particles were studied with the length of silver fiber, the different time of the antibacterial progress, the content of silver particles and the weight of the silver fiber. It was found that when the time of antibacterial progress extended, the antibacterial properties become better and better. Moreover, the antibacterial properties were optimized with the larger weight and the larger content of silver particles. However, the antibacterial properties were declined with the increase of fiber length. According to the model of lotka-volterra and the related test data, the relationship model between the silver ions and bacteria was obtained as follows: And the relation between inhibition rate and time was also achieved with where varied with different bacteria.The application of hollow fiber with silver particles was also studied. At the first, the nonwovens with the different quantity ratio of the silver fiber were prepared with the water thorn. And then, its basic properties and antibacterial properties were detected. The antibacterial properties enhanced with the content of silver fiber in the nonwovens. The absorbing properties and antibacterial properties of the silver/cotton nonwovens were better than those of the silver/polyester nonwovens. However, the breathable properties and softness properties of the silver/polyester nonwovens were better than those of the silver/cotton nonwovens. And when the content of hollow silver fiber ranged from 10% to 20%, the silver nonwovens fundamentally would meet the requirement of the medical dressings. |
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