Papers by Author: Shao Juan Chen

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Authors: Shao Juan Chen, Jian Wei Ma, Yong Jun Sun, Chao Li
Abstract: In this article, two-phase liquid of water and particulates was chosen as medium, and fabric porous material was token as research object. It was proved that ultrasonic would change pore walls of porous materials into the shape of traveling transversal waves. In according to the transmission theory of peristaltic pumping, the flux through those pores would be increased by the deformation. In this article, pores model with alternative varying cross section were built. The analysis was carried out using a perturbation method to get the exact solutions and make an approximate analysis. Finally, the whole calculation process was simulated using the Matlab. It is proved that, although the peristaltic flow induced by traveling waves is very small, but it can not be neglected, because it has the same magnitude of order as the Poiseuille flow. The mechanism of nano materials has nicer embedding effect under ultrasonic was found in this article. Meanwhile, the effect of factors on the peristaltic flow caused by ultrasonic was analyzed. Ultrasonic has been widely used in chemistry, dyeing, finishing and cleaning industries because of its obvious advantages in particle treatment such as dispersion and agglomeration effects etc [1-3]. During recent years, treatment of nano-materials using ultrasonic has been a research hot and many research findings have been achieved in this field[4-6]. Meanwhile, the applications of nano-materials have received considerable attention on textile finishing and some valuable functional textiles such as anti-bacterial and anti-ultraviolet products etc [7]. Fundamental researches have been carried out on the effects of ultrasonic on fine particles [8-11], the results showed that the dispersion effect on fine particles mainly came from cavitation effect closely related to the ultrasonic frequency, power and viscidity of dispersions. Nano-particles were fully dispersed in water and embedded into porous material under ultrasonic action, then we got textiles of practical value, such as nanometer anti-bacteria cotton fabric, photo-catalysts textile etc., which were proved had good antibacterial property and durability[11-12]
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Authors: Shao Juan Chen, Zai Li Wang
Abstract: The thesis selected nano-titanium dioxide compound silver antibacterial and thulium compound nanometer antibacterial as research object, whose application are the widest. Their characters to resist staphylococcus aureus, colon bacillus and Candida albicans were studied by qualitative analysis, quantitative analysis and TEM. The study indicated that nano-titanium dioxide compound silver antibacterial is dissolving antibacterial and thulium compound nanometer antibacterial is non-dissolving antibacterial. These two kinds of antimicrobials both have a minimal inhibitory concentration of the three kinds of bacteria. Different nano-antimicrobials act on bacteria, the changes of bacteria’s shape are different, and this indicates the mechanism of action is different.
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