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Preparation of Nanometer SiO2 Inorganic Antimicrobial

Author: WangBin
Tutor: TuMingZuo
School: Sichuan University
Course: Materials Science
Keywords: Nano-SiO2 Ag / SiO2 inorganic antibacterial agent Cu / SiO2 inorganic antibacterial agent Preparation Process Characterization
CLC: TB383
Type: Master's thesis
Year: 2005
Downloads: 164
Quote: 1
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Abstract


In this thesis, nano-SiO 2 powder as a carrier, the use of ion adsorption to the nanometer SiO 2 as the carrier prepared, Ag and Cu < sup> 2 , respectively inorganic antimicrobial agent of the antimicrobial active ingredients. Study 2 Ag and of Cu , 2 adsorption behavior of nano-SiO concluded: the pH of the reaction system, Ag < / sup> Add nano-SiO 2 particle size and specific surface area affect nano-SiO 2 of Ag adsorption an important factor; Preparation of Ag / SiO 2 optimal parameters of the inorganic antimicrobial agent at pH 9 1 Ag amount of 3% of 5 %, the reaction time the 30 6 0min, the reaction temperature was 20 4 0 ℃; for Cu / SiO 2 inorganic antibacterial agent , in pH10 copper ammonia solution, Cu 2 amount of impact the nanometer SiO 2 Cu 2 adsorption of important factors. 2 inorganic antibacterial chemical analysis using X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), the electronic transmission electron microscopy (TEM) Ag / SiO characterized to study the microscopic structure of the agent the calcination temperature silver adsorption amount 38.6mg / g Ag / SiO 2 inorganic antibacterial agent Ag dissolution performance, antibacterial properties investigated antibacterial lasting performance results show that: 700 ° C roasting from the Ag / SiO 2 inorganic antibacterial agent has a good Ag dissolution performance, excellent and long-lasting anti-bacterial properties The reason for this temperature download body SiO 2 and the state of presence of the silver element can effectively control Ag of the dissolution rate, so that samples having the good Ag slow-release characteristics. 2 stability studies of the inorganic antibacterial agent, the sample having a certain color stability, good acid resistance and thermal stability of the Ag / SiO . By XPS were used to characterize the microstructure of the Cu / SiO 2 inorganic antibacterial agent, and the results showed that: when the copper adsorption capacity of 63mg / g, calcination temperature of 500 ° C, the sample copper in the presence of state The m · CuO · nSiO 2 (m, n is a positive integer, and M GT; n). 2 MIC of inorganic antibacterial agent against E. coli and Staphylococcus aureus are 75mg / L, the coated samples of these two bacteria MIC testing of microbiological analysis testing center in Guangdong Province, the Ag / SiO are

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