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A Box-Behnken design(BBD) of response surface methodology(RSM) was used to optimize the preparation of the Zn-Sm antibacterial white carbon black by the sol-gel method. The statistical analysis of the results showed that the particle size of the Zn-Sm antibacterial white carbon black was significantly affected by the reaction time, reaction temperature and the stirring speed. According to analysis of variance(ANOVA), the values of the determination coefficient(R2=0.9821) and the "Pred R-Squared" of 0.8227 were in reasonable agreement with the "Adj R-Squared" of 0.9591. It was indicated that this model could be used to navigate the design space. The optimized reaction time, temperature and the stirring speed were 0.88 h, 87.83 oC, and 473.45 r/min, respectively. In addition, the bacteriostasis rate of the product was about 97.92%. 相似文献
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分子印迹聚合物微萃取是最近一二十年发展起来的一种新型样品前处理技术,集合了分子印迹技术和微萃取技术两者的优势,广泛应用于食品、药物、环境和生物等复杂样品的前处理,其研究也备受关注.本文综述了分子印迹聚合物微萃取技术在样品前处理中的应用进展,包括分子印迹固相微萃取、分子印迹搅拌棒吸附萃取、分子印迹磁性微球萃取和分子印迹整体材料微萃取,探讨了分子印迹聚合物微萃取样品前处理技术存在的问题和局限,并对其应用前景进行了展望. 相似文献
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将铕和金属银离子共同掺杂到白炭黑中,制得一种含稀土新型无机抗菌材料。通过单因素实验得到最佳制备条件为,铕浓度0.005 mol·L-1,反应温度90℃,反应时间1 h。在此条件下制得的铕-银共掺杂抗菌白炭黑对大肠杆菌具有很好的杀菌效果,杀菌率达98%以上。采用XRD、SEM、EDS和FTIR等手段对所制备的样品进行结构形态表征,结果表明产品为无定形态,铕以两种形态存在于材料中,一种与银共生,附着在载体白炭黑上,另一种则游离在材料中,铕和银的添加并没有明显改变白炭黑原有的结构。 相似文献
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In this paper a kind of new inorganic antibacterial material:Cu-antibacterial white carbon black containing lanthanum was synthesized.The characterization and antimicrobial effect of the Cu-antibacterial white carbon black containing lanthanum was investigated.Inorganic antibiotic materials comprised the carrier,the antibacterial ion and the additive.In this study,we choosed white carbon black as the carrier,which was compound by a sol-gel method.Copper ion was selected to be the antibacterial ion,and lanthanum nitrate was selected to be the additive.The as-synthesized Cu-La-antibacterial white carbon black was characterized by inductively coupled plasma(ICP),laser particle size analyzer,Fourier transform infra-red spectroscopy(FT-IR) and antibacterial activity test(Escherichia coli as experimental bacterium).Results showed that the amount of antibacterial ions of the Cu-La-antibacterial white carbon black was higher than that for the general Cu-antibacterial white carbon black.Its bacteriostasis rate was about 98%(when the content of Cu2+ was about 3%),and corresponded to Ag-antibacterial white carbon black(99%).The particle size of Cu-La-antibacterial white carbon black was under 30 μm with a narrow size distribution.Copper ion was bound to white carbon black by ion exchange process.Moreover,this new inorganic antibacterial material showed promising result on the coating surface of metal. 相似文献
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