Preparation and Characterization of Cu-Ag-inorganic Antibacterial Material Containing Rare Earths

Inorganic antibacterial materials consist of the antibacterial ions, the additives and the carrier. In this study, we synthesized a new inorganic antibacterialmaterial, of which Cu2+ and Ag+ were selected to be the bi-component antibacterial ions, cerous nitrate served as the additives, and the white carbon black was chosen as the carrier, which was prepared by a sol-gel method. The as-synthesized antibacterial material was characterized by inductively coupled plasma, particle size measurement instrument, scanning electron microscope and enumeration tests. The result showed that the amount of antibacterial ions and bacteriostasis rate of this new material are higher than those for the single-ion inorganic antibacterial material. In addition, the particle size of this material can be extended down to 7 μm with a narrow size distribution. Other advantages of this material are its loose and dispersive structure, good thermal and light stability. From the antibacterial experiment in rubber and the coating surface of metal, this new material showed promising results. The possible antibacterial mechanism was also proposed through all the experimental data in this study.

Prediction Model of Antibacterial Activities for Inorganic Antibacterial Agents Based on Artificial Neural Networks

Quantitatively evaluation of antibacterial activities of inorganic antibacterial agents is an urgent problem to be solved. Using experimental data by an orthogonal design, a prediction model of the relation between conditions of preparing inorganic antibacterial agents and their antibacterial activities has been developed. This is accomplished by introducing BP artificial neural networks in the study of inorganic antibacterial agents. It provides a theoretical support for the development and research on inorganic antibacterial agents. Key words inorganic antibacterial agent - antibacterial activity - neural networks - nanometer material

Silver Supported on White Carbon Black Containing Rare Earths as Antibacterial Material

The antimicrobial effect of the Ag-White Carbon Black containing rare earth was investigated. Inorganic antibiotic materials consist of the antibacterial ion, the additive and the carrier. The sol-gel method was used to prepare the white carbon black carrier. Ag+ was selected to be the antibacterial ion, and cerous nitrate was selected to be the additive. They were synthesized on the white carbon black carrier. The structures and properties of antibacterial material were characterized by inductively coupled plasma, particle size measurement instrument, fourier transform infrared and enumeration tests (Escherichia coli as experimental bacterium). Results showed that the amount of antibacterial ions and bacteriostasis rate of this new material are higher than those for the general Ag-antibacterial white carbon black (without containing rare earth). Ag+ was bound to white carbon black by ion exchange process and adsorption process. Bacteriostasis rate is over 99%, and the particle size can be extended down to 7 μm with a narrow size distribution. Other advantages of this material are good thermal and light stability. Furthermore, from the antibacterial experiment in rubber and the coating surface of metal, this new material showed promising results. The possible antibacterial mechanism was also proposed through all the experimental data in this study.

The Self-assembling and Application of Inorganic Anti-bacterial Material Made of Natural Nanoporous Carrier

The inorganic antimicrobial material was inhibited to the microbes with the added metal ion,Zn.The primary wet product carrying 5%-10% zinc ion was generated under the following conditions：temperature was 95 ℃,solution zinc concentration was 1.2-2.0 mol/L,and the ratio of Zn solution to zeolite weight was 5：1.The final stable product was manufactured after baking in an oven for 1-3 h at the temperature of 500-900 ℃.The baked material was tested for its disinfection effectiveness and coloring effect when mixed with paint coating.Based on the final batch of tests,the zinc content of this anti-microbial product was further optimized.

Optimized preparation of zinc-inorganic antibacterial material containing samarium using response surface methodology

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 ℃, and 473.45 r/rain, respectively. In addition, the bacteriostasis rate of the product was about 97.92%.

Synthesis, characteristics, and antibacterial activity of a rare-earth samarium/silver/titanium dioxide inorganic nanomaterials

An inorganic nanomaterials combination of Sm, Ag, and TiO2 was synthesized using supercritical fluid drying （SCFD） combined with solgel techniques. The structure, photocatalysis and bacteriostatic activity of the materials were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, X-ray photoelectron spectroscopy （XRPS）, photocatalytic performance, and antibacterial activity experiments. The XRD results showed that the average particle diameter of Sm/Ag/TiO2 was 14.62 nm and Ag and Sm ions were dispersed on the surface of TiO2 in a highly dispersed, amorphous form. The TEM image showed that the size of the particle was 12 nm using the scherer formula. The XPS result showed that the element Sm was doped and Ag was loaded inorganic nanomaterials successfully. Sm/Ag/TiO2 exhibited optimal photocatalytic properties at 600 oC, the photocatalytic optimal proportion of Sm/Ag/TiO2 was 2：2：100. When the molar ratio was 2：2：100, the bacteriostatic circle diameter was 16 mm for Staphylococcus aureus, the minimum bacteriostatic concentration was 200μg/mL for white beads coccus, and the minimum bactericidal concentration was 2×10^4μg/mL for white beads coccus. The SEM results showed that the antibacterial material attached to the candida albicans cell surface, cells appeared fold deformation. Therefore the inorganic nanomaterials Sm/Ag/TiO2 had high temperature resistance, good photocatalytic and antibacterial characteristics in visible light.

Synthesis,characterization,and antimicrobial properties of Cu-inorganic antibacterial material containing lanthanum

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.

抗菌抗静电SAN材料的制备及应用

以苯乙烯-丙烯腈共聚物(SAN)、无机抗菌剂、抗静电剂、相容剂、润滑剂和玻璃纤维为原料,使用双螺杆挤出机通过熔融共混法制备了兼具抗菌和抗静电功能的SAN材料,拓宽了其应用功能。研究了抗菌剂种类、抗静电剂种类、相容剂用量及润滑剂用量对材料性能的影响。结果表明,相比银离子抗菌剂和银锌复合离子抗菌剂,锌离子抗菌剂对SAN材料具有更好的广谱抗菌效果;3种聚氧乙烯类高分子抗静电剂中,使用6500为抗静电剂时,SAN材料的表面电阻率最低,力学性能最好;当加入质量分数5.0%相容剂苯乙烯-马来酸酐共聚物(SMA)时,材料的综合性能最好;当加入质量分数0.5%的润滑剂双极性乙撑双脂肪酸酰胺(TAF)时,材料的综合性能最好。当锌离子抗菌剂Z30用量0.5%、抗静电剂6500用量10.0%、相容剂SMA用量5.0%、润滑剂TAF用量0.5%时,材料抗菌率达到99.9%,防霉0级,抗白色念珠菌性能优异,表面电阻率1.8×10^(10)Ω,拉伸强度达到96.3 MPa,弯曲强度达到127.5 MPa,弯曲模量达到7253.4 MPa,缺口冲击强度达到6.8 kJ/m^(2);该功能材料已在空调贯流风扇叶上得到应用。

抗菌剂在水处理膜中的应用进展

随着城市工业化进程的加快,环境日益恶化,微生物、细菌滋长等水污染问题严重影响人类的生活及生命安全。在水处理过程中,抗菌膜可以将水中的污染物、细菌与水进行分离。由于污水中存在大量的细菌,可能会附着在膜上并快速繁殖,导致二次污染。基于此,综述了近年来抗菌剂在水处理膜中的应用进展,从无机抗菌剂、有机抗菌剂和天然抗菌剂等方面探讨了水处理膜的抗菌机理,并展望了水处理抗菌膜技术的发展趋势。

不同无机抗菌体系对聚乙烯供水管材抗菌性能的影响

采用双螺杆挤出机将聚乙烯(PE100)分别和纳米氧化锌(15 nm粒径和30 nm粒径)、纳米银、纳米二氧化钛进行熔融共混制备出抗菌PE管材料,并测试了抗菌性能、DSC、拉伸性能和冲击性能。结果表明:纳米氧化锌和纳米银的抗菌体系优于二氧化钛的抗菌体系;15 nm ZnO质量分数0.150%的复合材料对大肠杆菌的抗菌率高于99.9%,30 nm ZnO质量分数0.500%的复合材料对大肠杆菌的抗菌率为99.7%,小尺寸的Zn O抗菌剂有更高的抗菌性能;添加了高含量抗菌剂(质量分数1%的Ti O2)复合材料的综合力学性能降低。

无机纳米抗菌材料开发及其在家居产品中的应用进展

在健康中国战略背景下,具有健康功能的家居产品,如抗菌纤维和抗菌塑料等,由于其良好抗菌性和适用性等受到广泛关注。学术界和企业界根据抗菌材料的特性设计出不同的产品。本文综述了无机纳米抗菌剂的抗菌机理,包括接触反应机理和光催化抗菌机理;无机抗菌剂,如纳米金属物种、纳米氧化物、其他纳米抗菌材料及复合材料的最新进展;抗菌家居产品,如抗菌纺织品、抗菌塑料、抗菌涂料、抗菌陶瓷以及水、气体过滤净化等应用进展。分析表明无机抗菌材料在结构优化、抗菌废弃物回收与毒性研究,以及绿色可持续发展等方面还需高度重视。在未来方向上,本文也指出了可能的发展趋势(如多孔多位点协同抗菌材料开发、双碳政策下绿色工艺开发、居家抗菌产品的简便检测手段和多功能组合产品开发),目前无机纳米抗菌材料应用中存在的问题(如在聚合物中的分散性、兼容性和稳定性),以及展望了抗菌家居产品的市场前景。

空气微生物净化材料研究进展

空气微生物的污染会导致多种疾病的发生,其中致病性微生物严重影响了人体健康和环境保护,常见抑制方法无法满足复杂的需求和环境。新型抗菌材料的出现不仅弥补了常见抑制方法的缺陷,而且因其独特的抗菌机理和持续的抗菌效果,被广泛应用于空气微生物的净化及控制。本文归纳了常见抑制方法的缺陷,并将新型抗菌材料分为无机抗菌材料、有机抗菌材料、复合抗菌材料和光催化材料,阐述其在空气微生物净化领域的研究现状。

强力安全的无机抗菌功能材料

通过对无机抗菌材料的载体、抗菌金属离子及制备工艺的研究，获得了抗菌率高且又安全的系列无机抗菌材料，其中有能耐１３５０℃高温的无机抗菌材料．试验表明，该无机抗菌材料对大肠杆菌、黄色葡萄球菌的最小抑菌浓度ＭＩＣ值均为７５ｐｐｍ，对大、小白鼠的急性经口毒性的 ＬＤ５０＞１００００ｍｇ／ｋｇ，亚急性毒性试验的无异常、无作用的量为 １００ｍｇ／ｋｇ·ｄ．

银系无机抗菌材料研究进展

系统论述了国内外银系无机抗菌材料的研究和应用现状,重点介绍了纳米银颗粒和载银型两类无机抗菌材料,包括它们的种类、制备方法、抗菌机理及其在各种制品中的应用等。纳米银无机抗菌材料制备方法主要有物理法、化学法和生物法,载银型无机抗菌材料根据载体不同分为沸石、蒙脱石、可溶性玻璃、羟基磷灰石和磷酸盐等类型。银系无机抗菌材料在医疗用品、陶瓷、塑料、涂料等制品上已得到大量应用,但其潜在毒性和生物安全性还有待进一步关注。最后提出了银系无机抗菌材料还需深入研究的问题和今后的发展前景。

新型无机抗菌材料:载铜蒙脱石及其抗菌机理讨论

以内蒙赤峰蒙脱石为原料合成了载铜蒙脱石,它对革兰氏阴性菌E.coli和革兰氏阳性菌S.faecalis均有很强的抑止和杀灭作用,其抗菌能力大大优于载铜沸石,蒙脱石在载铜反应后矿物表面带有剩余正电荷,它的抗菌能力来自两方面因素,一方面是矿物对带相反电荷的细菌的吸附作用,另一方面是矿物释放出的铜离子对细茵的杀灭作用,这是载铜蒙脱石抗菌能力优于载铜沸石的本质原因。

纳米无机抗菌材料抗菌性能研究

本文选择了两种有代表性的无机抗菌材料 ,采用抑菌圈实验法对它们的抗菌性能进行了定性研究 ,同时采用细菌总数测定法定量地测试了纳米氧化锌的抗菌性能。并探讨了它们的抗菌机理。

抗菌剂研究进展

该文从有机、无机和有机/无机复合抗菌剂3个方面总结了抗菌剂的种类、抗菌机理、研究现状及前景。大量研究表明,抗菌剂的高效性、安全性、持久性、稳定性等一直是抗菌剂分子设计、应用的目标。该文介绍的天然抗菌剂的衍生化、有机合成抗菌剂的高分子化以及将有机、无机试剂相复合的方法等都是围绕上述目标开展的研究工作,也是抗菌剂发展的方向。

抗菌剂的研究进展

综述了国内外有机、无机、复合抗菌剂研究进展,探讨了抗菌剂在今后几年内的发展方向,指出高分子有机抗菌剂、纳米抗菌剂及复合型抗菌剂将是今后研究的热点。

无机抗菌剂的研究进展

介绍了国内外无机抗菌剂的研究发展现状,重点讨论了各种无机抗菌剂的结构特点以及抗菌机理,阐述了无机抗菌剂在现实生活中纤维制品、塑料、涂料、卫生陶瓷等方面的应用,最后指出了无机抗菌剂存在的问题,预计了将来的一些发展趋势。

无机抗菌剂的研究现状及发展趋势

介绍了无机抗菌剂的研究发展现状 ,评述了各种无机抗菌剂的结构特点及缓释抗菌机理 ,介绍了无机抗菌剂在塑料、卫生陶瓷、纤维制品等方面的应用。同时指出了无机抗菌剂存在的问题及发展趋势。