锌—铈无机抗菌材料的优化制备及协同抑菌作用研究

发布时间：2018-06-19 23:17

本文选题：抗菌白炭黑 + 锌　；参考：《昆明理工大学》2017年硕士论文

【摘要】：在我们的日常生活中,细菌和病毒的存在会导致许多疾病的产生,因此安全、无毒、无污染的抗菌产品逐渐受到广大消费者的青睐。锌型抗菌材料具有性能稳定,成本低等优点,但其自身抗菌能力较差,通常采用改性来增强其抗菌性能。本论文以白炭黑为载体,锌离子为抗菌离子,稀土铈元素为添加剂,采用溶胶-凝胶法制备得到一种抗菌性能优良的新型锌-铈抗菌白炭黑。通过单因素实验及响应曲面法得到产品抑菌率最佳的制备条件。实验以大肠杆菌为菌种,采用涂布平板法进行抗菌实验。通过SEM、EDS、BET、XPS、ICP、AAS等检测手段对产品进行表征,并初步探讨金属离子锌与稀土元素铈的协同抗菌作用。此外,论文还将锌-铈抗菌白炭黑添加到陶瓷中,得到具有抗菌性能的抗菌陶瓷。结果显示,制备锌-铈抗菌材料的最佳条件为:锌离子浓度为0.83 mol·L-1,铈离子浓度为0.005 mol·L-1,反应时间1.6h。SEM和EDS分析表明,锌-铈抗菌白炭黑结构蓬松,为无定形态,平均粒径较小且分散均匀。由BET检测可知,锌-铈抗菌白炭黑的比表面积为载体白炭黑的两倍多,更有利于作为添加剂添加到制品中。XPS分析表明锌-铈抗菌白炭黑中锌和铈均以氧化物的形式担载在白炭黑载体上。通过计算可知,协同效应因子SEF0,协同系数T/E=1.891,说明锌和铈之间存在显著的协同效应,并通过对锌-铈抗菌白炭黑粉末及浸出液检测得知,稀土元素铈的添加促进了抗菌离子锌的担载和释放,从而提高了材料的抑菌性能。应用研究表明,抗菌粉体材料的添加量是影响抗菌陶瓷的主要原因,当锌-铈抗菌粉体材料的添加量为12.9%(1.25 g)时,抗菌陶瓷的抗菌性能较佳,抑菌率可达45.9%。
[Abstract]:In our daily life, the existence of bacteria and viruses will lead to many diseases, so safe, non-toxic, non-polluting antibacterial products are gradually favored by the majority of consumers. Zinc type antibacterial materials have the advantages of stable performance and low cost, but their antibacterial ability is poor, so modification is usually used to enhance their antibacterial properties. In this paper, a new type of zinc cerium antibacterial silica with excellent antibacterial properties was prepared by sol-gel method with silica as carrier, zinc ion as antibacterial ion and rare earth cerium as additive. Through single factor experiment and response surface method, the optimum preparation conditions of bacteriostasis rate were obtained. Escherichia coli was used as the strain in the experiment, and the antibacterial test was carried out by coating plate method. The products were characterized by means of SEMS-EDS-BET-XPS-ICP- AAS, and the synergistic antimicrobial effects of metal ion zinc and rare earth element cerium were preliminarily discussed. In addition, zinc-cerium antibacterial silica was added to the ceramics to obtain antibacterial ceramics. The results showed that the optimum conditions for preparation of zinc-cerium antibacterial material were as follows: zinc ion concentration was 0.83 mol / L ~ (-1), cerium ion concentration was 0.005 mol / L ~ (-1), reaction time was 1.6 h. SEM and EDS analysis showed that the structure of Zn-cerium antibacterial silica was fluffy and amorphous. The average particle size is small and uniform. The specific surface area of zinc-cerium antibacterial silica was more than twice that of carrier silica. XPS analysis showed that both zinc and cerium were supported on silica in the form of oxides. The synergistic effect factor SEF0 and synergistic coefficient T / E ~ (1.891) indicate that there is a significant synergistic effect between zinc and cerium, and the results are obtained by the examination of zinc cerium antibacterial silica powder and leaching solution. The addition of rare earth element cerium promoted the loading and release of antibacterial ion zinc, thus improving the bacteriostatic property of the material. The application study shows that the content of antibacterial powder material is the main reason of affecting antibacterial ceramics. When the addition amount of zinc-cerium antibacterial powder material is 12.9% 1.25g), the antibacterial property of antibacterial ceramics is better, and the antibacterial rate can reach 45.9%.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB34

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