發(fā)布時(shí)間：2018-06-19 23:17

  本文選題：抗菌白炭黑 + 鋅　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：在我們的日常生活中,細(xì)菌和病毒的存在會(huì)導(dǎo)致許多疾病的產(chǎn)生,因此安全、無毒、無污染的抗菌產(chǎn)品逐漸受到廣大消費(fèi)者的青睞。鋅型抗菌材料具有性能穩(wěn)定,成本低等優(yōu)點(diǎn),但其自身抗菌能力較差,通常采用改性來增強(qiáng)其抗菌性能。本論文以白炭黑為載體,鋅離子為抗菌離子,稀土鈰元素為添加劑,采用溶膠-凝膠法制備得到一種抗菌性能優(yōu)良的新型鋅-鈰抗菌白炭黑。通過單因素實(shí)驗(yàn)及響應(yīng)曲面法得到產(chǎn)品抑菌率最佳的制備條件。實(shí)驗(yàn)以大腸桿菌為菌種,采用涂布平板法進(jìn)行抗菌實(shí)驗(yàn)。通過SEM、EDS、BET、XPS、ICP、AAS等檢測手段對(duì)產(chǎn)品進(jìn)行表征,并初步探討金屬離子鋅與稀土元素鈰的協(xié)同抗菌作用。此外,論文還將鋅-鈰抗菌白炭黑添加到陶瓷中,得到具有抗菌性能的抗菌陶瓷。結(jié)果顯示,制備鋅-鈰抗菌材料的最佳條件為:鋅離子濃度為0.83 mol·L-1,鈰離子濃度為0.005 mol·L-1,反應(yīng)時(shí)間1.6h。SEM和EDS分析表明,鋅-鈰抗菌白炭黑結(jié)構(gòu)蓬松,為無定形態(tài),平均粒徑較小且分散均勻。由BET檢測可知,鋅-鈰抗菌白炭黑的比表面積為載體白炭黑的兩倍多,更有利于作為添加劑添加到制品中。XPS分析表明鋅-鈰抗菌白炭黑中鋅和鈰均以氧化物的形式擔(dān)載在白炭黑載體上。通過計(jì)算可知,協(xié)同效應(yīng)因子SEF0,協(xié)同系數(shù)T/E=1.891,說明鋅和鈰之間存在顯著的協(xié)同效應(yīng),并通過對(duì)鋅-鈰抗菌白炭黑粉末及浸出液檢測得知,稀土元素鈰的添加促進(jìn)了抗菌離子鋅的擔(dān)載和釋放,從而提高了材料的抑菌性能。應(yīng)用研究表明,抗菌粉體材料的添加量是影響抗菌陶瓷的主要原因,當(dāng)鋅-鈰抗菌粉體材料的添加量為12.9%(1.25 g)時(shí),抗菌陶瓷的抗菌性能較佳,抑菌率可達(dá)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%.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB34

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本文編號(hào)：2041772