共查询到19条相似文献,搜索用时 125 毫秒
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以白炭黑(无定型SiO2)为载体,采用水浴加热搅拌法,通过白炭黑负载Zn2+制备抗菌剂前驱体和前驱体焙烧固化制备了白炭黑载锌无机抗菌剂,并将其在涂料中添加制备了抗菌涂料.对Zn2+浓度、白炭黑固含量、混合液pH值、焙烧温度、焙烧时间等抗菌剂制备条件进行了试验考察和优化,对白炭黑载锌无机抗菌剂和抗菌涂料性能进行了测试表征.结果表明,白炭黑载锌无机抗菌剂和抗菌涂料均具有良好的抑菌性,其中,白炭黑载锌无机抗菌剂最小抑菌浓度为:对大肠杆菌19 mg/mL,对金黄色葡萄球菌6 mg/mL;添加8wt%白炭黑载锌无机抗菌剂涂料抗菌率为:对大肠杆菌90.48%,对金黄色葡萄球菌98.77%. 相似文献
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有机硅季铵盐抗菌整理剂的合成工艺研究 总被引:1,自引:0,他引:1
首先以八甲基环四硅氧烷、氨乙基氨丙基甲基二甲氧基硅烷为原料合成氨基聚硅氧烷,最佳反应温度为130℃、反应时间为4 h;再经季铵化制得有机硅季铵盐抗菌整理剂,最佳反应条件为:反应温度80℃、反应时间4 h、氨基聚硅氧烷与季铵化试剂摩尔比1:2.0。织物抗菌整理实验表明,整理后的织物具有良好的抗菌性能,当抗菌整理剂用量为1... 相似文献
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无机抗菌粉体中银价态与抗菌性能研究 总被引:35,自引:2,他引:35
以SiO2为基体,Ag^ 作为主要抗菌成分的无机抗菌剂粉体,控制银离子的含量为n(Ag):n(Si)=0.0286时,在无机抗菌剂中分别引入摩尔分数约30%的Al^3 或60%的Zn^2 ,用于稳定无机抗菌剂中银价态,制备出不变色的无机抗菌粉末。利用XPS技术分析和抗菌性能测试,研究不同温度下抗菌粉体的抗菌性能和银价态关系,揭示含银无机抗菌剂银价态和抗菌性能关系及其机制。研究发现:银离子的价态对粉体的抗菌性能影响很大,当银离子以AgO状态存在时,粉体的抗菌性能较好,若为银单质存在,则抗菌性能下降。Zn^2 的加入,有利于稳定高温时抗菌粉体中的银离子仍以银的氧化物状态存在。 相似文献
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采用化学还原法,以硝酸银(AgNO3)、过氧化氢(H2O2)和聚乙烯吡咯烷酮(PVP)等为原料制备了纳米银粉无机抗菌剂,然后将其加入到聚丙烯酸酯粘合剂体系中制备纳米银粉抗菌整理液,并通过抑菌圈法对其抗菌性能进行了评价。实验结果表明,纳米银粉抗菌剂较佳的反应条件为w(AgNO3溶液)=5%,活化时间为12h,w(H2O2溶液)=6%,w(PVP溶液)=5%,反应温度为40℃,反应时间为3h;当抗菌整理液中银粉浓度为0.5g/L时,对金黄色葡萄球菌的抑菌圈直径为13.1mm,对大肠杆菌的抑菌圈直径为13.7mm。将抗菌试验后的试样放置6个月后,抑菌环仍然清晰未受细菌感染;该纳米银粉无机抗菌剂具有优良的抗菌性能和抗菌持久性。 相似文献
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Bacterial-related infections can be hazardous for human health and the surrounding environment. Traditional antibiotic-based treatments for these infections are increasingly ineffective due to the emergence of antibiotic-resistant bacteria. Antimicrobial peptide mimics have emerged as promising replacements owing to their potency against bacteria and lack of susceptibility to generate resistant cells. Thus, we synthesized a random copolymer, consisting of aminopropyl methacrylamide and benzyl methacrylamide (AB polymer) by random co-polymerization that mimics host–defense antimicrobial peptides. For its use as a coating, the AB polymer is drop-casted onto a cleaned glass substrate and tested for its antibacterial activity toward Escherichia coli and Staphylococcus aureus, wherein almost 99% of antibacterial activity was observed within 5 min. The prepared coating also possessed excellent longevity characteristics of up to 5 weeks. The AB polymer is also able to inhibit biofilm formation as well as disrupt a mature biofilm and can also be employed as an antibacterial wipe for cleaning bacterial contaminated surfaces. Mechanism study through SEM analysis showed that the AB polymer ruptures the bilayer membrane of both bacterial strains, thereby leading to pore formation causing cell death. Cell viability study depicted that 71% of the A549 lung carcinoma epithelial cells are viable compared to 80% on bare glass substrate. Thus, the synthesized AB polymer may be used in a variety of antibacterial applications directly in the form of solution (wipes) or forming a coating (drop casted/spray coated) for battling bacterial colonization. 相似文献
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以麦饭石为载体、Ag+和Zn2+为抗菌离子,通过液相离子交换反应,制备载银锌的麦饭石无机抗菌剂。采用抑菌率对所得产物的抗菌性进行检测,采用XRD、SEM对产物的结构与形貌进行表征,并采用缓释法对产物的耐久性进行研究。实验结果表明:在反应时间为4 h,反应温度为60℃,Ag+和Zn2+浓度分别为0.1、2 mol·L-1,pH值为8的条件下,制备的麦饭石抗菌剂具有优异抗菌性和耐久性。抗菌机理初步分析为通过离子交换或吸附进入麦饭石结构内的Ag+和Zn2+能从载体中持久缓慢地释放出来,与细菌细胞作用,杀灭细菌,从而保持该抗菌剂良好的抗菌能力。 相似文献
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采用化学沉淀法,在模拟体液环境中制备了Na、Mg、F三元素共掺杂的羟基磷灰石( HA)粉体,利用XRD、FT-IR、SEM、EDS等技术对其物相结构、微观形貌、化学组成和热稳定性进行了分析和表征。结果表明:Na/Mg/F对HA进行掺杂引起HA晶格发生畸变。 F元素的掺杂量对HA的形貌具有一定的影响;随着F掺杂量的增加,球形的HA颗粒逐渐转变成棒状结构。 F/P=0.25时,可以制得小而均匀的HA颗粒。抑菌环实验表明Na/Mg/F共掺杂HA对金黄色葡萄球菌的生长具有一定的抑制作用。 F/P=0.25时,抗菌性最强。煅烧温度在1000℃时HA的物相未发生变化,说明样品具有良好的热稳定性。 相似文献
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Preparation,characterization, and antibacterial activities of quaternarized N‐halamine‐grafted cellulose fibers
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A viable method for coating of cellulose fiber with quaternarized N‐halamine is reported in this article. The use of quaternary ammonium salt group in combination with N‐halamine group can reinforce the antibacterial activity. The chemical structure of as‐synthesized N‐halamine precursor 4‐(Bromo‐acetic acid methylester)‐4‐ethyl‐2‐ oxazolidinone (BEO) was characterized by 1H‐NMR. The cellulose fibers were characterized by Fourier transform infrared spectra and X‐ray photoelectron spectra. The spectra data confirmed that the quaternarized N‐halamine‐grafted cellulose fibers were successfully obtained. The antibacterial properties of functional fibers were challenged with both Gram positive and Gram negative bacteria. The antibacterial tests and showed that the as‐prepared antibacterial cellulose fibers exhibited powerful and rapid bactericidal performance against both Gram negative E. coli and Gram positive S. aureus. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42702. 相似文献