共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
鉴于材料表面容易出现各类有害菌,导致材料被腐蚀,而且这些有害菌大量繁殖还会进一步威胁环境安全与人们的身心健康。研究借助于诸多反应完成基于季铵化聚甲基丙烯酸二甲氨基乙酯接枝的琼脂糖(Agr-g-QPDMAEMA)抗菌剂制备,并对其抗菌性加以分析。借助于四苯乙烯(TPE)与抗菌多肽衍生物共同进行“硫醇-烯烃”加成反应,从而完成TPE-AMP抗菌剂制备。这种抗菌剂能够实现聚集诱导发光效应,在接触细菌之后,荧光信号就会产生改变,这样就能从微观层面展现该抗菌剂与细菌膜的作用,从而对其抗菌效果进行分析。 相似文献
3.
通过对原料的选择和配方的优化,制备了一种季铵盐型抗菌洗手液。该洗手液配方(以质量分数计)由0.75%十二烷基聚氧乙烯醚硫酸钠(AES),2.25%十四烷基甲基二羟乙基溴化铵(TMDAB),20%椰油酰胺丙基甜菜碱(CAB-35),0.25%醇醚磺基琥珀酸单酯二钠盐(MES),1.5%椰子油二乙醇酰胺(6501),1%甘油,0.1%二羟甲基海因(DMDMH),少量香精及色素,少量柠檬酸调p H和余量的蒸馏水组成。经过测试表明该洗手液对大肠杆菌和金黄色葡萄球菌的杀菌率达到99.99%和100%,产品稳定性、起泡性好,生产成本较低,与市售的某些抗菌洗手液相比,该洗手液显示出一定的优越性。 相似文献
4.
季铵化聚乙烯亚胺/SiO_2微粒的制备及其抗菌性能 总被引:1,自引:0,他引:1
通过4-溴丁酰氯的媒介,将水溶性聚乙烯亚胺(PEI)接枝在纳米SiO2表面,分别用1-溴己烷和碘甲烷对接枝的PEI进行N-烷基化修饰,使PEI中的部分氨基转变成季铵盐,得到水不溶性季铵化聚乙烯亚胺(QPEI)/SiO2微粒,其中PEI接枝量质量分数为14.8%,季铵化的氨基质量分数22.8%。红外光谱分析证实PEI接枝在纳米SiO2表面,随后成功地被卤代烷N-烷基化修饰。透射电镜观察发现QPEI/SiO2的形态不规则,大多数颗粒团聚成200—300 nm的微粒。抗菌检测结果表明,QPEI/SiO2微粒对金黄色葡萄球菌(S.aureu)和大肠杆菌(E.coli)的最小抑菌质量浓度(MIC)分别为80μg/mL和1 200μg/mL。QPEI/SiO2微粒破坏了细胞的完整性,最终将整个细胞分解成碎片。 相似文献
5.
6.
聚硅氧烷季铵盐的合成及其抗菌性 总被引:6,自引:0,他引:6
以六甲基二硅氧烷(MM)为封头剂,氢氧化四甲铵的硅醇盐为催化剂,使N,N-二乙基-氨丙基甲基二甲氧基硅烷通过水解再和八甲基环四硅氧烷(D4)制得叔胺基硅油,再以氯化苄为季铵化试剂.合成了聚硅氧烷季铵盐。应用IR和^1NMR对产品结构进行了表征,结果与预期值基本吻合。该产品具有明显的表面活性剂性能,测得其临界胶束浓度cmc为0.05%,最小表面张力σcmc为44.8mN/m。抑菌圈实验表明:产品对大肠杆菌有优良的抗菌性,对霉菌有一定的抑制作用。AATCC100抗菌实验表明:质量分数大于0.5%的聚硅氧烷季铵盐水溶液对大肠杆菌的抑菌率达到了100%。 相似文献
7.
8.
尼龙6用4-溴丁酰氯活化,再与高分子聚乙烯亚胺(PEI)在有机溶剂中进行反应,使PEI共价接枝在载体上,然后用卤代烷对接枝在尼龙6上的PEI进行烷基化反应,使其形成具有杀菌功能的高分子季铵盐,制备出尼龙树脂固定化的高分子抗菌杀生剂。高分子抗菌杀生剂的抗菌灭藻性能的检测结果表明,作用30min对贵阳市雅河水中的异养菌、氨化细菌、反硝化细菌、亚硝化细菌的杀菌率在90%以上,真菌、硫酸盐还原菌的杀菌率在85%以上;对黑曲霉的杀菌率在84%,其作用24h可将小球藻基本杀灭。 相似文献
9.
季铵盐高分子抗菌剂的制备及其在PP中的应用 总被引:1,自引:0,他引:1
以氯球(交联氯甲基聚苯乙烯)为载体,将其与含有不同取代基的三元胺进行季铵化反应,制备了一系列不溶性的季铵盐高分子抗菌剂(P型抗菌剂).红外光谱分析表明产物为目标产物.探讨了取代基结构、反应条件对季铵盐抗菌剂反应活性的影响.抗菌测试结果表明:抗菌剂的抗菌性能随取代基碳链长度的加长而增强.并从抗菌性能、力学性能、微观结构及结晶形态几个方面研究了含三乙醇胺的季铵盐抗菌剂对PP抗菌材料各项性能的影响.结果表明:复合材料对大肠杆菌、八叠球菌的抑菌率分别可达83.19%和86.92%,且P型抗菌剂有利于提高PP的冲击强度和弹性模量. 相似文献
10.
11.
A series of dimethylaminopropyl benzyl chloride grafted polysiloxanes (PDMS-g-BCs) with tunable molecular weights and cationic content were synthesized, and the effect of polymer structure on the antimicrobial activities against bacteria (Escherichia coli (E. coli) and Staphylococcus albus (S. albus)) and phytopathogenic fungi (Rhizoctonia solani (R. solani) and Fusarium oxysporum f. sp. cubense race 4 (Foc4)) were systematically assessed. The antibacterial activity was evaluated by determining the minimum inhibitory concentration (MIC) against E. coli and S. albus by the broth dilution method, and the antifungal activity was measured by mycelia growth inhibition as well as by the MIC and minimum fungicidal concentration (MFC) values. The molecular weight and cationic content were major determinants of the activities of PDMS-g-BCs; when the molecular weight was approximately 2500 g/mol and the cationic content was approximately 20 mol% of the total siloxane units, PDMS-g-BCs gained strong antimicrobial activities toward both E. coli and Foc4, comparable to those of a commonly used broad-spectrum microbicide benzalkonium chloride, making PDMS-g-BCs promising fungicidal agents for plant disease control. 相似文献
12.
Three series of acrylamide monomers/polymers containing quaternary ammonium salts (QASs), i.e., acrylamide QAS monomers (QDs), homopolymers of QDs (PQDs) and copolymers of QDs with acrylate monomer (PQDCs), were synthesized and employed in antimicrobial tests against both bacteria (Escherichia coli (E. coli) and Staphylococcus albus (S. albus)) and phytopathogenic fungi (Rhizoctonia solani (R. solani) and Fusarium oxysporum f. sp. cubense race 4 (Foc4)). The antibacterial activity of the QASs was evaluated by determining the minimum inhibitory concentration (MIC) against E. coli and S. albus by the TTC coloration method, and the antifungal activity was measured by mycelia growth inhibition as well as MIC and the minimum fungicidal concentration (MFC) values. The results indicated that PQD homopolymers and PQDC copolymers showed far better antimicrobial activities than QD monomers. PQDC copolymers by incorporating hydrophobic acrylate units into the main chain of polyacrylamide backbone displayed even better antimicrobial activities, depending on QAS structure and hydrophobic content. Moreover, polymers with benzyl group attached to nitrogen atom showed better inhibitory effect on bacteria and phytopathogenic fungi. The results could assist understanding and development of future design of antimicrobial polymers as potential fungicide agents to control plant disease. 相似文献
13.
14.
15.
Salman Gul Maria Saleem Hafiz Adnan Ahmad Ejaz Ahmed Robina Begum 《Journal of Sulfur Chemistry》2021,42(1):15-28
A series of novel 1,2-benzothiazine based quaternary ammonium salts were successfully prepared through different organic transformations. Products of all transformations and final salts were separated out and purified. The product yields were good to excellent for all transformations. Resultant 1,2-benzothiazine based cationic amphiphilic systems were stabilized using different counter anions. All final products were confirmed by 1HNMR and 13CNMR analyses. 1,2-benzothiazine based quaternary ammonium salts have a potential to be employed as a phase transfer catalyst for various reactions in future. 相似文献
16.
季铵盐型抗菌纤维素纤维的辐射接枝聚合 总被引:3,自引:1,他引:2
固相表面接触抗菌材料应用于水的表面接触消毒是一项新的水处理技术,提高材料表面抗菌基团含量将有利于抗菌性能的提高。本研究采用直接辐射接枝和预辐射接枝两种方法,在纤维素纤维表面引入具有抗菌功能的季铵盐聚合物,详细探讨了两种辐射接枝聚合技术以及温度、时间、单体浓度、辐射剂量等具体辐射接枝聚合工艺参数对接枝聚合反应的影响。利用红外光谱(FTIR)、扫描电子显微镜(SEM)对接枝纤维素纤维进行了表征。结果表明,采用预辐射接枝技术可制得接枝率55%以上的高接枝率抗菌纤维素纤维。 相似文献
17.
有机硅季铵盐的制备及其抗菌性能研究 总被引:1,自引:0,他引:1
利用三甲氧基硅烷(WD-930)与二甲基十八烷基烯丙基氯化铵(DAOAAC)进行反应,合成了阳离子抗菌剂[N,N-二甲基-N-十八烷基氨丙基三甲氧基硅烷氯化铵(DOATAC)]。以溴酚蓝为指示剂、二氯乙烷为分相溶剂,采用两相化学滴定法测定DOATAC的含量;用红外光谱(FT-IR)、元素分析和熔点测定仪等对DOATAC产物进行了理化分析;利用薄层色谱法,对所制备的阳离子抗菌剂的合成路线及其纯化过程进行跟踪;最后对产物的抗菌性能和耐洗性能进行测定。研究结果表明,当抗菌整理液中w(DOATAC)=0.06%时,经该整理液整理的棉布,对金黄色葡萄球菌和大肠杆菌的抑菌率均超过90%,并具有优良的抗菌耐洗性,洗涤50次后其抑菌率仍超过70%。 相似文献
18.
含氟季铵盐表面活性剂是一类具有高表面活性、高耐热稳定性、高化学稳定性和憎水、憎油等特殊性能的表面活性剂。该文通过测定不同时间、不同种类的油相、不同质量分数的表面活性剂以及不同无机盐添加比例对油水界面张力的影响以及不同浓度的含氟季铵盐表面活性剂水溶液在石蜡、金属铁等不同固体表面上的接触角,对其动态界面张力以及润湿铺展性能进行了研究。结果表明:界面张力值通常在10min后基本达到平衡,且用渤61#油做油相时,界面张力值较低,效果比较好;随着表面活性剂质量分数的增加,界面张力先减小,达到一个最低值后渐渐趋于平缓;无机盐的加入使得界面张力先降后升,在NaCl质量浓度为50~80g/L内均降至低界面张力,最低值达到0.0531mN/m;同时,在典型的具有强疏水性的低能表面石蜡上的铺展性能优良。该研究为其在水溶性场合的应用提供了实验数据。 相似文献
19.