共查询到20条相似文献,搜索用时 93 毫秒
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本研究使用的多孔性陶瓷板基材主成分为氧化铝及二氧化硅,包覆的纳米涂料则包含TiO2,SiO2及A12O3的纳米颗粒.由不同的配方测试找出最佳涂布条件,使纳米涂层能直接涂布并经自然干燥而紧密包覆于陶瓷基板上,达到抗菌除藻防污的功效.实验结果显示,使用的纳米涂层其厚度约为100 nm,经过1 000次细海绵的洗刷,依然保有约80~90 nm左右的厚度.在抗菌测试方面,使用大肠杆菌作为实验菌株经过24 h的培养,包覆纳米涂层的陶瓷板能够有效的将菌数从1.42×105降低至7.86×103 cfu/mL,抗菌率达到99.99%.将纳米镀层的陶瓷板置于充满绿藻的鱼缸中,经过60 h后可以有效的清除鱼缸中的藻类,恢复鱼缸中水质的澄清.此技术可将多孔性陶瓷板制造成各种成品配件应用于水产养殖或是观赏鱼缸的抗菌除藻. 相似文献
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植入医疗器械的感染是临床治疗的难题之一,因此研究具有长效稳定抗菌效果的医用涂层对于医疗植入器械领域十分重要。本研究使用细菌纤维素膜片,通过粉碎―氧化法制备氧化改性细菌纤维素纳米晶体,并化学接枝阳离子化合物双胍制备获得新型纳米抗菌材料NBC-BG,最后与聚氨酯(PU)进行复合制备了PU-NBC-BG医用抗菌涂层。通过多种材料表征手段,研究了不同比例添加下涂层的结构性能变化,同时通过抗菌实验证明了PU-NBC-BG涂层具有优良且稳定的抗菌性能以及抗生物膜效果,在医疗器械领域具有很好的前景。 相似文献
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石墨烯作为新型材料成为腐蚀防护领域中的研究热点。在简述了石墨烯薄膜的防腐性后,通过石墨烯衍生物在有机防腐涂层中的不同作用,综述了石墨烯衍生物通过增强涂层屏蔽性、附着力以及促进电化学保护等方式提高涂层防腐性能,以及石墨烯衍生物在涂层自修复、导热性和抗菌性等方面的研究。介绍了石墨烯有序排列对优化涂层阻隔性能的影响。 相似文献
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介绍了通过共沉淀和离子交换的方法,将钛和锌离子共掺杂在羟基磷灰石上而制得的新型抗茵剂,并研究了其对涂料抗菌性的影响及其作用机理.试验结果表明:新型抗茵剂既具有良好的抗菌性能,又不影响涂料的其他性能. 相似文献
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通过共沉淀和离子交换的方法,将钛和锌离子共掺杂在羟基磷灰石上,制备了羟基磷灰石抗菌剂。研究了其与另外3种无机抗菌剂(锌型沸石抗菌剂、银型沸石抗菌剂、氧化钛光催化抗菌剂)在涂料中的应用。结果证明:锌型抗菌涂料对大肠杆菌和金黄色葡萄球菌的抗菌效果较差,其余3种类型抗菌涂料具有很好抗菌效果。但是,银型抗菌剂易引起涂料变色,氧化钛光催化抗菌剂在涂料中难分散且易加快涂料老化,而羟基磷灰石抗菌剂既具有良好的抗菌性能,且对涂料性能没有影响。还介绍了羟基磷灰石抗菌剂的抗菌机理。 相似文献
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Although significant progress has been made in the preparation of mussel‐inspired antibacterial coatings, continual challenges still remain in pursuing more facile and simpler fabrication methods to construct more robust and effective coatings. In this study, quaternized catechol (QCat), which is synthesized via a simple quaternization reaction from two commercially available materials, 2‐chloro‐3′,4′‐dihydroxyacetophenone and N,N‐dimethyldodecylamine, is used as a reactive antimicrobial agent to fabricate mussel‐inspired antibacterial coatings. Specifically, QCat reacts with branched polyethyleneimine (PEI) in Tris‐HCl solution through a cross‐linking reaction between amino and catechol groups to form a homogeneous coating on various substrates via a simple co‐deposition process. The formed PEI/QCat coating exhibits highly effective antimicrobial activity against both Staphylococcus aureus and Escherichia coli and good adhesion on glass, metal, and plastic substrates. Such a simple fabrication process makes it a potential candidate for industrial and medical applications. 相似文献
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Katrina Browne Rajesh Kuppusamy Renxun Chen Mark D. P. Willcox William R. Walsh David StC. Black Naresh Kumar 《International journal of molecular sciences》2022,23(6)
The prevention and treatment of biofilm-mediated infections remains an unmet clinical need for medical devices. With the increasing prevalence of antibiotic-resistant infections, it is important that novel approaches are developed to prevent biofilms forming on implantable medical devices. This study presents a versatile and simple polydopamine surface coating technique for medical devices, using a new class of antibiotics—antimicrobial peptidomimetics. Their unique mechanism of action primes them for activity against antibiotic-resistant bacteria and makes them suitable for covalent attachment to medical devices. This study assesses the anti-biofilm activity of peptidomimetics, characterises the surface chemistry of peptidomimetic coatings, quantifies the antibacterial activity of coated surfaces and assesses the biocompatibility of these coated materials. X-ray photoelectron spectroscopy and water contact angle measurements were used to confirm the chemical modification of coated surfaces. The antibacterial activity of surfaces was quantified for S. aureus, E. coli and P. aeruginosa, with all peptidomimetic coatings showing the complete eradication of S. aureus on surfaces and variable activity for Gram-negative bacteria. Scanning electron microscopy confirmed the membrane disruption mechanism of peptidomimetic coatings against E. coli. Furthermore, peptidomimetic surfaces did not lyse red blood cells, which suggests these surfaces may be biocompatible with biological fluids such as blood. Overall, this study provides a simple and effective antibacterial coating strategy that can be applied to biomaterials to reduce biofilm-mediated infections. 相似文献
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Leticia Esteban-Tejeda Luis A. Díaz Catuxa Prado Belén Cabal Ramón Torrecillas José S. Moya 《International journal of molecular sciences》2014,15(7):13030-13044
The present work presents new bactericidal coatings, based on two families of non-toxic, antimicrobial glasses belonging to B2O3–SiO2–Na2O–ZnO and SiO2–Na2O–Al2O3–CaO–B2O3 systems. Free of cracking, single layer direct coatings on different biomedical metallic substrates (titanium alloy, Nb, Ta, and stainless steel) have been developed. Thermal expansion mismatch was adjusted by changing glass composition of the glass type, as well as the firing atmosphere (air or Ar) according to the biomedical metallic substrates. Formation of bubbles in some of the glassy coatings has been rationalized considering the reactions that take place at the different metal/coating interfaces. All the obtained coatings were proven to be strongly antibacterial versus
Escherichia coli (>4 log). 相似文献
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真空镀膜涂料的研究进展 总被引:1,自引:0,他引:1
随着塑料装饰镀膜技术和塑料代金属制品的不断发展,真空镀膜技术得到了广泛的应用。文章综述了真空镀膜涂料的组成、作用、基本性能,总结了不同种类传统溶剂型真空镀膜涂料(如环氧树脂型、聚氨酯树脂型、丙烯酸树脂型等涂料)的研究与应用,重点讨论了紫外光固化真空镀膜涂料(如聚氨酯丙烯酸酯型、环氧丙烯酸酯型光固化涂料)的发展状况和研究进展,以及真空镀膜涂料的发展前景与趋势。 相似文献