共查询到18条相似文献,搜索用时 140 毫秒
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纳米纤维素作为一种高值绿色天然聚合物,因其兼具优异的机械性能、可成膜性、高透明度、可生物降解性、生物相容性好等特性,成为无机抗菌原料良好的载体或者基材,这类复合抗菌材料不仅成膜具有一定的机械强度和透明性,而且可提高无机抗菌剂的稳定性,在抗菌功能膜材料领域具有潜在的应用前景。近年来,以纳米纤维素为基体,引入无机抗菌纳米粒子制备纳米纤维素基无机复合抗菌材料成为抗菌新材料的研究热点。基于此,该文着重从纳米纤维素在复合抗菌膜材料制备中的作用与功效,综述了不同无机抗菌纳米粒子与纳米纤维素复合制备纳米纤维素基无机复合抗菌膜材料的研究进展,分析了各类纳米纤维素基无机复合抗菌膜材料的制备及应用优势,最后对纳米纤维素基复合抗菌材料的未来进行了总结和展望,以期为纳米纤维素基有机-无机复合材料的研究提供参考。 相似文献
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M. Vila A.B. Lopes F.A. Almeida A.J.S. Fernandes R.F. Silva 《Diamond and Related Materials》2008,17(2):190-193
A correlation between the generation of extrinsic defects and the stress produced by the thermal expansion coefficient mismatch between CVD polycrystalline diamond films and the substrate material is established. For this, different ceramic substrate compositions with distinct thermal expansion coefficients were chosen in order to provoke diverse extrinsic stress generation. Diamond films were grown by Microwave Plasma Chemical Vapour Deposition (MPCVD) and all the parameters that cause intrinsic stress, as temperature, gas composition, pressure and deposition time, have been fixed to avoid their effect. It was found that defect-free diamond grains are associated with low stressed coatings, while the highly stressed ones contain multiple narrow twins. 相似文献
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超疏水抗菌表面将疏水材料的特殊浸润性能与抗菌材料的优异杀菌性能结合,通过"双重保险"实现建筑、器械、织物等多种材料表面的长久抗菌,对保护人们身体健康及延长材料使用具有重要的作用.该文介绍了无机、有机、无机-有机三类超疏水抗菌表面的制备方法,综述了其在油水分离、涂层防污、医疗卫生应用领域的研究进展,最后对超疏水抗菌表面的发展进行了展望. 相似文献
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Guang-Lei Tan Dan Tang Davoud Dastan Azadeh Jafari Zhicheng Shi Qian-Qian Chu José P.B. Silva Xi-Tao Yin 《Ceramics International》2021,47(12):17153-17160
The present work describes structural, morphological, and antibacterial properties of thin film coatings based on tungsten oxide material on stainless-steel substrates. Thin films were prepared by RF magnetron sputtering of W targets in the oxygen/argon plasma environment in 60 W sputtering power. The characterization of the specimens was made on the basis of microstructure and antibacterial properties of the thin films surface. The effect of O2/Ar ratio on the structure, morphology, and antibacterial properties of the tungsten oxide thin films was studied. Methods such as X-ray diffraction (XRD), scanning electron microscope (SEM), and Fourier Transform Infrared Spectroscopy (FTIR) were used to assess the properties of deposited thin films. XRD peak analysis indicates (100) and (200) of WO3 phase with hexagonal structure. Moreover, the micro-strain, grain size, and dislocation density were obtained. It is noteworthy that by increasing the oxygen percentage from 10% to 20%, the grain size decreases from 81 to 23 nm while the film micro-strain and dislocation density increases. The SEM results illustrates that tungsten oxide thin films are made of interconnected nano-points in a chain shape with sphere-shaped grains with diameter variation from 10 to 100 nm. The FTIR spectra displays four distinct bands corresponds to O–W–O bending modes of vibrations and W–O–W stretching modes of the WO3 films. The antibacterial effects of tungsten oxide thin films on steel stainless substrate against Escherichia coli bacteria are also examined for the first time and our observation shows that the number of bacteria on all tungsten oxide samples decreases after 24 h. The samples exhibit an excellent antibacterial performance. This paper renders a strategy through which the tungsten oxide thin films for antibacterial purpose and proposes that WO3 thin films are ideal for various medical applications including stainless steel medical tools, optical coatings, and antibacterial coatings. 相似文献
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