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聚有机硅氧烷—聚丙烯酸酯IPN涂料的合成 总被引:30,自引:0,他引:30
研究聚有机硅氧烷-聚丙烯酸酯互穿聚合物网络(IPN)涂料的合成,并用IR、TG、SEM、GPC及性能测试等方法进行分析.结果表明,该涂料可用作摩岩石刻防风化材料,具有无色透明、硬度高、附着力强、耐酸沉降、耐热老化性好及有优良的透水气性,可避免使用单一有机硅涂料或丙烯酸系涂料造成的“保护性”破坏 相似文献
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有机硅耐磨透明涂层的固化分析 总被引:13,自引:0,他引:13
FTIR、TG、TBA等对有机硅耐磨涂料(有机硅溶胶)的热固化过程研究表明有机硅胶体中缔合羟基间的脱水缩合速率很高;羟基脱水程度与固化温度有关,温度越高,达平衡时羟基的浓度越低,在105~130℃间羟基的浓度变化最大,加入适当的固化剂,对羟基的脱水交联有促进作用,在较高的固化温度下,反应体系中出现了环氧环异构化产生的酮羰基的吸收峰 相似文献
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沈俊建 《理化检验(化学分册)》2007,43(1):70-71
耐磨高铬合金铸铁以其良好的耐磨、耐蚀及耐热性能,得到了广泛应用。因该类样品不易溶解,单个元素分析难以满足快速分析的需要。本文在文献的基础上,采用王水溶解、硫一磷混酸高温下滴加硝酸氧化发烟以破坏碳化物。控制试验条件,对其中的铬、铜、镍、钼、锰采用联合测定,减少了重复操作,提高了分析速度。本方法应用于耐磨高铬合金铸铁中铬、铜、钼、镍、锰的联合测定,结果满意。 相似文献
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《ISO14020国际标准配套涂料技术标准》正式公布,该标准是由国家“十五”科技攻关项《ISO14020国际标准》课题组,将有关的国际标准“中国化”之后的研究成果,主要针对建筑用水性环氧涂料和溶剂性涂料作出技术规范,将在国内涂料行业内推行。 相似文献
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亲水性有机硅杂化防雾涂料的制备及性能 总被引:1,自引:0,他引:1
采用Sol-Gel技术制备了二乙醇胺/有机硅杂化涂料, 并用FTIR、UV-Vis、AFM、TGA及接触角等测试技术对涂料及其涂层进行了分析表征. 结果表明, 该杂化涂料具有良好的成膜性. 由于膜层中存在大量的亲水性羟基基团, 使膜层具有良好的亲水性能和防雾效果. 固化后的聚合物膜层中无机相形成了三维交联网络, 赋予了膜层优异的耐磨性和热稳定性. 相似文献
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Ellen Matthaei-Schulz Tony Flaherty Colm Flannery Tony Randles Odile Lefeuvre Pavel Zinin Laurent Robert 《Mikrochimica acta》2000,133(1-4):11-15
For quantitative assessment of the properties of hard coatings there is an increasing demand for testing methods with high
reliability of the test results, especially concerning the independence of the method and the comparability between different
laboratories. This includes the knowledge about all the factors which influence the test procedure itself, determination of
best testing conditions, testing of these conditions in round-robins to get a view of the comparability of results, and formulation
of guidelines for standardization. In a European project several test methods for hard coatings on steel were investigated
for this purpose and the elastic moduli of the coating and coating thickness were determined non-destructively by means of
quantitative acoustic microscopy. This method and the instruments available had not yet been certified in the fields of coatings
simply owing to the absence of standardised signal processing, followed by the determination of sound velocities and materials
parameter extraction. For this purpose four laboratories carried out investigations and measurements on reference samples
and on two types of hard coatings (titanium nitride and C-doped chromium) on M2 tool steel. 相似文献
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Inorganic–organic hybrid coatings by sol–gel process are very suitable for fighting corrosion. Inorganic sols in hybrid coatings
not only increase adhesion by forming chemical bonds between metals and hybrid coatings, but also improve comprehensive performances
of polymer in the coatings. Different organic polymers or organic functionalities are introduced into gel network to achieve
tailored properties, such as hydrophobic properties, increasing cross-linking density, etc. As for corrosion protection of
metals organic components of hybrid coatings are selected to repel water and form dense thick films and reduce coating porosity.
The factors, such as the ratio of inorganic and organic components, cure temperature, pigments in hybrid coatings, need to
be optimized for attaining hybrid films with the maximum corrosion resistance. Electro-deposition technique offers relatively
thick homogeneous defect-free hybrid coatings in comparison to dip or spin coating techniques. Green cerium ions and non-ionizable
organic inhibitors are more developed in hybrid coatings nowadays than other corrosion inhibitors. Long-term corrosion resistance
techniques of inhibitors are discussed. The inhibitors entrapped in the nanocontainers are doped in hybrid films to prolong
release of the inhibitors to damaged zones, which is discussed in detail. Among all the nanocontainers of corrosion inhibitors
the prospective techniques which show superior corrosion protection are cyclodextrin/organic inhibitor inclusion complexes
and layer by layer assembly of organic corrosion inhibitors in nanocontainers. Super-hydrophobic property of hybrid coatings
derives from low surface tension and surface roughness of hybrid coatings, which endues the films with excellent corrosion
protection for metals, but the durable property of super-hydrophobic coatings needs to be improved for industrial application.
An ideal multiple model of hybrid coatings for superior anti-corrosion of metals proposed is a combination of super-hydrophobic
hybrid coatings and underlying hybrid coatings doped with sustained release of corrosion inhibitors on metal substrates. 相似文献
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《Surface and interface analysis : SIA》2003,35(2):188-198
This paper reports a detailed study of how repeated r.f. magnetron sputtering from a hydroxyapatite (HA) powder target affects the nature and reproducibility of a sequential series of thin‐film coatings deposited onto Ti6Al4V substrates. An evaluation of the effective lifespan of the HA sputter targets and the reproducibility of the calcium phosphate (CaP) coatings produced from them has been made from Fourier transform infrared spectroscopy, XPS and, as appropriate, atomic force microscopy and SEM/energy dispersive x‐ray analyses. The annulus region of the target surface, from which sputtering under r.f. magnetron conditions normally occurs, showed severe surface degradation after only one deposition run, as indicated by significant PO43? and OH? depletion. This deterioration continued after each subsequent deposition cycle but to a much lesser extent than that observed in the initial sputtering period. The layers produced from all of the sputter runs contained the expected Ca2+ and PO43? species characteristic of a CaP system but were OH? deficient in the as‐deposited state. However, the chemical and morphological properties of the coatings did not change significantly until after the third consecutive sputter cycle. Hence, these data indicate that, even though a significant level of degradation of the HA target occurs at the outset of the sputtering procedure, the general plasma conditions employed here have a dominant influence on the coating properties until a critical degradation condition is met. As such, the compacted HA powder targets of interest can have a life‐cycle greater than single usage without detriment to the chemistry and morphology of the coatings produced from them. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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Stefan Kuypers 《Mikrochimica acta》2002,138(3-4):235-247
The possibilities and limitations of electron probe microanalysis and scanning electron microscopy at reduced accelerating
voltages are summarised. The application of electron probe microanalysis to the analysis of thin coatings in the boron–nitrogen–carbon
composition triangle is discussed. Experimental details are given. The potential of modern scanning electron microscopes,
operated at low voltages and high magnifications, for materials development and problem solving is illustrated. Examples shown
are from fluorocarbon coatings, ultrafiltration membranes, membrane fouling and casings for meat. Experimental details are
given. 相似文献
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Hao WANG Xiao Min WU Li Ming TANG Wan Tian DAI Feng You JIN 《中国化学快报》2006,17(10):1401-1404
Super-hydrophobic surfaces with water contact angle (WCA) higher than 150o have attracted great attention these years1, due to their scientific values and potential technological applications as antifouling coatings, non-sticking coatings, and so on. Alth… 相似文献
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E. A. Koblova A. Yu. Ustinov V. S. Rudnev I. V. Lukiyanchuk I. V. Chernykh 《Journal of Structural Chemistry》2017,58(6):1129-1136
A series of Ni- and/or Cu-containing coatings formed by plasma electrolytic oxidation on aluminum and titanium are examined by X-ray photoelectron spectroscopy. Binding energies of core electrons, elemental composition, chemical state of elements, and features of the structural organization of the surface and nearsurface layers of the coatings are determined. A combination of the data collected indicates similar regularities of the composition and significant distinctions in the structure of the coatings formed. It is shown that the coatings formed on titanium are characterized by a considerably higher phosphorus concentration, and correspondingly, phosphates, unlike the coatings formed on aluminum, in which base metal and 3d element (Ni or Cu) oxides are dominant. In both cases, Cu is mainly concentrated in the surface layers of the coatings whereas Ni is mainly concentrated in the near-surface layers. 相似文献
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O.A. Shilova S.V. Hashkovsky E.V. Tarasyuk V.V. Shilov V.V. Shevchenko Yu.P. Gomza N.S. Klimenko 《Journal of Sol-Gel Science and Technology》2003,26(1-3):1131-1135
The approach for improving bending strength of temperature-resistant flexible ceramic electric insulating coatings prepared by sol-gel processing is considered. Starting suspensions, based on both tetraethoxysilane (TEOS)-derived modified sols and highly dispersed fillers such as Cr2O3, are used to deposit the coatings on metals and alloys. Some polymers and organic substances are tested as additives for improving flexibility of the ceramic coatings. The results of study of both bending strength and electrical strength of flexible hybrid organic-inorganic insulation formed on a nichrome wire are discussed. The data obtained on the chemical and phase structure of the coatings, which have been heat treated at temperatures from 95 to 1100°C, using DSC as well as X-ray scattering techniques are presented. 相似文献
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在高强钢表面制备了防护性溶胶凝胶涂层,并研究了不同浓度二氧化硅纳米粒子的加入对于涂层形貌、耐蚀性和硬度的影响。采用扫描电子显微镜(SEM)和电子能谱(EDS)观察了涂层的微观结构和成分;采用显微硬度计测试了涂层的硬度;采用电化学方法研究了二氧化硅纳米粒子的浓度对于涂层耐蚀性能的影响;采用傅里叶红外光谱研究涂层的化学结构,进而探讨了二氧化硅纳米粒子对于涂层的强化机理。结果显示涂层加入二氧化硅纳米粒子的最佳浓度为500 mg.L-1,此条件下的涂层表面均匀致密,有较高的硬度并且在3.5%NaCl溶液中体现出较好的耐蚀作用。纳米粒子在溶胶中反应形成活性羟基基团并与硅烷发生反应生成空间网状结构,从而强化涂层。 相似文献
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Physical Properties of Sol-Gel Coatings 总被引:3,自引:0,他引:3
One of the most important applications of sol-gel technology is the fabrication of coatings. This is because of the possibility of applying oxide coatings with practically all types of chemical compositions at low ambient temperatures on many substrates of various shapes through the use of liquid solutions. Both oxides and different types of organic-inorganic hybrid coatings have been reported. Both oxides and hybrid coatings are usually amorphous at ambient temperatures but some oxides can be converted to the crystalline phase with heating. Regardless of the intended applications of the coatings their physical properties are always of importance. For instance, an anti-reflective coating for an automobile mirror is of little practical value unless it is fairly scratch-resistant. In this review which covers published information in the past fifteen years, some of the more important results of physical properties of sol-gel derived coatings are discussed firstly for oxides and then for organic-inorganic hybrids. It appears that properties such as the hardness of oxide coatings are inadequate unless the heat-treatment temperatures are in excess of about 400°C. The hybrid coatings, especially when they contain a dispersed phase of a hard solid like colloidal silica, can be processed at temperatures below about 150°C and can improve the performance of organic plastics such as the polycarbonates. There is insufficient scientific understanding of the relationship between physical properties and other interdependent variables such as processing conditions, chemistry and coating thickness. More research in this area will undoubtedly contribute to the availability of better and new coatings via the sol-gel approach. 相似文献
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Claus Görsmann 《Monatshefte für Chemie / Chemical Monthly》2005,136(1):91-105
Summary. This paper will give an overview how catalytic coatings are applied in diesel particulate filter systems to support filter regeneration by soot oxidation with nitrogen dioxide or oxygen. Catalytic coatings can be placed on a catalyst substrate in front of a diesel particulate filter, on a filter, or in a combined system on both. Strategies and conditions for successful filter regeneration of those systems will be discussed.This revised version was published online in February 2005. In the previous version the issue was not marked as a special issue, and the issue title and the editor was missing 相似文献