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1.
目前,导静电涂料的导电介质多以碳系和金属氧化物为主,不能兼顾涂料的防腐蚀与导电性能,对以碳纳米管(CNTs)作为导电介质和以环氧改性有机硅树脂作为导静电涂料基体树脂的研究均较少.利用环氧树脂改性有机硅低聚物合成了改性树脂,采用红外光谱对产物进行了表征,研究了碳纳米管含量、酸化处理、固化剂、分散剂含量对由CNTs制备的导静电涂料涂膜的导静电性能的影响.结果表明:CNTs含量对提高涂膜导静电性能有影响,CNTs含量为2.0%时导静电性能很好;CNTs酸化处理后涂膜的导静电性能得到明显提高;固化剂聚酰胺650含量为30.0%时,涂膜固化性能和导静电性能最优;分散剂能很好地提高CNTs分散性能,十二烷基苯磺酸钠/改性树脂(质量比)和十八醇/改性树脂(质量比)均在2.0%时达到其最佳效果.  相似文献   

2.
杨明坤  刘斌  夏杰 《材料导报》2018,32(Z2):298-302
导静电防腐涂料是随着科技的进步而迅速发展起来的一种功能性涂料,要求涂料兼具导静电和防腐蚀性能,广泛应用于电子电器、航空航天、石油化工等众多领域。然而,目前我国的导静电防腐涂料还存在无法兼顾导电性和防腐性,以及成本高等问题,综合性能尚不理想,因此研究并提升其综合性能成为该类涂料发展的技术关键。本文论述了本征型与添加型导静电防腐涂料的发展现状,以及各个类型的优缺点,展望了导静电防腐涂料的未来发展前景。  相似文献   

3.
H94阻燃导静电耐温防腐蚀涂料的研究   总被引:2,自引:0,他引:2  
现有石油储罐防腐涂料遇火易燃,耐水性和耐热性较差,影响了推广使用。经材料选择、配方设计和工艺试验,研制成功一种新型阻燃导静电耐温防腐涂料。通过国家权威机构检测和实际使用证明性能良好。文中对影响阻燃导静电耐温防腐涂料性能的因素进行了详细讨论  相似文献   

4.
共轭聚合物复合抗静电油罐涂料   总被引:5,自引:0,他引:5  
鲁照玲 《材料保护》1998,31(2):12-14
利用本征态导电聚合物聚苯胺的优良性能研究一种导静电油罐涂料,以改善目前广泛应用的掺合型导静电油罐涂料在使用中存在的缺陷。  相似文献   

5.
采用了炭黑分散型碳纳米管对非开挖修复用内衬材料进行了改性研究,通过正交试验得到了复合材料的最佳组成,并使材料体积电阻低于108Ω.cm,由电绝缘体变为导静电材料,在保证材料导静电性能的同时,其力学性能也有了较大程度提升。  相似文献   

6.
本文对结合有双偶氮颜料的双层结构光导器件的性能以及电荷传输材料对光电导性能的影响作了综合介绍,对其在静电照像方面的应用前景作了展示。  相似文献   

7.
对热浸镀锌层钝化处理可以进一步提高其外观质量和整体防护性能。六价铬对人体和环境有害,传统的六价铬钝化工艺已经被限制使用,并开发了新的代铬(Ⅵ)钝化技术。分别论述了三价铬钝化、无铬钝化及无机盐/有机物复合钝化技术及其机理的研究进展,分析了其优缺点,并指出了未来的发展方向。  相似文献   

8.
粉体静电起电的试验研究   总被引:4,自引:1,他引:3  
采用静电电荷仪和法拉第筒 ,测定了两种导电性能完全不同的粉体在机械振动筛中静电起电量的参数。结果表明 :无论是导电的金属粉体还是非导电的粮食粉体所产生的静电均已超出《静电安全导则》规定的安全界限  相似文献   

9.
提出使用静电净化器来改善室内空气品质问题。简单介绍静电净化器的装置结构和作用机理。分析静电净化器的技术特点。对比传统纤维过滤器,分析指出静电净化器具有阻力小、作用范围广、运行费用低的优点,应用于洁净空调系统中具有良好的技术优势和经济优势。同时对静电净化器存在的问题进行了分析,建议在静电净化器前加设粗效过滤器、在静电过滤器后加设活性炭纤维层来提高净化效率和降低臭氧浓度。  相似文献   

10.
为了找到制备CuPc ZnS多层复合膜薄膜最佳光电导性能的参数 ,本文研究了CuPc ZnS多层复合膜的CuPc膜层的厚度系列、ZnS膜层的厚度系列的光电导性能和结构 ,利用表面电位衰减仪、紫外 -可见光谱仪和X射线衍射仪等设备分析了复合薄膜的光电导性能和结构及其关系 ,探讨了改变CuPc、ZnS膜层的厚度对CuPc ZnS多层复合膜薄膜的光电导性能和结构的影响  相似文献   

11.
对火工生产静电的危害及对策措施的研究与探讨   总被引:2,自引:0,他引:2  
针对生产过程中静电的产生,提出预防静电产生与消除静电的安全技术措施,从根本上消除静电危害,确保安全生产和产品质量。  相似文献   

12.
新型气源气相起爆系统实验研究   总被引:2,自引:0,他引:2  
选择液化石油气加氧气为气相起爆系统新型混合气源,对其在细长管道内传爆性质进行实验研究。结果表明,新气源在内径3mm长度500m的细长塑料管道内,经激爆形成的爆轰波传爆可靠,爆速达2500m/s,其尾部能可靠激爆多根分叉导爆管;爆轰淬熄直径为07mm。气相起爆器采用气体配比、混合、反射增压、防爆等装置的系统设计是可行的。  相似文献   

13.
The response of Kevlar/epoxy missile motorcase material to low-velocity hard-object impact has been investigated by conducting static indentation and drop-weight single-impact tests. The damage to the composite as a result of these tests was characterized by calculating the absorbed energy from experimental data and visually inspecting the cross-sections of damaged samples. Results indicate that although the principal features of damage due to static indentation are similar to those resulting from drop-weight impact, a larger fraction of the absorbed energy is dissipated under static conditions in plastic deformation.  相似文献   

14.
The quasi-static mechanical response of polymethacrylimide (PMI) foams of density ranging from 50 to 200 kg m−3 is investigated in order to provide experimental data to inspire and validate numerical constitutive models for the response of polymer foams. The macroscopic mechanical response is characterised by conducting quasi-static compression, tension, shear and indentation experiments, whereas microscopic deformation mechanisms are identified by conducting in situ SEM observations during static compression and tension tests; it is shown that foams of low density collapse by cell wall buckling while foams of high density undergo plastic cell-wall bending. As a result, both the elastic and plastic macroscopic response of the foam display a tension/compression asymmetry.  相似文献   

15.
3Cr2Mo塑料模具钢连续冷却相变行为   总被引:4,自引:1,他引:3  
为了调节塑料模具钢3Cr2Mo的组织,以实现在线预硬化,使用Gleeble1500热模拟试验机、光学显微镜以及透射电子显微镜等研究3Cr2Mo钢变形及未变形奥氏体的连续冷却相变行为及相变组织.实验结果表明,3Cr2Mo钢奥氏体稳定性较高,在所研究的实验条件下,连续冷却过程中没有出现先共析铁素体和珠光体,而是发生贝氏体和马氏体相变.热变形使奥氏体发生了机械稳定化,贝氏体相变推迟到较低温度下才完成.随着冷却速度的降低,贝氏体的形态由常规板条状变成粒状,最终可获得粒状贝氏体组织.  相似文献   

16.
Results of experimental studies on the influence of different thermal loading conditions on the resistance of a 15Kh11MFBl structural steel to long-term static and cyclic thermal loading are presented as applied to operating conditions of mineral-processing equipment. It was experimentally established that upon thermal loading of the material, two damage accumulation processes took place: quasistatic associated with directed plastic deformation and fatigue connected with alternating plastic deformation. The effect of overheating on the fracture pattern and resistance to long-term static and cyclic thermal loading was thoroughly investigated. Threshold values of the parameter determining the change of prevailing damage accumulation processes for this steel are shown to be in good agreement with similar values of this parameter for other steels. The results of investigations demonstrate that stresses used as a life criterion describe the lifetime of steel under thermal loading satisfactorily, irrespective of the prevailing damage accumulation process.  相似文献   

17.
This paper reports the use of a non-destructive scanning technique to identify plastic deformation defects generated in steel. The technique is based on measurement of continuous magnetic Barkhausen noise (CMBN). In the experiments described here, surfaces with plastic deformations produced by crushing stresses in a 1070 steel are scanned, and the influence of probe configuration, coil type, scanner speed, applied magnetic field and the frequency band used for the analysis on the effectiveness of the technique is studied. A moving smoothing window based on a second order statistical moment is used to analyze the time signal. The results show that the method can detect the position of plastic deformation defects and distinguish between their amplitudes.  相似文献   

18.
We study the joint effect of hydrogenation and plastic predeformation of 40KhN steel of drill strings after heat treatment on its crack resistance under static and cyclic loads. In the nonhydrogenated state, plastic predeformation of steel only slightly decreases its short-term crack resistance and, owing to crack closure, significantly increases the crack-growth resistance in the near-threshold region. Hydrogenation of the material sharply decreases the short-term crack resistance of steel and intensifies the growth of fatigue cracks, especially in the middle-amplitude region of low-frequency loading. The joint action of plastic predeformation and hydrogenation results in a maximal decrease in the static and cyclic crack resistance of the steel under investigation. We also analyze possible consequences of such an effect from the viewpoint of the structural strength of a drill string. Ivano-Frankivs'k State Technical University of Oil and Gas, Ivano-Frankivs'k; Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, L'viv. Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 35, No. 5, pp. 67–70, September–October, 1999.  相似文献   

19.
高压静电分选技术在回收废旧电路板中的研究进展   总被引:2,自引:0,他引:2  
余璐璐  许振明 《材料导报》2011,25(11):139-145
高压静电分选是利用物质的导电特性、介电常数差异,使静电力、重力、离心力等有效地作用在所有粒子上而实现分选,具有高效、低耗、环境友好等显著优点,是废旧电路板无害化处理和资源化利用的先进技术之一。分析了高压静电分选机的工作原理,结合对电场及空间电荷分布的研究和颗粒荷电及动力学过程研究的新进展,总结了应用于废旧电路板回收的高压电选机设备及工艺流程,并提出了该技术在废旧电路板回收再利用方面的一些新动向。  相似文献   

20.
采用弹塑性损伤本构模型,该模型结合了非线性各向同性和随动强化准则以及基于塑性位移的损伤演化规律,利用ABAQUS对一个9层钢结构在EL-Centro地震波作用下塑性变形和损伤区域的发展过程进行了数值模拟.结果表明,上部楼层的梁端产生较明显的塑性变形并形成损伤部位.这与在Northridge地震中观测到的高层钢结构的地震...  相似文献   

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