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1.
导电涂料的导电机理   总被引:17,自引:0,他引:17  
讨论了结构型导电涂料和掺合型导电涂料的导电机理以及影响其导电性的主要因素。  相似文献   

2.
聚合物复合导电材料的导电机理   总被引:3,自引:0,他引:3  
本文叙述了聚合物复合导电材料的导电机理,并且在此基础上研究了加压、硬化型导电复合体和干燥型导电涂料的导电性随组分的变化规律。  相似文献   

3.
讨论了结构型导电涂料和掺合型导电涂料的导电机理以及影响其导电性的主要因素.  相似文献   

4.
本文叙述了以铜粉为导电填料的干燥型导电涂料的制备,讨论了干燥型导电涂料的主要成分——导电填料、聚合物以及溶剂的量对导电涂料导电性的影响  相似文献   

5.
聚合物复合导电材料的导电机理   总被引:1,自引:0,他引:1  
本文叙述了聚合物复合导电材料的导电机理,并且在此基础上研究了加压、硬化型导电复合作和干燥型导电涂料的导电性随组分的变化规律。  相似文献   

6.
研究了石墨-聚苯乙烯-苯、石墨-醇酸清漆-稀释剂、石墨-硝基清漆-稀释剂3种涂料中分别掺入碘后对涂料导电性能的影响,实验表明,掺碘后3种涂料的导电性分别提高到3.1倍、4.5倍、13.1倍,其增导机理有:一是生成石墨-碘传荷络合物,二是碘与聚合物反应生成了极性基团,在相同情况下,溶液型涂料导电性高于溶胶型涂料。  相似文献   

7.
采用氯醚树脂为基料,复合导电石墨及相应溶剂和助剂所制备的导电涂料,体积电阻率可达 0. 1Ω·cm,耐高温 (200-300℃)抗腐蚀。实验证明,该种涂料是一种可长期在严酷环境中使用的性能优越的导电材料。  相似文献   

8.
导电聚苯胺的合成及对电磁屏蔽涂料屏蔽效能的影响   总被引:5,自引:0,他引:5  
用盐酸作掺杂剂合成电导率达15S/cm的导电聚苯胺,讨论氧化剂的用量、盐酸的浓度、反应时间、反应温度等因素对聚苯胺(PAn)导电性的影响,并得到了最佳实验条件:氧化剂:苯胺:盐酸=1:2:4,盐酸浓度1mol/L,反应温度0℃,反应时间4h。此外,测试结果表明,在体积分数为10%Ni的导电涂料中加入5%所制的导电聚苯胺后,涂料的屏蔽效能显著提高,这是形成了更多有利于电子运动的导电网络所致。  相似文献   

9.
本文用化学聚合方法制备了新一代导电聚合物材料PEDT(3,4-聚乙烯二氧噻吩),分析了聚合物PEDT的导电机理,研究了聚合温度、聚合改良剂、单体氧化剂配比、溶剂含量、烘干温度等工艺条件对PEDT导电性能的影响。  相似文献   

10.
碳系纳米材料具有优异导电性能,可作为导电填料填充到高分子基体制备导电复合材料。对碳系纳米导电材料分类、导电机理、导电性能及应用领域进行了讨论,对近期研究进展进行简要综述。最后,展望了碳系纳米导电材料填充高分子导电复合材料未来发展趋势并探讨了目前存在的问题。  相似文献   

11.
Preparation of Polyacrylate-based Conductive Coatings and Its PTC Effect   总被引:2,自引:0,他引:2  
Polyacrylate-based conductive coatings were prepared from polyacrylate emulsion as matrix and carbon black (CB) whose surface was treated with thanate coupling agent as conducting particles. One kind of organic crystal was added to study its effects on the electrical conductivity and PTC ( positive temperature coefficient ) effect of the conductive coatings. Experimental results show that the watings containing only polyacrylate emulsion and CB exhibit an excellent electrical conductivity but bad PTC effect, and when organic crystal is added,PTC effect is characterized and can increase by 2 orders of magtitude. The critical transformation temperature of polyacrylate emulsion/CB PTC composites is decided by melting point of organic crystals.  相似文献   

12.
综合评价了导电有机聚合物的合成、掺杂,着重分析了电化学合成原理,单体、反应机理和影响因素。  相似文献   

13.
以苯胺为单体,过硫酸铵为氧化剂,通过化学氧化法合成聚苯胺,并以其为导电填料,以环氧树脂为成膜物,制备出一种电导率在0-04-0-06 S/cm范围内的新型导电防腐涂料.讨论了氧化剂的用量、盐酸的浓度、反应时间和反应温度等对聚苯胺涂料导电性的影响以及在盐雾、酸性、碱性和油水条件下,其腐蚀情况和电导率的变化.结果表明:实验最佳制备条件为:氧化剂与苯胺的摩尔比1∶1,反应温度小于5℃,反应时间4h,盐酸浓度为2 mol/L,聚苯胺的质量分数为15%~20%;除碱性条件外,导电聚苯胺防腐涂料在油水、盐雾和酸性条件下均具有良好的导电性和防腐蚀性能.  相似文献   

14.
部分导体柱的静电场   总被引:1,自引:0,他引:1  
在双极柱坐标系中,建立了部分导体柱受均匀外电场E0激励的数学模型,并给出了这一问题的扰动电场和渗透电场的解析计算公式,在特殊情况下得到了接地平面上部分导体柱,开槽柱菜壳及开缝无限大平板在均匀外电场激励下的解析计算公式,这些典型情况下的结果验证了本文公式对一般性部分导体柱受均匀外电场激励的正确描述,最后,还给出了少量的数值计算结果。  相似文献   

15.
Several polyacrylate matrixes were prepared with monomers such as methyl methacrylate, KH-570, acrylic acid and butyl acrylate, and the electrochromic behavior of their soluble PAn composite coatings was also studied by electrochemical analysis and spectrophotometry. It shows that the constitution of the polymer matrixes have great effects on the electrochromic process and the color change of the composite coatings. When the matrix consists of acrylic acid unit, PAn of both interior and exterior composite possesses the same electrochemical reactivity, shorter responding time and wider color-changing range. But it is contrary when matrixes contain no acrylic acid. Furthermore, the composite containing acrylic acid units has still electrochemical reactivity in distilled water instead of LiCIO,-PC electrolyte.  相似文献   

16.
伴随着现代企业理财环境的变迁。人们有必要重新审视公司理财目标,并以此作为制定公司经营战略的“轴心”.本通过对历史变迁中的理财目标的系统考察,着重评判了“利润最大化”作为理财目标所表现出来的种种弊端。进而提出在建立和完善现代企业制度的框架下,确立“企业价值最大化”才是公司理财目标的现实选择.  相似文献   

17.
聚苯胺导电纤维的制备   总被引:2,自引:0,他引:2  
介绍了聚苯胺的结构及导电机理,综述了近年来聚苯胺导电纤维的发展及应用前景,对现场吸附法、湿法与干湿法纺丝法、静电纺丝法等制备聚苯胺导电纤维的方法进行了较详细的介绍和探讨.  相似文献   

18.
To evaluate the property of the organic coatings in oil and gas plants, the aging process was studied in high temperature and high CO_2 partial pressure environment. Correlations were developed between the macroscopic properties and microstructure of the organic coatings. The surface appearance, mechanical properties, and permeability of the organic coatings were measured. Furthermore, the crystal structure of the organic coatings was investigated through synchrotron radiation grazing incidence X-ray diffraction(GIXRD) on the BL14B1 beam line in Shanghai Synchrotron Radiation Facility. Combined with the Fourier transform infrared spectroscopy, the molecular structure of the organic coatings was investigated. The experimental results indicate that the thickness variation and weight loss of the organic coatings increase with the immersion time, and the penetration resistance of the coating obviously decreases as the temperature rises. Moreover, the degradation of the organic coatings with immersion time in high temperature and high CO_2 partial pressure environment is caused by the amorphization of the organic coatings as the groups and bonds of the organic coatings were not damaged.  相似文献   

19.
To evaluate the property of the organic coatings in oil and gas plants, the aging process was studied in high temperature and high CO2 partial pressure environment. Correlations were developed between the macroscopic properties and microstructure of the organic coatings. The surface appearance, mechanical properties, and permeability of the organic coatings were measured. Furthermore, the crystal structure of the organic coatings was investigated through synchrotron radiation grazing incidence X-ray diffraction (GIXRD) on the BL14B1 beam line in Shanghai Synchrotron Radiation Facility. Combined with the Fourier transform infrared spectroscopy, the molecular structure of the organic coatings was investigated. The experimental results indicate that the thickness variation and weight loss of the organic coatings increase with the immersion time, and the penetration resistance of the coating obviously decreases as the temperature rises. Moreover, the degradation of the organic coatings with immersion time in high temperature and high CO2 partial pressure environment is caused by the amorphization of the organic coatings as the groups and bonds of the organic coatings were not damaged.  相似文献   

20.
知识经济对财务管理的影响有五个方面明晰理财目标;转移筹资重点;扩展投资领域;改变了收益分配基础;冲击了传统的理财组织.  相似文献   

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