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非卤阻燃剂研究的最新进展 总被引:1,自引:0,他引:1
本文综述了国外磷化合物及膨胀体系,铝化合物,镁化合物,硼化合物,钼化合物及协同剂等非卤阻燃剂研究的最新成果,并简要介绍它们在各类材料中的应用。 相似文献
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铝阳极氧化膜的剥离与剥离膜的性质 总被引:6,自引:0,他引:6
1前言膜科学与技术是一门发展较快的应用科学与技术。膜可以分为有机膜和无机膜,而研究与应用较多的是有机膜,无机膜却较少。铝阳极氧化膜是无机膜,它易获得。近年来开始引起了人们的关注,如研究将它直接用作分离膜、超微网、电发光元件、传感器(气体、湿度等)等。此外,通过剥离下的铝阳极氧化膜可深入研究铝上电镀,铝阳极氧化膜、着色、封闭和磷化等表面处理技术以及铝的孔蚀行为。因此,铝阳极氧化剥离膜还是一种研究铝金属腐蚀与防护机理的手段。为此,本文将介绍这种膜的剥离方法与剥离膜的一些性质。2铝阳极氧化膜的剥离方法铝… 相似文献
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松香中铝的分析方法的研究 总被引:2,自引:0,他引:2
研究了在乙醇有机相中,用分光光度法直接测定松香中的铝。结果表明,在PH5左右的乙酸-乙酸铵缓冲溶液中,铝试剂与松香中的铝在乙醇溶液中形成红色络合物,在525nm波长处有最大吸收,表观摩尔吸光系数ε=1.35*10^4,铝浓度在0-50μg/范围内符合比尔定律。 相似文献
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有机熔盐电镀铝的研究进展 总被引:1,自引:0,他引:1
在有机熔盐电镀铝体系的构成、物理和电化学性质的基础上,对卤化烷基吡啶类、卤化烷基咪唑啉类、氯化烷芳基铵盐类电镀铝及铝合金的研究现状进行了阐述,并对这3种有机熔盐电镀铝体系的优缺点进行了归纳总结。最后,指出了有机熔盐电镀铝体系的应用前景和发展方向。 相似文献
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铝化合物催化聚酯缩聚研究 总被引:1,自引:0,他引:1
以5种铝化合物为催化剂,采用DMT路线合成聚酯,对聚合产物进行特性粘数、色值和DSC测试,结果表明: 铝化合物的催化活性略低于Sb2O3,聚酯b值也有所增加。选择溶解性好的铝化合物和减少催化剂用量对增加活性和改善 聚酯色相有利。 相似文献
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本文描述了有机及有机化妆品的概念;有机食品、绿色食品及无公害食品的差别;有机化妆品认证过程,不同国家对有机化妆品的标准、法律法规等 相似文献
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有机肥料在农作物生长过程中起着非常重要的作用。通过合理施加有机肥料,可以有效提升土壤肥力,提高农作物的产量和品质。土壤中有机质的含量是判断土壤肥力的重要依据。所以,在农业种植中要特别重视测定有机肥料中有机质的含量。作为检测有机质的一线人员,在检测过程中发现采用不同的标准、方法都会对检测结果产生影响。主要分析了有机肥料中有机质的检测方法以及应该注意的事项。 相似文献
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有机镍化合物作为重要的催化剂,在有机合发反应中有着广泛的应用.近年来有机镍化学发展十分迅速.本文全面综述了有机镍化合物在有机合成中的应用. 相似文献
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This study shows how aerosol organic oxygen data could provide new information about organic aerosol mass, aqueous solubility of organic aerosols, formation of secondary organic aerosol (SOA) and the relative contributions of anthropogenic and biogenic sources. For more than two decades, atmospheric aerosol organic mass (OM) concentration has been estimated by multiplying the measured carbon content by an assumed (OM)-to-organic carbon (OC) factor, usually 1.4. However, this factor can vary from 1.0 to 2.5 depending on location. This large uncertainty about aerosol organic mass limits our understanding of the influence of organic aerosol on climate, visibility and health. New examination of organic aerosol speciation data shows that the oxygen content is responsible for the observed range in the OM-to-OC factor. When organic oxygen content is excluded, the ratio of non-oxygen organic mass to carbon mass varies very little across different environments (1.12 to 1.14). The non-oxygen-OM-to-OC factor for all studied sites (urban and non-urban) averaged 1.13. The uncertainty becomes an order of magnitude smaller than the uncertainty in the best current estimates of organic mass to organic carbon ratios (1.6 ± 0.2 for urban and 2.1 ± 0.2 for non-urban areas). This analysis suggests that, when aerosol organic oxygen data become available, organic aerosol mass can be quite accurately estimated using just OC and organic oxygen (OO) without the need to know whether the aerosol is fresh or aged. In addition, aerosol organic oxygen data will aid prediction of water solubility since compounds with OO-to-OC higher than 0.4 have water solubilities higher than 1 g per 100 g water. 相似文献
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《Journal of Industrial and Engineering Chemistry》2014,20(4):1198-1208
In recent years, organic electronic devices which use organic materials as an active layer have gained considerable interest as light-emitting devices, energy converting devices and switching devices in many applications. In these organic electronic devices, the organic materials play a key role of managing the device performances and various organic materials have been developed to improve the device performances of organic electronic devices. In this paper, recent developments of organic electronic materials for organic light-emitting diodes and organic solar cells were reviewed. 相似文献
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As a new technology for flat-panel displays and general lighting sources, solution-processed phosphorescent organic light-emitting diodes (PhOLEDs) unfurl a bright future, due to their merits of high quantum efficiency and easy fabrication. In recent years, great progress has been made in the device performance of solution-processed PhOLEDs, by developing both high-efficiency organometallic phosphors and novel solution-processable organic host materials. This review highlights recently developed organic host materials for triplet guest emitters in solution-processed PhOLEDs. The solution-processable host materials are classified into three types – small molecule, dendrimer, and polymer – according to their molecular architecture and molecular weight. The material design concept and the relationships between the molecular structure, material properties and device performance are the focus of this discussion. A future strategy for the development of high-performance solution-processed host materials is proposed. 相似文献
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绿色有机合成是有机合成重要的前沿领域之一。在研究生的有机合成课程中介绍绿色有机合成的有关知识,对于学生了解当前有机合成的发展趋势具有重要意义。本文概述了绿色有机合成的教学内容和方式,并根据课程的特点就如何提高教学质量进行了探讨。 相似文献
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针对大学生在化学领域创新潜质发挥中存在的问题,结合实际,从化学实验教学平台的构建、管理、教学方法等方面入手,通过改变传统的循规蹈矩式有机实验模式,注入新的教学理念—有机合成,打破传统的"照单抓药"填鸭式的有机实验教学,达到培养学生创新能力的目的。 相似文献