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本文首先对汽车排放污染物的主要成分及其危害作了简要分析,然后从七个方面来剖析汽车排放污染的控制途径,包括汽车新技术、加强对汽车排放污染物的检测、开发新能源汽车、提高燃油质量标准、提高汽车驾驶员素质、采用科学的道路交通管理和强化机动车尾气检测源头监督管理。 相似文献
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一、橡胶减振零部件与汽车NVH性能
汽车的NVH(Noise,Vibration and Harshness)特性是汽车的五大重要性能之一(另外四个性能指标为:安全、节能、环保和可靠性)。随着汽车的高速化、轻量化设计和人们对汽车舒适性要求的不断提高,汽车在NVH方面的问题越来越突出并被日益重视。橡胶减振元件是汽车减振系统中的重要减振元件.对汽车的NVH性能有重要的影响。汽车的NVH性能是通过控制汽车中有关零部件及相关子系统的振动与噪声而得以实现的.它给汽车用户的感受是最表面和直接的。汽车的NVH特性是汽车行业与相关汽车零部件行业关注的综合性问题之一。 相似文献
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水性汽车修补漆以其绿色、环保、可持续发展的特点必将引领着汽车修补漆行业的发展趋势。文章介绍了全球和中国汽车修补漆市场动态,VOC排放相关法律法规,水性汽车修补漆的发展历史、现状,以及对水性汽车修补漆未来的展望。 相似文献
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我国汽车胶粘剂开发应用的现状及前景 总被引:2,自引:0,他引:2
概述了我国汽车胶粘剂、密封胶开发应用的发展历程,重点介绍了汽车涂装用焊缝密封胶和抗石击涂料、汽车装配用挡风玻璃粘接密封胶和可预涂高强度微胶囊厌氧胶的国内开发应用现状和发展趋势,展望了“十一五”期间我国汽车工业对汽车胶粘剂的品种开发和市场需求。 相似文献
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当前,汽车在我国发展速度十分迅猛,随着我国汽车数量的不断增加,汽车也带来了一定的能源危机和环境污染。在能源和环保的当前形势下,新能源汽车是我国未来汽车发展的方向和趋势。本文对我国新能源汽车的概念、发展背景、发展现状等方面进行了探讨,并提出了促进我国新能源汽车发展的对策,旨在为行业良性发展提供参考依据。 相似文献
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众所周知,汽车的NVH(声振粗糙度)特性是汽车的五大重要性能之一,随着汽车的高速化、轻量化设计,和人们对汽车舒适性要求的不断提高,汽车在NVH方面的问题越来越突出并被日益重视,因而NVH橡胶减震元件在汽车工业 相似文献
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介绍了改性聚苯醚(mPPE)在汽车工业中的应用,包括世界对mPPE的需求量,mPPE在汽车上的具体应用,汽车用mPPE的主要品牌和性能,汽车用mPPE的制备方法,我国汽车用mPPE的状况、结论和建议。 相似文献
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生物修复技术在污染治理中的应用 总被引:12,自引:0,他引:12
随着工业的发展有毒有害物对环境的污染越来越引起人们的关注,而生物修复技术以基成本低、处理效果好、无二次污染等特点在污染治理中发挥了巨大的作用?从80年代产生以来,得到了越来越广泛的应用。本文简要介绍了生物修复技术的原理、方法、特点、及其在污染治理中的一些应用,并指出上前存在问题和今后的发展方向。 相似文献
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Refining normal and genetically enhanced soybean oils obtained by various extraction methods 总被引:3,自引:0,他引:3
Four different extraction methods, extrusion-expelling, conventional flaking-solvent extraction, expander-solvent extraction,
and screw pressing, were used to separate oil and meal of a commodity soybean. The quality and refining characteristics of
oils obtained by these methods were evaluated, and the effects of extraction method on oil quality were determined. The screw-pressed
oil was more oxidized and hydrolyzed than the oils from the other extraction methods. The extruded-expelled oil had oxidative
status similar to the solvent-extracted oils, although it contained the lowest amount of tocopherols. Five genetically enhanced
soybeans were also processed by extrusion-expelling and solvent extraction methods, and differences in refining of these oils
were examined. Overall, extruded-expelled oils were significantly different from the solvent-extracted oils in that they contained
less tocopherols and were more oxidized than the solvent-extracted oils during refining. The differences between oils from
the two extraction methods were magnified owing to the inclusion in the experiment of oils with modified compositions. The
more unsaturated oils underwent significantly more oxidative degradation during refining than did the more saturated ones. 相似文献
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In this study, Na‐montmorillonite was organically modified with cetyltrimethylammoniumbromide (CTAB) and intercalated with in‐situ polymerized indene. Polyindene(PIn)/Organo‐MMT nanocomposites were obtained with three different compositions and coded as: K1: [PIn(94.5%)/O‐MMT(5.5%)], K2: [PIn(92.8%)/O‐MMT(7.2%)], and K3: [PIn(87.9%)/O‐MMT(12.1%)]. These nanocomposites were subjected to full characterization with various techniques. Electrokinetic studies were conducted to reveal the zeta (ζ)‐potential characteristics of the nanocomposites. ζ‐potentials of the materials were observed to decrease with increasing O‐MMT content. The cationic (CTAB) and anionic (sodium dodecylsulfate) surfactants were shifted the ζ‐potentials of the colloidal dispersions to more positive and more negative regions, respectively whereas nonionic surfactant (Triton X‐100) caused almost no change. The pH and temperature were observed to shift the ζ‐potential values of the nanocomposites to more negative and slightly more positive regions, respectively. With the addition of mono (NaCl), di (BaCl2) and three (AlCl3) valent salts, the ζ‐potential of the nanocomposites were shifted to more negative, more positive, and much more positive regions, respectively. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 相似文献
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评述了国内外高相对分子质量聚苯乙烯树脂的合成技术。自由基聚合工艺研究开发比较活跃,阴离子聚舍尽管工艺过程比较复杂,但由于接近完全转化且产物相对分子质量分布较窄,所以发展前景比较广阔,无引发剂热聚合及其它聚合技术关注者甚少。 相似文献
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