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《高等学校化学学报》2014,(9):2018
第九届SAMPE中国年会大型学术会议将于2014年10月27~29日在北京中国国际展览中心(老馆)举行。会议主题:整体化,自动化,规模生产,低成本……先进复合材料工业化之路(续)。会议将邀请来自4个国家的6位权威专家作大会报告,设先进复合材料在船舶/海洋工程中的应用、复合材料性能表征与检测技术、高性能树脂系统、纺织结构复合材料、聚合物纳米复合材料、高性能复合材料回收技术、热塑性复合材料及其加工技术、先进复合材料重点实验室材料与工艺技术创新、日本复合材料 相似文献
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文章介绍了有关隐身技术的基础知识,以及导电高分子材料在隐身技术中的应用.根据导电机理的不同,导电高分子隐身材料可分为结构型和复合型,两者在实际应用过程中各有优缺点,文章分别对其作了简单的介绍和讨论.并且针对近几年来复合材料领域的研究热点--碳纳米管纳米复合材料在隐身技术中的应用作了详细介绍. 相似文献
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石墨烯及其复合材料在水处理中的应用 总被引:2,自引:0,他引:2
石墨烯(graphene,GE)是一种由sp2杂化的碳原子以六边形排列形成的周期性蜂窝状二维碳质新材料,具有比表面积大、电子迁移率高和化学稳定性强等特性。本文重点总结了近年来石墨烯及其复合材料应用于水处理吸附剂及光催化剂两个方面的研究进展。石墨烯及其复合材料对于处理重金属、有机污染物等污染物质的吸附效果好,吸附容量高;与光催化材料结合后,石墨烯由于其独特的物理化学特性有效增强了复合材料的光催化特性。最后对各种石墨烯及其复合材料在水处理中的应用作出了评价,同时对它们在水处理中的应用前景做了展望。 相似文献
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MXene作为一种新型的二维层状结构材料而备受关注, MXene具有高电子传导率、较大的比面积、较好的机械性能以及独特的层状结构, 已广泛应用于储能、催化、吸附等领域。近年来, MXene及其复合材料应用于二次电池领域引起了人们的广泛关注。氧化物、硫化物等材料具有高容量, 但存在电导率低、反应过程中体积膨胀、循环稳定性差等问题, 构建与MXene的复合材料既能提高容量又可以增强材料的电子导电率, 有效缓解反应过程中体积膨胀, 实现最佳的电化学性能。本文主要对MXene及其复合材料在钠离子电池和钾离子电池中的最新研究进展进行总结, 简要介绍了钠离子电池、钾离子电池和MXene的研究背景, 重点介绍了MXene复合材料在钠离子电池中的应用研究, 主要按照硫化物、氧化物、碳材料进行分类, 对其合成方法与电化学性能进行综述, 同时总结了MXene复合材料在钾离子电池中的研究进展。最后本文对MXene及其复合材料的发展及其应用前景进行了总结与展望。 相似文献
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稀土元素表面处理玻璃纤维增强PTFE复合材料的拉伸性能 总被引:8,自引:2,他引:8
研究了用稀土元素(RE)处理玻璃纤维表面的最佳用量及其对玻璃纤维增强聚四氟乙烯(GF/PTFE)复合材料拉伸性能的影响。测试了不同表面处理条件下GF/PTFE复合材料的拉伸性能,并对断口形貌进行了SEM分析。结果表明,由于RE对亲和性的作用,RE能够有效地提高玻璃纤维与PTFE之间的界面结合力。当稀土元素在表面改性剂中的含量为0.2%-0.4%时,GF/PTFE复合材料的拉伸性能得到明显提高,并且在RE含量为0.3%时其性能最佳。 相似文献
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X射线光电子能谱技术在高分子材料摩擦化学研究中的应用 总被引:1,自引:0,他引:1
X射线光电子能谱技术(XPS)是材料表面分析的重要手段,其近年的快速发展促进了表面化学领域研究的深入.高分子及其复合材料在摩擦学性能方面具有普遍的优势,通过XPS对高分子及其复合材料摩擦表面的分析,可以确定摩擦过程的化学变化,并对改进材料的摩擦学性能起到理论的指导作用.作者主要介绍XPS技术的基本原理,及其在高分子与复合材料摩擦学性能研究中的应用. 相似文献
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Uroš Grošelj Mojca Žorž Amalija Golobič Branko Stanovnik Jurij Svete 《Tetrahedron》2013,69(52):11092-11108
A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives. 相似文献
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The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp3)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp2)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp2)?H and aliphatic 1,5- and 1,6-C(sp3)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp3)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp2)?H insertion. 相似文献
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N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%). 相似文献
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Shashikant U. Dighe Surya K. Samanta Shivalinga Kolle Sanjay Batra 《Tetrahedron》2017,73(17):2455-2467
An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y1 and Y2. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones. 相似文献
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In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates. 相似文献
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Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described. 相似文献
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用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在. 相似文献
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Jona Mirnik Eva Pušavec Kirar Sebastijan Ričko Uroš Grošelj Amalija Golobič Franc Požgan Bogdan Štefane Jurij Svete 《Tetrahedron》2017,73(24):3329-3337
A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu0 as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than CuI in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT). 相似文献
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George E. Magoulas Thomas Garnelis Constantinos M. Athanassopoulos Dionissios Papaioannou George Mattheolabakis Konstantinos Avgoustakis Dimitra Hadjipavlou-Litina 《Tetrahedron》2012,68(35):7041-7049
(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C60, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine. 相似文献