共查询到20条相似文献，搜索用时 15 毫秒
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溶胶-凝胶法制备有机/无机杂化材料研究进展 总被引：10，自引：0，他引：10
综述了溶胶-凝胶法制备有机／无机杂化材料的途径和产物的结构特征,并对有机／无机杂化材料进行了分类;阐述了溶胶-凝胶法制备有机／无机杂化材料的基本原理和步骤。 相似文献
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以无定形二氧化硅为起始原料,与乙二醇、氢氧化钾反应,生成高反应活性的五配位硅钾化合物,再与2-氯乙醇反应生成双羟基四配位硅化合物(DHTS)。并以DHTS为前驱体与甲基丙烯酸甲酯(MMA)、γ-(甲基丙烯酰氧基)丙基三甲氧基硅烷(KH-570)反应,用BPO引发聚合,在酸催化下通过溶胶-凝胶法制备了PMMA/四配位硅杂化材料。并用IR光谱表征了杂化材料的结构;同时研究了其硬度、透光率、热稳定性等问题。 相似文献
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Felix Dollinger Kyung‐Geun Lim Yang Li Erjuan Guo Peter Formnek Ren Hübner Axel Fischer Hans Kleemann Karl Leo 《Advanced materials (Deerfield Beach, Fla.)》2019,31(19)
The organic permeable base transistor (OPBT) is currently the fastest organic transistor with a transition frequency of 40 MHz. It relies on a thin aluminum base electrode to control the transistor current. This electrode is surrounded by a native oxide layer for passivation, currently created by oxidation in air. However, this process is not reliable and leads to large performance variations between samples, slow production, and relatively high leakage currents. Here, for the first time it is demonstrated that electrochemical anodization can be conveniently employed for the fabrication of high‐performance OPBTs with vastly reduced leakage currents and more controlled process parameters. Very large transmission factors of 99.9996% are achieved, while excellent on/off ratios of 5 × 105 and high on‐currents greater than 300 mA cm?2 show that the C60 semiconductor layer can withstand the electrochemical anodization. These results make anodization an intriguing option for innovative organic transistor design. 相似文献
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多面体齐聚倍半硅氧烷(POSS)具有特殊的笼状结构,可从纳米尺度上起到对聚合物的改性作用。通过不同的方法将POSS分子引入到聚合物体系中去,以改善聚合物性能是聚合物改性的重要手段之一。文中从聚合方式上对含POSS聚合物的制备进行介绍,包括传统自由基聚合、活性聚合、缩聚聚合和开环聚合,并对合成的含POSS有机/无机聚合物的性能进行相关介绍。 相似文献
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ZnO纳米材料杂化硅丙乳液的合成与性能研究 总被引：5，自引：0，他引：5
研究了合成机械稳定性合格的ZnO纳米材料杂化硅丙液的前提条件和合成方法;制备了各种稳定性合格的具有核—壳型结构的ZnO纳米材料杂化硅丙乳液;利用该纳米杂化乳液制备了耐人工老化达到1700小时的外墙乳胶涂料。 相似文献
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以正硅酸乙酯（TEOS）为水解前驱体制得二氧化硅（SiO2）,并通过硅烷偶联剂（KH570）表面改性后,与全氟烷基乙基丙烯酸酯（FM））等乙烯基单体聚合,通过无皂乳液聚合方法制备了氟硅改性丙烯酸酯有机/无机杂化无皂乳液。FT-IR分析表明,TEOS水解为SiO2,并与丙烯酸酯单体、氟单体参与了共聚反应;采用TEM及AFM对乳胶粒的形态结构进行表征,发现乳胶粒分布较为均一,平均粗糙度和致密程度较高;DLS分析表明乳液平均粒径为49.49nm;接触角测试表明氟单体、硅溶胶及KH570的加入显著提高了涂膜的防水性。 相似文献
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Alexander Scholz Daniel Gerig Lukas Zimmermann Mervin Seiberlich Noah Strobel Gerardo Hernandez-Sosa Jasmin Aghassi-Hagmann 《Advanced Materials Technologies》2021,6(2):2000172
Hybrid systems, unifying printed electronics with silicon-based technology, can be seen as a driving force for future sensor development. Especially interesting are sensing elements based on printed devices in combination with silicon-based high-performance electronics for data acquisition and communication. In this work, a hybrid system integrating a solution-processed organic photodiode in a silicon-based system environment, which enables flexible device measurement and application-driven development, is presented. For performance evaluation of the integrated organic photodiode, the measurements are compared to a silicon-based counterpart. Therefore, the steady state response of the hybrid system is presented. Promising application scenarios are described, where a solution-processed organic photodiode is fully integrated in a silicon system. 相似文献
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Hans Kleemann Alrun A. Günther Karl Leo Björn Lüssem 《Small (Weinheim an der Bergstrasse, Germany)》2013,9(21):3670-3677
Vertical organic thin‐film transistors (VOTFTs) are promising devices to overcome the transconductance and cut‐off frequency restrictions of horizontal organic thin‐film transistors. The basic physical mechanisms of VOTFT operation, however, are not well understood and VOTFTs often require complex patterning techniques using self‐assembly processes which impedes a future large‐area production. In this contribution, high‐performance vertical organic transistors comprising pentacene for p‐type operation and C60 for n‐type operation are presented. The static current–voltage behavior as well as the fundamental scaling laws of such transistors are studied, disclosing a remarkable transistor operation with a behavior limited by injection of charge carriers. The transistors are manufactured by photolithography, in contrast to other VOTFT concepts using self‐assembled source electrodes. Fluorinated photoresist and solvent compounds allow for photolithographical patterning directly and strongly onto the organic materials, simplifying the fabrication protocol and making VOTFTs a prospective candidate for future high‐performance applications of organic transistors. 相似文献
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王利平 《高分子材料科学与工程》2010,(3):12-14
首先将偶氮类引发剂引到纳米二氧化硅的表面,然后以此为引发剂,以甲基丙烯酸叔丁酯基二硫代萘甲酸酯(TNPBE)为链转移剂(CTA),进行甲基丙烯酸β-羟乙酯的可逆加成-断裂链转移(RAFT)自由基聚合,制备了甲基丙烯酸β-羟乙酯/纳米二氧化硅(PHEMA/nano-SiO2)有机/无机杂化材料,并用红外光谱(FT-IR)、透射电镜(TEM)和热失重(TG)等方法对其结构和性能进行了表征与测试。研究结果表明,聚合物已经接枝到了纳米二氧化硅的表面,整个非均相体系中的聚合反应都是在链转移剂的作用下进行的,TG分析说明了此杂化材料的热稳定性良好。 相似文献
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PMTES/SiO2有机-无机杂化材料的研究 总被引：10，自引：0，他引：10
以甲基三乙氧基硅烷（ＭＴＥＳ）正硅酸乙酯（ＴＥＯＳ）为原料,采用溶胶－凝胶工艺制备出均质透明的ＰＭＴＥＳ／ＳｉＯ２杂化玻璃,并进行ＩＲ,ＤＴＡ,ＴＧ,ＳＥＭ测定,结果表明,该杂化玻璃的耐热性比有机玻璃优点,耐４００℃高温,具有疏水透气性能,可用于文物陈列和水产养殖业。 相似文献
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层状类钙钛矿结构有机-无机杂合物的结构设计思想 总被引：1，自引：0，他引：1
层状类钙钛矿结构有机-无机杂合物是由有机、无机组元在分子尺度上组装而成的一类新材料,其结构和能带具有可设计可控性,因此应用前景广阔.论述了无机类钙钛矿和类钙钛矿杂合物在结构上低维拆分与组装的设计思想. 相似文献
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Pain-perceptual Nociceptors (PPNs) in the biological sensory system are critical for the human body to perceive noxious stimuli from the outside world and start appropriate motor responses to minimize potential physical damage. Realization artificial nociceptors with unique synaptic and pain-perceptual functions of the human nervous system is a key step to develop the next-generation artificial intelligence systems. Here, an artificial pain-perceptual device based on an ionic liquid-polymer solid-state electrolyte-gated poly(3-hexylthiophene) (P3HT) transistor is reported. With the drift motion of mobile ions in the electrolyte layer and the formation of an electric double layer (EDL) at electrolyte/semiconductor interface under an applied electric field, the channel conductance can be tuned progressively to exhibit synaptic weight modulation function. On top of the artificial synaptic functions, the P3HT/electrolyte-based transistor successfully emulates the pain-perception process in a biological nociceptor, with all unique features of threshold, no adaptation, sensitization/desensitization, and relaxation. Moreover, the pain conditioning process (i.e., hyperalgesic response, and pain extinction effect) through associative learning is demonstrated using the artificial synaptic transistor, indicating its potential application in bio-inspired neural systems. 相似文献
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热固性聚酰亚胺树脂基复合材料已在航空航天领域得到了广泛的应用,然而随着航空航天技术的发展,传统有机聚酰亚胺基体树脂的耐温等级逐渐不足以达到飞行器的设计和应用需求,发展新型耐高温有机/无机杂化聚酰亚胺树脂成为国内外研究重点。本文总结了近年来国内外有机/无机杂化聚酰亚胺基体树脂的发展现状,重点从合成方法、结构设计与性能调控、固化过程和高温降解行为等方面对含笼状倍半硅氧烷聚酰亚胺、含碳硼烷聚酰亚胺和含硅氧烷聚酰亚胺的特点和耐热机制进行了介绍,并对有机/无机杂化聚酰亚胺树脂未来发展面临的挑战与机遇进行了讨论分析。 相似文献
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聚烯丙醇/TiO2有机无机杂化材料的研究 总被引：2，自引：0，他引：2
以钛酸丁酯Ti(OBu)4,烯丙醇为原料,采用溶胶0凝胶（sol-gel)工艺,制备出聚烯丙醇／TiO2有机无机杂化复合材料,研究钛酸丁酯与烯丙醇的杂化机理,并对该材料的物化性能及结构进行测试和表征,该杂化材料以TiO2为核,碳链为壳,具有增强增韧的效果。 相似文献