共查询到19条相似文献,搜索用时 140 毫秒
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分子印迹技术(MIT)是一种制备对目标分子具有预定选择性的聚合材料的技术。其制备过程包括3个步骤:一是使目标分子(即印迹分子,模板分子)与特定功能单体通过共价或非共价作用形成复合物。二是在复合物中加入交联剂,使其在复合物周围与功能单体发生聚合,得到高度交联的聚合材料。三是用物理或化学方法将模板分子从聚合物中取出,该聚合物(即分子印迹聚合物,简称MIP)中便产生与模板分子的形状、大小和官能团的固定排列匹配的印迹孔穴,对模板分子具有”记忆”能力。 相似文献
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《化学推进剂与高分子材料》2017,(3):15-18
从分子印迹技术的基本原理,分子印迹聚合物制备过程中所用到的技术条件等方面,较系统地综述了分子印迹技术的基础。介绍了几种新型分子印迹材料的合成及传感器中分子印迹技术等的研究进展和该技术在手性识别检测以及表面分子印迹技术方面的应用。 相似文献
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分子印迹技术作为一种新型的亲和分离技术,是当前发展高选择性材料的主要技术之一。利用该技术所制备的分子印迹聚合物具有分子特异识别功能。本文主要介绍分子印迹技术的方法、基本原理、分子印迹聚合物的制备方法及其在食品分析、环境分析和药物分析中的应用,并对以后的发展方向提出了展望。 相似文献
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分子印迹聚合物是分子印迹技术与聚合物膜技术相结合而发展起来的一种新型聚合物材料,不管是应用方面,还是合成上都取得了很大进展。本文主要介绍了分子印迹聚合物在分析检测、分离萃取等方面的应用,并着重综述了射线辐射法、光辐射法及微波辐射法制备分子印迹聚合物的研究进展。 相似文献
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磁性分子印迹聚合物是在磁性微粒表面利用分子印迹技术合成具有超顺磁性、高选择性、高吸附性和特异性识别的聚合物。能在外加磁场作用下实现快速分离和定向移动,是一种新型高分子材料。本文主要介绍了物理法、化学法和模板法3种磁性微粒的制备方法,以及利用分子印迹技术制备磁性分子印迹聚合物,并探讨了悬浮聚合、乳液聚合和沉淀聚合3种聚合方法的研究进展,总结了磁性分子印迹聚合物在农药残留、兽药残留、重金属残留和生物医学方面的应用。分析表明磁性分子印迹聚合物在生物医学领域,尤其是抗菌治疗方面有良好的发展前景。 相似文献
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Molecularly imprinted polymers: present and future prospective 总被引:2,自引:0,他引:2
Vasapollo G Sole RD Mergola L Lazzoi MR Scardino A Scorrano S Mele G 《International journal of molecular sciences》2011,12(9):5908-5945
Molecular Imprinting Technology (MIT) is a technique to design artificial receptors with a predetermined selectivity and specificity for a given analyte, which can be used as ideal materials in various application fields. Molecularly Imprinted Polymers (MIPs), the polymeric matrices obtained using the imprinting technology, are robust molecular recognition elements able to mimic natural recognition entities, such as antibodies and biological receptors, useful to separate and analyze complicated samples such as biological fluids and environmental samples. The scope of this review is to provide a general overview on MIPs field discussing first general aspects in MIP preparation and then dealing with various application aspects. This review aims to outline the molecularly imprinted process and present a summary of principal application fields of molecularly imprinted polymers, focusing on chemical sensing, separation science, drug delivery and catalysis. Some significant aspects about preparation and application of the molecular imprinting polymers with examples taken from the recent literature will be discussed. Theoretical and experimental parameters for MIPs design in terms of the interaction between template and polymer functionalities will be considered and synthesis methods for the improvement of MIP recognition properties will also be presented. 相似文献
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《Ceramics International》2021,47(18):25574-25579
Vanadium dioxide (VO2) is known as a typical 3d-orbital transition metal oxide exhibiting the metal-to-insulator-transition (MIT) property near room temperature. However, their electronic applications have been challenged by the quality and uniformity of VO2 thin films. In this work, we demonstrate the high sensitivity in the valence charge of vanadium and the MIT properties of the VO2 thin films to the deposition temperature. This observation indicates the necessity to eliminate the inhomogeneity in the temperature distribution of substrate during the vacuum-deposition process of VO2. In addition, a high thermoelectric power factor (PF, e.g., exceeding 1 μWcm−1K−2) was achieved in the metallic phase of the VO2 thin films and this value is comparable to typical organic or oxide thermoelectric materials. We believe this high PF enriches the potential functionality in thermoelectric energy conversions beyond the existing electronic applications of the current vacuum-grown VO2 thin films. 相似文献
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分子印迹技术在固相萃取中的应用与展望 总被引:12,自引:0,他引:12
20世纪90年代以来,具有构效预定性、特异识别性和广泛实用性等特点的分子印迹技术在异构体及手性分离、化学仿生传感器、模拟酶催化、膜分离及固相萃取等领域的研究较多. 固相萃取技术作为一种比液液萃取更好、更快速、更简便的分离技术,是近30年来才快速发展起来的.以印迹聚合物作为固相萃取填料是分子印迹技术最具应用前景的一个方向.对分子印迹技术及固相萃取技术的基本原理及方法进行了简单介绍,并着重介绍了近年来分子印迹技术在固相萃取中的应用,如环境样品分析、药物分离与分析、生物与临床医学检测等,并对两种技术结合取得的成果、面临的问题及应用前景进行了展望. 相似文献
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分子印迹技术(MIT)是一种新的、很有发展潜力的分离技术。分子印迹聚合物因其具有预定性、识别性和实用性的优点,已广泛应用于分离技术中,显示出良好的应用前景,引起了人们的广泛关注。介绍了分子印迹技术的产生、原理及其在分离技术方面的应用,并对其进行了展望。 相似文献
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分子印迹固相萃取技术在食品安全检测中的应用进展 总被引:1,自引:0,他引:1
分子印迹固相萃取技术(MISPE)是一种高效的样品前处理技术,能从复杂的样品中选择性分离目标物及其结构类似物。分子印迹技术(MIT)在食品中农药和兽药残留检测中的应用得到快速发展。综述了近两年国内外分子印迹固相萃取技术在食品安全检测中农药、兽药残留检测的应用及进展,讨论了当前分子印迹固相萃取技术在食品安全检测应用中存在的问题,并对其发展趋势进行了展望。 相似文献
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Pore pressure development in hybrid fibre-reinforced high strength concrete at elevated temperatures
The present experimental work investigates the build-up of pore pressure at different depths of High Strength Concrete (HSC) and Hybrid-Fibre-Reinforced High Strength Concrete (HFRHSC) when exposed to different heating rates. First, the effect of the measurement technique on maximum pore pressures measured was evaluated. The pressure measurement technique which utilised a sintered metal and silicon oil was found to be the most effective technique for pore pressure measurement. Pore pressure measurements carried out showed that addition of polypropylene fibres is very effective in mitigation of spalling and build-up of pore pressure inside heated HSC. Addition of steel fibres plays some role in pore pressure reduction at relatively higher pressures in deeper regions of concrete during fast heating. Pore pressure development is highly influenced by the rate of heating with fast heating leading to higher pore pressures in the deeper regions of concrete compared to slow heating. 相似文献