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1.
姚田  姚舜  宋航 《化工进展》2016,35(Z2):214-218
磁性离子液体是功能化离子液体,有很广阔的应用前景。目前磁性离子液体的研究很热门,但是很多内容并不完善,需要研究者更加努力地探索出具有强大功能的化合物。作者研究室最近报道的新型磁性离子液体双水相体系具有很强的优势,其在分离、分析领域具有很广的应用潜力。  相似文献   

2.
磁性液体的应用   总被引:4,自引:0,他引:4  
牛晓坤  钟伟 《化学工程师》2004,18(12):45-47
磁性液体是一种特殊的新型纳米功能材料,是由磁性纳米微粒(一般要求小于10m)均匀弥散于某种液体基液中所构成的稳定的胶体体系。磁性纳米微粒和基液浑成一体,因此,具有将磁性和流动性两者合而为一的特性,从而衍生出一系列新颖奇异的性质。本文简要介绍了磁性液体应用领域的最新进展。  相似文献   

3.
肿瘤治疗用磁流体研究进展   总被引:2,自引:0,他引:2  
磁流体因其所具有的独特性质(流动性,磁响应性,靶向性)而应用广泛,与现代医药学相结合则更加显示出其优越性。综述了其在肿瘤治疗领域的应用研究进展。  相似文献   

4.
综合评述磁性液体的制备及其应用  相似文献   

5.
磁性液体是由纳米级的强磁性粒子高度分散于基液之中所形成的稳定的胶体体系。介绍了磁性液体的性质及其在机械和化工行业中在动态密封方面的应用  相似文献   

6.
本文阐述了磁性液体的特性,介绍采用化学共沉淀法制备纳米级(10 nm)Fe3O4微粒的技术,并采用表面活性剂和自制的ZDW基液制备了新型憎油基磁性液体,探讨了该磁性液体在动态密封、选矿分离、扬声器以及作为磁记录材料等方面的应用,并分析了目前国内外磁性液体技术的研究水平以及该技术在国内外的发展概况.  相似文献   

7.
磁性液体的研究现状   总被引:1,自引:0,他引:1  
综述了磁性液体的研究现状,并对其种类、特性、应用范围以及制备和表征方法作了较为详细地介绍。  相似文献   

8.
本文对国内外磁性液体磁粘效应的实验成果和理论成果进行了深入分析,指出研究中存在的不足,基于此测量了两种磁性液体在不同温度下粘度的变化,尤其是测得了低温条件下温度对磁性液体的影响,为磁性液体更广泛的应用提供了指南.  相似文献   

9.
21世纪是新材料、信息科学、生物技术、光电技术研究发展将有重大突破的时代。新材料包括的内容很多,其中纳米磁性液体新材料占有十分重要的位置。纳米磁性液体是一种用途广泛的新材料,研制涉及到物理、化学、材料等技术领域,应用涉及到航空、航天、生物医药、电子信息、新材料  相似文献   

10.
介绍了磁性纳米催化剂的特性,综述了近年来磁性纳米催化剂在在氢化催化、加氢甲酰化催化、C-C键偶联反应催化、氧化和环氧化催化、酯化反应催化、缩合反应催化、烯烃复分解催化、光催化、生物催化等领域应用的研究进展,旨在探讨磁性纳米催化剂制备方法和应用领域,同时提出其应用过程中存在的问题,并对发展前景进行了展望。  相似文献   

11.
Feraheme, is a recently FDA-cleared superparamagnetic iron oxide nanoparticle (SPION)-based MRI contrast agent that is also employed in the treatment of iron deficiency anemia. Feraheme nanoparticles have a hydrodynamic diameter of 30 nm and consist of iron oxide crystallites complexed with a low molecular weight, semi-synthetic carbohydrate. These features are attractive for other potential biomedical applications such as magnetic fluid hyperthermia (MFH), since the carboxylated polymer coating affords functionalization of the particle surface and the size allows for accumulation in highly vascularized tumors via the enhanced permeability and retention effect. This work presents morphological and magnetic characterization of Feraheme by transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), and superconducting quantum interference device (SQUID) magnetometry. Additionally, the results of an initial evaluation of the suitability of Feraheme for MFH applications are described, and the data indicate the particles possess promising properties for this application.  相似文献   

12.
作为一类在航空、机械、电子、汽车、生物医疗等领域均有着广泛应用前景的新型材料——磁性流体近年来受到了国内外的广泛重视,成为磁性材料研究领域内的热点课题之一,并且逐步发展成为一类新兴产业。综述了磁性流体及其关键材料的产业化发展历程、现状以及未来的发展趋势,着重介绍了磁性流体及其关键材料磁性纳米粒子的产业发展情况,对磁性流体产业的未来发展前景进行了展望。  相似文献   

13.
温热疗法治癌材料现状   总被引:12,自引:0,他引:12  
癌症是人类面临的一大医学难题,作为一种有效的治癌新方法--温热疗法正成为国际研究的热点.本文介绍了温热疗法的原理及近年来研究较多的一些温热治癌材料,其中包括:磁性微晶玻璃、低居里点铁氧体、合金热籽和磁流体,并对温热疗法治癌材料的研究发展予以展望.  相似文献   

14.
    
In this work, hollow magnetic silica microspheres (HMS) were synthesized by the template method, polyethylene glycol (PEG) and poly(lactic acid) (PLA)‐grafted hollow magnetic microspheres HMS@PLA–PEG were successfully prepared through ring‐opening polymerization method. Ioversol was loaded into HMS@PLA–PEG by physical coating, and the drug loading content was up to 39.4%. It also exhibited a slower and steady release than HMS and the cumulative release was up to 55.1% at physiological pH, which implied the PLA–PEG could prolong the circulation time. Meanwhile, to improve the efficiency of contrast, we have developed composite microspheres encapsulating superparamagnetic iron oxide (Fe3O4) as magnetic target for increasing the local concentration of the contrast media and expecting to put magnetic resonance imaging (MRI) and computed tomography (CT) technology together to apply in medical applications. Furthermore, the cytotoxicity assay in vitro was also investigated. The results revealed the ioversol‐loaded HMS@PLA–PEG exhibited low toxicity at a higher concentration, even it is up to 400 μg/mL. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44914.  相似文献   

15.
用油酸钠作为表面活性剂,采用化学共沉淀法制备纳米级油酸改性铁氧体磁性粒子,从温度T、碱的过量比y、表面活性剂的用量比n、反应时间t4个方面进行研究。确定高纯度、小粒径、强磁性、均匀分散的Fe3O4磁性粒子的合理工艺条件:t=180 min,T=80℃,y=0.25,n=0.6。红外光谱测试,证明产品为表面活性剂油酸包裹的纳米级磁性粒子,粒径<10 nm,XRD分析证实了产品为铁氧体磁性粒子,古埃磁天平对产品进行了性能测试。  相似文献   

16.
    
Magnetic nanospheres have numerous applications in biomedicine, biotechnology and wastewater treatment, due to their high surface area, tunable sphere size and superparamagnetic properties. Magnetic nanoparticles can be designed and endowed with optical, electronic and fluorescent properties, allowing a wide range of functionality. Multifunctional magnetic particles with heterodimer structures allow various kinds of target molecules to be attached onto their specific parts via affinity or coordinate bonding, etc. The abilities of these nanodevices, including the encapsulation of target molecules in magnetic hybrid nanostructures and easy magnetic separation in the presence of external magnetic fields, show much promise for magnetic imaging, magnetic separation and drug delivery. Consequently, magnetic particles offer excellent potential future uses in disease diagnosis, hyperthermia, immunoassays, electrochemical biosensors, contaminated water treatment and optical detection. In this article, we review the preparation and application of inorganic and organic magnetic composite spheres in the fields of magnetic separation, drug delivery, hyperthermia, magnetic resonance imaging, and others. The size, specific surface area, structure, magnetic properties and surface functional groups of nanospheres have a great influence on their effectiveness in these applications. The encapsulation of target molecules in magnetic hybrid nanostructures and their easy separation using an external magnetic field show promise for the fabrication of novel nanodevices for many applications. Copyright © 2011 Society of Chemical Industry  相似文献   

17.
    
In this work, a facile solvothermal synthesis of MnFe2O4 nanoparticles is followed by an easy and reproducible process to envelop the synthesized MnFe2O4 nanoparticles with iron oxide nanoparticles using ethanol and ethylene glycol as solvents. All prepared MnFe2O4 nanoparticles show a homogenous distribution of spherical particles with an average particle size between 12 and 16 nm. The encapsulation process of MnFe2O4 nanoparticles does not affect their homogenous distribution with a very thin layer of Fe3O4 on the shell structure. The magnetic properties showed a superparamagnetic character with enhanced magnetic properties of MnFe2O4@Fe3O4 compared to pure MnFe2O4, which has been verified by magnetization and electron spin resonance. The heating efficiency of the prepared samples was evaluated in terms of the specific loss power using the calorimetric method. The synthesized MnFe2O4 nanoparticles show a significantly high value of about 72 W/g, which got doubled in the core@shell structure and reached 140 W/g at 189 kHz and 10kA/m of the magnetic field.  相似文献   

18.
马啸华  马淮凌  魏敏 《应用化工》2006,35(6):425-427
研究稀土铁氧体表面改性,采用化学共沉淀法制备了稀土铁氧体磁流体,并用古埃磁天平、透射电子显微镜、X射线衍射仪等对其进行了性能测试。同时探讨了稀土铁氧体磁性粒子的形成机理及表面活性剂对磁流体基本性质的影响;然后,系统地研究了当温度80℃,时间180 m in,表面活性剂用量比0.25,碱过量比0.6时稀土材料Dy3+的加入对铁氧体磁流体性能的影响,并对其进行了理论分析和探讨。  相似文献   

19.
磁性靶向制剂具有制备工艺简单,可提高药效,降低毒副反应,定向给药,提高生物利用度及药物稳定性等优点,目前国内外此类制剂成为研究热点。通过查阅文献资料,进行系统的分析、归纳,对磁性靶向制剂的组成、特点进行探讨,主要从目前磁性靶向制剂研究的三个方向:磁性微球、纳米微粒、磁性脂质体入手,对磁性靶向制剂的研究进展进行综述。  相似文献   

20.
采用化学共沉淀方法制备Fe_3O_4磁性粒子,并使用油酸和十一烯酸对其进行表面改性,然后采用一步细乳液聚合法制备含有羧基官能团的Fe_3O_4/P(St/ACPA)磁性高分子纳米球,对磁流体和磁性高分子纳米球进行性能表征。结果表明,改性的Fe_3O_4磁流体分散性好,粒径均一,在室温下呈超顺磁性,磁含量为68.5%(w),饱和磁化强度为51.3emu/g;Fe_3O_4/P(St/ACPA)磁性高分子纳米球成球性好,粒径为70 nm,磁含量为39%(w),饱和磁化强度为27.9 emu/g。  相似文献   

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