共查询到20条相似文献,搜索用时 140 毫秒
1.
综述了近年来生物降解聚合物药物微球的制备方法。随着药剂学的不断发展,传统的载药体系已经不能满足其需求。因此出现了许多新型的具有不同功能特性的药物载体。生物降解聚合物微球由于其结构组成可设计,并具有良好的安全性、生物相容性和生物降解性,可用作药物控释载体、表面改性、支架材料等,在生物医学领域获得了广泛的重视和应用。 相似文献
2.
本文主要介绍了离子交换树脂在药物控释系统中的应用,以及药物树脂微球囊的制备方法,并对其发展前景进行了展望。 相似文献
3.
4.
共价有机框架(Covalent organic frameworks, COFs)是一类通过共价键连接形成的新兴多孔结晶有机聚合物,具有比表面积大、孔隙高度可调及易于化学修饰等特点,是近年来多孔材料领域的研究热点。载药量高、细胞毒性低、生物相容性良好和药物释放能力高效等特点为COFs材料在药物递送领域提供了良好的应用潜力。简要总结了近年来药物递送载体的研究进展,介绍了COFs及其复合材料的合成方法及表征,列举了COFs作为几种模型药物(如阿霉素、5-氟尿嘧啶等)的载体在药物递送中的应用,提出了COFs材料在药物递送领域中的优势,最后对目前COFs材料在药物递送领域所面临的挑战和未来发展的机遇进行了总结和展望。 相似文献
5.
6.
7.
8.
随着化工生产与材料学的高速发展,离子交换树脂这一新型材料与天然药物化学之间的学科交叉已日臻深入,离子交换技术成功的解决了部分以往仅仅依靠天然药物化学无法攻克的难题,其应用范围已贯穿药物开发,成分分析,制剂工艺等重要环节。文章主要围绕其在天然药物化学提取分离,天然药物化学分析,天然药物制剂3方面的应用与新进展进行了综述,为相关研究提供参考。 相似文献
9.
10.
11.
12.
纤维状离子交换剂的制备及应用 总被引:13,自引:1,他引:13
介绍了纤维状离子交换材料的几种常见制备方法,聚合物混纤法将成为重点研究对象,同时,探讨了其在众多领域中的应用。指出此种新型的离子交换材料有着广阔的发展前景。 相似文献
13.
Sachin S. Pathak I. C. Pius R. D. Bhanushali K. T. Pillai J. V. Dehadraya S. K. Mukerjee 《Journal of Porous Materials》2013,20(4):753-761
Internal gelation process was employed for preparation of 0.3–1 mm sized microspheres of titania for their application in ion exchange columns. The conventional internal gelation process was modified by adding surfactant and oil emulsion in the feed broth, which introduced large pores in the structure of the material. The effects of concentration of hydrochloric acid, titanium, surfactant and hexamethylenetetramine to titanium ratio in the feed broth and temperature of calcination on the surface characteristics of the final product were studied. The conditions of preparation were optimized to obtain physically stable porous microspheres suitable for various applications. The resultant material was characterized by pore size distribution, pore volume, thermogravimetry, X-ray diffraction and SEM analyses. Ion exchange behaviour of the material was then studied by pH titration. 相似文献
14.
15.
Zeid A. ALOthman Inamuddin Mu. Naushad 《Journal of Inorganic and Organometallic Polymers and Materials》2013,23(2):257-269
This article provides a review in the area of zirconium(IV) based organic–inorganic composite ion exchange materials used in analytical, pharmaceutical and environmental protection processes. It focuses on the synthesis, characterization and electroanalytical applications of various Zr(IV)-based composite ion exchangers in detail. The results obtained in different studies have also been critically reviewed. Also reviewed are the various composite cation exchange materials used as electroactive materials for the fabrication of ion-selective membrane electrodes. The ion exchange kinetic parameters of Zr(IV) based composite ion exchangers have been discussed, which provide the preliminary idea before the selection of the material for a particular application. 相似文献
16.
A new organic–inorganic cation exchanger EDTA-stannic(IV)iodate was synthesized. The materials possess good chemical and thermal
stability. The exchanger was characterized on the basis of X-ray, TGA, FTIR, UV–Visible spectrophotometery and SEM studies.
ion exchange capacity, pH titration, elution and distribution studies were also carried out to determine the primary ion exchange
properties of the material. The SEM study confirms the fibrous nature of the material. The exchanger behaves as a monofunctional
cation exchanger with ion exchange capacity of 1.30 meq/g for Na+ ions. The material can perform well upto the temperature of 500 °C and retains the 76.4% of ion exchange capacity. The material
is fairly stable in dilute solutions of some common mineral acids, bases and organic solvents. The differential selectivity
of metal ions on EDTA-stannic(IV)iodate has been utilized to perform analytically and industrially important binary separations. 相似文献
17.
离子交换树脂催化酯化研究进展 总被引:4,自引:0,他引:4
与传统的无机催化剂相比,离子交换树脂表现出良好的催化性能并且能回收再利用。本文简单介绍了离子交换树脂的种类,重点介绍了离子交换树催化剂在酯化反应中的应用进展。 相似文献
18.
19.
20.
Summary Ion exchange between H+ and Eu3+ ions was studied in the material modified byin situ sorption and thermal polymerization of acrylic acid in low density polyethylene films (LDPE-PAA). The effects of the temperature and film thickness on the ion exchange were observed using fluorescence spectroscopy. The ion exchange was investigated at 60, 70 and 80°C and was most efficient at 80°C. At this temperature 42% of the ion exchange at the saturation time was observed in the matrix (200 um thick). The percent of ion exchange at saturation increases with the matrix film thickness reaching 72% of Eu3+ions in LDPE-PAA. Ion exchange occurs mainly in the film surface or in the neighbouring layers. 相似文献