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用于去除肾衰竭患者尿毒症毒素的沸石-聚合物复合纳米纤维的制备

Fabrication of zeolite-polymer composite nanofibers for removal of uremic toxins from kidney failure patients.

作者信息

Namekawa Koki, Tokoro Schreiber Makoto, Aoyagi Takao, Ebara Mitsuhiro

机构信息

Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.

出版信息

Biomater Sci. 2014 May 1;2(5):674-679. doi: 10.1039/c3bm60263j. Epub 2014 Jan 31.

Abstract

There is a need to develop a simple, cheap, and accessible method of treating patients with kidney failure, especially in resource-limited environments such as disaster areas and the developing world due to the inaccessibility of conventional hemodialysis treatments. In this study, we develop a zeolite-polymer composite nanofiber mesh to remove uremic toxins for blood purification. The nanofiber is composed of blood compatible poly(ethylene-co-vinyl alcohol) (EVOH) as the primary matrix polymer and zeolites which are capable of selectively adsorbing uremic toxins such as creatinine. The composite fiber meshes were produced by a cost-effective electrospinning method: electrospinning composite solutions of EVOH and zeolites. Scanning electron microscope (SEM) images revealed that the 7 w/v% EVOH solution produced non-woven fibers with a continuous and smooth morphology. The SEM also showed that over 90% of zeolites in the solution were successfully incorporated into the EVOH nanofibers. Although the barrier properties of the EVOH matrix lowered the creatinine adsorption capacity of the zeolites in the fiber when compared with adsorption to free zeolites, their adsorption capacity was still 67% of the free zeolites. The proposed composite fibers have the potential to be utilized as a new approach to removing nitrogenous waste products from the bloodstream without the requirement of specialized equipment.

摘要

由于传统血液透析治疗难以获得,在诸如灾区和发展中世界等资源有限的环境中,需要开发一种简单、廉价且易于获得的治疗肾衰竭患者的方法。在本研究中,我们开发了一种沸石 - 聚合物复合纳米纤维网,用于去除尿毒症毒素以进行血液净化。纳米纤维由具有血液相容性的聚(乙烯 - 共 - 乙烯醇)(EVOH)作为主要基质聚合物和能够选择性吸附肌酐等尿毒症毒素的沸石组成。复合纤维网通过一种经济高效的静电纺丝方法制备:静电纺丝EVOH和沸石的复合溶液。扫描电子显微镜(SEM)图像显示,7 w/v%的EVOH溶液产生了具有连续且光滑形态的非织造纤维。SEM还表明,溶液中超过90%的沸石成功地掺入到EVOH纳米纤维中。尽管与游离沸石的吸附相比,EVOH基质的阻隔性能降低了纤维中沸石对肌酐的吸附能力,但其吸附能力仍为游离沸石的67%。所提出的复合纤维有潜力作为一种无需专门设备即可从血液中去除含氮废物的新方法加以利用。

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