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明胶包覆羰基铁颗粒及其在磁流变悬浮液中的应用。

Gelatine-Coated Carbonyl Iron Particles and Their Utilization in Magnetorheological Suspensions.

作者信息

Plachy Tomas, Rohrer Patrik, Holcapkova Pavlina

机构信息

Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, třída Tomáše Bati 5678, 760 01 Zlín, Czech Republic.

出版信息

Materials (Basel). 2021 May 12;14(10):2503. doi: 10.3390/ma14102503.

DOI:10.3390/ma14102503
PMID:34066006
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8151537/
Abstract

This study demonstrates the formation of biocompatible magnetic particles into organized structures upon the application of an external magnetic field. The capability to create the structures was examined in silicone-oil suspensions and in a gelatine solution, which is commonly used as a blood plasma expander. Firstly, the carbonyl iron particles were successfully coated with gelatine, mixed with a liquid medium in order to form a magnetorheological suspension, and subsequently the possibility of controlling their rheological parameters via a magnetic field was observed using a rotational rheometer with an external magnetic cell. Scanning electron microscopy, infrared spectroscopy, and thermogravimetric analysis confirmed the successful coating process. The prepared magnetorheological suspensions exhibited a transition from pseudoplastic to Bingham behavior, which confirms their capability to create chain-like structures upon application of a magnetic field, which thus prevents the liquid medium from flowing. The observed dynamic yield stresses were calculated using Robertson-Stiff model, which fit the flow curves of the prepared magnetorheological suspensions well.

摘要

本研究表明，在施加外部磁场时，生物相容性磁性颗粒会形成有组织的结构。在硅油悬浮液和通常用作血浆扩容剂的明胶溶液中，对形成这些结构的能力进行了研究。首先，羰基铁颗粒成功地用明胶包覆，与液体介质混合以形成磁流变悬浮液，随后使用带有外部磁单元的旋转流变仪观察通过磁场控制其流变参数的可能性。扫描电子显微镜、红外光谱和热重分析证实了包覆过程的成功。制备的磁流变悬浮液表现出从假塑性到宾汉行为的转变，这证实了它们在施加磁场时形成链状结构的能力，从而阻止液体介质流动。使用罗伯逊-斯蒂夫模型计算观察到的动态屈服应力，该模型与制备的磁流变悬浮液的流动曲线拟合良好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/b5323ed46402/materials-14-02503-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/21cac916ea26/materials-14-02503-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/bdaa2e36991a/materials-14-02503-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/c6f780437826/materials-14-02503-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/2e9d523cc04d/materials-14-02503-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/4ffbb9a4b1f4/materials-14-02503-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/bdf28d89c71f/materials-14-02503-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/1f3d6a2a6ef5/materials-14-02503-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/5e737b9b0fd8/materials-14-02503-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/b5323ed46402/materials-14-02503-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/21cac916ea26/materials-14-02503-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/bdaa2e36991a/materials-14-02503-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/c6f780437826/materials-14-02503-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/2e9d523cc04d/materials-14-02503-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/4ffbb9a4b1f4/materials-14-02503-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/bdf28d89c71f/materials-14-02503-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/1f3d6a2a6ef5/materials-14-02503-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/5e737b9b0fd8/materials-14-02503-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b33/8151537/b5323ed46402/materials-14-02503-g009.jpg

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