聚丙烯酰胺/Fe3O4磁诱导取向水凝胶的制备及性能研究
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TP212.9;TB324

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湖南省教育厅科学研究基金资助项目(24A0412)


Study on the Preparation and Properties of Polyacrylamide/Fe3O4 Magnetically Induced Oriented Hydrogel
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    摘要:

    以丙烯酰胺(AM)为基体原料,以N,N’-亚甲基双丙烯酰胺(MBAA)为交联剂,过硫酸铵(APS)为引发剂,在不同磁感应强度的磁场诱导条件下成功制备了聚丙烯酰胺/Fe3O4磁诱导取向水凝胶。傅里叶红外光谱表征结果表明,Fe3O4与聚丙烯酰胺之间形成了明显的分子间氢键。采用应变控制型旋转流变仪分别对聚丙烯酰胺/Fe3O4磁诱导取向水凝胶的力学性能和流变性能进行分析,并采用金相显微镜对该水凝胶的取向结构进行分析。结果表明,平行磁场取向水凝胶的拉伸强度、断裂伸长率都要优于垂直磁场取向水凝胶的;平行磁场取向水凝胶的力学性能优于零磁场取向水凝胶的;随着磁感应强度的增大,聚丙烯酰胺/Fe3O4磁诱导取向水凝胶的拉伸强度变大,取向结构更加明显;随着AM含量的增加,水凝胶的力学性能先升高后降低。聚丙烯酰胺/Fe3O4磁诱导取向水凝胶在磁响应智能仿生材料领域具有良好的应用前景。

    Abstract:

    Polyacrylamide/Fe3O4 (PAM/Fe3O4) magnetically induced oriented hydrogels were successfully prepared by using acrylamide (AM) as the matrix material, N,N’-methylenebisacrylamide (MBAA) as the crosslinking agent and ammonium persulfate (APS) as the initiator under different magnetic induction conditions. The results of Fourier transform infrared spectroscopy showed that obvious intermolecular hydrogen bonds were formed between Fe3O4 and polyacrylamide. The mechanical properties and rheological properties of PAM/Fe3O4 magnetically induced oriented hydrogels were analyzed by strain-controlled rotational rheometer, and the orientation structure of the hydrogels was analyzed by metallographic microscope. The results showed that the tensile strength and elongation at break of the parallel magnetic field oriented hydrogel were better than those of the vertical magnetic field oriented hydrogel. The mechanical properties of parallel magnetic field oriented hydrogels were better than those of zero magnetic field oriented hydrogels. With the increase of magnetic induction intensity, the tensile strength of PAM/Fe3O4 magnetic induction oriented hydrogel became larger, and the orientation structure was more obvious. With the increase of AM content, the mechanical properties of hydrogels increased first and then decreased. The PAM/Fe3O4 magnetically induced oriented hydrogel has a good application prospect in the field of magnetic response intelligent bionic materials.

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谢 涛,李祥刚,仝婧婧,郑虹丽,殷倩妹,冯 妍.聚丙烯酰胺/Fe3O4磁诱导取向水凝胶的制备及性能研究[J].包装学报,2025,17(4):96-103.

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  • 在线发布日期: 2025-07-14
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