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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Engineering porous polyurethane scaffolds by photografting polymerization of methacrylic acid for improved endothelial cell compatibility
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Engineering porous polyurethane scaffolds by photografting polymerization of methacrylic acid for improved endothelial cell compatibility

机译:通过光接枝甲基丙烯酸聚合反应来工程化多孔聚氨酯支架,以改善内皮细胞的相容性

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摘要

Using a preadsorbing-monomer method, polyurethane (PU) porous scaffolds were modified by grafting polymerization of methacrylic acid (MAA) initiated under UV light. Fourier transform infrared-attenuated total reflection spectroscopy and X-ray photoelectron spectroscopy characterizations confirmed the occurrence of the grafting polymerization of poly(methacrylic acid) (PMAA) on PU scaffolds and the measurement of water adsorption also demonstrated enhanced hydrophilicity. The PMAA grafting degree correlated to the amount of MAA adsorbed, the pore average diameter, and the porosity. It was verified that the higher porosity the scaffold has, the larger porous area (or the larger contact area with MAA) it has, and therefore the higher amount of MAA adsorbed and higher grafting degree obtained. The results of human endothelial cells cultured in vitro showed that the PU scaffolds modified with the hydrophilic PMAA had more improved cell compatibility than the control matrix.
机译:使用预吸附单体方法,通过在紫外光下引发的甲基丙烯酸(MAA)的接枝聚合反应来改性聚氨酯(PU)多孔支架。傅里叶变换红外衰减全反射光谱和X射线光电子能谱表征证实了聚(甲基丙烯酸)(PMAA)在PU支架上的接枝聚合反应的发生,并且对水吸附的测量也显示出增强的亲水性。 PMAA的接枝度与吸附的MAA量,平均孔径和孔隙率相关。已经证实,支架的孔隙率越高,其具有的多孔面积越大(或与MAA的接触面积越大),因此,MAA的吸附量越高,接枝度越高。体外培养的人内皮细胞的结果表明,用亲水性PMAA修饰的PU支架比对照基质具有更好的细胞相容性。

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