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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Surface modification and biotribological behavior of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction
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Surface modification and biotribological behavior of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction

机译：UHMWPE纳米复合材料用超声诱导渗透的表面改性和生物学行为

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摘要

In this study, we have innovatively proposed a method for surface modification of ultra-high molecular weight polyethylene (UHMWPE) artificial joint materials with graphene oxide (GO) infiltrated into UHMWPE substrate by ultrasonic induction. The mechanical properties of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction were compared with that of GO mixed. The molecular structure, wettability, peak load, and bio-tribological behavior of GO/UHMWPE nanocomposites were studied using fourier transform infrared spectroscopy, contact angle measuring instrument, electronic universal material testing machine, tribometer, and profilometer, respectively. The results show that the ultrasonic-induction method can make GO adhere to UHMWPE surface well, and GO can significantly improve the wettability of UHMWPE substrate. When the ultrasound-inducted time is up to 12 hr, the wetting angle of the nanocomposites (12 h-GO/UHMWPE) is reduced to 65.24 degrees, which is 20.51% lower than that of the pure UHMWPE. The peak load is 183 N, which is 20.22% higher than that of GO/UHMWPE prepared by the mixing method. The bio-tribological property of UHMWPE nanocomposites with GO infiltrated by ultrasonic induction for 12 hr (12 h-GO/UHMWPE) is the best, and its friction coefficient keeps more stable at a value of 0.0605 under the lubrication of calf serum, which is 11.81% lower than that of UHMWPE mixed with GO by a traditional method, and the wear rate is decreased to 3.25 x 10(-5)mm(3)N(-1) m(-1).
机译：在本研究中，我们创新性地提出了一种超高分子量聚乙烯（UHMWPE）人工关节材料的表面改性方法，即通过超声感应将氧化石墨烯（GO）渗透到UHMWPE基材中。比较了超声诱导渗透GO和混合GO的UHMWPE纳米复合材料的力学性能。分别采用傅里叶变换红外光谱、接触角测量仪、电子万能材料试验机、摩擦学仪和表面轮廓仪研究了GO/UHMWPE纳米复合材料的分子结构、润湿性、峰值载荷和生物摩擦学行为。结果表明，超声诱导法能使GO与UHMWPE表面良好粘附，GO能显著改善UHMWPE基体的润湿性。当超声诱导时间达到12h时，纳米复合材料（12h-GO/UHMWPE）的润湿角降低到65.24度，比纯UHMWPE低20.51%。峰值负荷为183N，比混合法制备的GO/UHMWPE高20.22%。超声诱导渗GO 12小时（12h-GO/UHMWPE）的UHMWPE纳米复合材料的生物摩擦学性能最好，在小牛血清的润滑下，其摩擦系数保持在0.0605，比传统方法掺GO的UHMWPE低11.81%，磨损率降至3.25×10（-5）mm（3）N（-1）m（-1）。

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