Visco Annamaria, Scolaro Cristina, Quattrocchi Antonino, Montanini Roberto
Department of Engineering, University of Messina, C.da di Dio, 98166 Messina, Italy.
Institute for Polymers, Composites and Biomaterials-CNR IPCB, Via Paolo Gaifami 18, 95126 Catania, Italy.
Polymers (Basel). 2020 Nov 13;12(11):2681. doi: 10.3390/polym12112681.
Polymeric joints, made of biomedical polyethylene (UHMWPE) nanocomposite sheets, were welded with a diode laser. Since polyethylene does not absorb laser light, nanocomposites were prepared containing different percentages by weight of titanium dioxide as it is a laser absorbent. The joints were first analyzed with static mechanical tests to establish the best percentage weight content of filler that had the best mechanical response. Then, the nanocomposites containing 1 wt% titanium dioxide were selected (white color) to be subjected to fatigue tests. The experimental results were also compared with those obtained on UMMWPE with a different laser light absorbent nano filler (carbon, with greater laser absorbing power, gray in color), already studied by our research team. The results showed that the two types of joints had an appreciable resistance to fatigue, depending on the various loads imposed. Therefore, they can be chosen in different applications of UHMWPE, depending on the stresses imposed during their use.
由生物医学聚乙烯（超高分子量聚乙烯，UHMWPE）纳米复合片材制成的聚合物接头，采用二极管激光器进行焊接。由于聚乙烯不吸收激光，因此制备了含有不同重量百分比二氧化钛的纳米复合材料，因为二氧化钛是一种激光吸收剂。首先对接头进行静态力学测试，以确定具有最佳力学响应的填料的最佳重量含量百分比。然后，选择含有1 wt%二氧化钛的纳米复合材料（白色）进行疲劳测试。实验结果还与我们研究团队之前研究的、使用不同激光吸收纳米填料（具有更大激光吸收能力的碳，灰色）的超高分子量聚乙烯（UMMWPE）接头所获得的结果进行了比较。结果表明，根据施加的各种载荷，这两种类型的接头都具有相当可观的抗疲劳能力。因此，根据其使用过程中所承受的应力，它们可被选用于超高分子量聚乙烯的不同应用中。
