Lim Yan Yik, Miskon Azizi, Zaidi Ahmad Mujahid Ahmad
Faculty of Defence Science and Technology, National Defence University of Malaysia, Prime Camp, Sungai Besi, Kuala Lumpur 57000, Malaysia.
Faculty of Engineering, National Defence University of Malaysia, Prime Camp, Sungai Besi, Kuala Lumpur 57000, Malaysia.
Materials (Basel). 2022 Jun 24;15(13):4446. doi: 10.3390/ma15134446.
The existing harder biomaterial does not protect the tissue cells with blunt-force trauma effects, making it a poor choice for the articular cartilage scaffold design. Despite the traditional mechanical strengths, this study aims to discover alternative structural strengths for the scaffold supports. The metallic filler polymer reinforced method was used to fabricate the test specimen, either low brass (CuZn) or titanium dioxide filler, with composition weight percentages (wt.%) of 0, 2, 5, 15, and 30 in polyester urethane adhesive. The specimens were investigated for tensile, flexural, field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD) tests. The tensile and flexural test results increased with wt.%, but there were higher values for low brass filler specimens. The tensile strength curves were extended to discover an additional tensile strength occurring before 83% wt.%. The higher flexural stress was because of the Cu solvent and Zn solute substituting each other randomly. The FESEM micrograph showed a cubo-octahedron shaped structure that was similar to the AuCu structure class. The XRD pattern showed two prominent peaks of 2θ of 42.6° (110) and 49.7° (200) with -spacings of 1.138 Å and 1.010 Å, respectively, that indicated the typical face-centred cubic superlattice structure with Cu and Zn atoms. Compared to the copper, zinc, and cart brass, the low brass indicated these superlattice structures had ordered-disordered transitional states. As a result, this additional strength was created by the superlattice structure and ordered-disordered transitional states. This innovative strength has the potential to develop into an anti-trauma biomaterial for osteoarthritic patients.
现有的较硬生物材料无法保护组织细胞免受钝力创伤影响，这使其成为关节软骨支架设计的不佳选择。尽管具有传统的机械强度，但本研究旨在探索支架支撑的替代结构强度。采用金属填料聚合物增强方法制备测试样品，填料为低黄铜（CuZn）或二氧化钛，在聚酯聚氨酯粘合剂中的组成重量百分比（wt.%）分别为0、2、5、15和30。对样品进行拉伸、弯曲、场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）测试。拉伸和弯曲测试结果随wt.%增加而提高，但低黄铜填料样品的值更高。拉伸强度曲线得到扩展，以发现重量百分比在83%之前出现的额外拉伸强度。较高的弯曲应力是由于铜溶剂和锌溶质相互随机替代。FESEM显微照片显示出一种立方八面体形状的结构，类似于AuCu结构类别。XRD图谱显示2θ为42.6°（110）和49.7°（200）的两个突出峰，其晶格间距分别为1.138 Å和1.010 Å，表明具有铜和锌原子的典型面心立方超晶格结构。与铜、锌和普通黄铜相比，低黄铜表明这些超晶格结构具有有序 - 无序过渡状态。因此，这种额外的强度是由超晶格结构和有序 - 无序过渡状态产生的。这种创新的强度有潜力发展成为一种用于骨关节炎患者的抗创伤生物材料。
