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首页> 美国卫生研究院文献>Polymers >Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications
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Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

机译：对玻璃纤维/壳聚糖的力学性能的研究用于骨折固定应用的玻璃纤维/纤维/壳聚糖增强杂种聚合物夹层复合支架

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摘要

This study aims to explore the mechanical properties of hybrid glass fiber (GF)/sisal fiber (SF)/chitosan (CTS) composite material for orthopedic long bone plate applications. The GF/SF/CTS hybrid composite possesses a unique sandwich structure and comprises GF/CTS/epoxy as the external layers and SF/CTS/epoxy as the inner layers. The composite plate resembles the human bone structure (spongy internal cancellous matrix and rigid external cortical). The mechanical properties of the prepared hybrid sandwich composites samples were evaluated using tensile, flexural, micro hardness, and compression tests. The scanning electron microscopic (SEM) images were studied to analyze the failure mechanism of these composite samples. Besides, contact angle (CA) and water absorption tests were conducted using the sessile drop method to examine the wettability properties of the SF/CTS/epoxy and GF/SF/CTS/epoxy composites. Additionally, the porosity of the GF/SF/CTS composite scaffold samples were determined by using the ethanol infiltration method. The mechanical test results show that the GF/SF/CTS hybrid composites exhibit the bending strength of 343 MPa, ultimate tensile strength of 146 MPa, and compressive strength of 380 MPa with higher Young’s modulus in the bending tests (21.56 GPa) compared to the tensile (6646 MPa) and compressive modulus (2046 MPa). Wettability study results reveal that the GF/SF/CTS composite scaffolds were hydrophobic (CA = 92.41° ± 1.71°) with less water absorption of 3.436% compared to the SF/CTS composites (6.953%). The SF/CTS composites show a hydrophilic character (CA = 54.28° ± 3.06°). The experimental tests prove that the GF/SF/CTS hybrid composite can be used for orthopedic bone fracture plate applications in future.
机译：本研究旨在探讨用于矫形长骨板应用的杂种玻璃纤维（GF）/ SISAL纤维（SF）/壳聚糖（CTS）复合材料的机械性能。 GF / SF / CTS杂交复合材料具有独特的夹心结构，并包含GF / CTS /环氧树脂作为外层和SF / CTS /环氧树脂作为内层。复合板类似于人体骨结构（海绵内松质基质和刚性外皮）。使用拉伸，弯曲，微硬度和压缩试验评估制备的杂交夹层复合材料样品的机械性能。研究了扫描电子显微镜（SEM）图像以分析这些复合样品的失效机理。此外，使用无柄液滴方法进行接触角（CA）和吸水试验，以检查SF / CTS /环氧和GF / SF / CT /环氧复合材料的润湿性。另外，通过使用乙醇浸润方法测定GF / SF / CTS复合支架样品的孔隙率。机械测试结果表明，GF / SF / CTS杂交复合材料表现出343MPa的弯曲强度，最终拉伸强度为146MPa，以及380MPa的抗压强度，弯曲试验中的较高模量（21.56GPa）相比拉伸（6646MPa）和压缩模量（2046MPa）。润湿性研究结果表明，与SF / CTS复合材料相比，GF / SF / CTS复合支架疏水（CA = 92.41°±1.71°），吸水较少3.436％（6.953％）。 SF / CTS复合材料显示亲水性（CA = 54.28°±3.06°）。实验试验证明，GF / SF / CTS杂化复合材料可用于将来用于整形外科骨折板应用。

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