Arumugam Soundhar, Kandasamy Jayakrishna, Md Shah Ain Umaira, Hameed Sultan Mohamed Thariq, Safri Syafiqah Nur Azrie, Abdul Majid Mohd Shukry, Basri Adi Azriff, Mustapha Faizal
School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632014, India.
Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia.
Polymers (Basel). 2020 Jul 6;12(7):1501. doi: 10.3390/polym12071501.
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.
本研究旨在探索用于骨科长骨板应用的混杂玻璃纤维（GF）/剑麻纤维（SF）/壳聚糖（CTS）复合材料的力学性能。GF/SF/CTS混杂复合材料具有独特的三明治结构，由GF/CTS/环氧树脂作为外层和SF/CTS/环氧树脂作为内层组成。复合板类似于人体骨骼结构（内部为海绵状松质基质，外部为坚硬皮质）。使用拉伸、弯曲、显微硬度和压缩试验对制备的混杂三明治复合材料样品的力学性能进行了评估。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制。此外，采用 sessile drop 法进行了接触角（CA）和吸水性试验，以研究 SF/CTS/环氧树脂和 GF/SF/CTS/环氧树脂复合材料的润湿性。此外，采用乙醇浸润法测定了GF/SF/CTS复合支架样品的孔隙率。力学试验结果表明，GF/SF/CTS混杂复合材料的弯曲强度为343MPa，极限拉伸强度为146MPa，抗压强度为380MPa，在弯曲试验中的杨氏模量（21.56GPa）高于拉伸模量（6646MPa）和压缩模量（2046MPa）。润湿性研究结果表明，与SF/CTS复合材料（6.953%）相比，GF/SF/CTS复合支架具有疏水性（CA = 92.41°±1.71°），吸水率较低，为3.436%。SF/CTS复合材料表现出亲水性（CA = 54.28°±3.06°）。实验测试证明，GF/SF/CTS混杂复合材料未来可用于骨科骨折板应用。
