用纳米 Al2O3 增强的义齿基底聚甲基丙烯酸甲酯的机械性能和耐磨性能

IF 3.6 4区材料科学 Q2 MATERIALS SCIENCE, COMPOSITES

Journal of Thermoplastic Composite Materials Pub Date : 2024-03-21 DOI:10.1177/08927057241241500

Ramy A Fouad, Amal AA Ibrahim, Mohamed M El-Sayed Seleman, Sabbah Ataya, Mohamed Ibrahim AA Habba

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引用次数: 0

摘要

聚甲基丙烯酸甲酯（PMMA）已被广泛用作牙科材料。纯 PMMA 义齿的老化是一个重要问题，会改变义齿的垂直尺寸。本研究探讨了在热固化丙烯酸树脂义齿中添加氧化铝（Al2O3）纳米陶瓷作为增强材料的效果。添加浓度分别为 1、3、5 和 10 wt.% 的 Al2O3 增强 PMMA。为便于比较，还生产了不添加陶瓷的 PMMA。研究了所生产的 PMMA 树脂及其复合材料的颜色变化、致密化、显微硬度和压缩性能，以检测添加 Al2O3 纳米陶瓷对物理和机械性能的影响。此外，还使用扫描电子显微镜（SEM）分析了微观结构。利用咀嚼模拟器，采用人体牙釉质拮抗剂进行双体磨损测试。在对 PMMA 及其复合材料进行 37,500 次循环后，通过测量重量损失来评估其磨损行为。SEM 显微结构分析表明，使用 0、1、3 和 5 wt.% Al2O3 增强的 PMMA 试样完好无损，没有任何气孔和微缺陷。相反，在 PMMA/10 wt.% Al2O3 试样中发现了聚集点和裂纹扩展。随着 Al2O3 添加量的增加，生产出的 PMMA 复合材料的致密性和硬度性能都有所改善。与 PMMA 基体相比，PMMA/10 wt.% Al2O3 的显微硬度提高了约 233%。PMMA/5 wt.% Al2O3 复合材料试样的抗压性能更高，极限抗压强度（UCS）为 54.75 兆帕，屈服强度（YS）为 45.6 兆帕，分别比 PMMA 基体提高了约 98 % 和 117 %。此外，在 PMMA 基体中加入 Al2O3 纳米陶瓷颗粒后，与 PMMA 基体相比，所生产的复合材料的耐磨性显著提高。

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Mechanical properties and wear performance of denture base polymethyl methacrylate reinforced with nano Al2O3

Polymethyl methacrylate (PMMA) has been widely used as a material in dentistry. The deterioration of pure PMMA denture teeth is a significant issue that can alter the vertical dimensions of dentures. This study investigates the effect of aluminum oxide (Al2O3) nano-ceramic addition as reinforcements into the heat-cure acrylic resin denture teeth. The PMMA was reinforced with Al2O3 concentrations of 1, 3, 5, and 10 wt.%. The PMMA without ceramic addition is produced for comparison purposes. The color change, densification, microhardness, and compressive properties of the produced PMMA resin and its composites were investigated to detect the effect of Al2O3 nano ceramic addition on the physical and mechanical properties. Furthermore, the microstructure was also performed using scanning electron microscopy (SEM) analysis. A chewing simulator was utilized to conduct two-body wear testing, employing a human enamel antagonist. The wear behavior of the PMMA and their composites were assessed by measuring the weight loss after submitting them to 37,500 cycles. The SEM microstructure analysis revealed sound specimens of PMMA reinforced with 0, 1, 3, and 5 wt.% Al2O3 without any porosity and micro defects using the applied production procedures. In contrast, the aggregated sites and propagation of cracks were detected for the PMMA/10 wt.% Al2O3 specimen. The densification and hardness properties of the produced PMMA composites improved with increasing the Al2O3 additions. The microhardness of PMMA/10 wt.% Al2O3 improved by around 233% compared to the PMMA matrix. The higher compressive properties were detected for the PMMA/5 wt.% Al2O3 composite specimen with ultimate compressive strength (UCS) of 54.75 MPa and yield strength (YS) of 45.6 MPa and improved than the PMMA matrix by around 98 % and 117 %, respectively. In addition, incorporating Al2O3 nano-ceramic particles into a PMMA matrix revealed a significant improvement in the wear resistance of the produced composites compared to the PMMA matrix.

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来源期刊

Journal of Thermoplastic Composite Materials 工程技术-材料科学：复合

CiteScore

8.00

自引率

18.20%

发文量

104

审稿时长

5.9 months

期刊介绍： The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).