华西口腔医学杂志 ›› 2019, Vol. 37 ›› Issue (4): 384-388.doi: 10.7518/hxkq.2019.04.008

• 基础研究 • 上一篇    下一篇

两种表面处理方法对改良型聚醚醚酮弯曲强度的影响

何光霁,张文云()   

  1. 昆明医科大学教学医院,联勤保障部队第九二〇医院口腔科,昆明 650032
  • 收稿日期:2018-07-22 修回日期:2019-05-07 出版日期:2019-08-01 发布日期:2019-08-23
  • 通讯作者: 张文云 E-mail:wenyunzh88@126.com
  • 作者简介:何光霁,住院医师,硕士,E-mail:guangji.he@foxmail.com

Effect of two kinds of surface pretreatments on bending strength to the modified polyetheretherketone

Guangji He,Wenyun Zhang()   

  1. Dept. of Stomatology, 920th Hospital of Joint Logistics Support Force, Teaching Hospital of Kunming Medical University, Kunming 650032, China
  • Received:2018-07-22 Revised:2019-05-07 Online:2019-08-01 Published:2019-08-23
  • Contact: Wenyun Zhang E-mail:wenyunzh88@126.com

摘要:

目的 通过三点弯曲试验,评价表面喷砂及酸蚀处理对改良型聚醚醚酮(PEEK)强度的影响。方法 制作15 mm×2 mm×1 mm的改良型PEEK(BioHPP)试件48个,随机分为A~H组,A、B、C组喷砂压力均为0.2 MPa,喷砂粒度依次为120、50、250 μm;D组则在0.7 MPa压力下120 μm粒径喷砂;E、F、G组分别采用98%浓硫酸酸蚀60、120、300 s,H组(对照组)不进行任何表面处理。处理完成后,从各组中随机抽取一个试件用扫描电镜(SEM)观察其表面形貌,其余试件则进行三点弯曲强度测试。采用SPSS 22.0软件对实验数据进行统计分析,检验其差异是否具有统计学意义。结果 SEM观察结果表明,处理后试件表面形貌发生了变化,呈现出不同程度的裂隙、凹坑或孔洞。通过三点弯曲测试发现,与对照组相比,经喷砂或浓硫酸处理后试件强度均有所下降(P<0.05)。相同压力下,A、B、C组间弯曲强度差异无统计学意义(P>0.05);相同粒度下,D组试件的强度低于A组(P<0.05)。浓硫酸酸蚀处理后,E、F、G组试件的弯曲强度差异无统计学意义(P>0.05)。结论 表面喷砂或浓硫酸酸蚀均会使BioHPP的弯曲强度显著下降,其强度会随着喷砂的压力增加而明显下降,但不会随着喷砂粒径大小及酸蚀时长变化而发生显著的改变。

关键词: 聚醚醚酮, 表面处理, 弯曲强度

Abstract:

Objective To evaluate the effect of sandblasting or acid etching on the three-point bending strength to the modified polyetheretherketone (PEEK). Methods Forty-eight bars (15 mm×2 mm×1 mm) of specimens were fabricated from the modified PEEK (BioHPP). They were randomly divided into the following groups: A, B, C and D groups, which were blasted with alumina particles; E, F, and G groups, which were etched with 98% concentrated sulfuric acid; and control group H. The sand blast pressure of groups A, B and C was 0.2 MPa, and the grain sizes of the sand blasted were 120, 50, and 250 μm, respectively. Group D was blasted with 120 μm particle size at 0.7 MPa pressure. Groups E, F and G were acid etched for 60, 120, and 300 s, respectively. No surface treatment was conducted in group H. After all the specimens were processed, one sample was randomly selected from each group to observe its surface morphology under a scanning electron microscope (SEM), and the other specimens were tested for their three-point bending strength. SPSS 22.0 software was used to analyze the experimental data and to test whether the difference was statistically significant. Results SEM observation showed that the surface morphology of the specimen changed after the treatment and revealed different degrees of cracks, pits, or voids. The three-point bending test indicated that the strength of the specimens treated with sandblasting or concentrated sulfuric acid decreased compared with that of the control group (P<0.05). At the same pressure, no significant difference in flexural strength was observed among groups A, B, and C (P>0.05). The strength of group D was lower than that of group A at the same particle size (P<0.05), and no significant difference was found in the bending strength of the specimens etched with concentrated sulfuric acid (P>0.05). Conclusion The bending strength of BioHPP could be significantly decreased by surface sand blasting or concentrated sulfate etching as the sandblasting pressure increased, but the bending strength did not decrease as sand particle size and acid etching time changed.

Key words: polyetheretherketone, surface treatment, bending strength

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