摘要
目的:利用玄武岩纤维加强聚甲基丙烯酸甲酯(PMMA)义齿基托材料,提高该材料的抗折裂能力。方法:采用长度分别为3、4和6mm的短切玄武岩纤维作为PMMA复合材料的加强体,玄武岩纤维加入量分别按占牙托粉质量的0、2%、4%和6%,制成64.0mm×10.0mm×3.0mm的试件,采用万能力学试验机和扫描电子显微镜分别对试件的挠曲强度、弹性模量以及断面的微观形貌进行测量和表征分析。结果:4mm纤维长度添加量在4%时,复合材料的挠曲强度和弹性模量分别为115.35MPa和3.49GPa,相比于0组[(102.50±1.56)MPa,(3.07±0.04)GPa]增强效果最为显著(P<0.05)。SEM分析结果显示,玄武岩纤维在复合材料中分散均匀,与PMMA基质结合良好。结论:合理选择短切玄武岩纤维的长度和添加量,可以提高传统义齿基托材的挠曲强度和弹性模量。
Objective：To study the mechanical properties of denture base resin enhanced by basalt fiber.Methods：A range of basalt fiber reinforced poly methyl methacrylate（PMMA） composites（64.0 mm×10.0 mm×3.0 mm）,were developed with fiber contents of 0,2%,4% and 6% by weight and fiber length of 3,4 and 6 mm.The flexural strength,flexural modulus and fracture surface morphology were characterized by universal testing machine and SEM.Results：When the fiber content and length were 4% and 4 mm respectively,the flexural strength and flexural modulus of the composite were improved most significantly compared with the control group,reaching up to 115.35 MPa and 3.49 GPa respectively.SEM observation showed that fiber could be uniformly dispersed in the composite and well bonded with PMMA matrix.Conclusion：The flexural strength and flexural modulus of the denture base resin can be improved by incorporating basalt fiber into PMMA.
出处
《东南大学学报（医学版）》
CAS
2010年第1期42-45,共4页
Journal of Southeast University(Medical Science Edition)
基金
国家973重大科学研究计划项目(2006CB933200)
国家杰出青年基金项目(60725101)
中芬科技合作项目(2008DFA51180)
