摘要
目的:探索一种新型增强材料聚甲基丙烯酸甘油酯(polyglycidyl methacrylate,PGMA)预浸润石英纤维网的界面结合性能和机械性能。方法:采用"三明治"埋入法制作PGMA预浸润石英纤维网(1层、2层、3层)、电解钴铬合金网、"喷砂+表面处理剂"预处理钴铬合金网增强的基托树脂标准实验模块,大小为40 mm×15 mm×2 mm,采用三点弯曲实验和扫描电镜对其抗折裂性能和界面结合性能进行研究。结果:3层PGMA预浸润石英纤维网增强基托树脂表现出最大的弹性模量(6 406 MPa)和弯曲强度(227 MPa),1层和2层PGMA预浸润石英纤维网增强效果并不明显。钴铬合金网具有增强效果,表面改性后增强效果更加明显。表面预处理钴铬合金网和PGMA预浸润石英纤维网与聚甲基丙烯酸甲酯(polymethyl methacrylate,PMMA)具有更好的界面结合性能。结论:PGMA预浸润石英纤维增强材料可以改进与PMMA的界面结合性能,并随着纤维层数的增多,其机械性能得到更大的改善。
Objective： To explore the reinforcement of polyglycidyl methacrylate（ PGMA） preimpregnated quartz fiber mesh in denture base materials by investigation of interface compatibility and fracture resistance. Methods： 1-layer,2-layer,3-layer PGMA pre-impregnated quartz fiber meshes,electrolyzed cobalt-chromium alloy mesh and cobalt-chromium alloy mesh conditioned by metal primer were integrated in polymethyl methacrylate（ PMMA） resin by sandwich embedding method. Block samples of 5 groups were prepared（ 40 mm × 15 mm × 2 mm）. Fracture resistance was determined in a 3-point bending test at 2 mm / min. Scanning electron microscope（ SEM）,micrographs were taken from the fractured surfaces to analyze the bonding interface compatibility. Results： The group of 3-layer PGMA pre-impregnated quartz fiber mesh presented the highest elastic modulus of 6 406 MPa and flexural strength of 227 MPa among the five groups,while the 1-layer and 2-layer expressed the similar elastic modulus and flexural strength to the pure PMMA group. The metal groups demonstrated better mechanical properties,while the metal surface conditioner played much better. The metal surface conditioner preimpregnated cobalt-chromium alloy and PGMA pre-impregnated quartz fiber mesh showed compatible interface with PMMA. Conclusion： The mechanical properties were improved by the increasing of the fiber by adding the more meshed. Although the benign interface did help the compatibility,the quantity of the fibers played an important role in the strength.
出处
《北京大学学报（医学版）》
CAS
CSCD
北大核心
2015年第1期62-66,共5页
Journal of Peking University:Health Sciences
基金
"十二五"国家科技支撑计划项目(2012BAI07B01)
教育部博士点基金(20122104120024)资助~~
作者简介
Corresponding auther＇ s e-mail, kqdengxuliang@ bjmu. edu. cn
