CAJ | 학술논문

目的研究PAN-PMMA核壳纳米纤维对牙科光固化树脂基体力学性能的增强效果.方法通过静电纺丝法制备PAN-PMMA核壳纳米纤维,同时将纳米纤维分别按1wt%、2wt%、3wt%和5wt%的质量比直接纺入Bis-GMA/TEGDMA光固化树脂单体制成纳米纤维树脂复合物.空白组是Bis-GMA/TEGDMA纯光固化树脂.在万能力学测试机上用三点弯曲法测试各组的弯曲强度、模量及断裂功,用SPSS软件进行统计学分析.SEM观察各组样条断面纤维与树脂界面及纤维分散状态.结果 2wt%纳米纤维增强组弯曲强度和模量及断裂功较空白组分别增加了25%、74%、47%,统计学分析有显著性差异(P＜0.05);SEM结果显示断面拔出的纤维表面粗糙,纤维分散均匀,有较好的界面形成.结论 2wt%质量比的PAN-PMMA核壳纳米纤维可以提高光固化树脂基质的力学性能.
목적 연구PAN-PMMA핵각납미섬유대아과광고화수지기체역학성능적증강효과.방법 통과정전방사법제비PAN-PMMA핵각납미섬유,동시장납미섬유분별안1wt%、2wt%、3wt%화5wt%적질량비직접방입Bis-GMA/TEGDMA광고화수지단체제성납미섬유수지복합물.공백조시Bis-GMA/TEGDMA순광고화수지.재만능역학측시궤상용삼점만곡법측시각조적만곡강도、모량급단렬공,용SPSS연건진행통계학분석.SEM관찰각조양조단면섬유여수지계면급섬유분산상태.결과 2wt%납미섬유증강조만곡강도화모량급단렬공교공백조분별증가료25%、74%、47%,통계학분석유현저성차이(P＜0.05);SEM결과현시단면발출적섬유표면조조,섬유분산균균,유교호적계면형성.결론 2wt%질량비적PAN-PMMA핵각납미섬유가이제고광고화수지기질적역학성능.
Objective To study the effects of core-shell PAN-PMMA nanofibers on the mechanical properties of Bis-GMA/TEGDMA light-cured dental resin matrix.Methods The PAN-PMMA core-shell nanofibers fabricated with electrospun technique were blended with Bis-GMA/TEGDMA Light-cured resin matrices at the mass ratio of 1wt%, 2wt%, 3wt%, and 5wt% respectively. Specimens without PAN-PMMA nanofibers were used as control. The flexural strength (FS), flexural modulus (FM) and work of fracture (WOF) of the samples were measured with three-point bending tests. Statistics was analyzed with SPSS software. Fractured surfaces were examined with SEM to investigate the distribution of nanofibers and the fiber-matrix interface.Results The addition of 2wt% (mass fraction) nanofibers improved FS by 25%, FM by 74%, and WOF by 47% over those of the control samples. SEM examinations showed that the pulled-out PAN-PMMA fibers on the broken surfaces were rough and nanofibers were well-distributed in the resin matrices.Conclusion The mechanical properties of the light-cured resin were significantly improved with the addition of 2wt% PAN-PMMA core-shell nanofibers.