CAJ | 학술논문

采用3种不同粒径的纳米金刚石与树脂基体、光固化剂和其他填料复合，合成光固化复合树脂。探讨纳米金刚石对光固化复合树脂挠曲强度、固化深度等性能的作用规律。结果表明，纳米金刚石可显著地增强树脂的挠曲强度、弹性模量等机械性能，但也会降低树脂的固化深度。发现纳米金刚石对光固化复合树脂的增强作用中存在逾渗现象，即当纳米金刚石含量达到一定数值后会导致树脂的机械性能明显降低。性能最佳的光固化复合树脂应该选择粒径为220 nm的纳米金刚石，其添加量在0.15%左右为宜。
채용3충불동립경적납미금강석여수지기체、광고화제화기타전료복합，합성광고화복합수지。탐토납미금강석대광고화복합수지뇨곡강도、고화심도등성능적작용규률。결과표명，납미금강석가현저지증강수지적뇨곡강도、탄성모량등궤계성능，단야회강저수지적고화심도。발현납미금강석대광고화복합수지적증강작용중존재유삼현상，즉당납미금강석함량체도일정수치후회도치수지적궤계성능명현강저。성능최가적광고화복합수지응해선택립경위220 nm적납미금강석，기첨가량재0.15%좌우위의。
Light-cured composite resins were prepared by illuminating a cylinder with a diameter of 4 mm and a length of 6 mm for 40 s, using bisphenol A ethoxylate dimethacrylate as monomer, triethyleneglycol dimethacrylate as diluting agent, camphoroqui-none and dimethyaminoethyl methacrylate as photoinitiators and nanodiamonds as reinforcements. The nanodiamonds were of differ-ent size and were surface-modified by methacryloxypropyltrimethoxy silane. The flexural strength, elastic modulus and other me-chanical properties of the resins were investigated to determine how the nanodiamonds influenced the properties of the composite res-ins. Results showed that the nanodiamonds significantly improved flexural strength and elastic modulus of the composite resins, but also decreased their depth of light-curing. A percolation phenomenon was found in the composite resins, which indicated that their mechanical properties decreased significantly when the nanodiamond content was greater than a value depending on their size.