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。
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.
参考文献
| [1] | Anke Krueger .Beyond the shine: recent progress In applications of nanodiamond[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2011(34):12571-12578. |
| [2] | 刘晓新,周刚,文潮,孙德玉.纳米金刚石对橡胶力学性能的影响[J].特种橡胶制品,2001(05):14-16. |
| [3] | I. Neitzel;V. Mochalin;I. Knoke;G.R. Palmese;Y. Gogotsi .Mechanical properties of epoxy composites with high contents of nanodiamond[J].Composites science and technology,2011(5):710-716. |
| [4] | Maitra, U;Prasad, KE;Ramamurty, U;Rao, CNR .Mechanical properties of nanodiamond-reinforced polymer-matrix composites[J].Solid State Communications,2009(39/40):1693-1697. |
| [5] | A. P. Korobko;N. P. Bessonova;S. V. Krasheninnikov;E. V. Konyukhova;S. N. Drozd;S. N. Chvalun .Nanodiamonds as modifier of ethylene-1-octene copolymer structure and properties[J].Diamond and Related Materials,2007(12):2141-2144. |
| [6] | 顾晓宇,胡晓刚,彭东,王新知.纳米金刚石改性核树脂的机械及固化性能[J].华西口腔医学杂志,2007(06):525-528. |
| [7] | 钟玉修,倪龙兴,姜永,谢后光.纳米金刚石填料对复合树脂耐磨性能及挠曲强度的影响[J].口腔医学,2005(03):154-155. |
| [8] | Chu, Y.Q.;Tong, Y.;Zhang, T.L.;Huang, F.L.;Wang, X.Z. .Synthesis of nanodiamond reinforced dental composite resins and their mechanical properties[J].Fullerenes, nanotubes, and carbon nanostructures,2012(1/8):628-632. |
| [9] | 胡晓刚,顾晓宇,仝毅,张增明,罗运军,黄风雷,王新知.改性纳米金刚石增强增韧医用口腔复合树脂的研究[J].化工新型材料,2006(02):60-62,67. |
| [10] | 楚亚卿,仝毅,王新知,王琴.不同方法合成的金刚石对口腔复合树脂挠曲强度的影响[J].国际口腔医学杂志,2011(01):27-30. |
| [11] | Chu Y Q;Tong Y;Zhang T L et al.Mechanical properties of dental composite resins with nanodiamonds of different diame-ters[J].Journal of Beijing Institute of Technology,2012,21(01):19-22. |
| [12] | 贾向明,杨其,李光宪,姜苏俊,陆玉本,吴兆权.填充型导电高分子复合材料的逾渗理论进展[J].中国塑料,2003(06):9-14. |
| [13] | Zhenhua Wang;Jun Liu;Sizhu Wu .Novel percolation phenomena and mechanism of strengthening elastomers by nanofillers[J].Physical chemistry chemical physics: PCCP,2010(12):3014-3030. |
| [14] | Kloarik J;Lednicky F .Phase structure of ternary composites consisting of polypropylene/elstomer/filler:Effect of function-alized components[J].Polymer Communications,1990,31:201-204. |
| [15] | 陈奎,杨瑞成,张天云,成生伟,马建忠.聚丙烯/有机改性蒙脱土纳米复合材料的制备及力学性能研究[J].兰州理工大学学报,2006(06):24-27. |
| [16] | Wolfgang Bauhofer;Josef Z. Kovacs .A review and analysis of electrical percolation in carbon nanotube polymer composites[J].Composites science and technology,2009(10):1505-1515. |
| [17] | Protopapa P;Kontonasaki E;Bikiaris D et al.Reinforcement of a PMMA resin for fixed interim prostheses with nanodia-monds[J].Dental Materials,2011,30(02):222-231. |
| [18] | Wu S H .Phase structure and adhesion in polymer blends:A criterion for rubber toughening[J].POLYMER,1985,26(12):1855-1863. |
| [19] | Margolina A;Wu S H .Percolation model for brittle-tough tran-sition in Nylon/Rubber blends[J].POLYMER,1988,29(12):2170-2173. |
| [20] | 夏春明,伊丽努力,禹杰,王莹,王军力.复合树脂薄片的透光率及其对树脂固化深度的影响[J].口腔医学,2003(01):7-9. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%