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首页> 外文期刊>Journal of Materials Research >Monodisperse Sic/vinyl Ester Nanocomposites: Dispersant Formulation, Synthesis, And Characterization
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Monodisperse Sic/vinyl Ester Nanocomposites: Dispersant Formulation, Synthesis, And Characterization

机译：单分散Sic /乙烯基酯纳米复合材料：分散剂的配制，合成和表征

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摘要

A novel dispersant "mono-2-(methacryloyloxy)ethyl succinate" was formulated for dispersing 30-nm SiC nanoparticles in vinyl ester resin. The eight carbon rule was used as the guideline to achieve a particle-particle separation of 20 to 60 nm for colloid stability. Fourier transform infrared spectroscopy was performed to characterize the SiC particle surfaces. Only a negligible amount of oxidized layer was observed; which illustrates that the SiC surface is basic. Thus, the Lewis base-Lewis acid reactions make the functional group -COOH an effective adsorbate to the SiC nanoparticle surface. The organofunctional group "methacrylates," which exhibits the best wet strength with polyester copolymerizes with styrene monomers in the vinyl ester during cure. Hence, this novel dispersant also acts as an efficient coupling agent that reacts with both SiC and vinyl ester. The monolayer coverage dosage of 62 fractional wt% of the dispersant was used to attain the minimum filled resin viscosity. The multicomponent compositional imaging using atomic force microscopy confirmed the monodisperse SiC nanoparticles in vinyl ester. The 3 vol% SiC reinforced vinyl ester achieved a 75% increase in modulus, 42% increase in strength, and 75% increase in toughness as compared with the neat resin without nanofiller reinforcement.
机译：配制了新型分散剂“单-2-（甲基丙烯酰氧基）乙基琥珀酸酯”，用于将30 nm SiC纳米颗粒分散在乙烯基酯树脂中。八碳法则用作指导以实现胶体稳定性达到20至60 nm的颗粒间距离。进行傅立叶变换红外光谱以表征SiC颗粒表面。观察到的氧化层量可忽略不计。这说明SiC表面是基本的。因此，路易斯碱-路易斯酸反应使官能团-COOH有效地吸附到SiC纳米颗粒表面。与聚酯表现出最佳湿强度的有机官能团“甲基丙烯酸酯”在固化过程中与乙烯基酯中的苯乙烯单体共聚。因此，这种新型分散剂还充当了与SiC和乙烯基酯反应的有效偶联剂。分散剂的62重量％的单层覆盖剂量用于获得最小的填充树脂粘度。使用原子力显微镜的多组分组成成像证实了乙烯基酯中的单分散SiC纳米颗粒。与没有纳米填料增强的纯树脂相比，3体积％SiC增强的乙烯基酯的模量增加了75％，强度增加了42％，韧性增加了75％。

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  • 来源
    《Journal of Materials Research》 |2009年第4期|1553-1558|共6页
  • 作者

    Virginia Yong; H. Thomas Hahn;

  • 作者单位

    Department of Materials Science and Engineering, University of California-Los Angeles, Los Angeles, California 90095;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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