GOALI: Mechanical and Molecular Behavior of Nanoparticulate/Polymer Composites

目标：纳米颗粒/聚合物复合材料的机械和分子行为

• 批准号: 9871894
• 负责人: Linda Schadler
• 金额: $ 57.77万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9871894&HistoricalAwards=false
• 关键词: GOALI; Mechanical; Molecular; Behavior; Nanoparticulate

Abstract 9871894, Schadler/RPI Recent work has shown that the modulus, strain to failure, and strength of polymer composites can be increased simultaneously with nanosized particle filler. This is not observed in micron sized filled systems. This proposal has dual objectives: 1) to create and investigate novel nanofiller/polymer composites for engineering application sand 2) to develop a fundamental understanding of their structure-property relationships through understanding the effects of particle dispersion, particle structure and surface chemistry, and polymer chain stiffness on the size of the bound polymer layer and on the mechanical properties. Nanoparticle fillers will be synthesized using the gas condensation method. A wide range of metal, ceramic, and composite nanoparticles will be synthesized in the size (diameter) range of 5-50 nm by this method. In addition, the nanoparticles can be coated to modify their surfaces. Nanofiller/polymer composites will be prepared using elastomers, thermoplastics, and thermosets. Microstructural characterization will be done using a variety of techniques such as TEM, SEM and X-ray diffraction. The effect of the nanoparticle on the surrounding polymer region will be used to confirm the NMR observations on a more macroscopic scale. Micro-Raman spectroscopy will be used to gain an understanding of the micro(nano)mechanical behavior. The measured mechanical properties of these new composites will be compared with those of existing fiber and particle filled composites. This research is relevant to fabrication of high modulus, high strength polymer composites. Research on the fabrication and testing of nanocomposites will complement an educational initiative at RPI on nanomaterials. This project results from a proposal submitted in response to NSF 98-20, Partnership in Nanotechnology: Synthesis, Processing, and Utilization of Functional Nanostructures (FNS).

摘要 9871894，Schadler/RPI 最近的工作表明，使用纳米颗粒填料可以同时提高聚合物复合材料的模量、失效应变和强度。 这在微米尺寸的填充系统中没有观察到。 该提案具有双重目标：1）创建和研究用于工程应用的新型纳米填料/聚合物复合材料2）通过了解颗粒分散、颗粒结构和表面化学以及聚合物的影响，对其结构-性能关系有基本的了解链刚度对结合聚合物层的尺寸和机械性能的影响。 纳米颗粒填料将使用气体冷凝法合成。 通过该方法将合成尺寸（直径）范围为 5-50 nm 的各种金属、陶瓷和复合纳米颗粒。 此外，可以对纳米颗粒进行涂层以改性其表面。 纳米填料/聚合物复合材料将使用弹性体、热塑性塑料和热固性材料制备。 微观结构表征将使用多种技术来完成，例如 TEM、SEM 和 X 射线衍射。 纳米颗粒对周围聚合物区域的影响将用于在更宏观的尺度上确认核磁共振观察结果。 显微拉曼光谱将用于了解微（纳米）机械行为。 这些新型复合材料的测量机械性能将与现有纤维和颗粒填充复合材料的机械性能进行比较。 这项研究与高模量、高强度聚合物复合材料的制造相关。 纳米复合材料的制造和测试研究将补充 RPI 关于纳米材料的教育计划。 该项目源自针对 NSF 98-20“纳米技术合作伙伴：功能纳米结构 (FNS) 的合成、加工和利用”而提交的提案。