Materials World Network: Dynamics of Polymer Nanocomposites

材料世界网：聚合物纳米复合材料的动力学

• 批准号: EP/G065373/1
• 负责人: Nigel Clarke
• 金额: $ 38.31万
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FG065373%2F1
• 关键词: Materials; World; Network; Dynamics; Polymer

Polymer nanocomposites, namely mixtures of nanoparticles dispersed in a polymer matrix, have gained rapid attention for both industrial and fundamental studies since their introduction in the early 1990's. One of the first high impact applications was provided by Toyota Central Research (Kojima, 1993) who demonstrated that the addition of a few vol % of layered silicate greatly improved the mechanical properties of nylon 6. In fact, the commercial use of PNCs with improved elastic modulus, electrical conductivity, flame retardation and thermal conductivity can be found across many economic sectors including aerospace, electronics, and sporting applications. Whereas certain PNCs, such as polymer-nanoclay composites, appear to be reaching maturity, interest in systems with cylindrical nanoparticles, such as carbon nanotubes and metal nanowires, is increasing.The main objective of this research is to provide fundamental understanding of polymer dynamics in the presence of cylindrical nanoparticles using a coordinated experimental and theoretical approach. This proposed Materials World Network contains expertise in nanoparticle synthesis, nanocomposite fabrication, imaging, depth profiling, rheology, theory and simulation to systematically address how the presence of cylindrical nanoparticles with aspect ration from 2 to 500 impacts polymer dynamics. This MWN team has considerable experience in polymer nancomposites and is committed to working together to explore polymer diffusion and rheology in these fascinating and commercially-important materials.The proposed Materials World Network is well-positioned for groundbreaking insights into the physics of polymer nanocomposites that are likely to have positive impact on the emerging industry of polymer nanocomposites. While our proposed research will focus on two types of cylindrical nanoparticles, carbon nanotubes and metal nanowires, our findings will be applicable to a broad range of cylindrical nanoparticles. Understanding the polymer dynamics is particularly important when designing fabrication methods for nanocomposites. When a master batch containing a high concentration of nanoparticles is melt mixed with a neat polymer, the rate of polymer diffusion is critical for establishing a homogeneous concentration. For example, one strategy for balancing the high cost of CNTs with their attractive properties involves coating latex particles with CNTs and then sintering the particles to achieve good interfacial strength. The material strength is determined by the interdiffusion of polymers across the interfacial region to form entanglements and the mechanism for this will be enlightened by the proposed research. Further afield, probing the dynamics of elongated nanoparticles can provide insight into the relaxations of stiff biological molecules moving in the crowded intracellular region of living cells.

聚合物纳米复合材料，即分散在聚合物基体中的纳米颗粒的混合物，自从它们在20世纪90年代初被引入以来，已经获得了工业和基础研究的迅速关注。丰田中央研究所（Kojima，1993）提供了第一批高冲击应用之一，其证明添加几体积%的层状硅酸盐极大地改善了尼龙6的机械性能。事实上，具有改进的弹性模量、导电性、阻燃性和导热性的PNC的商业用途可以在包括航空航天、电子和体育应用的许多经济部门中找到。而某些PNC，如聚合物纳米粘土复合材料，似乎正在走向成熟，在系统中的圆柱形纳米粒子，如碳纳米管和金属nanowires的兴趣，是increasing.The本研究的主要目标是提供基本的理解，在圆柱形纳米粒子的存在下，使用协调的实验和理论方法的聚合物动力学。这个提议的材料世界网络包含纳米颗粒合成，纳米复合材料制造，成像，深度分析，流变学，理论和模拟方面的专业知识，以系统地解决长径比从2到500的圆柱形纳米颗粒的存在如何影响聚合物动力学。该MWN团队在聚合物纳米复合材料方面拥有丰富的经验，致力于共同探索这些迷人且具有商业重要性的材料中的聚合物扩散和流变学。拟议中的材料世界网络处于有利地位，可以对聚合物纳米复合材料的物理特性进行突破性的见解，这可能对新兴的聚合物纳米复合材料行业产生积极影响。虽然我们提出的研究将集中在两种类型的圆柱形纳米粒子，碳纳米管和金属纳米线，我们的研究结果将适用于广泛的圆柱形纳米粒子。在设计纳米复合材料的制造方法时，了解聚合物动力学特别重要。当含有高浓度纳米颗粒的母料与纯聚合物熔融混合时，聚合物扩散速率对于建立均匀浓度是关键的。例如，平衡CNT的高成本与其吸引人的性质的一种策略涉及用CNT涂覆胶乳颗粒，然后烧结颗粒以实现良好的界面强度。材料强度是由聚合物在界面区域的相互扩散形成缠结决定的，这一机制将受到拟议研究的启发。在更远的地方，探测细长纳米颗粒的动力学可以提供对在活细胞的拥挤细胞内区域中移动的刚性生物分子的弛豫的洞察。

项目成果

Structure and Conformations of Polymer/SWCNT Nanocomposites

• DOI: 10.1021/ma201359s
• 发表时间: 2011-12-27
• 期刊: MACROMOLECULES
• 影响因子: 5.5
• 作者: Karatrantos, Argyrios;Composto, Russell J.;Clarke, Nigel
• 通讯作者: Clarke, Nigel