Molding of Filled Polymer Nanocomposites

填充聚合物纳米复合材料的成型

• 批准号: RGPIN-2022-03516
• 负责人: Hrymak, Andrew
• 金额: $ 2.04万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746694
• 关键词: Molding; Filled; Polymer; Nanocomposites

There has been considerable interest in lightweighting solutions for transportation, which is now growing in importance with the growth in production and acquisition of electric vehicles. Polymer composite materials offer lightweighting and part integration, as well as opportunities for thermal and electrical conductivity management. The addition of functional fillers to polymers is a common method to enhance properties such as the mechanical, thermal, and/or electrical performance of polymer matrices. Fillers include a broad range of particle types (inorganic or organic fillers), size and geometry (aspect ratio) and properties (electrical, thermal, and mechanical) enhancement. Glass and carbon fibers are mainly introduced to improve the mechanical properties of polymer matrices, while carbon-based fillers (e.g., carbon black, graphite fiber, graphene) improve the electrical and thermal conductivity properties of the resulting polymer composites. In the case of carbon-based fillers, it is also important to disperse the chosen fillers in the matrix, which could be a single polymer or polymer blend. There has been increasing demand for polymer based composite components in the areas of electronics, automotive, biomedicals, microsystems, and microelectromechanical systems. There is now increasing demand for electrically and thermally conductive components at larger scales to support components such as battery enclosures and fuel cell components in electrical vehicles requiring injection and compression molding techniques. One of the major challenges in developing electrically-thermally conductive components is to maintain the uniformity of conductivity properties over the entire part. There is a large body of literature with experimental data and modeling done at the small laboratory scale of sample. There is however a significant gap in the literature on the effects of flow behaviour on the filler distribution and subsequent conductivity properties for large components that would be produced in industrial practice. The entire chain of material system selection, mixing-dispersion of the filler in the polymer matrix and the molding processing step all contribute to the uniformity of conductivity properties. In addition, there is increasing interest in capturing the full process through simulation in a virtual process chain to be able to design products and processes in line with Industry 4.0. The long-term objective of this proposed research program is to be able to simulate the conductivity properties of nanoparticle filled polymers over large length scale differences to benefit advanced manufacturing in Canada. The short term objectives are to model and experimentally validate the nanoparticle distribution and subsequent conductivity properties, and provide HQP training 1) in small-scale systems, microinjection molding; 2) intermediate scale systems, conventional injection molding and 3) large scale systems, compression molding.

人们对交通运输的轻量化解决方案有相当大的兴趣，随着电动汽车生产和采购的增长，这一问题的重要性现在越来越大。聚合物复合材料提供了轻量化和部件集成，以及导热和导电性管理的机会。向聚合物中添加功能填料是提高聚合物基质的机械、热和/或电性能等性能的常用方法。填料包括广泛的颗粒类型(无机或有机填料)、尺寸和几何形状(纵横比)以及性能(电、热和机械)增强。玻璃纤维和碳纤维的引入主要是为了改善聚合物基质的力学性能，而碳基填料(如炭黑、石墨纤维、石墨烯)则改善了所得到的聚合物复合材料的导电性和导热性。对于碳基填料，将选定的填料分散在基质中也很重要，基质可以是单一聚合物或聚合物混合物。在电子、汽车、生物医学、微系统和微电子机械系统等领域，对聚合物基复合材料部件的需求不断增加。现在对更大规模的导电和导热组件的需求越来越大，以支持需要注射和压缩成型技术的电动汽车中的组件，如电池外壳和燃料电池组件。开发电热传导元件的主要挑战之一是保持整个部件的导电性的一致性。有大量的文献是在小规模的实验室样本上进行的实验数据和建模。然而，对于在工业实践中可能产生的大部件的填料分布和随后的导电性，关于流动行为对其影响的文献中有一个很大的空白。材料体系选择的整个链条、填料在聚合物基质中的混合分散以及成型加工步骤都有助于实现导电性的一致性。此外，人们越来越有兴趣通过在虚拟过程链中进行模拟来捕获完整的过程，以便能够设计符合行业4.0的产品和过程。这项拟议研究计划的长期目标是能够模拟纳米颗粒填充聚合物在大长度尺度上的导电性，从而为加拿大的先进制造提供帮助。短期目标是对纳米颗粒分布和随后的导电性进行建模和实验验证，并提供HQP培训：1)小型系统，微注射成型；2)中等规模系统，常规注射成型；3)大型系统，压缩成型。