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产生了极大的兴趣，随着电动汽车生产和采购的增长，这一问题的重要性也日益增强。聚合物复合材料提供轻量化和零件集成，以及导热和导电管理的机会。在聚合物中添加功能性填料是增强聚合物基体的机械、热和/或电性能等性能的常用方法。填料包括各种颗粒类型（无机或有机填料）、尺寸和几何形状（长径比）以及性能（电、热和机械）增强。引入玻璃和碳纤维主要是为了提高聚合物基体的机械性能，而碳基填料（例如炭黑、石墨纤维、石墨烯）则提高所得聚合物复合材料的导电和导热性能。对于碳基填料，将所选填料分散在基体中也很重要，基体可以是单一聚合物或聚合物共混物。电子、汽车、生物医学、微系统和微机电系统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部件的需求不断增加，以支持需要注射和压缩成型技术的电动汽车中的电池外壳和燃料电池部件等部件。开发电导热元件的主要挑战之一是保持整个部件导热性能的均匀性。有大量文献提供了小实验室规模样本的实验数据和建模。然而，关于流动行为对工业实践中生产的大型部件的填料分布和随后的导电性能的影响，文献中存在显着的差距。整个材料体系的选择、填料在聚合物基体中的混合分散以及成型加工步骤都有助于导电性能的均匀性。此外，人们越来越有兴趣通过虚拟流程链中的模拟捕获整个流程，以便能够设计符合工业 4.0 的产品和流程。该拟议研究计划的长期目标是能够模拟纳米粒子填充聚合物在大长度尺度差异下的导电性能，以有利于加拿大的先进制造业。短期目标是对纳米颗粒分布和随后的电导率特性进行建模和实验验证，并提供 HQP 培训 1) 小规模系统、微注射成型； 2) 中型系统，传统注塑成型；3) 大型系统，压缩成型。