Sustainable Nanomaterials for Advanced Engineering Applications

用于高级工程应用的可持续纳米材料

• 批准号: RGPIN-2017-04236
• 负责人: Tam, Michael
• 金额: $ 5.39万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=709696
• 关键词: Sustainable; Nanomaterials; Advanced; Engineering; Applications

Canada's reliance on its natural resource has, in many ways, directed the country's research and development, and two important trends are emerging. Firstly, renewable natural resources from forest products and agricultural biomass can be exploited and used as high valued-added raw materials for biomedical, personal care and electronic applications. Secondly, the utilization of forest products, such as cellulose nanocrystals (CNCs) can aid in the reduction of greenhouse gases including carbon dioxide. Through photosynthesis, plants extract CO2 and combine with water to produce cellulose, from which CNC is extracted through an acid hydrolysis process. From this renewable resource, we will exploit the use of functionalized CNC as high value-added raw materials. The proposal focuses on the synthesis of functionalized CNCs (CNC-Hybrids) in green solvents, which eliminates the tedious and complicated purification of products after synthesis. The surface charges, composition of functional groups on CNC surfaces, and morphology of the nanoparticles will be quantified. We will conduct fundamental studies to elucidate the forces that control the interactions between CNC-Hybrids and additives, such as metal ions, organic molecules, amphiphilic compounds etc. Detailed physical understanding of the physics and molecular interactions will be advanced, and correlated to bulk properties (e.g. rheology, colloidal stability, conductivity etc). These principles will be evaluated and applied to several advanced engineering applications, namely: 1. Pickering emulsions - We anticipate that many of the future products will utilize benign nanoparticles to stabilize oil/water emulsions. We will graft pH and temperature responsive brushes onto CNC, and the impact of these stimuli, brush length and density will be examined. 2. Anti-microbial agents - The US Food and Drug Administration (FDA) recently announced a ban on 19 antibacterial chemical agents. As part of this program, we will design and develop sustainable anti-microbial agents that can effectively replace these banned compounds. 3. Conductive inks - Future electronics will be flexible and conductive inks will be printed on a flexible polymeric substrate. We will develop conductive inks by functionalizing CNC with conductive polymer/metallic nanoparticles that permit us to tune the conductivity. The performance of these conductive inks will be evaluated in a model electronic device. The fundamental knowledge generated from this program will advance the design and development of sustainable nanomaterials for various advanced engineering applications. Through this program, value innovation will be created resulting in the creation of highly skilled jobs for Canadians. HQP trained with skills on the modification and formulation of CNC-Hybrids will be able to support this new industry and contribute to the economy.

加拿大对其自然资源的依赖在许多方面指导了该国的研究和发展，目前正在出现两个重要趋势。首先，来自森林产品和农业生物质的可再生自然资源可被开发和用作生物医学、个人护理和电子应用的高附加值原材料。其次，利用森林产品，如纤维素纳米晶体（CNC），可以帮助减少包括二氧化碳在内的温室气体。 通过光合作用，植物提取CO2并与水联合收割机结合产生纤维素，通过酸水解过程从中提取CNC。从这种可再生资源中，我们将开发功能化CNC作为高附加值原材料的用途。该方案的重点是在绿色溶剂中合成功能化的CNCs（CNC-Hybrids），从而消除了合成后产物的繁琐和复杂的纯化。将量化纳米颗粒的表面电荷、CNC表面上官能团的组成和形态。我们将进行基础研究，以阐明控制CNC-混合物和添加剂之间相互作用的力，如金属离子，有机分子，两亲化合物等。将推进对物理和分子相互作用的详细物理理解，并与本体性质（例如流变学，胶体稳定性，导电性等）相关。这些原则将被评估并应用于几个先进的工程应用，即： 1.皮克林乳液-我们预计未来的许多产品将利用良性纳米颗粒来稳定油/水乳液。我们将嫁接pH和温度响应刷CNC，这些刺激的影响，刷的长度和密度将被检查。 2.抗微生物剂-美国食品和药物管理局（FDA）最近宣布禁止19种抗菌化学剂。作为该计划的一部分，我们将设计和开发可持续的抗菌剂，可以有效地取代这些禁用的化合物。 3.导电油墨-未来的电子产品将是柔性的，导电油墨将印刷在柔性聚合物基板上。我们将通过使用导电聚合物/金属纳米颗粒使CNC功能化来开发导电油墨，从而使我们能够调整导电性。这些导电油墨的性能将在模型电子器件中进行评估。 该计划产生的基础知识将推动可持续纳米材料的设计和开发，用于各种先进的工程应用。通过该计划，将创造价值创新，从而为加拿大人创造高技能工作。HQP在CNC混合动力车的修改和配方方面接受过培训，将能够支持这一新行业并为经济做出贡献。