Carbon Dioxide Stimuli Responsive Polymer Colloids

二氧化碳刺激响应聚合物胶体

• 批准号: RGPIN-2015-05543
• 负责人: Cunningham, Michael
• 金额: $ 4.15万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=648415
• 关键词: Carbon; Dioxide; Stimuli; Responsive; Polymer

The next generation of advanced materials will be capable of responding to variation in their environment by undergoing changes in their chemical or physical properties. The stimulus to which the materials react is known as a "trigger", and such materials are commonly know as "stimuli-responsive" materials. The proposed research program will examine a new class of polymer nanoparticles. These are very small particles (~100 nm in diameter, or 1000x smaller than the thickness of a human hair) that find application in a wide range of products, many of significant economic importance to Canada, including for example coatings, sealants, adhesives, personal/health care products and cosmetics. We will develop new methods for making these nanoparticles stimuli-responsive, so that the particles will undergo a desirable or beneficial change in their properties upon exposure to a trigger that will make them more useful or valuable for a given application. Well-known examples of stimuli-responsive materials include windows that darken upon exposure to bright light. Our research group recently introduced polymer nanoparticles that can undergo a dramatic change in properties upon exposure to simple, benign triggers; carbon dioxide or air. In contrast, other existing stimuli-responsive polymer particles require toxic chemicals such as strong acids or bases to switch. We only need to bubble carbon dioxide or air into a water-based suspension of our particles to switch their surface properties, so that the particles exist either as a uniform dispersion (under carbon dioxide) or as an aggregated powder (under air). This is achieved because the particle surface electrical charge can be "switched". We will develop processes for making three different types of carbon dioxide responsive nanoparticles. One type will use established chemistry commonly used in existing products, the second type will use a novel chemistry suitable for advanced, high valued-added applications, while the third type will employ a novel, switchable renewable nanomaterial derived from cellulose (a critical resource for Canada), known as CNC (crystalline nanocellulose). Students conducting the research will develop a broad understanding of both stimuli-responsive materials and polymer nanoparticles, preparing them for making important contributions to Canada's future economic development in key industrial sectors.**

下一代高级材料将能够通过发生化学或物理性能的变化来应对其环境的变化。材料反应的刺激被称为“触发”，这种材料通常被称为“刺激性反应性”材料。拟议的研究计划将检查一类新的聚合物纳米颗粒。这些是非常小的颗粒（直径约100 nm，比人毛的厚度小1000倍），它们在各种产品中都有应用，对加拿大的许多重要经济重要性，例如涂料，密封剂，胶粘剂，胶粘剂，个人/医疗保健产品和化妆品。我们将开发新的方法来使这些纳米颗粒刺激响应性，以便粒子在暴露于触发器时会在其性质中发生理想或有益的变化，这将使它们在给定应用中更有用或有价值。刺激响应材料的众所周知的例子包括窗户在暴露于明亮的光线时会变黑。我们的研究小组最近引入了聚合物纳米颗粒，这些纳米颗粒会在暴露于简单的良性触发器时会发生巨大变化。二氧化碳或空气。相反，其他现有的刺激响应性聚合物颗粒需要有毒化学物质，例如强酸或碱进行切换。我们只需要将二氧化碳或空气泡入颗粒的水基悬浮液即可切换其表面特性，以便将颗粒作为均匀的分散体（在二氧化碳下）或聚集粉（在空气下）存在。这是因为可以“切换”粒子表面电荷。我们将开发制造三种不同类型的二氧化碳响应纳米颗粒的过程。一种类型将使用在现有产品中常用的既定化学性质，第二种将使用适用于高级，高价值应用的新型化学反应，而第三种类型的化学性质将采用纤维素衍生的新颖，可切换的可再生可再生纳米材料（用于的关键资源（一种至关重要的资源）加拿大），称为CNC（结晶纳米纤维素）。进行研究的学生将对刺激反应材料和聚合物纳米颗粒的广泛理解，为他们做好准备为加拿大关键工业领域的未来经济发展做出重要贡献。**