Putting interfaces at work

让接口发挥作用

• 批准号: RGPIN-2020-06326
• 负责人: Fradette, Louis
• 金额: $ 2.4万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=740748
• 关键词: Putting; interfaces; work

Full recycling of all the materials, waste waters, and gaseous emissions is an irreversible trend. New processing technologies are required to succeed. The existing processing techniques have reached their limit or simply the processes required do not exist yet. New, high-performance materials will be at the core of the transformation, allowing for extra light structures to be produced, making use of much less materials than what is currently used to provide similar and even superior properties. The proposed program aims at using interfaces (Liquid-Liquid and Gas-liquid) in combination with their affinity with particles having specific surface properties to develop high-selectivity recycling technologies or build high-performance materials with extreme porosity that will minimize the quantify of resources required. The applicant is an expert in the processing of solid-stabilized emulsions (AKA SSEs or Pickering emulsions) and foams. SSE are produced when fine particles (micron- to nano-sized) attach at an interface. The surface chemistry of the particles, combined to the water and the oil chemistry, is crucial for the final result to be a SSE. When conventionally preparing SSEs, it is possible to select all the chemical conditions of each constituent (water, oil and particles) so that an emulsion is produced. So far, SSEs have been produced to be used as is in the cosmetic, pharmaceutical, chemical, and oil refining industries. Two main types of emulsions can be prepared i.e. low and high concentrations where the frontier between the two sits at the maximum packing fraction of identical spheres, around 65% of dispersed phase. Below this value, we name the emulsions SSEs while above, we use HIPE-SSEs for High Internal Phase Emulsions SSEs. The same can be said of foams were gas a liquid are used instead of two liquids. The two main ideas that triggered this program is first that low dispersed content SSEs could be used to harvest particles of interest in separation processes and second that HIPE SSEs could provide templates to build highly porous materials. In both cases, the approach is to investigate the processing required for the potential applications and eventually determine the real potential for such applications at large scale. When the oil content is kept below 40% in volume, SSEs offer the potential to selectively separate ground/crushed materials (raw ore, recycled plastics or biomaterials, glass, .) by controlling the chemistry of the oil and the water phases to make them attractive to the particles targeted. At high oil volume content (HIPE-SSE), the drops are in contact with their neighbours and the interface between the drops offers a continuous structure of particles. Subsequent processing of these emulsions may transform the particles structure into a solid material, after removal of the oil and the water phases with the resulting solid being highly porous.

所有材料，废水和气态排放的全部回收是不可逆转的趋势。需要新的处理技术才能成功。现有的处理技术已达到其极限，或者仅仅存在所需的过程。新的，高性能的材料将是转换的核心，从而可以产生额外的光结构，从而使用材料要少于目前提供的相似性能甚至出色的特性的材料。 所提出的程序旨在使用界面（液体液体和气体液体）与具有特定表面特性的粒子结合使用，以开发高选择性回收技术或建立具有极高孔隙率的高性能材料，从而最大程度地减少了所需资源的量化。申请人是处理固体乳液（又称SSES或Pickering乳液）和泡沫的专家。当细颗粒（微米至纳米大小）附着在界面时，会产生SSE。颗粒的表面化学与水和油化学的结合对于最终结果至关重要。当常规准备SSE时，可以选择每个组成部分（水，油和颗粒）的所有化学条件，从而产生乳液。到目前为止，已经生产了SSE，可以按照化妆品，药​​品，化学和炼油行业的使用。可以制备两种主要类型的乳液类型，即两者之间的边缘位于相同球的最大堆积比例，约占分散相的65％。低于此值，我们将乳液SSE命名为上述时，我们将Hipe-SS用于高内相乳液SSE。可以说泡沫是气体，而不是两种液体。触发该程序的两个主要想法首先是，低分散的内容SSE可用于在分离过程中收获感兴趣的颗粒，其次，Hipe SSES可以提供​​模板来构建高度多孔的材料。在这两种情况下，方法是调查潜在应用所需的处理，并最终确定大规模应用程序的实际潜力。 当油含量保持在40％以下时，SSE提供了通过控制石油和水相的化学性能使它们对目标的颗粒有吸引力的化学方法，从而有可能将其分离性地分离地面/碎材料（原矿石，再生塑料或生物材料，玻璃）。在高油容积含量（HIPE-SSE）下，滴水与邻居接触，滴水之间的界面提供了颗粒的连续结构。这些乳液的随后加工可能会在去除油和水相后，将颗粒结构转化为固体材料，导致固体高度多孔。