Polymer-Based Capsules of Active Liquids Templated by Non-Aqueous Emulsions

非水乳液模板活性液体聚合物胶囊

• 批准号: 2103182
• 负责人: Emily Pentzer
• 金额: $ 41.77万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2103182&HistoricalAwards=false
• 关键词: Polymer; Based; Capsules; Active; Liquids

NON-TECHNICAL SUMMARY:Scientists and engineers continue to develop new materials with improved performance in applications such as batteries, water purification, gas uptake, and so on. These novel materials provide the foundation used to create new technologies that impact and improve nearly every facet of modern life. Unfortunately, some of the new materials, such as ionic liquids and eutectic solvents, are difficult to handle by themselves, and they require containment of some kind, limiting their use in practical systems. This research work addresses these current limitations by developing methods to prepare capsules with cores of the specialized liquid wrapped in polymer shells. This approach is made possible by the use of a water-free emulsion that is composed of droplets of the active liquid dispersed in an oil, coupled with polymerization techniques. The water-free emulsions are critical to the development of this encapsulation system, as they allow the specialized liquid to remain pure and unadulterated. The work addresses how the composition of the polymer shell impacts performance properties of the capsules, namely mechanical properties and the uptake of gaseous carbon dioxide. This research promotes progress in the areas of composite materials with applications in critical areas such as energy storage and gas separations. In addition to the research, this project will support the training of undergraduate and graduate students and development of How-To Videos. These videos are planned to be publicly available and to show new researchers how to use scientific instruments to characterize polymer-based materials, thereby supporting the development and training of scientists and engineers more broadly. TECHNICAL SUMMARY:The goal of the planned research is to develop methods to prepare capsules with cores of active liquids (e.g., ionic liquids and deep eutectic solvents) and polymer composite shells of varied permeability, stability, and mechanical properties. This will be accomplished by leveraging interfacial polymerizations in non-aqueous emulsions. Alkylated graphene oxide (GO) nanosheets will be used as particle surfactant to stabilizing Pickering emulsions, toluene or octane will be used as the continuous phase, and ionic liquid or deep eutectic solvent as the discontinuous phase. Aim 1 focuses on preparing capsule shells of varied permeability and mechanical properties using telechelic oligomers as monomers, as prepared by ring opening metathesis polymerization (ROMP), reversible-addition fragmentation-chain transfer (RAFT) polymerization, and radical dead-end polymerization (DEP). In Aim 2, the stability of the capsule shell will be tuned by incorporation of dynamic covalent bonds; this will enable destruction or fusion of the capsule shells. In Aim 3, the capsule shell thickness will be minimized and the core fluid purity maximized by using reactive particle surfactants and thiol-ene chemistry. The capsule composition, morphology, thermal properties, permeability, and mechanical properties will be established. An unfunded collaboration with Prof. Burcu Gurkan will reveal the relationship between shell composition and permeability to gaseous CO2. An unfunded collaboration with Prof. George Pharr will support evaluation of individual capsules using micromanipulation techniques, producing force-displacement profiles. The scientific research is complemented by support of undergraduate and graduate researchers, as well as How-To Videos (HTVs) which demonstrate working principles and practical considerations for techniques used to characterize soft matter..This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术摘要：科学家和工程师继续开发新材料，在电池，水净化，燃气吸收等应用中的性能提高。这些新颖的材料为创建新技术提供了基础，这些技术几乎可以影响现代生活的各个方面。不幸的是，某些新材料（例如离子液体和共晶溶剂）很难自己处理，并且需要某种限制，从而限制了它们在实际系统中的使用。这项研究工作通过开发用包裹在聚合物壳中的专门液体的核心制备胶囊来解决这些当前局限性。通过使用无水乳液，该乳液由分散在油中的活性液体的液滴组成，并加上聚合技术。无水乳液对于这种封装系统的开发至关重要，因为它们允许专门的液体保持纯净且不受限制。该工作介绍了聚合物壳的组成如何影响胶囊的性能特性，即机械性能和气态二氧化碳的摄取。这项研究促进了复合材料领域的进步，并在关键区域（例如储能和气体分离）中进行了应用。除研究外，该项目还将支持对本科生和研究生的培训以及如何开发操作视频。这些视频计划公开可用，并向新研究人员展示如何使用科学仪器来表征基于聚合物的材料，从而更广泛地支持科学家和工程师的开发和培训。技术摘要：计划研究的目的是开发使用活性液体（例如，离子液体和深层共晶溶剂）和聚合物复合壳的胶囊制备的方法，具有多种渗透性，稳定性和机械性能。这将通过利用非水乳液中的界面聚合来实现。烷基化石墨烯（GO）纳米片将用作颗粒表面活性剂，以稳定皮克乳液，甲苯或辛烷值将用作连续相，离子液体或深层溶剂溶剂作为不连续相。 AIM 1专注于准备使用远程技术低聚物作为单体的不同渗透性和机械性能的胶囊壳，该胶囊是通过环打开元音聚合（ROMP），可逆的 - 增强碎片链传递（RAFT）聚合（RAFT）聚合和自由度的死端聚合（DEP）（DEP）（DEP）。在AIM 2中，胶囊壳的稳定性将通过掺入动态共价键来调节；这将使胶囊壳的破坏或融合。在AIM 3中，胶囊壳的厚度将最小化，并通过使用反应性颗粒表面活性剂和硫醇 - 烯化学来最大程度地提高核心流体纯度。将建立胶囊组成，形态，热性能，渗透性和机械性能。与Burcu Gurkan教授的无资金合作将揭示壳体成分与气体CO2的渗透性之间的关系。 与乔治·帕尔（George Pharr）教授的无资金合作将使用微观渗透技术来支持对单个胶囊的评估，从而产生力解散曲线。科学研究得到了对本科和研究生研究人员的支持，以及如何进行操作视频（HTV），这些视频（HTV）展示了用于特征软件的技术的工作原理和实际考虑。.该奖项反映了NSF的法定任务，并通过基金会的知识分子优点和广泛的影响来评估NSF的法定任务，并被认为是值得的支持。

项目成果

Impact of Shell Composition on Dye Uptake by Capsules of Ionic Liquid

壳成分对离子液体胶囊吸收染料的影响

• DOI: 10.1021/acs.langmuir.2c02015
• 发表时间: 2022
• 期刊: Langmuir
• 影响因子: 3.9
• 作者: Edgehouse, Katelynn;Starvaggi, Nicholas;Rosenfeld, Neil;Bergbreiter, David;Pentzer, Emily
• 通讯作者: Pentzer, Emily

Temperature-Dependent Capsule Shell Bonding and Destruction Based on Hindered Poly(urea-urethane) Chemistry

• DOI: 10.1021/acs.chemmater.2c00415
• 发表时间: 2022-06-28
• 期刊: CHEMISTRY OF MATERIALS
• 影响因子: 8.6
• 作者: Wang, Yifei;Wei, Peiran;Pentzer, Emily
• 通讯作者: Pentzer, Emily

Viscoelastic and thixotropic characterization of paraffin/photopolymer composites for extrusion-based printing

• DOI: 10.1063/5.0104157
• 发表时间: 2022-09-01
• 期刊: PHYSICS OF FLUIDS
• 影响因子: 4.6
• 作者: Cipriani, Ciera E.;Shu, Yalan;Benjamin, Chandler C.
• 通讯作者: Benjamin, Chandler C.

3D Printed CO 2 ‐Based Triblock Copolymers and Post‐Printing Modification

3D 打印 CO 2 — 基于三嵌段共聚物和打印后改性

• DOI: 10.1002/anie.202208355
• 发表时间: 2022
• 期刊: Angewandte Chemie International Edition
• 作者: Wei, Peiran;Bhat, Gulzar A.;Cipriani, Ciera E.;Mohammad, Hamza;Schoonover, Krista;Pentzer, Emily B.;Darensbourg, Donald J.
• 通讯作者: Darensbourg, Donald J.

Additive manufacturing: modular platform for 3D printing fluid-containing monoliths

• DOI: 10.1039/d2me00102k
• 发表时间: 2022
• 期刊: Molecular Systems Design & Engineering
• 作者: C. Cipriani;Nicholas C Starvaggi;Katelynn J. Edgehouse;Jordan B. Price;Stephanie L. Vivod;Emily B. Pentzer