{"project":{"acronym":"","projectId":91558,"title":"Nanoporous Cyclic Brush Polymers for Selective Carbon Dioxide Capture","primaryTaxonomyNodes":[{"taxonomyNodeId":10856,"taxonomyRootId":8816,"parentNodeId":10855,"level":3,"code":"TX12.1.1","title":"Lightweight Structural Materials","definition":"Lightweight structural materials reduce the mass and increase the efficiency of structures and structure components including advanced metallics, nanomaterials, polymers, matrix composites, multifunctional materials, damage detecting/damage tolerant materials, and self-repairing/self-healing materials.","exampleTechnologies":"Nanofibers, fibers, resins and adhesives that enable the tailoring of large monolithic structures; materials that perform multiple functions, materials that include mechanisms for fast, in-situ repairs; topology optimized structures; architectured foams; novel low density metal; composite alloys","hasChildren":false,"hasInteriorContent":true}],"startTrl":2,"currentTrl":3,"endTrl":3,"benefits":"The expected significance of this work is the increase in porosity and uptake capacity in azo-linked porous organic polymers (ALP) for carbon dioxide capture as well as increased thermal stability of these materials by the incorporation of a cyclic backbone. It is expected that the work will afford a simple, scalable synthesis of a cyclic brush polymer system with highly tunable porosity and surface morphology that can be utilized for selective capture of carbon dioxide. The project is also expected to yield a better fundamental understanding of the physicochemical behaviors and functionalization potential of these systems with regard to their applications in space technology as lightweight, nanoporous materials.","description":"The objective of the proposed work is to develop advanced synthetic methodologies that afford nanoporous materials with selective uptake affinity towards carbon dioxide and large gas storage capacities. The expected significance of this work is the increase in porosity and uptake capacity in azo-linked porous organic polymers (ALP) for carbon dioxide capture as well as increased thermal stability of these materials by the incorporation of a cyclic backbone. Cyclic polymers show remarkably different behaviors than their linear counterparts, and are expected to provide a highly tunable system for removing impurities such as carbon dioxide from breathing air aboard space vessels. The tunability will be further enhanced by the construction of ALP-based molecular brush polymers, which behave significantly differently from linear polymer analogs, and will allow for pre-established molecular design parameterization facilitated by the covalent connectivity combined with solution- and solid-state assembly processes. Cyclic brush polymers will be achieved by ring-expansion metathesis polymerization (REMP), and a significant effort will be directed towards modifications of the catalyst and reaction conditions to improve control of this polymerization. Highly dense networks of azo-linkages, recently shown to be efficacious for selective carbon dioxide uptake, will be achieved by \u001Cgrafting from\u001D techniques. A library of cyclic brushes with varying backbone length, azo-linkage compositional fraction, and azo-linkage branch points will be prepared and tested to experimentally obtain carbon dioxide uptake capacity and selectivity. The preparation and subsequent testing of these materials will involve a wide array of synthetic and characterization techniques. For polymers soluble in organic solvents, solution-state NMR spectroscopy will be used to obtain their compositions and number-average molecular weight values; size exclusion chromatography (SEC) will be used to obtain their molecular weights and molecular weight distributions. Differential scanning calorimetry (DSC) and thermogravimetric analysis will probe the glass and melting transition temperatures and the thermal stability, respectively. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) will be used to image the surface characteristics of these materials. The porosity, carbon dioxide uptake capacity, and carbon dioxide selectivity will be determined experimentally with physisorption analysis. It is expected that the proposed work will afford a simple, scalable synthesis of a cyclic brush polymer system with highly tunable porosity and surface morphology that can be utilized for selective capture of carbon dioxide. The proposed project is also expected to yield a better fundamental understanding of the physicochemical behaviors and functionalization potential of these systems with regard to their applications in space technology as lightweight, nanoporous materials.","startYear":2015,"startMonth":8,"endYear":2019,"endMonth":7,"statusDescription":"Completed","principalInvestigators":[{"contactId":260178,"canUserEdit":false,"firstName":"Karen","lastName":"Wooley","fullName":"Karen Wooley","fullNameInverted":"Wooley, Karen","publicEmail":false,"nacontact":false}],"programDirectors":[{"contactId":84634,"canUserEdit":false,"firstName":"Claudia","lastName":"Meyer","fullName":"Claudia M Meyer","fullNameInverted":"Meyer, Claudia M","middleInitial":"M","primaryEmail":"claudia.m.meyer@nasa.gov","publicEmail":true,"nacontact":false}],"programExecutives":[{"contactId":84634,"canUserEdit":false,"firstName":"Claudia","lastName":"Meyer","fullName":"Claudia M Meyer","fullNameInverted":"Meyer, Claudia M","middleInitial":"M","primaryEmail":"claudia.m.meyer@nasa.gov","publicEmail":true,"nacontact":false}],"programManagers":[{"contactId":183514,"canUserEdit":false,"firstName":"Hung","lastName":"Nguyen","fullName":"Hung D Nguyen","fullNameInverted":"Nguyen, Hung D","middleInitial":"D","primaryEmail":"hung.d.nguyen@nasa.gov","publicEmail":true,"nacontact":false}],"projectManagers":[{"contactId":467722,"canUserEdit":false,"firstName":"Tiffany","lastName":"Williams","fullName":"Tiffany S Williams","fullNameInverted":"Williams, Tiffany S","middleInitial":"S","primaryEmail":"tiffany.s.williams@nasa.gov","publicEmail":true,"nacontact":false}],"coInvestigators":[{"contactId":143185,"canUserEdit":false,"firstName":"Eric","lastName":"Leonhardt","fullName":"Eric Leonhardt","fullNameInverted":"Leonhardt, Eric","primaryEmail":"eric.leonhardt@chem.tamu.edu","publicEmail":false,"nacontact":false}],"website":"https://www.nasa.gov/strg#.VQb6T0jJzyE","libraryItems":[],"transitions":[{"transitionId":75836,"projectId":91558,"transitionDate":"2019-07-01","path":"Closed Out","details":"This project details the development of advanced, functional cyclodextrin-derived materials for diverse applications, spanning porous materials for water reclamation and air revitalization to bioabsorbable scaffolds for wound dressings. We demonstrated the efficacy of cyclodextrin-based polyimides (CDPI) in membrane-based separation technologies (Chem. Mater. 2018, 30, 6226), which are of interest to NASA for use in their Next Generation Life Support Systems due to greater wastewater reclamation, low energy consumption, and decreased reliance on consumables that would enable their use for longer-range missions. We further demonstrated that through modified synthetic design of these scaffolds that cyclodextrin could be incorporated into polyester (CDPE) gels, which showed impressive performance as bioabsorbable carriers for a polymeric hemostatic agent (Nat. Commun. 2019, 2307). The establishment of these synthetic techniques are expected to provide a framework for the production of diverse cyclodextrin-based materials with tailored properties and activities.","infoText":"Closed out","infoTextExtra":"","dateText":"July 2019"}],"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"program":{"acronym":"STRG","active":true,"description":"
\tThe Space Technology Research Grants Program will accelerate the development of "push" technologies to support the future space science and exploration needs of NASA, other government agencies and the commercial space sector. Innovative efforts with high risk and high payoff will be encouraged. The program is composed of two competitively awarded components.
","programId":69,"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"responsibleMdId":4875,"stockImageFileId":36658,"title":"Space Technology Research Grants"},"leadOrganization":{"acronym":"Texas A&M","canUserEdit":false,"city":"College Station","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":true,"linkCount":0,"organizationId":3185,"organizationName":"Texas A & M University-College Station","organizationType":"Academia","stateTerritory":{"abbreviation":"TX","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Texas","stateTerritoryId":29},"stateTerritoryId":29,"msiData":{"2017":["Hispanic Serving Institutions (HSI)"],"2023":["Hispanic Serving Institutions (HSI)"]},"setAsideData":[],"murepUnitId":228723,"naorganization":false,"organizationTypePretty":"Academia"},"supportingOrganizations":[{"acronym":"GRC","canUserEdit":false,"city":"Cleveland","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":false,"linkCount":0,"organizationId":4860,"organizationName":"Glenn Research Center","organizationType":"NASA_Center","stateTerritory":{"abbreviation":"OH","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Ohio","stateTerritoryId":23},"stateTerritoryId":23,"naorganization":false,"organizationTypePretty":"NASA Center"}],"statesWithWork":[{"abbreviation":"TX","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Texas","stateTerritoryId":29}],"lastUpdated":"2024-2-6","releaseStatusString":"Released","viewCount":547,"endDateString":"Jul 2019","startDateString":"Aug 2015"}}