NMR cryoporometry of polymers: Cross-linking, porosity and the importance of probe liquid
| Autor: | Paul D. Topham, George E. Parkes, Taylor Rottreau, Josephine L. Harries, Marta Granollers Mesa, Manuela Schirru, Robert Evans |
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| Rok vydání: | 2019 |
| Předmět: |
Imagination
chemistry.chemical_classification Materials science Chemical substance Morphology (linguistics) media_common.quotation_subject 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Colloid and Surface Chemistry Chemical engineering chemistry 0210 nano-technology Porosity Mesoporous material Science technology and society media_common |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 575:256-263 |
| ISSN: | 0927-7757 1873-4359 |
| DOI: | 10.1016/j.colsurfa.2019.05.018 |
| Popis: | The morphology of cross-linked polymers plays an important role in their physical and chemical properties. NMR cryoporometry allows for the investigation of these structures over different length scales, through appropriate choice of probe liquid. The different structures of two different polymeric samples, one a cross-linked polymer hydrogel, the other a pore-expanded ion-exchange polymer, are analysed here. The ability for NMR cryoporometry to analyse both polymeric materials in the swollen state is successfully demonstrated, as is the importance of probe-liquid choice for the analysis of different regions of the pore structure. In both cases, water is used to identify populations of pores smaller than ca. 5 nm. The use of t-butanol and menthol reveals the presence of additional mesoporous structures in the ion-exchange resin as well as the responsiveness of the pore structure to the liquid used to swell it. |
| Databáze: | OpenAIRE |
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