Effect of Reinforcement at Length Scale for Polyurethane Cellular Scaffolds by Supramolecular Assemblies
| Autor: | Ruma Bhattacharyya, Shriram Janghela, Namburi Eswara Prasad, Kingsuk Mukhopadhyay, Debmalya Roy, Amit Saraiya |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Capillary action Supercritical drying Supramolecular chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Stress (mechanics) chemistry.chemical_compound Thermoplastic polyurethane chemistry Chemical engineering Materials Chemistry Physical and Theoretical Chemistry 0210 nano-technology Porosity Polyurethane Shrinkage |
| Zdroj: | The journal of physical chemistry. B. 122(9) |
| ISSN: | 1520-5207 |
| Popis: | This study is aimed to represent the role of carbonaceous nanofillers to reinforce the commercially available polyurethane porous structure. The effect of dimensionality of fillers to anchor the construction of stable three-dimensional (3D) cellular architectures has been highlighted. The cellular frameworks of commercially available thermoplastic polyurethane (TPU) have been fabricated through the thermoreversible supramolecular self-assembly route. It was established that the minimum shrinkage of TPU lattice structures occurred when the solid-state network is strengthened by the topologically engineered 3D hierarchical nanofillers, where the amount of reinforcement was found to play a critical role. It has been established by series of structure-property correlations that reinforcing the cellular structure to endure the capillary stress is equally effective as supercritical drying for producing low-density porous morphologies. The removal of liquid phase from gel is as important as the presence of 3D fillers in the matrix for reinforcing the cellular structures when replacing the solvent phase with air to generate a two-phase solid-gas engineered morphology. The insight into the polyurethane network structure revealed that the dimensionality, amount, and distribution of fillers in the matrix are critical for reinforcing the cellular scaffolds in solid gel without any cross-linking. |
| Databáze: | OpenAIRE |
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