Nitrogen rich hyperbranched polyurethane-carbon nanohorn composite: Implications on the development of multifunctional coatings
| Autor: | Kothapalli V S N Raju, Ramanuj Narayan, Rohit Ranganathan Gaddam, Srinivasarao Pilla |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Sebacic acid Composite number 02 engineering and technology engineering.material 010402 general chemistry Branching (polymer chemistry) 01 natural sciences chemistry.chemical_compound Coating Materials Chemistry medicine Organic chemistry Composite material Polyurethane General Chemistry Dynamic mechanical analysis 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Triethanolamine Ceramics and Composites engineering Pyrene 0210 nano-technology medicine.drug |
| Zdroj: | Polymer Composites. 39:E772-E779 |
| ISSN: | 0272-8397 |
| Popis: | In the present report, we demonstrate the advantages associated with a multifaceted coating comprising of single-walled carbon nanohorns (SWNH) and hyperbranched polyurethane (HBPU). To synthesize the HBPU, we utilized sebacic acid and triethanolamine as starting materials employing traditional polycondensation reaction; A + B approach. The degree of branching as estimated from NMR was found to be ∼60%, indicating a good branching profile. Prepared nitrogen rich HBPU coatings exhibited good corrosion resistance and adhesion to the substrate. Furthermore, an in situ blend of pyrene and functionalized carbon nanohorns (f-SWNH) were introduced within the HBPU matrix to impart additional properties. The obtained HBPU-SWNH composites (CNH-PU) exhibited superior storage modulus (∼1081 MPa), lower corrosion rate (6.16 × 10 mm/year), excellent flexibility, and exceptional thermo-mechanical properties along with fluorescence (due to pyrene moiety). The properties displayed by the composite coatings were much higher as compared to the HBPU in the absence of synergism. |
| Databáze: | OpenAIRE |
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