Functional surface coatings from tailor-made long-chain hydroxypropyl cellulose ester nanoparticles
| Autor: | David Seelinger, Maximilian Nau, Markus Biesalski |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Hydroxypropyl cellulose Fatty acid Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Chemical kinetics chemistry.chemical_compound chemistry Chemical engineering Pyridine Melting point Stearic acid 0210 nano-technology Glass transition |
| Zdroj: | Cellulose. 25:5769-5780 |
| ISSN: | 1572-882X 0969-0239 |
| DOI: | 10.1007/s10570-018-1981-2 |
| Popis: | Hydroxypropyl cellulose (HPC)-esters were prepared by a homogeneous reaction of HPC with fatty acid chlorides. The effects of different solvent systems and reaction additives were evaluated, and plain, dried THF was established as best system in terms of toxicity, targeted synthesis of desired degree of substitution (DS), chain degradation and ease of workup. Moreover, pyridine/4-dimethylaminopyridine (4-DMAP) was found to be the fastest system overall. The reaction kinetics with different fatty acids—lauric, myristic, palmitic and stearic acid—were characterized and comprehensively compared. The DS could be adjusted precisely, giving control over the glass transition temperature (Tg)/melting point (Tm) of the HPC-esters, yielding a toolbox to tailor HPC-ester. In a next step, nanoparticles are formed from HPC stearic acid ester and used to generate superhydrophobic surface coatings, thereby demonstrating one of the interesting potential uses of this sustainable material. |
| Databáze: | OpenAIRE |
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