Correlation of mechanical and hydration properties of soft phytoglycogen nanoparticles
| Autor: | Michael Grossutti, John Dutcher |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Nanoparticle 02 engineering and technology 010402 general chemistry Zea mays 01 natural sciences chemistry.chemical_compound Osmotic Pressure Ellipsometry Elastic Modulus Materials Chemistry Osmotic pressure Mechanical Phenomena Range (particle radiation) Bulk modulus Phytoglycogen Organic Chemistry Water Dextrans 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering chemistry Nanoparticles Particle Gravimetric analysis 0210 nano-technology Dialysis Glycogen |
| Zdroj: | Carbohydrate Polymers. 251:116980 |
| ISSN: | 0144-8617 |
| Popis: | Phytoglycogen nanoparticles are highly branched polymers of anhydroglucose units (AGUs) produced as soft, compact nanoparticles by sweet corn. By combining results of dialysis, ellipsometry and gravimetric analysis experiments, we constructed a master plot of the osmotic pressure Π -concentration C data for phytoglycogen nanoparticles that spans the complete range ∼ 0% w/w C ∼ 100 % w/w. The distinctive shape of the Π C curve for phytoglycogen differs significantly from that of dextran, a lightly branched polysaccharide also made up of AGUs but not in the form of particles, especially near concentrations corresponding to contact between the nanoparticles. By calculating the dependence of the osmotic pressure on the volume per particle, we determined the increase in the bulk modulus of the particles with decreasing particle volume due to removal of water from the particles upon compression. This approach allowed us to quantify the strong correlation between the mechanical and hydration properties of phytoglycogen nanoparticles. |
| Databáze: | OpenAIRE |
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