Microbubbles and Oil Droplets Stabilized by a Class II Hydrophobin in Marinelike Environments
| Autor: | Paul S. Russo, Bradford Blalock, Francisco R. Hung, Yuwu Chen, Xujun Zhang, Wayne Huberty |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Microbubbles
Cyclohexane Dodecane Hydrophobin Surface Properties Surfaces and Interfaces Mycotoxins Condensed Matter Physics Dispersant Solvent Fungal Proteins chemistry.chemical_compound Membrane chemistry Chemical engineering Oil droplet Amphiphile Electrochemistry General Materials Science Particle Size Hydrophobic and Hydrophilic Interactions Oils Spectroscopy |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 35(12) |
| ISSN: | 1520-5827 |
| Popis: | Hydrophobins are abundant amphipathic proteins produced by fungi. They have been interacting with oils in natural environments for millions of years; therefore, it is sensible to consider them as surfactants and dispersants for cleaning oil spills. To better understand the properties of these amphipathic proteins in seawater, a particular hydrophobin known as cerato-ulmin (CU; mass 7627 g/mol) was studied. CU is adept at forming strong membranes, as indicated by the capacity to stabilize gas-filled bubbles and oil-filled droplets with cylindrical and other nonspherical shapes. The limits of this unusual ability were tested using a wide variety of solvent conditions, including various salt solutions, alcohols, simple hydrocarbons (i.e., cyclohexane, dodecane), acids, and bases. CU concentrations ranged from 20 to 200 μg/mL. The bubbles and other structures made by CU in the presence of various gases span an enormous range of size, from nanometers to millimeters. After larger objects float to the surface, smaller structures remain, and these were found by light scattering to have a hydrodynamic diameter of ∼200 nm. |
| Databáze: | OpenAIRE |
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