Pickering emulsion
Pickering Emulsion
A Pickering emulsion is a type of emulsion that is stabilized by solid particles which adsorb onto the interface between the two phases. Named after British chemist Spencer Umfreville Pickering, who first described this phenomenon in 1907, Pickering emulsions have been extensively studied and utilized in various fields, including food science, cosmetics, pharmaceuticals, and petroleum recovery.
Overview
Unlike traditional emulsions that are stabilized by surfactants, Pickering emulsions are stabilized by solid particles. These particles can be inorganic, organic, or even biological in nature. The particles attach to the oil-water interface, creating a barrier that prevents the droplets from coalescing. This results in a more stable emulsion, with droplets that can remain separate for extended periods of time.
Mechanism
The stability of a Pickering emulsion is determined by the wettability of the particles. This is typically quantified by the contact angle, θ, which is the angle at which a liquid/vapor interface meets a solid surface. Particles with a contact angle of 0° completely wet the surface and are not suitable for stabilizing emulsions. Particles with a contact angle of 180° do not wet the surface at all and are also unsuitable. Particles with a contact angle between these two extremes can stabilize emulsions, with the most stable emulsions being formed by particles with a contact angle close to 90°.
Applications
Pickering emulsions have a wide range of applications. In the food industry, they are used to create stable, low-fat spreads and dressings. In cosmetics, they are used to create creams and lotions with a smooth texture and long shelf life. In pharmaceuticals, they are used to deliver drugs in a controlled manner. In petroleum recovery, they are used to enhance the recovery of oil from reservoirs.
See also
References
Transform your life with W8MD's budget GLP-1 injections from $125.
W8MD offers a medical weight loss program to lose weight in Philadelphia. Our physician-supervised medical weight loss provides:
- Most insurances accepted or discounted self-pay rates. We will obtain insurance prior authorizations if needed.
- Generic GLP1 weight loss injections from $125 for the starting dose.
- Also offer prescription weight loss medications including Phentermine, Qsymia, Diethylpropion, Contrave etc.
NYC weight loss doctor appointments
Start your NYC weight loss journey today at our NYC medical weight loss and Philadelphia medical weight loss clinics.
- Call 718-946-5500 to lose weight in NYC or for medical weight loss in Philadelphia 215-676-2334.
- Tags:NYC medical weight loss, Philadelphia lose weight Zepbound NYC, Budget GLP1 weight loss injections, Wegovy Philadelphia, Wegovy NYC, Philadelphia medical weight loss, Brookly weight loss and Wegovy NYC
|
WikiMD's Wellness Encyclopedia |
| Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD
