Xerogel
Overview
|
WikiDoc Resources for Xerogel |
|
Articles |
|---|
|
Most recent articles on Xerogel |
|
Media |
|
Evidence Based Medicine |
|
Clinical Trials |
|
Ongoing Trials on Xerogel at Clinical Trials.gov Clinical Trials on Xerogel at Google
|
|
Guidelines / Policies / Govt |
|
US National Guidelines Clearinghouse on Xerogel
|
|
Books |
|
News |
|
Commentary |
|
Definitions |
|
Patient Resources / Community |
|
Directions to Hospitals Treating Xerogel Risk calculators and risk factors for Xerogel
|
|
Healthcare Provider Resources |
|
Causes & Risk Factors for Xerogel |
|
Continuing Medical Education (CME) |
|
International |
|
|
|
Business |
|
Experimental / Informatics |
A xerogel ['zIrə,dTemplate:IPAεl] is a solid formed from a gel by drying with unhindered shrinkage. Gelatin is one example. Xerogel usually retains high porosity (25%) and enormous surface area (150-900 m2/g), along with very small pore size (1-10 nm). When solvent removal occurs under hypercritical (supercritical) conditions, the network does not shrink and a highly porous, low-density material known as an aerogel is produced. Heat treatment of a xerogel at elevated temperature produces viscous sintering (shrinkage of the xerogel due to a small amount of viscous flow) and effectively transforms the porous gel into a dense glass.