Researchers at
Princeton University have developed a novel technique for formation of a new
random bicontinuous silicate mesomorph with advantageous pore structure and
overall morphology. Princeton is currently seeking industrial collaborators to
commercialize this technology.
Most procedures for
forming mesoporous silicates rely on the micelle-forming properties of a
surfactant, typically at low concentration. The addition of an inorganic
precursor, such as siloxane, leads to association and co-assembly into a liquid
crystal precipitant. Subsequent polymerization of the inorganic precursor and
removal of the surfactant results in a ridged silica shell in the structural
shape of the liquid crystal. However, this method limits the ability to predict
the liquid crystal structure and generally produces a powder of micrometer-sized
particles, thereby limiting uses in filtration, optical or electronic
applications where large area thin films or large uniform monoliths of material
are required.
The new method
produces large, water-clear monoliths that contain a random, bicontiuous pore
structure. As opposed to silica xerogels and aerogels, there is little variation
in the size of the pores, the pore dimension is readily selected, and the
structure is physically robust. Additionally, characteristic pore sizes of 6 to
>35 nm have been obtained and larger sizes appear feasible. Transmission
electron microscopy images show a random pore network and BET measurements
indicate surface areas between 375 and 525 m2/g.
Patent protection is
pending.
For more information please
contact:
William H. Gowen
Office of Patents and
Licensing
Princeton University
5
New South Building
Princeton, NJ 08544-0036
(609) 258-6762
(609) 258-1159 fax
wgowen@princeton.edu