New method of obtaining nanopar-ticles by a modified
sol-gel method using sucrose and pectin as pre-cursors
Advantages of the new method
- Expensive equipment is not required - the basic infrastructure in every chemical lab is enough
- The organic precursors are cheap and easily available, even from the supermarked
- One, two, three or more types of particles may be obtained in a single sol-gel process. Thus only one calcination process may be enough to obtain a complex final products reducing calcination process.
- The new precursors have proven to yield a superior product to some of the traditional ones (less agglomerated product, smaller particles)
- Sucrose and pectin act as an efficient internal fuel, thus further reducing the energy requirement for the calcination process.
Nanoparticles are widely used in industry, for inststance cosmetics and coatings, commercial potential in the fuel cell industry
The sol-gel method is one of the most used chemical methods for obtaining nanoparticles. This is
so called Òsoft chemistryÓ because non-aggressice, dilute solutions are used at low tempratures.
The research and development of this new variant of the sol-gel method has led to chemically pure
nanosized powders with narrow particle size distributions. Through this method nanoparticles
of AI203, Ti02, Zr02, 8%Y203-92%Zr02 (8YSZ) and Gd02-Ce02 have been obtained with very
good reproducibility.The sol-gel method involves the use of two diluted solutions: the frist one containing the precursor
salts and the second one containing some organic precursor, traditionally ethylene glycol, glycerin
or citric acid. The new sol-gel method uses sucrose and pectin as organic precursors. Addition
of sucrose and pectin to the solution of precursor salts form a polymer matrix in which the metal
cation(s) are distributed through the polymer structure. The whole composition is slowly dried at
about 100oC to form first an sol and then a gel. By subsequent calcination, nanopowders with the
desired chemical composition and crystal structure are obtained.
The new organic precursors are both ubiquitous and environmentally friendly. Sucrose (C6H12O6)
constitutes about 99% of table sugar, and pectin is an important constituent in ripe fruits and
some vegetables, both are widely used in the food and health industries.
Interested in this technology?
Patent has been filed in the United States and
Norway, Interested investors or
partners may contact Bergen Techtrans
Office (BTO) for details:
Trond Thomassen - Business Associate
Tel: +47 55 58 30 53
Cell: +47 952 25 058
Dr Crina S. Ilea (Suciu) - Research Fellow
Prototech and the University of Bergen
Tel: +47 55 57 41 01