Projects / Programmes
Use of inorganic particles for particle design and their potential application in systems with modified release
Code |
Science |
Field |
Subfield |
1.09.00 |
Natural sciences and mathematics |
Pharmacy |
|
Code |
Science |
Field |
T150 |
Technological sciences |
Material technology |
T130 |
Technological sciences |
Production technology |
composites, controlled release, amorphicity, modification of physicochemical properties, coating of composites
Researchers (8)
Organisations (2)
Abstract
Dissolution of drug substances is one of the biggest challenges in development of pharmaceutical formulations because the dissolution rate decisively affects the absorption and uptake of drugs. In the project, various new drug substance-inorganic substrate composites will be prepared. The specific nanoarchiterctural features of different composites will control the rate of drug dissolution. The new composites will be prepared either using a sol-gel procedure or precipitation from mixtures of solvents. The first research segment will comprise preparation of biocompatible inorganic coatings with controlled thickness, porosity and selected solubility. The final properties of the composites (dissolution rate, compressibility) will also be determined by drug pretreatment (micronization etc.). In the second segment, the drug will be incorporated into inorganic gel structure. The resulting drug amorphization and stabilization will have influence on dissolution rate but also on stability against moisture and oxygen. In the third segment, the substance will be adsorbed, deposited or incorporated (matrix type) onto or into biocompatible inorganic nanoparticles. Due to increased surface area, such a composite structure usually leads to an increase of the dissolution rate and, at the same time, to a mechanically more stable material. In the last segment, drug particles will be designed using a procedure of controlled liquid-solid transition in the presence of specific additives. The procedures are expected to change the size, morphology, surface area and porosity of the resulting particles.