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The effect of blending time on particle adhesion in a model interactive system
1Department of Pharmacy, University of Queensland, St Lucia, Australia.
The Journal of Pharmacy and Pharmacology
|September 1, 1987
Summary
Drug particle adhesion in carrier systems increases with blending time, likely due to triboelectrification. This adhesion tendency, characterized by S50, varied significantly between different drug-carrier mixtures.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
Background:
- Understanding drug particle adhesion is crucial for developing stable and effective drug delivery systems.
- The interaction between drug particles and carriers influences formulation performance and drug release kinetics.
Purpose of the Study:
- To investigate the influence of blending time on drug particle adhesion within a model drug carrier system.
- To characterize the adhesion tendency using a quantitative method and explore factors contributing to increased adhesion.
Main Methods:
- A centrifuge technique was employed to measure the degree of interaction between drug particles and a model carrier.
- Adhesion profiles were analyzed as a function of rotational speed to determine the S50 value, a measure of adhesion tendency.
- Three different drug-carrier mixtures were studied to compare their adhesion characteristics.
Main Results:
- Adhesive tendency of drug particles increased with extended blending time.
- The adhesion profile followed a logarithmic normal function, enabling S50 determination.
- Significant differences in adhesion degree and saturation rates were observed among the three mixtures.
- Increased adhesion was potentially linked to triboelectrification of drug and carrier particles.
Conclusions:
- Blending time is a critical factor influencing drug particle adhesion in carrier systems.
- Triboelectrification is a probable mechanism behind the observed increase in adhesive tendencies.
- The S50 value provides a reliable metric for characterizing drug-carrier adhesion.
- Formulation development requires careful consideration of mixing parameters to control particle adhesion.
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