Flowable Powder Drug Compositions via Nanoparticle Spraying
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Solution Overview
Problem
Achieving uniform blends and maintaining flowability of powdered drug compositions is challenging due to issues like agglomeration and aggregation, which affects the efficacy and consistency of pharmaceutical applications, particularly in dry powder inhalers.
Innovation Solution
Surface-modified nanoparticles are suspended in a dryable liquid carrier and sprayed onto the powder drug composition, allowing for improved flowability and floodability by reducing contact with the liquid and enhancing the physical properties of the powder without causing chemical changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If surface-modified nanoparticles are added to improve flowability, then powder flow characteristics are enhanced, but handling and manufacturing complexity increases
Solution Approach 1:
A liquid carrier is used as an intermediary medium to suspend the surface-modified nanoparticles before application to the bulk powder. This allows the nanoparticles to be evenly distributed and applied without direct handling of the fine nanoparticle powder, which would be difficult to manage. The liquid carrier facilitates the transfer of nanoparticles to the powder surface, improving flowability while simplifying the manufacturing process by avoiding direct nanoparticle powder handling.
2Ease of operation
If nanoparticles are suspended in liquid carrier and sprayed onto powder, then flowability is improved, but prolonged liquid contact causes unwanted physical and chemical changes
Solution Approach 1:
The process uses rapid spray application followed by immediate drying to minimize the time the liquid carrier contacts the bulk powder. The spray is applied quickly and the liquid is rapidly evaporated or removed, allowing the nanoparticles to be deposited on the powder surface before the liquid can cause unwanted physical or chemical changes to the powder composition. This rush-through approach achieves nanoparticle coating while preserving powder stability.
Solution Approach 2:
The liquid carrier is extracted or removed after the nanoparticles are deposited on the powder surface. By removing the liquid carrier after nanoparticle transfer, the bulk powder is prevented from prolonged contact with the liquid, avoiding solvation, dissolution, or other liquid-induced changes to the powder composition while retaining the beneficial nanoparticle coating for improved flowability.
3Quantity of substance
If conventional flowability aids like fumed silica are used, then cost is reduced, but agglomeration prevention is insufficient
Solution Approach 1:
The invention combines surface-modified nanoparticles with bulk powder to create a composite material system. The surface-modified nanoparticles, when applied to the bulk powder surface, create a composite structure that provides superior agglomeration prevention compared to conventional flowability aids. This composite approach maintains cost-effectiveness while significantly improving reliability in preventing agglomeration and enhancing flowability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process results in a highly flowable and floodable powder drug composition, enhancing the homogeneity and tap density, thereby improving the delivery and storage of pharmaceuticals, particularly in dry powder inhalers, while minimizing agglomeration and aggregation.
Implementation Method 1
surface-modified nanoparticles are suspended in a dryable liquid carrier and sprayed onto the powder drug composition
Implementation Method 2
spraying the dryable liquid carrier containing nanoparticles onto particles of a powder ingredient
Implementation Method 3
evaporating off the dryable liquid carrier so as to leave the nanoparticles on the powder without the dryable liquid carrier
Data Source
AI summary
Powder drug compositions exhibiting improved flow properties are manufactured by spraying a suspension of surface-modified nanoparticles having an average particle size diameter of less than 100 nm in a dryable liquid carrier onto particles of a powder ingredient of a drug composition. The liquid carrier is rapidly dried so as to leave the nanoparticles on the powder. Other ingredients of the powder drug composition can also be added.