Polymeric Composite Particles for Controlled Biologic Release
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Solution Overview
Problem
Current methods for delivering biologically active agents face challenges in effectively storing and releasing these agents due to limitations in particle design and release mechanisms.
Innovation Solution
Development of polymeric composite particles with a porous polymeric core and a coating layer, where the biologically active agent is not covalently bonded to the core, allowing for diffusion-based release through the coating layer, comprising a thermoplastic polymer, wax, or their mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the biologically active agent is covalently bonded to the polymeric core, then the stability of the agent is improved, but the release efficiency deteriorates
Solution Approach 1:
The invention segments the delivery system into distinct functional components: a porous polymeric core for stable agent incorporation and a separate coating layer for controlled release. The agent is incorporated into the core without covalent bonding, maintaining stability while enabling diffusion-based release through the coating layer, thus resolving the contradiction between stability and release efficiency.
2Reliability
If a dense coating layer is used around the porous polymeric core, then the controlled release capability is improved, but the release rate deteriorates
Solution Approach 1:
The coating layer's parameters (composition, thickness, porosity) are optimized to achieve both controlled release and adequate release rate. By adjusting the coating layer's physical and chemical parameters, the system maintains controlled release capability while preventing excessively slow release rates that would occur with overly dense coatings.
3Quantity of substance
If the porous polymeric core has high porosity, then the loading capacity of biologically active agent is improved, but the structural integrity deteriorates
Solution Approach 1:
The polymeric core exhibits local quality variations with different regions having optimized properties for their specific functions. The porous structure provides high loading capacity in the core region, while the outer coating layer provides enhanced structural integrity. This spatial differentiation of properties resolves the contradiction between loading capacity and structural integrity.
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 polymeric composite particles enable controlled and efficient storage and delivery of biologically active agents, with the porous core and coating layer facilitating targeted release, enhancing the effectiveness of the delivery mechanism.
Implementation Method 1
The biologically active agent can be released from the polymeric composite particle by diffusing out of the porous polymeric core through the coating layer
Data Source
AI summary
Polymeric composite particles are provided that can be used for the storage and delivery of various biologically active agent. The polymeric composite particles contain a porous polymeric core and a coating layer around the porous polymeric core. The porous polymeric composite particles typically further include a biologically active agent positioned within the porous polymeric core but not covalently bonded to the porous polymeric core. The biologically active agent can be released from the polymeric composite particle by diffusing out of the porous polymeric core through the coating layer.