Functionalized and crosslinked polymers
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Solution Overview
Problem
Existing biocompatible polymers lack the ability to interact naturally with biological systems to manipulate physiological responses such as wound healing and cellular interactions, limiting their application in medical treatments and devices.
Innovation Solution
Derivatives of polyhydric polymers, such as hyaluronic acid, are modified with hydroxyl groups and crosslinked using divinyl sulfone and nucleophiles to create functionalized and crosslinked polymers with specific functional groups, allowing for controlled interactions with biological systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unmodified biocompatible polymers are used, then biocompatibility is maintained, but the ability to interact with biological systems and manipulate physiological responses is lost
Solution Approach 1:
The patent modifies the chemical structure of hyaluronic acid by changing parameters such as molecular weight, degree of branching, and introduction of functional groups (carboxylic acid, amine, sulfonic acid). These parameter changes enable the polymer to interact with biological systems while maintaining biocompatibility, resolving the contradiction between biocompatibility and physiological interaction capability.
Solution Approach 2:
The patent creates composite structures by combining hyaluronic acid with crosslinking agents and functional groups to form a multi-functional polymer system. This composite approach allows the material to simultaneously maintain biocompatibility and gain new interaction capabilities with biological systems.
2Adaptability or versatility
If polymers are modified to interact with biological systems, then physiological interaction capability is improved, but the simplicity of the original polymer structure is lost
Solution Approach 1:
The patent introduces functional groups and crosslinking at specific locations within the hyaluronic acid structure rather than uniformly throughout. This local modification approach maintains the overall simplicity of the polymer structure while adding specific interaction capabilities where needed, thus resolving the contradiction between interaction capability and structural simplicity.
Solution Approach 2:
The patent segments the modification process into controlled steps: first introducing functional groups at specific positions, then performing crosslinking. This segmentation allows complex functionality to be built systematically while maintaining control over the overall structure, preventing excessive complexity.
3Stability of the object's composition
If crosslinking is performed to enhance polymer stability, then structural stability is improved, but the ability to undergo enzymatic degradation is reduced
Solution Approach 1:
The patent uses crosslinking agents as intermediaries that create controlled crosslinks within the hyaluronic acid structure. These crosslinks provide structural stability while leaving the polymer susceptible to enzymatic degradation through specific pathways, thus resolving the contradiction between stability and degradability.
Solution Approach 2:
The patent controls the degree and type of crosslinking as a parameter that can be adjusted to balance stability and degradation. By changing crosslinking density and chemistry, the material can be optimized for different application requirements, maintaining both structural integrity and enzymatic degradability.
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 modified polymers exhibit enhanced biocompatibility and physiological interaction, enabling applications in wound healing, dermal fillers, joint pain relief, and other medical treatments.
Implementation Method 1
Derivatives of polyhydric polymers, such as hyaluronic acid, are modified with hydroxyl groups and crosslinked using divinyl sulfone and nucleophiles to create functionalized and crosslinked polymers
Data Source
AI summary
Polyhydric polymers may be converted to derivatives thereof by reaction with divinyl sulfone to provide vinyl sulfone substituted polymers, where the polymers may additionally be further derivatized, including crosslinked, and the crosslinked and non-crosslinked derivatives may be used in biomedical and other applications.