Composite Biomaterials for Tissue Integration and Durability
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Solution Overview
Problem
Current biomaterials for regenerative medicine, such as those used for damaged organs like the nose, ear, and heart valves, face challenges including poor integration with surrounding tissue, thrombogenicity, durability issues, and biocompatibility problems, leading to ineffective reconstruction and replacement solutions.
Innovation Solution
A composite material is developed by covalently bonding functionalized carbon nanoparticles with polyols and compounds containing isocyanate groups via urethane, urea, and amide linkages, creating a copolymer suitable for implantable devices like vascular grafts and urinary catheters, enhancing biocompatibility and integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional biomaterials are used for tissue replacement, then structural integrity is achieved, but integration with surrounding tissue is poor
Solution Approach 1:
The invention uses composite materials consisting of carbon nanoparticles dispersed in a polyol matrix with specific molecular weight ratios and functional group distributions. This composite structure provides both the structural integrity of the carbon nanoparticles and the tissue-integration capabilities of the polyol matrix, resolving the contradiction between strength and adaptability.
Solution Approach 2:
The invention creates local quality variations within the biomaterial by controlling the distribution and concentration of carbon nanoparticles in different regions of the polyol matrix. This allows different areas of the implant to have optimized properties for either structural support or tissue integration depending on the specific anatomical requirements.
2Duration of action of stationary object
If synthetic vascular graft materials are used, then durability is improved, but biocompatibility and thrombogenicity worsen
Solution Approach 1:
The invention changes key parameters of the biomaterial including the molecular weight of the polyol (500-5000 Da), the concentration of carbon nanoparticles (0.1-10 wt%), and the functional group composition to achieve optimal balance between durability, biocompatibility, and thrombogenicity resistance.
Solution Approach 2:
The invention utilizes biodegradable polyol matrices that gradually degrade over time, allowing temporary synthetic support during the critical healing period while ultimately being replaced by natural tissue, thus avoiding long-term thrombogenicity issues associated with permanent synthetic materials.
3Shape
If cartilage is taken from ribs for reconstruction, then structural replacement is achieved, but invasiveness and effectiveness worsen
Solution Approach 1:
The invention uses a synthetic polyol-carbon nanoparticle composite as an intermediary material that can be precisely molded into the required anatomical shape without requiring harvesting from donor sites. This intermediary material provides the necessary structural replacement while avoiding the invasiveness of autologous cartilage harvesting.
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 composite material demonstrates improved biocompatibility, cell growth compatibility, and reduced inflammatory responses, offering a more effective solution for regenerative medicine applications by mimicking the viscoelastic properties of native tissues and reducing thrombogenicity.
Implementation Method 1
a copolymer of at least (i) a functionalised carbon nanoparticle, (ii) a polyol, (iii) a compound comprising at least two isocyanate groups, wherein the functionalised carbon nanoparticle and the polyol are covalently bonded by a urethane and optionally a urea and/or an amide linkage
Implementation Method 2
covalently bonded by a urethane and optionally a urea and/or an amide linkage
Implementation Method 3
covalently bonded by a urethane and optionally a urea and/or an amide linkage
Implementation Method 4
covalently bonded by a urethane and optionally a urea and/or an amide linkage
Data Source
AI summary
A composite material that is a copolymer of at least (i) a functionalised carbon nanoparticle, (ii) a polyol, (iii) a compound comprising at least two isocyanate groups, wherein the functionalised carbon nanoparticle and the polyol are covalently bonded by a urethane and optionally a urea and/or an amide linkage, and a process for producing the same. The composite materials are suitable for use in moulded articles for implantation within a mammal.