Conductive Hydrogel with Self-Healing Oligopeptide Network
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Solution Overview
Problem
Conventional hydrogels used in biomedical applications lack conductivity and proper mimicry of the extracellular matrix, leading to suboptimal bio-integration and performance in neuroprostheses, biosensors, and drug delivery due to weak mechanical and electrical properties.
Innovation Solution
A conductive hydrogel comprising polystyrene sulfonate compounds like PEDOT:PSS, rGO:PSS, and rGO:PEDOT:PSS, combined with a conjugate of polyethylene glycol (PEG) and a linker-(BX)n oligopeptide, which enables non-covalent assembly, self-healing, and tunable rheological and electrical properties, mimicking the extracellular matrix effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydrogels are used in biomedical applications, then they provide basic structural support and biocompatibility, but they lack conductivity and proper mimicry of the extracellular matrix, leading to suboptimal bio-integration and performance
Solution Approach 1:
The patent combines conductive polymers (PEDOT, PSS) with hydrogel matrices to create composite materials that simultaneously provide structural support, biocompatibility, and electrical conductivity. This composite approach resolves the contradiction by integrating multiple functions into a single material system that can both support biological integration and conduct electrical signals.
Solution Approach 2:
The hydrogel system is designed to perform multiple functions simultaneously: providing structural support, enabling electrical conductivity, mimicking extracellular matrix properties, and facilitating bio-integration. This multi-functional design allows the material to adapt to various biomedical applications while maintaining reliable performance across different contexts.
2Adaptability or versatility
If non-covalently assembled networks are used to mimic the extracellular matrix, then they provide dynamic network properties and self-healing capabilities, but they may lack mechanical robustness and stability
Solution Approach 1:
The patent utilizes changes in physical parameters such as temperature, pH, and ionic strength to modulate the properties of the hydrogel network. These parameter changes enable the material to transition between different states, providing self-healing capabilities when needed while maintaining adequate mechanical robustness through controlled network dynamics.
Solution Approach 2:
The non-covalent assembly creates a dynamic network that can reorganize and self-heal in response to mechanical stress or environmental changes. This dynamic character allows the material to recover from damage while maintaining overall structural integrity and mechanical robustness through continuous network rearrangement.
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 conductive hydrogel provides a stable, biocompatible, and easily producible matrix with enhanced mechanical robustness, self-healing capabilities, and adjustable conductivity, suitable for various biomedical applications including neuroprostheses, biosensors, and drug delivery.
Implementation Method 1
a conductive hydrogel comprising a polystyrene sulfonate compound selected from poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), reduced graphene oxide polystyrene sulfonate (rGO:PSS) and rGO:PEDOT:PSS
Implementation Method 2
a non-covalently assembled network using modular building blocks
Data Source
AI summary
The present invention provides a conductive hydrogel comprising a polystyrene sulfonate compound selected from poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), reduced graphene oxide polystyrene sulfonate (rGO:PSS) and rGO:PEDOT:PSS; and a conjugate of polyethylene glycol (PEG) and a linker-(BX)n oligopeptide of formula (I)PEG-linker-(BX)n (I)wherein B is lysine or arginine, X is selected from alanine, glycine, serine, threonine, tyrosine, glutamic acid or aspartic acid and n is an integer selected from 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20. The invention further relates to processes for assembling the conductive hydrogel. The conductive hydrogel can be used in various biomedical applications, such as neuroprostheses, biosensors, nerve grafts, cell culture and encapsulation of cells and microorganisms as well as for drug delivery.