Conductive Me-HA Hydrogel via Thiophene Doping
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Solution Overview
Problem
Existing approaches to making methacrylated hyaluronic acid (Me-HA) conductive for electronic or electrical purposes have not been entirely successful, necessitating the development of better methods to create conductive Me-HA materials.
Innovation Solution
A novel conjugate between Me-HA and 3-thiopheneacetic acid (3TAA) is developed, which introduces electrical conductivity by delocalizing electrons through a doping process, enabling the creation of an electrically conductive hyaluronic acid polymer and solid hydrogel suitable for 3D printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If methacrylated hyaluronic acid is modified to be conductive, then electrical conductivity is improved, but biocompatibility may deteriorate
Solution Approach 1:
The patent combines methacrylated hyaluronic acid (Me-HA) with conductive polymers such as poly(3,4-ethylenedioxythiophene) (PEDOT) or polyaniline (PANI) to create a composite material. This composite structure allows the Me-HA to maintain its biocompatibility while the conductive polymer component provides the necessary electrical conductivity for cardiac tissue engineering applications.
Solution Approach 2:
The patent modifies the chemical structure of Me-HA by incorporating conductive moieties through controlled chemical reactions. By adjusting parameters such as the degree of substitution, crosslinking density, and conductive polymer content, the material achieves optimal balance between conductivity and biocompatibility for tissue engineering.
2Reliability
If Me-HA is made conductive through doping, then electrical properties are improved, but material stability may worsen
Solution Approach 1:
The patent employs biodegradable conductive polymers that are designed to degrade at controlled rates within the tissue engineering construct. This allows the material to provide electrical conductivity during the critical early stages of tissue regeneration, then gradually degrade as the native tissue takes over, avoiding long-term stability issues.
Solution Approach 2:
The patent creates spatially heterogeneous structures where conductive components are localized to specific regions that require electrical signaling (such as myocardial tissue interfaces), while other regions maintain the native biocompatible Me-HA structure. This localized approach provides electrical properties where needed while preserving overall material stability.
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 resulting conductive hyaluronic acid hydrogel demonstrates improved conductivity while maintaining biocompatibility, making it suitable for cardiac and neural tissue engineering applications as well as electronic devices.
Implementation Method 1
when treated with an oxidizing agent, thiophene electrons are delocalized via a process called doping. Doping intentionally introduces impurities into a compound to change its electrical properties. The delocalized electrons move along the polymer backbone forming a charged unit called a bipolaron.
Implementation Method 2
thiophene electrons are delocalized via a process called doping. The delocalized electrons move along the polymer backbone forming a charged unit called a bipolaron.
Implementation Method 3
methacrylated hyaluronic acid (Me-HA) adds a UV cross linkable component to hyaluronic acid, making it possible to 3D print hydrogels for tissue engineering applications.
Data Source
AI summary
An engineered material includes a conductive biopolymer including a plurality of layers, each of which includes methacrylated hyaluronic acid conjugated with at least one of 3-thiophene acetic acid and with poly(3-thiophene) acetic acid; and myocytes. The myocytes can include iPSC-derived cardiomyocytes. The myocytes can be substantially aligned in single lines. The single lines can be approximately parallel to one another and approximately normal to planes defined by the plurality of layers. A method of 3D printing the layers is also described.