Alginate-Polyurethane Hydrogel for Biocompatible Wound Dressings
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Solution Overview
Problem
Conventional wound dressings with fully synthetic materials face issues of biocompatibility, sustainability, and environmental compatibility, necessitating a more biocompatible, sustainable, and environmentally friendly alternative for wound treatment.
Innovation Solution
A polymer is produced using an isocyanate-terminated prepolymer reacting with alginate, where alginate is covalently bound within a polyurethane hydrogel or foam system, utilizing natural and renewable alginate from brown algae, reducing the reliance on synthetic materials and enhancing biocompatibility and sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fully synthetic materials are used in wound dressings, then manufacturing precision and structural stability are improved, but biocompatibility and environmental compatibility deteriorate
Solution Approach 1:
The patent uses composite materials by combining synthetic polyurethane polymer with natural alginate from brown algae. This creates a hybrid material that maintains the structural stability and manufacturing advantages of synthetic materials while incorporating the biocompatibility and biodegradability of natural materials. The alginate is integrated into the polyurethane matrix to form a composite hydrogel or foam structure.
Solution Approach 2:
The patent modifies the chemical composition parameters of the wound dressing by incorporating alginate at specific concentrations (typically 5-50 wt% of total polymer content). This parameter change transforms the material properties to achieve both biocompatibility and structural integrity, balancing natural and synthetic characteristics.
2Reliability
If natural materials like alginate are used, then biocompatibility and sustainability are improved, but structural stability and manufacturing precision deteriorate
Solution Approach 1:
The synthetic polyurethane component provides the structural framework and mechanical strength, while the natural alginate provides biocompatibility. The composite structure allows the material to maintain structural stability during manufacturing and use, while the alginate content ensures gentle interaction with wound tissue.
Solution Approach 2:
The patent applies different material properties to different regions or aspects of the wound dressing. The polyurethane matrix provides structural stability and shape retention, while the alginate phases provide biocompatibility and moisture management. This local differentiation of material qualities allows both requirements to be satisfied simultaneously.
3Object-affected harmful factors
If conventional hydrogels are used for wound treatment, then wound moisture management is improved, but tissue compatibility and environmental sustainability deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating biodegradable alginate into the polyurethane structure. This modification allows the material to maintain its hydrogel moisture-management properties while introducing biodegradability. The alginate content and molecular weight are optimized to balance tissue compatibility with environmental sustainability.
Solution Approach 2:
The patent converts the potential harm of non-biodegradable synthetic materials into a benefit by incorporating biodegradable alginate. The alginate component can be metabolized by bacteria and fungi in the environment, transforming the waste problem into a beneficial decomposition process that returns nutrients to the ecosystem while maintaining wound treatment efficacy.
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 polymer improves compatibility with human and animal tissues, supports wound healing by maintaining a moist environment, and is easy to produce, while being non-toxic and biodegradable, thus offering effective and gentle wound treatment.
Implementation Method 1
reacting the prepolymer in the reaction mixture to obtain the polymer... at least a portion of the alginate, or preferably the entire amount of the alginate, is covalently bound in the polymer
Implementation Method 2
Wound dressings with a hydrogel layer can both absorb wound exudate and moisturize the wound... The polymer can create a moist wound environment that supports wound healing by absorbing wound exudate and/or releasing moisture into the wound
Implementation Method 3
A hydrogel is a dispersed system consisting of at least one solid hydrophilic phase and a liquid, aqueous phase
Data Source
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AI summary
The present invention relates to a process for producing a polymer for medical purposes, in particular for wound treatment. The invention also relates to the polymer obtained by the process itself, as well as its use in medicine and in wound dressings. In principle, the produced polymer provides a hydrated polyurethane hydrogel system or a hydrated polyurethane foam system in whose cross-linked polymer structure alginate is firmly embedded, particularly by covalent incorporation. The produced polymers can be more biocompatible, sustainable, and environmentally friendly due to the inclusion of a natural substance, namely alginate.