Photo-Curable Cooling Hydrogel for Sustained Wound Dressing Release
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Solution Overview
Problem
Conventional cold hydrogels suffer from issues such as sudden cooling agent release causing pain, premature cooling failure, drug leakage, poor biocompatibility, structural instability, and high production costs, limiting their use in chronic wounds and precision medicine.
Innovation Solution
A self-regulating photo-curable cooling hydrogel is developed using a biomimetic cooling matrix with antifreeze protein and hinokitiol, combined with a UV-curing system and isotope-labeled monomer, to achieve precise crosslinking and controlled drug release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cold hydrogels use small molecule cooling agents, then cooling effect is achieved, but the cooling agents migrate and leak into the wound, shortening effective duration and causing toxicity
Solution Approach 1:
The patent encapsulates small molecule cooling agents (menthol, borneol) within a hydrogel matrix network, nesting the active ingredients inside a protective polymer structure. This prevents direct contact and leakage into the wound while maintaining cooling effectiveness, resolving the contradiction between achieving cooling effect and avoiding toxicity/short duration
Solution Approach 2:
The patent creates a composite hydrogel system combining cooling agents with polymer networks (acrylamide, gelatin, chitosan). This composite structure integrates the cooling function with the carrier material, allowing sustained release and preventing migration/leakage of small molecule cooling agents, thus extending effective duration and reducing toxicity
2Duration of action of moving object
If temperature-responsive materials are used for sustained release, then cooling duration is extended, but compatibility with bioactive ingredients deteriorates and biotoxicity increases
Solution Approach 1:
The patent uses natural polymers (gelatin, chitosan) with inherent temperature-responsive properties that change physical state with temperature. By utilizing the natural thermal transitions of these biocompatible materials rather than synthetic temperature-responsive polymers, the system achieves sustained release while maintaining biocompatibility and reducing biotoxicity
Solution Approach 2:
The patent employs natural, biodegradable polymers that can be safely metabolized or excreted by the body. These natural materials provide temporary structural support and controlled release functionality without long-term persistence or accumulation, reducing biotoxicity concerns while maintaining adequate cooling duration
3Strength
If UV-curing system is used for crosslinking, then mechanical strength is improved, but structural stability of isotope-labeled molecules deteriorates
Solution Approach 1:
The patent incorporates isotope-labeled monomers (13C3-acrylamide, 13C6-glutaraldehyde) into the polymer chain structure before the UV crosslinking process. By pre-integrating the isotopic labels into the backbone structure that will undergo crosslinking, the labels become part of the stable crosslinked network, protecting them from degradation during and after the UV curing process
Solution Approach 2:
The patent creates a composite network structure where isotope-labeled monomers are integrated into the crosslinked matrix. This composite approach combines the mechanical strengthening effect of UV crosslinking with the stability of isotopically labeled building blocks, achieving both improved mechanical strength and preserved isotope 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 hydrogel provides long-lasting cooling, good biocompatibility, and mechanical strength, suitable for biomedical applications like wound repair and drug delivery, while ensuring temperature adaptability and biosafety.
Implementation Method 1
0.1-0.3 parts of photoinitiator... constructing a gel skeleton network, and optimizing an isotope-labeled monomer with a UV-curing system, precise crosslinking of a photosensitive network is achieved
Implementation Method 2
Through a biomimetic strategy forming a cooling matrix with allosteric dissociation characteristics from antifreeze protein and hinokitiol
Implementation Method 3
optimizing an isotope-labeled monomer with a UV-curing system, precise crosslinking of a photosensitive network is achieved
Data Source
AI summary
The invention belongs to the technical field of hydrogel materials, and specifically relates to a self-regulating photo-curable cooling hydrogel and a preparation method and an application thereof. The self-regulating photo-curable cooling hydrogel comprises the following raw materials in parts by weight: 10-17 parts of cooling matrix, 18-33 parts of acrylamide-13C3, 27-42 parts of glycerol, 5 parts of TPGDA (tripropylene glycol diacrylate), 0.05-0.15 parts of crosslinking agent, and 0.1-0.3 parts of photoinitiator. By constructing a synergistic system of antifreeze protein and konjac glucomannan skeleton, the gelation of an isotope-labeled monomer and the purpose of self-regulating cooling are achieved. It can be used for preparing drug-loaded gel dressings, cooling gel dressings, and in-situ injectable gel products. The photo-curable crosslinking technology facilitates the rapid molding of gel dressings and improves the stability of active ingredients.