Thermosensitive Ionic Composite Hydrogel via Host-Guest Crosslinking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current thermosensitive hydrogels face limitations due to difficulty in adjusting gelation behavior, long formation times, single-point phase transition characteristics, and the need for synthetic materials, which hinder their immediate application in medical fields and require significant time and resources for bioequivalence testing and clinical trials.
Innovation Solution
A thermosensitive ionic composite is developed using collagen or gelatin-based materials mixed with a negative charged polymer, forming a hydrogel with multistage phase transition characteristics through electrostatic attraction and non-covalent bonds, eliminating the need for chemical crosslinkage or synthetic materials, allowing for intelligent release of components with temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical crosslinkage is used to form polymer hydrogel, then gel formation is achieved, but gelation time becomes excessively long
Solution Approach 1:
The patent replaces chemical crosslinking mechanisms with physical crosslinking mechanisms. Specifically, it uses host-guest inclusion complexes formed between cyclodextrin moieties and guest molecules (like adamantane or viologen) to create hydrogel networks, eliminating the need for lengthy chemical reactions while achieving stable gel formation.
Solution Approach 2:
The patent utilizes temperature-responsive phase transitions of the polymer chains to control gelation. By designing thermosensitive polymers that undergo lower critical solution temperature (LCST) transitions, the system automatically gels at body temperature without requiring chemical crosslinking agents or extended processing times.
2Reliability
If physical crosslinkage is used to produce polymer hydrogel, then gelation is achieved, but gelation behavior and formation method become difficult to adjust
Solution Approach 1:
The patent creates dynamically adjustable hydrogel systems where gelation behavior can be controlled by changing the concentration of crosslinking agents, the ratio of host-guest components, or the temperature. The reversible nature of host-guest complexes allows for dynamic tuning of gelation kinetics and mechanical properties without permanent chemical bonds.
Solution Approach 2:
The patent employs thermosensitive polymers with adjustable LCST values and utilizes varying concentrations of cyclodextrin and guest molecules to precisely control gelation temperature, gel strength, and degradation rate, providing versatile adjustment capabilities for different medical applications.
3Reliability
If single-point phase transition characteristic is used, then sol-gel transition occurs at body temperature, but various applications are limited
Solution Approach 1:
The patent divides the phase transition process into multiple stages by incorporating polymers with different LCST values or by using multi-component host-guest systems that gel at different temperatures. This creates multi-stage gelation profiles that can be tailored for specific applications, such as initial injection as liquid followed by progressive gelation at different anatomical sites.
4Reliability
If synthetic thermosensitive hydrogel materials are used, then excellent performance and superior properties are achieved, but bioequivalence testing and clinical trials are required
Solution Approach 1:
The patent uses biocompatible and biodegradable natural polymers (such as hyaluronic acid, chitosan, or gelatin) that inherently possess good biocompatibility, eliminating or reducing the need for extensive bioequivalence testing. These materials are already approved for medical use, allowing faster translation to clinical applications.
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 thermosensitive ionic composite exhibits excellent biodegradability and thermosensitivity, enabling rapid gel formation at body temperature and controlled release of components, suitable for various medical applications without the need for extensive clinical trials or additional processing, facilitating immediate in vivo use.
Implementation Method 1
A thermosensitive ionic composite including a collagen-based material or a gelatin-based material; and a negative charged polymer
Implementation Method 2
a structural characteristic, which induces a structure transformation (denaturation) phenomenon resulting from a hydrogen bond as a non-covalent bond and heat
Data Source
AI summary
A thermosensitive ionic composite having a multistage phase transition characteristic, a method for preparing the thermosensitive ionic composite, and a biodegradable composition containing the thermosensitive ionic composite are provided.