Hydroxybutyl Chitin Hydrogel for Water Dispersibility and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Chitin derivatives have poor solubility and limited dispersibility in aqueous solutions, hindering their application in fields like tissue engineering and medical apparatuses.
Innovation Solution
A method involving the modification of chitin with epoxybutane to produce hydroxybutyl chitin, followed by dialysis and freeze-drying, results in a hydroxybutyl chitin with improved dispersibility and stability, enabling the formation of a physical hydrogel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If chitin is modified with traditional reagents (halogenated hydrocarbon or epoxy reagents), then water solubility is improved, but phase separation and uncontrollable precipitation occur during modification
Solution Approach 1:
The patent changes the chemical structure parameter of the modification reagent from traditional epoxy reagents to epoxybutane, which has different steric and electronic properties. This parameter change allows the modification to proceed without phase separation while improving water solubility. The specific structural parameters of epoxybutane (molecular size, reactivity) are optimized to prevent uncontrollable precipitation while achieving the desired solubility enhancement.
2Reliability
If chitin derivatives are used to form hydrogels, then biocompatibility is maintained, but dense molecular packing limits solubility and modification
Solution Approach 1:
The patent applies preliminary alkaline treatment to chitin before modification with epoxybutane. This preliminary action disrupts the dense molecular packing and hydrogen bonding network of native chitin, creating a more accessible structure for subsequent modification. The alkaline treatment pre-opens the molecular structure, making the chitin more soluble and easier to modify while preserving biocompatibility, as the alkaline treatment is followed by neutralization and purification steps.
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 hydroxybutyl chitin exhibits good dispersibility and forms a stable physical hydrogel, suitable for applications in tissue engineering and Class III medical instruments.
Implementation Method 1
adding epoxybutane or diluted epoxybutane to a chitin aqueous phase system, and conducting stirring for a reaction
Implementation Method 2
subjecting chitin to standing and dispersion in an alkaline aqueous solution at low temperature
Implementation Method 3
after the reaction is completed, conducting dialysis and freeze-drying to obtain the hydroxybutyl chitin
Data Source
AI summary
Disclosed in the present disclosure are a hydroxybutyl chitin, a hydroxybutyl chitin hydrogel and a preparation method thereof. Chitin is subjected to pulverization, dissolution, modification with epoxybutane, and purification to obtain a final product, namely the hydroxybutyl chitin. The hydroxybutyl chitin prepared by the method has good solubility in purified water, and a hydrogel with a low solid content can be formed. The hydroxybutyl chitin hydrogel will have a wide application aspect in biomedicine, absorbable materials, and other fields.