Caffeic Acid Loading in Cyclodextrin Metal-Organic Frameworks
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Solution Overview
Problem
Caffeic acid and its derivatives suffer from poor chemical and physical stability, limiting their application in various fields.
Innovation Solution
A caffeic acid-based composite material is prepared by exposing a cyclodextrin metal-organic framework (CD-MOF) to a solution of caffeic acid in a short-chain alcohol, with specific molar ratios and incubation conditions to enhance stability, allowing dynamic contact and loading caffeic acid within the framework.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If caffeic acid is used directly, then good biological efficacy (antioxidation and antibacterial) is achieved, but poor chemical and physical stability limits its use
Solution Approach 1:
Caffeic acid molecules are nested within the hollow cavities of the cyclodextrin metal-organic framework. The CD-MOF structure encapsulates the caffeic acid, providing physical protection that enhances stability while preserving the biological activity of the encapsulated molecules.
Solution Approach 2:
The invention creates a composite material system combining cyclodextrin metal-organic framework with caffeic acid. This composite structure leverages the stability and structural advantages of the MOF framework while incorporating the bioactive properties of caffeic acid, achieving both stability and efficacy simultaneously.
2Area of stationary object
If traditional metal-organic frameworks are used, then large specific surface area and high porosity are achieved, but poor water solubility and toxicity remain
Solution Approach 1:
The invention changes the chemical composition parameters of traditional MOFs by replacing conventional metal ions with alkali metal ions (such as potassium, sodium, calcium). This parameter change fundamentally alters the material's properties, achieving good water solubility and non-toxicity while maintaining the advantageous porosity and surface area of MOF structures.
3Quantity of substance
If loading rate is increased, then more caffeic acid is loaded into the framework, but stability may be compromised
Solution Approach 1:
The invention performs preliminary optimization of the loading process by controlling the incubation conditions (temperature, time, solvent system) before final application. The dynamic contact incubation method allows controlled loading that maximizes caffeine acid incorporation while maintaining the structural integrity and stability of the CD-MOF framework.
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 method achieves a higher loading rate of caffeic acid with improved thermal and chemical stability, suitable for applications in food, environment, and other fields, with a loading rate of caffeic acid up to 16.52% and reduced thermogravimetric loss.
Implementation Method 1
the cyclodextrin metal-organic framework material is in dynamic contact with the solution of caffeic acid in the short-chain alcohol
Implementation Method 2
during the incubating, the cyclodextrin metal-organic framework material is in dynamic contact with the solution of caffeic acid
Data Source
AI summary
Disclosed are a caffeic acid-based composite material and a preparation method thereof. The method includes: exposing a cyclodextrin metal-organic framework material prepared from γ-cyclodextrin to a solution of caffeic acid in a short-chain alcohol to obtain a mixed material; and incubating the mixed material, wherein during the incubating, the cyclodextrin metal-organic framework material is in dynamic contact with the solution of caffeic acid in a short-chain alcohol. The prepared composite material includes a cyclodextrin metal-organic framework material and caffeic acid loaded on the cyclodextrin metal-organic framework material, wherein the cyclodextrin metal-organic framework material is prepared from γ-cyclodextrin. The caffeic acid is loaded in an amount of 15-18% of a total mass of the caffeic acid-based composite material. The caffeic acid is located in a cavity of the cyclodextrin metal-organic framework material.