Emulsion Gel Freshness Indicator with Low Migration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing smart labels for food freshness detection suffer from poor pigment sensitivity and high migration rates, limiting their practical application in ensuring food safety and quality.
Innovation Solution
The development of an emulsion gel with a freshness indication and low migration rate, achieved through hydrophobic modification of anthocyanins using lipase and organic acid, followed by high-speed shearing with calcium carbonate and glucono-δ-lactone, to form a stable water-oil emulsion gel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If anthocyanins are directly mixed with traditional packaging material to create smart labels, then the preparation process is simple, but the pigment sensitivity is poor and migration rate is high
Solution Approach 1:
The patent creates a composite emulsion gel system combining anthocyanin pigments with specific packaging materials (sodium alginate, calcium carbonate, glucono-δ-lactone) in a water-oil emulsion structure. This composite approach improves pigment sensitivity and reduces migration rate while maintaining ease of manufacture through a standardized preparation process involving high-speed shearing and gelation.
2Reliability
If water-oil emulsion is used to reduce pigment migration, then migration rate decreases, but external oil phase blocks pH signal transmission and reduces sensing sensitivity
Solution Approach 1:
The patent applies local quality by creating a differentiated structure where the water phase (containing anthocyanins and pH sensors) is dispersed within the oil phase matrix. The water droplets maintain pH sensitivity while the oil phase provides migration barrier, achieving both low migration rate and high sensing sensitivity simultaneously through spatial separation of functions.
Solution Approach 2:
The emulsion gel matrix acts as an intermediary structure that allows pH signals to pass through while blocking pigment migration. The water-oil emulsion system with gelation properties serves as a mediator that transmits pH changes from the water phase to the external environment while containing the hydrophobic anthocyanin pigments within the gel network.
3Productivity
If rapid cooling of thermal reversible gel is used to prepare emulsion gel, then the gelation process is fast, but the gel obtained has poor uniformity and processing property
Solution Approach 1:
The patent changes the gelation parameters from rapid cooling to a controlled gelation process involving high-speed shearing followed by standing time. This parameter change maintains high productivity while significantly improving gel uniformity and processing properties, making the emulsion gel suitable for actual production processes.
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 emulsion gel exhibits improved stability, reduced pigment migration, and enhanced sensing performance, effectively indicating food freshness and shelf life, making it suitable for use as a smart label in food packaging.
Implementation Method 1
employs lipase and organic acid to perform hydrophobic modification of anthocyanins to obtain acylated anthocyanins
Implementation Method 2
the oil phase and the water phase are mixed and subjected to high-speed shearing
Implementation Method 3
adding calcium carbonate and glucono-δ-lactone and performing high-speed shearing again to form emulsion gel
Data Source
AI summary
Disclosed are emulsion gel with both a freshness indication and a low migration rate, and a preparation method therefor. Lipase and organic acid are used and subjected to hydrophobic modification of anthocyanins to obtain acylated anthocyanins, the acylated anthocyanins and oil-phase gel are then dissolved in vegetable oil to form an oil phase, while a sodium alginate aqueous solution is used as a water phase, the oil phase and the water phase are mixed and subjected to high-speed shearing, and calcium carbonate and glucono-δ-lactone are finally added for high-speed shearing to form emulsion gel. The emulsion gel prepared in the present disclosure has both a freshness indication and a low migration rate, and the preparation method of the present disclosure is simple, green, pollution-free and low energy consumption.