Pectin Gel Encapsulation via High Hydrostatic Pressure
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Solution Overview
Problem
Traditional hydrogels prepared from synthetic materials are not suitable for food applications due to health concerns, and existing methods for encapsulating loads in food-grade hydrogels are limited in terms of biocompatibility and microbiological safety.
Innovation Solution
A method for encapsulating loads using a pectin gel that involves dissolving high-methoxyl pectin in water, treating it under high hydrostatic pressure to convert it into a sol state, mixing with the load, and then reforming the gel, followed by coating with low-methoxyl pectin to enhance structural strength and prevent rapid dissolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If synthetic materials are used to prepare hydrogels, then the structural strength and stability are improved, but the biocompatibility and food safety are worsened
Solution Approach 1:
The patent changes the chemical composition parameters by using natural pectin polymers instead of synthetic materials, while adjusting physical parameters like degree of methoxylation (5-80%) and molecular weight to achieve both biocompatibility and structural strength suitable for food applications
Solution Approach 2:
The patent creates composite hydrogel systems by combining pectin with other natural polymers or additives to enhance structural properties while maintaining biocompatibility, forming multi-component systems that leverage the advantages of each component
2Reliability
If high temperature treatment is used for sterilization, then the microbiological safety is improved, but the activity of encapsulated substances is worsened
Solution Approach 1:
The patent replaces thermal sterilization with high hydrostatic pressure treatment (100-1000 MPa), substituting a mechanical/physical pressure system for a thermal system to achieve sterilization without the harmful effects of high temperature on sensitive encapsulated substances
Solution Approach 2:
The patent utilizes phase transition of pectin gel under high pressure, where the gel undergoes sol-gel transition at specific pressure ranges, enabling sterilization and structural modification simultaneously while maintaining the integrity of temperature-sensitive components
3Adaptability or versatility
If high hydrostatic pressure is applied to pectin gel, then the gel structure is converted to sol state for load encapsulation, but the gel stability is worsened
Solution Approach 1:
The patent exploits the dynamic reversibility of pectin gel-sol transitions under pressure, where the gel can be converted to sol state for encapsulation and then revert to gel state for stability, creating a dynamically controllable system that adapts to different process stages
Solution Approach 2:
The patent employs periodic pressure cycling to repeatedly transform the pectin between gel and sol states, enabling multiple encapsulation cycles or sequential processing steps while maintaining overall system stability through controlled reversibility
4Productivity
If the gel is formed quickly after pressure relief, then the productivity is improved, but the uniformity of load distribution is worsened
Solution Approach 1:
The patent performs preliminary mixing of the load with the sol state pectin immediately upon pressure relief, before gelation occurs, ensuring uniform load distribution is established in the liquid phase before the gel structure forms and locks it in place
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
This method provides a biocompatible and biodegradable gel with improved microbiological safety, allowing for controlled release of encapsulated substances like microorganisms, enzymes, and small molecules, while avoiding high temperature-induced activity destruction and ensuring uniform load distribution.
Implementation Method 1
treating it under high hydrostatic pressure to convert it into a sol state
Implementation Method 2
treated at the pressure of 400-600 MPa for 5-30 min
Implementation Method 3
a low-methoxyl pectin gel membrane is attached to the gel surface
Data Source
AI summary
The invention relates to a method for embedding a load based on gel high hydrostatic pressure liquefaction. Using the phenomenon that the physical gel is liquefied under high pressure, the vacuum-packaged high-methoxyl pectin gel is treated under a pressure of 400-600 MPa for 5-30 min, mixed with the load, and then subjected to a pressure of 400-600 MPa for homogenization treatment for 5 to 30 min. After pressure relief, the liquefied gel is poured into a mold for reshaping, followed by removal of free water and coating treatment. This method combines the advantages of high hydrostatic pressure technology in modification and sterilization. It has mild embedding conditions and wide sources of raw materials to prepare the carrier, which has excellent biocompatibility and biodegradability. It can be widely used for embedding microorganisms, enzymes, proteins and small molecular substances. The loaded gel prepared by the method has high microbial safety, can effectively maintain the activity of the load. The load distribution is uniform, and the load amount is much larger than the traditional adsorption load.