Milk Protein Concentrate Microcapsules Encapsulation Efficiency
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Solution Overview
Problem
Milk protein concentrates (MPC) as microencapsulation wall materials have low encapsulation efficiency and poor protection of core materials, particularly polyunsaturated fatty acids like conjugated linoleic acid, compared to traditional milk protein ingredients like WPC and SC, leading to high oxidation rates and poor physical and chemical stability.
Innovation Solution
Pretreatment of MPC using ion exchange resin, acidity adjustment with food-grade acidifiers, or ion chelation to enhance its properties as a microencapsulation wall material, improving encapsulation efficiency and stability by forming a denser shell layer during the microencapsulation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If MPC is used as microencapsulation wall material without pretreatment, then the production cost is lower and the preparation process is simpler, but the encapsulation rate is low (about 80% vs 90%+ for WPC) and the oxidation protection is poor
Solution Approach 1:
The patent applies preliminary action by performing pretreatment on MPC before using it as microencapsulation wall material. The pretreatment involves adjusting pH to isoelectric point (pH 4.6-5.2) and heat treatment at 60-80°C for 30-60 minutes, which modifies the protein structure in advance to improve encapsulation performance while maintaining the cost advantage of MPC
2Ease of manufacture
If MPC is used as microencapsulation wall material without pretreatment, then the production cost is lower, but the oxidation rate of core material is higher (up to 7 times higher than WPC)
Solution Approach 1:
The patent applies parameter changes by modifying the pH parameter to the isoelectric point range (4.6-5.2) and temperature parameter (60-80°C) during pretreatment. These parameter adjustments optimize the protein conformation and hydrophobicity, creating a better protective barrier against oxidation while maintaining MPC's cost advantage
3Device complexity
If MPC is used as microencapsulation wall material without pretreatment, then the preparation process is simpler, but the microcapsule quality is poor (uneven shrinkage, deep surface depression, loose inner wall, high capillary oil)
Solution Approach 1:
The patent applies preliminary action through pretreatment that includes pH adjustment and heat treatment before microencapsulation. This preliminary modification of MPC structure ensures more uniform shrinkage, smoother surface, denser inner wall, and reduced capillary oil content during the subsequent microencapsulation process, without significantly increasing process complexity
4Ease of manufacture
If MPC is used as microencapsulation wall material without pretreatment, then the raw material cost is lower, but the dispersibility and solubility of microcapsule powder are poor
Solution Approach 1:
The patent applies parameter changes by adjusting pH to the isoelectric point and applying heat treatment, which modifies the surface properties and charge distribution of the protein molecules. This improves the dispersibility and solubility of the resulting microcapsule powder while maintaining the cost advantage of using MPC as raw material
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 pretreatment of MPC significantly increases the encapsulation rate from 80% to 93% or above, enhances the oxidation stability of the core material, and improves the physical and chemical stability of microcapsules, making MPC a competitive milk protein ingredient for various applications.
Implementation Method 1
0.1-30 g of ion exchange resin is added to each 100 g of protein solution, and the mixed solution is stirred for a period of time for treatment
Implementation Method 2
addition of exogenous reagents for acidity adjustment and ion chelation
Implementation Method 3
addition of exogenous reagents for acidity adjustment and ion chelation
Implementation Method 4
the microcapsules are liquid (that is, emulsions in various forms) or solid
Data Source
AI summary
The disclosure discloses a milk protein concentrate-based microencapsulation wall material and microcapsules, and belongs to the technical field of microcapsule preparation. In the disclosure, liquid or solid microcapsules are prepared by performing cation exchange treatment on milk protein concentrates, and then using the treated milk protein concentrates as a wall material. The prepared microcapsules have good physical and chemical stability during storage, and are suitable for protecting active functional factors and to be applied in the fields of food, medicine, health care products, cosmetics, daily chemicals and the like.