Lutein Microcapsule Formulation via Fluidized Bed Drying
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Solution Overview
Problem
Existing lutein microcapsule formulations face issues with stability, water solubility, and particle size, leading to poor performance in industrial applications, including high oil content, low wall material proportion, and limited transparency in aqueous dispersion.
Innovation Solution
A lutein microcapsule formulation comprising lutein crystals, oil-soluble antioxidant, water-soluble emulsifier, wall material, filler, and water-soluble antioxidant, with a specific ratio of ingredients, and a preparation method involving melting, grinding, and spray-starch fluidized bed drying to achieve spherical microcapsules with a particle diameter of 100 nm or less, eliminating the need for organic solvents and edible oils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If lutein is wrapped in microcapsules using conventional methods (edible oil + emulsifier), then lutein stability is improved, but the formulation requires large amounts of edible oil and emulsifiers, resulting in low lutein content and poor water solubility
Solution Approach 1:
The patent extracts and eliminates edible oil and emulsifiers from the microcapsule formulation, achieving lutein encapsulation without these conventional components. This extraction allows for higher lutein content while maintaining stability through alternative wall material compositions
Solution Approach 2:
The patent changes the compositional parameters of the microcapsule wall material, using specific ratios of carbohydrates, proteins, and lipids instead of conventional edible oil-based formulations. This parameter change enables reduced oil content while maintaining encapsulation effectiveness
2Stability of the object's composition
If lutein microcapsules are prepared with conventional methods, then lutein stability is improved, but the particle diameter is large (5-40 μm), failing to reach nanometer scale and providing poor water dispersion transparency
Solution Approach 1:
The patent replaces conventional mechanical emulsification and spray drying processes with a fluidized bed drying process. This substitution enables precise control of particle size at the nanometer scale while maintaining lutein stability through the controlled formation and drying conditions
3Stability of the object's composition
If conventional microencapsulation methods are used, then lutein stability is improved, but the wall material proportion is small, resulting in poor stability and pressure resistance
Solution Approach 1:
The patent employs composite wall materials consisting of multiple components (carbohydrates, proteins, lipids) in specific proportions. This composite approach enhances both the stability and pressure resistance of the microcapsules while maintaining high lutein content, resolving the contradiction between lutein content and capsule reliability
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 formulation achieves high stability with over 97% content retention after 6 months, clear and transparent aqueous dispersion, and improved stability, overcoming limitations of previous methods such as poor pressure resistance and unsuitability for tabletting or filling hard capsules.
Implementation Method 1
melting the lutein crystal in the water-soluble emulsifier which is added with the oil-soluble antioxidant to obtain an oil phase
Implementation Method 2
fine grinding through a sand mill such that the ground emulsion particles have a particle diameter of 100 nm or less
Implementation Method 3
allowing the emulsion to be one-step granulated by a spray-starch fluidized bed drying process to obtain a spherical microcapsule formulation
Data Source
AI summary
A lutein microcapsule formulation and preparation method thereof, the formulation comprising the following ingredients: lutein crystals, a water-soluble emulsifier, an oil-soluble antioxidant, a wall material, a filler, a water-soluble antioxidant, and purified water. The preparation method comprises: dissolving the lutein crystals and the oil-soluble antioxidant in the water-soluble emulsifier to obtain an oil phase; adding the wall material, the water-soluble antioxidant, and the filler to the purified water to obtain a water phase; adding the oil phase to the water phase, grinding to obtain a particle size of the liquid emulsion of less than 100 nm, and granulating.