Semi-permeable Container Top for Ascorbic Acid Degradation Venting
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Solution Overview
Problem
Ascorbic acid is unstable in solutions, particularly degrading into carbon dioxide, which leads to packaging issues such as pressure buildup and premature failure, especially when exposed to higher temperatures, and existing methods like oxygen reduction or scavengers are insufficient to prevent degradation.
Innovation Solution
Using a semi-permeable container top, such as a silicone bulb or stopper, to allow carbon dioxide venting during ascorbic acid degradation, thereby preventing excess pressure and package failure, while maintaining the impermeable nature of the container to prevent oxygen exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If air tight containers with impermeable materials are used to prevent oxygen from degrading ascorbic acid, then oxidation protection is improved, but carbon dioxide buildup causes package failure and foaming
Solution Approach 1:
The patent employs a semi-permeable membrane that allows carbon dioxide to pass through while blocking oxygen. This selective permeability resolves the contradiction by permitting the harmful byproduct (CO2) to escape while preventing the harmful reactant (O2) from entering and degrading the ascorbic acid.
Solution Approach 2:
The semi-permeable membrane acts as an intermediary between the ascorbic acid composition and the external environment. It selectively mediates gas exchange by allowing CO2 to pass through while blocking O2, thus resolving the contradiction between preventing oxidation and allowing CO2 venting.
2Object-affected harmful factors
If oxygen scavengers are added to prevent ascorbic acid degradation, then oxidation protection is improved, but carbon dioxide generation still causes package pressurization
Solution Approach 1:
The semi-permeable membrane serves as an intermediary that allows CO2 to escape from the package while preventing O2 from entering. This resolves the contradiction by providing a pathway for pressure relief without compromising the oxidation protection provided by oxygen scavengers.
Solution Approach 2:
The patent extracts the carbon dioxide gas from the package through the semi-permeable membrane, removing the harmful byproduct that causes pressurization while maintaining the internal environment protected from oxygen.
3Stability of the object's composition
If refrigeration is used to slow ascorbic acid degradation, then degradation rate is reduced, but shipping and storage complexity increases
Solution Approach 1:
The semi-permeable membrane package provides self-service by automatically regulating gas exchange without requiring external temperature control. The membrane passively allows CO2 to escape and O2 to be blocked, enabling the product to maintain stability during shipping and storage without refrigeration infrastructure.
Solution Approach 2:
The patent changes the permeability parameters of the packaging material to create a semi-permeable membrane with selective gas transmission properties. This parameter change allows the package to function without temperature control by inherently managing gas exchange based on molecular size and solubility differences between CO2 and O2.
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 semi-permeable container top effectively reduces carbon dioxide buildup, preventing package pressurization and extending the shelf life of ascorbic acid-containing compositions without significantly affecting the degradation rate of ascorbic acid, thus maintaining product integrity and usability.
Implementation Method 1
packaging the composition in a container having a semi-permeable container top
Data Source
AI summary
The invention is a method of venting the degradation products of an ascorbic acid containing composition. This prevents a build-up of carbon dioxide and may prolong the life of the packaging. The packaging includes an impermeable container and a semi-permeable top, which allows carbon dioxide to vent over time. When the composition includes water, the surface area of semi-permeable material contacting the composition is reduced to lessen water vapor loss.