Porous Structural Body Light-Resistant Protective Layer
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Solution Overview
Problem
Metal ions like silver, which are used for antibacterial and antimold properties, are prone to light-induced transformation, requiring special handling to prevent light exposure, making them difficult to handle and use effectively.
Innovation Solution
A structural body with a porous partition containing a function layer of metal ions that can be transformed by light, and a protective layer at the ends to prevent light exposure, where the protective layer is at least 0.4 times the length of the opening, reducing light intensity on the function layer and preventing its transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal ions (silver ions) are used to provide antibacterial/antimold properties and separation functionality, then the functional performance is improved, but the stability against light exposure deteriorates, requiring special handling to prevent light-induced transformation
Solution Approach 1:
The inner surface of the partition portion is divided into two distinct regions: a function layer containing metal ions for antibacterial/antimold properties and separation functionality, and a protective layer made of light-resistant material. This segmentation allows the functional and protective aspects to be spatially separated, enabling the metal ions to perform their function while being protected from light-induced transformation by the light-resistant protective layer.
Solution Approach 2:
A protective layer made of light-resistant material is introduced as an intermediary between the light source and the metal ions in the function layer. This protective layer acts as a shield that blocks or reduces light exposure to the metal ions, preventing their transformation while allowing the structural body to maintain its functional performance.
2Stability of the object's composition
If special handling is implemented to prevent light exposure, then the stability of metal ions is improved, but the ease of operation deteriorates due to complex handling requirements
Solution Approach 1:
The protective layer is pre-applied to the inner surface of the partition portion during manufacturing, creating a built-in light protection system. This preliminary action eliminates the need for special handling measures during use, as the structural body is already equipped with light-resistant protection, thereby improving ease of operation while maintaining metal ion stability.
Solution Approach 2:
The protective layer provides self-protection against light exposure, eliminating the need for external protective measures or special handling by the user. The structural body is designed to protect itself from light-induced transformation of metal ions through the integrated protective layer, simplifying operation and maintenance.
3Stability of the object's composition
If the protective layer is made thicker to better block light, then the protection against light-induced transformation is improved, but the device complexity increases due to additional material and manufacturing steps
Solution Approach 1:
The protective layer is applied specifically to the inner surface of the partition portion where light exposure occurs, rather than uniformly throughout the entire structural body. This localized application provides effective light protection where needed while minimizing the amount of additional material and manufacturing complexity.
Solution Approach 2:
The structural body is designed as a composite structure combining the partition portion (providing mechanical support and flow path) with the protective layer (providing light resistance). This composite approach integrates multiple functions into a single unified structure, avoiding the need for separate protective components and reducing overall device complexity.
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 configuration allows for the use of metal ions without special handling to prevent light exposure, maintaining their functionality while reducing the risk of light-induced transformation, thus providing an easy-to-handle structural body for applications like air and water cleaning and separation.
Implementation Method 1
the protective layer which is provided at each end portion of the inside surface of the partition portion and which is not transformed by light... light is not likely to reach deep inside of the cell
Data Source
AI summary
A structural body 10 includes a porous partition portion 14 forming a plurality of cells 12 each of which is used as a flow path of a mixed gas as a fluid; a function layer 16 provided on each inside surface 15 of the partition portion 14; a protective layer 18 provided on each inside surface end portion 15a of the inside surface 15; and a sealing portion 19 provided on each end surface 17 of the partition portion 14. The function layer 16 contains metal ions, and is transformed by light. The protective layer 18 is a length B (mm) from an end surface 11 of the structural body 10 and a maximum length A (mm) of an opening of the cell 12 satisfy the relationship of B/A≥0.4.