Absorption-Desorption Sheet with Polymer Matrix and Deliquescent Salt
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Solution Overview
Problem
Conventional dehumidifying agents, such as inorganic materials and salt-based dehumidifiers, face challenges with limited absorption capacity and difficulty in repeated use due to high heat requirements or deliquescence issues.
Innovation Solution
A composition for forming an absorption-desorption sheet comprising a polymerizable first monomer or oligomer with ionic hydrophilic groups, a polymerizable second monomer or oligomer with non-ionic hydrophilic groups, and a deliquescent salt, which are polymerized together to create a durable sheet that embeds the salt, enhancing absorption capacity and allowing for repeated use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inorganic dehumidifying agents (silica gel or zeolite) are used, then the material structure is stable, but the absorption capacity is insufficient and high heat is required for reuse
Solution Approach 1:
The patent uses a composite material system consisting of a polymer matrix (from polymerizable monomers/oligomers) combined with deliquescent salt particles. This composite structure provides both the structural stability of the polymer network and the high absorption capacity of the deliquescent salt, resolving the contradiction between material stability and absorption capacity.
2Quantity of substance
If salt-based dehumidifying agents (lithium chloride, calcium chloride, etc.) are used, then the absorption capacity is good, but deliquescence causes liquefaction and makes repeated use difficult
Solution Approach 1:
The patent embeds deliquescent salt particles within a polymer matrix that acts as a flexible shell or film structure. This polymer shell contains the salt and prevents uncontrolled deliquescence and salt loss, while still allowing the salt to absorb moisture effectively. The polymer network provides mechanical integrity that enables repeated use without salt dissolution or loss.
Solution Approach 2:
The patent changes the physical state and environmental parameters of the deliquescent salt by embedding it in a polymer matrix. This modification allows the salt to operate within a controlled parameter range where it can absorb moisture effectively without undergoing complete deliquescence that would cause salt loss and prevent reuse.
3Quantity of substance
If deliquescent salt is used alone, then the absorption capacity is high, but the salt may be lost or not fixed to a specific base
Solution Approach 1:
The patent creates a composite material where deliquescent salt particles are distributed and fixed within a polymer matrix. This composite structure provides both the high absorption capacity of the salt and the fixation stability of the polymer network, preventing salt loss while maintaining absorption performance.
Solution Approach 2:
The polymer matrix acts as an intermediary between the deliquescent salt and the external environment. It provides a stable base for the salt particles, fixing them in place while still allowing the salt to interact with moisture for absorption. The polymer intermediary prevents direct salt loss while enabling absorption function.
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 resulting absorption-desorption sheet exhibits improved durability and absorption capacity, maintaining performance across multiple cycles and preventing salt loss, with enhanced moisture management capabilities.
Implementation Method 1
a deliquescent salt... due to deliquescence, such dehumidifying agents may be liquefied after absorbing moisture
Implementation Method 2
a polymerizable first monomer or oligomer having an ionic hydrophilic group; a polymerizable second monomer or oligomer having a non-ionic hydrophilic group
Data Source
AI summary
Provided are a composition for forming an absorption-desorption sheet, an absorption-desorption sheet including the same, and a method of preparing the absorption-desorption sheet. The composition for forming an absorption-desorption sheet includes: a polymerizable first monomer or oligmer comprising an ionic hydrophilic group; a polymerizable second monomer or oligmer comprising a non-ionic hydrophilic group; and a deliquescent salt that has excellent absorption-desorption performance- and allows repeated use of the absorption-desorption sheet. In addition, the absorption-desorption sheet has antibacterial and deodorant performance, and thus, is able to inhibit the growth of bacteria and fungi in a humid environment.