Zeolite-Polymer Composite for Moisture Absorption in Electronics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices often suffer from moisture ingress due to design vulnerabilities, leading to condensation issues that impair or fail circuit components, and existing moisture filters and absorbers prove unsatisfactory, especially under temperature changes.
Innovation Solution
A composite material comprising a polymer matrix with at least 50% zeolite bound within, using fluoroplastics like PTFE or PVDF, and a specific zeolite structure, designed to effectively absorb moisture while maintaining mechanical stability and low density, integrated into the device's housing to prevent condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional moisture absorbers are used in the housing, then moisture can be absorbed to some extent, but they prove unsatisfactory for long-term use especially under temperature changes
Solution Approach 1:
The patent applies composite materials by combining zeolite particles (moisture-absorbing component) with a polymer matrix (structural component) to create a composite molding that integrates both mechanical stability and moisture absorption functionality. This composite structure resolves the contradiction by providing a material that maintains its properties across temperature changes while effectively absorbing moisture over the long term.
Solution Approach 2:
The patent employs parameter changes by optimizing the volume fraction of zeolite (at least 50% by volume) and selecting specific polymers with appropriate glass transition temperatures. This parameter optimization ensures the composite material maintains structural integrity while achieving superior moisture absorption performance under varying temperature conditions.
2Reliability
If a high volume fraction of zeolite is used to improve moisture absorption, then moisture protection is enhanced, but the mechanical strength may be compromised
Solution Approach 1:
The composite material structure allows high zeolite content (≥50% by volume) to be incorporated while maintaining mechanical strength through the polymer matrix framework. The matrix acts as a binding phase that holds the zeolite particles together, preventing strength loss despite the high porosity required for moisture absorption.
Solution Approach 2:
The patent applies local quality by distributing zeolite particles throughout the polymer matrix in a heterogeneous composite structure. This allows regions of high moisture absorption activity (zeolite particles) to be embedded within a continuous matrix phase that provides mechanical strength, optimizing both functions locally and globally.
3Strength
If a dense structure is used to improve mechanical strength, then strength is improved, but the moisture absorption capacity is reduced
Solution Approach 1:
The composite material creates a hierarchical structure where the polymer matrix provides the dense structural framework for mechanical strength, while the embedded zeolite particles create internal porosity and channels for moisture absorption. This multi-scale composite architecture resolves the contradiction between density and absorption capacity.
Solution Approach 2:
The patent utilizes porous materials by incorporating zeolite particles with inherent microporous structures into the composite. These pores provide extensive surface area and capillary channels for moisture absorption while the external composite structure maintains mechanical integrity through the polymer matrix reinforcement.
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 composite material effectively absorbs moisture, preventing condensation on electronic components over long-term use and across varying temperatures, enhancing the reliability of devices like pressure transmitters and other sensitive electronics.
Implementation Method 1
the zeolite comprises a group of substances based on aluminosilicate with a structure of zeolite type A, in particular a zeolite 4A or a zeolite 3A
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A composite material comprises a polymer matrix; and zeolite bound within the polymer matrix; where the proportion by volume of the zeolite in the volume of the composite material is at least 50%, especially at least 65%. The polymer matrix may especially comprise a polymer selected from a group of polymers consisting of fluoropolymers, polyaryl ether ketones, sulphur polymers and polymers of high heat resistance. The zeolite comprises especially a type A zeolite, especially a 4A or 3A zeolite.