Clay Film with Oriented Layers for High-Temperature Barrier
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Solution Overview
Problem
Current technologies lack a self-supporting clay film with highly oriented layers of clay particles that offers mechanical strength, flexibility, and high thermal stability, particularly at temperatures above 350°C, while also providing excellent gas and liquid barrier properties.
Innovation Solution
A clay film composed of natural or synthetic clay with a small amount of additives, such as epsilon-caprolactam, dextrin, or polyhydric phenols, is created using a method involving a uniform dilute clay dispersion that is allowed to precipitate and then formed into a film using solid-liquid separation methods, resulting in a film with highly oriented layers and a gas permeation coefficient of less than 3.2×10−11 cm2s−1cmHg−1.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If organic polymer materials are used to make gaskets, then flexibility is improved, but heat resistance deteriorates (highest about 350°C)
Solution Approach 1:
The patent creates a composite material combining organic polymer binder with inorganic clay particles (montmorillonite, hectorite, saponite, or palygorskite) to achieve both flexibility from the polymer and heat resistance above 350°C from the inorganic clay structure, resolving the contradiction between organic material flexibility and thermal stability
2Temperature
If metal gaskets are used, then heat resistance is improved, but flexibility deteriorates
Solution Approach 1:
The patent combines metal-free inorganic clay particles with organic polymer binder to create a composite that achieves heat resistance comparable to metal gaskets while maintaining the flexibility characteristic of organic materials, eliminating the need for metal components
3Reliability
If aluminum foil or vapor deposited aluminum films are used, then gas barrier performance is improved, but transparency deteriorates and flexibility is reduced
Solution Approach 1:
The patent creates a thin film structure with clay particles dispersed in a polymer binder that provides excellent gas barrier performance comparable to aluminum foil while maintaining flexibility and enabling transparency, allowing the film to be wrapped around threaded components and tubes
Solution Approach 2:
The composite of inorganic clay particles and organic polymer creates a material that achieves metal-level gas barrier properties without the drawbacks of metal foils, providing both transparency and flexibility
4Illumination intensity
If vapor deposited silica films are used, then transparency and gas barrier performance are improved, but heat resistance deteriorates (cannot be used over 350°C)
Solution Approach 1:
The patent replaces the organic compound base in vapor deposited silica films with an inorganic clay-polymer composite that can withstand temperatures above 350°C, achieving heat resistance comparable to or exceeding metal materials while maintaining transparency and gas barrier performance
5Temperature
If clay is added as filler to nylon resin, then thermal deformation temperature is improved, but blending difficulty increases when nylon resin accounts for less than 35 wt %
Solution Approach 1:
The patent changes the parameter of clay particle morphology to platelet-shaped particles with specific aspect ratios and controls their dispersion state, enabling effective blending and distribution in nylon resin compositions with lower polymer content (less than 35 wt %) while achieving the desired thermal deformation temperature improvement
6Strength
If fibrous clay mineral is added to nylon monomer, then rigidity and impact resistance are improved, but contact between nylon monomer particles decreases and molecular weight lowers when clay exceeds 30 weight parts per 100 weight parts
Solution Approach 1:
The patent transitions from fibrous clay to platelet-shaped clay particles, which provide localized reinforcement at particle interfaces while maintaining better distribution and contact between nylon monomer particles, achieving rigidity and impact resistance improvement without excessive clay content (avoiding the 30 weight parts threshold problem)
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 film exhibits excellent mechanical strength, flexibility, and thermal stability, maintaining its barrier properties up to 600°C, with a gas permeation coefficient of less than 3.2×10−11 cm2s−1cmHg−1 and a water permeation coefficient of 2×10−10 cm s−1, making it suitable for high-temperature applications as a self-supporting gasket or protective film.
Implementation Method 1
a uniform dilute clay dispersion which is allowed to precipitate and then formed into a film using solid-liquid separation methods
Implementation Method 2
a uniform dilute clay dispersion which is allowed to precipitate
Implementation Method 3
having a gas permeation coefficient of less than 3.2×10−11 cm2s−1cmHg−1
Implementation Method 4
maintaining its barrier properties up to 600°C, with a gas permeation coefficient of less than 3.2×10−11 cm2s−1cmHg−1
Data Source
AI summary
The present invention provides a clay film with excellent flexibility, whose main component is natural clay or synthetic clay, and in which there is uniform orientation in the clay particle layer, and relates to a novel clay film that has enough mechanical strength to be used as a self-supporting film, and has a structure in which layers of clay particles are highly oriented, and in which the main constituent component of the clay film is mica, vermiculite, montmorillonite, iron montmorillonite, beidellite, saponite, hectorite, stevensite, or nontronite, and which has excellent flexibility, undergoes no structural change at high temperatures of 250° C. and up to 600° C., contains no pinholes, and has a gas permeation coefficient of less than 3.2×10−11 cm2s−1cmHg−1 at room temperature for helium, hydrogen, oxygen, nitrogen, or air.