Reverse Osmosis Membrane Interlayer Bonding Durability
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Solution Overview
Problem
Conventional reverse osmosis membranes suffer from peeling of the polymer support layer during osmotic processes, leading to reduced salt rejection rate, permeate flow rate, and shortened lifespan, necessitating frequent maintenance.
Innovation Solution
A reverse osmosis membrane with a porous support, polymer support layer, and hydrophilic selective layer are sequentially laminated, with specific adhesive forces between layers to maintain interlayer bonding, ensuring durability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reverse osmosis membrane structure is used, then manufacturing simplicity is maintained, but polymer support layer peeling occurs during operation reducing durability
Solution Approach 1:
The patent applies composite materials by combining porous support with polymer support layer and selective layer in a multi-layer structure. The porous support provides mechanical strength while the polymer layers provide separation function, creating a composite structure that prevents peeling and enhances durability without excessive complexity.
Solution Approach 2:
The membrane is segmented into distinct functional layers: porous support layer, polymer support layer, and selective layer. Each layer performs a specific function, with the porous support providing structural integrity and the polymer layers providing separation functionality, preventing peeling through proper layer segmentation and bonding.
2Duration of action of stationary object
If polymer support layer peeling is prevented, then membrane lifespan is extended, but interlayer bonding strength must be optimized
Solution Approach 1:
The patent optimizes interlayer bonding strength by controlling parameters such as adhesive layer thickness, bonding pressure, and temperature during manufacturing. These parameter adjustments ensure strong interlayer bonding that prevents peeling during operation while maintaining membrane lifespan without excessive bonding strength requirements.
3Productivity
If backwashing is performed to clean membrane, then fouling is removed, but peeling occurs reducing cleaning effectiveness
Solution Approach 1:
The patent applies beforehand cushioning by pre-establishing strong interlayer bonding through optimized adhesive layers and bonding parameters before backwashing occurs. This preventive measure cushions against the mechanical stress of backwashing, preventing peeling while allowing effective cleaning operation to proceed.
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 membrane maintains flow rate and extends lifespan while reducing maintenance costs by minimizing peeling and enhancing cleaning effectiveness.
Implementation Method 1
a porous support, a polymer support layer, and a hydrophilic selective layer are sequentially laminated
Implementation Method 2
reverse osmosis membrane
Data Source
AI summary
The present invention relates to a reverse osmosis membrane and a method of preparing the same, and more particularly to a high durability reverse osmosis membrane which is excellent in interlayer bonding in a separation membrane while maintaining an equal flow rate as compared with a conventional reverse osmosis membrane to minimize a reduction in durability in the membrane upon backwashing to enhance a cleaning effect, prolong the life of a high-pressure membrane, maximize the amount of accumulated treated water, and reduce maintenance costs, and a method of preparing the same.