Composite Separation Membrane Alkanolamine Adhesion Cross-Flow Peeling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inorganic separation membranes used for liquid treatment face challenges with durability, particularly in cross flow filtration methods, where the membrane can peel off due to the direction of liquid flow, and existing membranes lack both excellent liquid permeable and separation performance simultaneously.
Innovation Solution
A composite separation membrane is developed comprising a supporting base material with a complex layer containing oxidized metal nanosheets, graphene oxide, and alkanolamine, where the alkanolamine enhances the adhesiveness of the oxidized metal nanosheets and improves both liquid permeability and separation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cross flow filtration method is used to treat large scale liquid, then productivity is improved, but the separation membrane is easily peeled from the surface due to parallel flow direction
Solution Approach 1:
The patent uses a composite structure consisting of a supporting base material and a complex layer containing oxidized metal nanosheets, graphene oxide, and alkanolamine. This composite structure provides both the mechanical strength needed for cross-flow filtration and the adhesive properties to prevent peeling under parallel flow conditions.
Solution Approach 2:
The alkanolamine component acts as an intermediary substance that enhances adhesion between the oxidized metal nanosheets and the supporting base material. This intermediary layer prevents the complex layer from peeling off during cross-flow filtration operations.
2Measurement precision
If dead end filtration method is used, then separation performance is improved, but the membrane can only treat small amount of liquid and requires frequent replacement
Solution Approach 1:
The patent enables dynamic operation by allowing the membrane to switch between dead-end and cross-flow modes. The robust composite structure maintains separation performance in dead-end mode while withstanding the mechanical stresses of cross-flow mode for extended periods, enabling flexible adaptation to different treatment requirements.
3Ease of manufacture
If inorganic separation membrane is used for organic solvent treatment, then manufacturing cost is reduced and applicability is improved, but durability is insufficient
Solution Approach 1:
The patent employs a composite structure combining oxidized metal nanosheets with graphene oxide and alkanolamine on a supporting base material. This composite architecture provides enhanced chemical stability and mechanical durability for organic solvent treatment while maintaining cost-effectiveness through the use of inorganic materials.
Solution Approach 2:
The patent modifies the chemical parameters of the inorganic membrane by incorporating alkanolamine, which changes the surface properties and chemical resistance of the membrane. This parameter modification enables the membrane to withstand organic solvent environments while maintaining durability.
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 membrane exhibits improved durability and maintains high separation performance while maintaining liquid permeability, making it suitable for large-scale liquid treatment applications, including organic solvent treatment.
Implementation Method 1
the alkanolamine may play a role to bind at least the oxidized metal nanosheets
Implementation Method 2
a separation membrane having a fine pore size by which particles and polymers smaller than 2 nm can be rejected
Implementation Method 3
The surface of a nanofiltration membrane is charged to give an electrostatic separation effect
Implementation Method 4
a liquid permeable performance and a separation performance
Data Source
AI summary
The objective of the present invention is to provide a composite separation membrane which is excellent in not only a liquid permeable performance and a separation performance relatively but also a durability and which is particularly useful as a membrane for liquid treatment, and a method for treating a liquid by using the composite separation membrane. The composite separation membrane according to the present invention is characterized in comprising a supporting base material and a complex layer, wherein the complex layer is placed on the supporting base material, the complex layer comprises oxidized metal nanosheets, graphene oxide and an alkanolamine, and at least one of the alkanolamine is present between the oxidized metal nanosheets.