Semipermeable Membrane with Photoactive Layer for Oil-Water Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing water treatment technologies face challenges in efficiently separating oil and water while also effectively decomposing pollutants, often requiring complex systems and lengthy processes.
Innovation Solution
A semipermeable membrane for water treatment is developed, incorporating a photoactive layer with one-dimensional nano structure bundles that exhibit hydrophobicity, allowing for the separation of oil and water while also photodegrading pollutants upon irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical separation methods using difference in specific gravities are used to separate oil and water, then oil and water can be separated, but it takes a long time and the separation is not complete
Solution Approach 1:
The patent employs a semipermeable membrane with specific pore size and structure to separate oil and water. The membrane allows water molecules to pass through while blocking oil molecules, achieving complete and rapid separation without relying on slow gravitational settling. The porous structure enables simultaneous separation of multiple phases based on molecular size differences.
Solution Approach 2:
The invention uses a composite membrane structure combining hydrophilic and hydrophobic regions, or multiple functional layers, to enhance separation performance. This composite approach allows the membrane to selectively interact with different components (water vs. oil) through combined mechanisms of size exclusion, hydrophilic/hydrophobic effects, and surface properties, achieving both speed and completeness.
2Reliability
If heating or chemical treatment methods are used to increase specific gravity difference for separation, then separation can be achieved, but secondary pollution occurs and reuse of separated materials is difficult
Solution Approach 1:
The patent replaces thermal and chemical separation methods with a mechanical filtration approach using a semipermeable membrane. The membrane physically filters oil and water based on molecular size and interaction properties, eliminating the need for heating or chemical additives that cause secondary pollution. The separated materials remain in their original state, enabling easy reuse.
Solution Approach 2:
The semipermeable membrane performs separation through its inherent structural properties (pore size, surface chemistry) without requiring external energy input or chemical assistants. The membrane's own characteristics enable selective permeation, making the process self-sufficient and free from polluting side effects associated with external reagents or energy-intensive heating.
3Device complexity
If simple filtration membranes are used for separation, then the structure is simple, but the membrane lacks photodegradation capability to decompose pollutants
Solution Approach 1:
The patent combines separation and photodegradation functions into a single integrated membrane system. The membrane incorporates photocatalytic materials (such as TiO2 nanoparticles) within its structure, allowing it to simultaneously filter pollutants through physical separation and decompose organic contaminants through light-induced photocatalysis. This merging eliminates the need for separate treatment stages while maintaining structural simplicity.
Solution Approach 2:
The invention creates a composite membrane by incorporating photocatalytic particles, carbon nanotubes, or other functional materials into the membrane matrix. This composite structure provides both the filtration function of the base membrane and the photodegradation function of the embedded materials, achieving multiple functions without significantly increasing overall system complexity.
4Object-generated harmful factors
If multiple separate treatment processes are used for separation and pollutant decomposition, then both functions can be achieved, but the system complexity increases
Solution Approach 1:
The patent designs a universal semipermeable membrane that performs multiple functions: physical separation of oil and water, filtration of suspended particles, and photodegradation of dissolved organic pollutants. This multi-functional membrane replaces what would traditionally require separate filtration systems, chemical treatment units, and photoreactors, significantly simplifying the overall treatment system while maintaining comprehensive pollutant removal effectiveness.
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 effectively separates oil from water and decomposes pollutants, simplifying the treatment process and improving efficiency compared to traditional methods, while also potentially reducing secondary pollution.
Implementation Method 1
the one-dimensional nano structure is nano-structured so that a surface of the semipermeable membrane for water treatment has a hydrophobicity
Implementation Method 2
a technology for separating oil and water using a separation membrane and a filter which use a selective permeability of water and oil
Implementation Method 3
light may be irradiated onto the photoactive layer to allow the photoactive layer to have photodegradation property
Implementation Method 4
the one-dimensional nano structures may be bonded to each other by the Van der Waals force
Data Source
AI summary
The present disclosure relates to a semipermeable membrane for water treatment, including a photoactive layer. The photoactive layer includes a plurality of one-dimensional nano structure bundles and the one-dimensional nano structure is nano-structured so that a surface of the semipermeable membrane for water treatment has a hydrophobicity.