Thermo and pH dual-responsive materials for controllable oil/water separation

Area of Science:

• Materials Science
• Polymer Chemistry
• Environmental Engineering

Background:

• Oil/water separation is crucial for environmental remediation and industrial processes.
• Developing smart materials with tunable properties for efficient separation remains a challenge.

Purpose of the Study:

• To fabricate and characterize a thermo- and pH-dual-controllable oil/water separation material.
• To demonstrate the selective separation of oil and water using the developed material.

Main Methods:

• Photo-initiated free radical polymerization of dimethylamino ethyl methacrylate (DMAEMA) to create PDMAEMA hydrogel.
• Coating a mesh with PDMAEMA hydrogel to impart superhydrophilicity and underwater superoleophobicity.
• Investigating the material's response to changes in temperature and pH for separation control.

Main Results:

• The PDMAEMA hydrogel coated mesh exhibits tunable superhydrophilicity and underwater superoleophobicity.
• Selective separation of water and oil is achieved by adjusting temperature (e.g., <55 °C) or pH (e.g., <13).
• The material allows controlled permeation of water or oil based on environmental stimuli, enabling in-situ collection.

Conclusions:

• A novel thermo- and pH-dual-controllable oil/water separation material was successfully fabricated.
• The material demonstrates intelligent and selective separation capabilities, offering potential for practical applications.
• This work opens new avenues for diversified and intelligent water/oil separation technologies.