Hydroxide-ion-conductive gas barrier films based on layered double hydroxide/polysulfone multilayers

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Achieving simultaneous gas barrier and ion conductivity in films is challenging.
• Layered double hydroxides (LDH) offer potential for ionic conduction and barrier properties.
• Quaternary ammonium grafted polysulfone (QAPSF) provides an ion-conductive polymer matrix.

Purpose of the Study:

• To fabricate a dual-functional organic-inorganic film.
• To achieve both gas barrier and hydroxide ion conductivity properties.
• To overcome the incompatibility between gas blocking and ionic conduction.

Main Methods:

• Layer-by-layer assembly technique was employed.
• Inorganic layered double hydroxide (LDH) nanoplates were used.
• Quaternary ammonium grafted polysulfone (QAPSF) served as the polymer matrix.

Main Results:

• A film with both gas barrier and hydroxide ion conductivity was successfully fabricated.
• The composite film demonstrated high ionic conductivity.
• The film exhibited excellent gas barrier performance.
• The study successfully integrated incompatible properties.

Conclusions:

• The developed organic-inorganic film exhibits promising dual functionality.
• This approach provides a new strategy for designing advanced functional materials.
• The material shows potential for applications requiring both gas barrier and ion conduction.