Charge Matters: Electrostatic Complexation As a Green Approach to Assemble Advanced Functional Materials.

Area of Science:

• Colloid and Surface Chemistry
• Materials Science
• Polymer Science

Background:

• Traditional material assemblies rely on hydrophobic or chemical interactions, limiting their functionality and reversibility.
• Electrostatically complexed materials offer advanced properties not achievable through conventional methods.

Purpose of the Study:

• To introduce the fundamentals of electrostatic complexation between oppositely charged polyelectrolytes and colloidal particles.
• To explore conditions influencing complexation, such as ionic strength, pH, and hydration.
• To highlight the development of advanced material functions including self-healing and underwater adhesion.

Main Methods:

• Detailed examination of electrostatic association principles.
• Analysis of environmental factors (ionic strength, pH, hydration) controlling complexation.
• Review of state-of-the-art applications and material properties.

Main Results:

• Electrostatically complexed materials exhibit unique, advanced functions.
• Control over material properties is achieved by tuning complexation conditions.
• Reversible systems are formed, contrasting with irreversible hydrophobic/chemical assemblies.

Conclusions:

• Electrostatic complexation provides a versatile platform for designing advanced functional materials.
• The field encompasses applications from biomolecules to salt-controlled rheology and interfacial spinning.
• Future outlook emphasizes colloidal chemistry principles for electrostatic complexation.