Ionically self-assembled carboxymethyl cellulose/surfactant complexes for antistatic paper coatings

Area of Science:

• Materials Science
• Surface Chemistry
• Polymer Science

Background:

• Paper products require tailored electrical properties for antistatic applications.
• Controlling surface resistance is crucial for preventing electrostatic discharge.

Purpose of the Study:

• To develop a facile method for tailoring the electrical surface resistance of paper.
• To investigate the potential of ionically self-assembled polyelectrolyte/surfactant complexes for antistatic paper coatings.

Main Methods:

• Ionic complexation of anionic carboxymethyl cellulose (CMC) with cationic alkyltrimethylammonium chloride (C(n)TAC) surfactants (n=12, 14, 16).
• Characterization of self-assembly using small-angle X-ray scattering.
• Measurement of electrical conductivity via AC-impedance analysis under controlled humidity.
• Application testing using flexographic printing and spray coating.

Main Results:

• Self-assembled complexes achieved conductivity of approximately 10(-5) S/cm at 50% RH.
• Surface sheet resistances of approximately 10(9) Omega were reached using printing and spray coating methods.
• Effective antistatic properties were demonstrated for paper coatings.

Conclusions:

• Ionically self-assembled polyelectrolyte/surfactant complexes provide a viable route to antistatic paper.
• The conductivity achieved is potentially due to protonic conductivity.
• Further development of these materials and processes is suggested for practical antistatic paper applications.