Fabrication of superhydrophobic cellulose-based materials through a solution-immersion process

Area of Science:

• Materials Science
• Surface Chemistry
• Nanotechnology

Background:

• Cellulose-based materials (cotton, paper) are typically hydrophilic.
• Developing durable superhydrophobic surfaces is crucial for advanced material applications.
• Existing methods for superhydrophobic coatings can be complex or lack durability.

Purpose of the Study:

• To develop an efficient and scalable method for creating superhydrophobic surfaces on cellulose materials.
• To investigate the surface chemistry and morphology of the resulting superhydrophobic coatings.
• To evaluate the durability and transparency of the fabricated superhydrophobic cellulose.

Main Methods:

• Solution-immersion of cellulose materials in potassium methyl siliconate (PMS) aqueous solution.
• Utilizing hydrogen bond assembly and polycondensation for coating formation.
• Characterization using FTIR, thermogravimetry, XPS, FESEM, AFM, and contact angle measurements.

Main Results:

• Successfully fabricated superhydrophobic surfaces on cellulose with a water contact angle of 157 degrees.
• Nanoscale roughness protuberances uniformly covered the surface, confirmed by FESEM and AFM.
• The coatings exhibited excellent chemical and mechanical durability and maintained the original color and morphology of the fabric.

Conclusions:

• The PMS-based method provides an effective route to transform hydrophilic cellulose into superhydrophobic materials.
• The process is simple, uses readily available materials, and is suitable for mass production.
• The resulting superhydrophobic cellulose materials possess desirable properties for various industrial applications.