Superhydrophobic and water repellent of all-cellulose composite (ACC) treated with HDTMS/SiO2

• Main Authors: Nor, S. S. Md, Salleh, M. Mat
• Format: Conference Proceeding
• Language: English
• Subjects: Cellulose; Contact angle; Hydrophobic surfaces; Hydrophobicity; Hydroxyl groups; Optical properties; Rayon; Silicon dioxide; Solvents
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0184884

All-cellulose composite (ACC) consists of cellulose for both reinforced and matrix phases. ACC has good mechanical, thermal and optical properties due to the compatibility of fiber and matrix phases. However, ACC can change its physical structure and lose strength in the presence of moisture due to abundant hydroxyl group in the cellulose molecules that make ACC hydrophilic. In this present study, the ACC was fabricated by using solvent infusion processing (SIP) from rayon textile. The NaOH/urea was used as the solvent to partially dissolve the cellulose. Then, ACC was treated with hexadecyltrimethoxysilane (HDTMS)/silica (SiO2) to produce superhydrophobic surface of ACC. The FTIR spectra of HDTMS/SiO2 treated ACC showed the new peak appears at 2841 cm−1 and 800 cm−1 that attributed to -CH2 stretching and Si-O-CH3 vibrations, respectively. The surface morphology of HDTMS/SiO2 treated ACC was rougher compared to untreated ACC. Furthermore, the HDTMS/SiO2 treated ACC exhibited superhydrophobic with water contact angle beyond 157°.