Characterization of compressed bacterial cellulose nanopaper film after exposure to dry and humid conditions

• Main Authors: Abral, Hairul, Chairani, Melati Krista, Rizki, Muhammad Dinul, Mahardika, Melbi, Dian Handayani, Dian Handayani, Eni Sugiarti, Eni Sugiarti, Muslimin, Ahmad Novi, Sapuan, S. M., Ilyas, R. A.
• Format: Article
• Language: English
• Published: Elsevier Editora Ltda 2021
• Subjects: TP Chemical technology
• Online Access: http://eprints.utm.my/id/eprint/94632/1/AhmadIlyasRushdan2021_CharacterizationOfCompressedBacterialCelluloseNanopaper.pdf; http://eprints.utm.my/id/eprint/94632/; http://dx.doi.org/10.1016/j.jmrt.2021.01.057

This work investigates the effects of two different levels of humidity (RH 50% and 75%) on the characterizations of compressed bacterial cellulose nanopaper film. The film was prepared with different heat treatments; compression at 25 °C for 72 h and then at 100 °C for 24, 72 or 120 h. Maximum tensile strength (250.7 MPa) and tensile modulus (18.6 GPa) were measured on the film treated at 100 °C for 120 h and RH 50%. However, tensile strength and tensile modulus dropped by 53.6% and 75.8% respectively and elongation at break increased by 32% when this film was stored in more humid conditions (RH 75%). FTIR spectra and XRD patterns indicate changes of the deformed chain structure of the cellulose as more water was incorporated between the layers of the lattice after exposure to humidity.