Hairul Abral, Melati Krista Chairani, Muhammad Dinul Rizki, Melbi Mahardika, Dian Handayani, Eni Sugiarti, Ahmad Novi Muslimin, S.M. Sapuan, R.A. Ilyas
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. © 2021 The Author(s).
Department of Mechanical Engineering, Andalas University, Padang, Sumatera Barat, 25163, Indonesia; Laboratory of Sumatran Biota, Faculty of Pharmacy, Andalas University, Padang, Sumatera Barat, 25163, Indonesia; Laboratory of High-Temperature Coating, Research Center for Physics Indonesian Institute of Sciences (LIPI) Serpong, Indonesia; Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor, 43400, Malaysia; Department of Biosystems Engineering, Institut Teknologi Sumatera, South Lampung, 35365, Indonesia; School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Johor Bahru, Johor, 81310, Malaysia
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