title: Fabrication of bacterial cellulose/polyaniline/single-walled carbon nanotubes membrane for potential application as biosensor.
abstract: Electrically conductive polymeric membranes of BC with polyaniline (PAni) were fabricated through ex situ oxidative polymerization. PAni was densely arrayed along BC fibers and SWCNTs were uniformly distributed in the composites as confirmed by field emission scanning electron microscopy (FE-SEM). Fourier transform-infrared (FT-IR) spectra of the composite membranes exhibited characteristic peaks for specific functional groups of PAni and SWCNTs besides BC. X-ray diffraction (XRD) analysis indicated the presence of specific peaks for BC, PAni, and SWCNTs in the composites. The conjugated backbone of PAni and SWCNTs contributed to improve the degradation temperatures from 232°C for BC to 260°C, 302°C, and 310°C for BC-PAni, BC-PAni/SWCNTs-I (0.05mg/mL), and BC-PAni/SWCNTs-II (0.1mg/mL) composites, respectively. The electrical conductivity of BC was enhanced to 1.04×10-3S/cm, 4.64×10-3S/cm, and 1.41×10-2S/cm upon doping with PAni, and 0.05mg/mL and 0.1mg/mL SWCNTs, respectively in dry state which was further increased to 4.02×10-2S/cm, 3.03×10-2S/cm, 5.93×10-1S/cm, and 7.36×10-1S/cm, respectively in PBS solution. These membranes can potentially be used for applications requiring biocompatibility and electrical conductivity such as biological and chemical sensors.
authors.affiliation: Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Ashwak
authors.initials: A
authors.lastname: Jasim
authors.affiliation: Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Muhammad Wajid
authors.initials: MW
authors.lastname: Ullah
authors.affiliation: Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Lin
authors.affiliation: Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China. Electronic address: yang_sunny@yahoo.com.
authors.forename: Guang
authors.initials: G
authors.lastname: Yang
mesh_terms: D000814:Aniline Compounds / Q000138:chemical synthesis*; D015374:Biosensing Techniques; D002482:Cellulose / Q000138:chemical synthesis*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000814:Aniline Compounds; D037742:Nanotubes, Carbon; C416807:polyaniline; D002482:Cellulose
keywords: Bacterial cellulose; Biosensors; Conducting composites; Polyaniline; Single-walled carbon nanotubes