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Bacterial Cellulose

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Hanseung Yang – 1st expert on this subject based on the ideXlab platform

  • Polymerization of Aniline on Bacterial Cellulose and Characterization of Bacterial Cellulose/Polyaniline Nanocomposite Films
    Current Applied Physics, 2020
    Co-Authors: Hanseung Yang

    Abstract:

    Abstract Bacterial Cellulose/polyaniline nanocomposite film was prepared by the chemical oxidative polymerization of aniline with Bacterial Cellulose. Polyaniline conducting polymer nanocomposite films with Bacterial Cellulose fibers was prepared and characterized. In nanocomposite film, the Bacterial Cellulose was fully encapsulated with polyaniline by direct polymerization of the respective monomers using the oxidant and dopant. These Bacterial Cellulose/polyaniline nanocomposite films materials exhibited the inherent properties of both components. The deposition of a polyaniline on the Bacterial Cellulose surface was characterized by SEM. XPS revealed a higher doping level of the nanocomposite films doped with p-TSA dopant. From the cyclic voltammetry results, the polyaniline polymer was thermodynamically stable because redox peaks of electrochemical transitions in the voltagrams were maintained in Bacterial Cellulose/polyaniline nanocomposite films.

  • polymerization of aniline on Bacterial Cellulose and characterization of Bacterial Cellulose polyaniline nanocomposite films
    Current Applied Physics, 2012
    Co-Authors: Hanseung Yang

    Abstract:

    Abstract Bacterial Cellulose/polyaniline nanocomposite film was prepared by the chemical oxidative polymerization of aniline with Bacterial Cellulose. Polyaniline conducting polymer nanocomposite films with Bacterial Cellulose fibers was prepared and characterized. In nanocomposite film, the Bacterial Cellulose was fully encapsulated with polyaniline by direct polymerization of the respective monomers using the oxidant and dopant. These Bacterial Cellulose/polyaniline nanocomposite films materials exhibited the inherent properties of both components. The deposition of a polyaniline on the Bacterial Cellulose surface was characterized by SEM. XPS revealed a higher doping level of the nanocomposite films doped with p-TSA dopant. From the cyclic voltammetry results, the polyaniline polymer was thermodynamically stable because redox peaks of electrochemical transitions in the voltagrams were maintained in Bacterial Cellulose/polyaniline nanocomposite films.

Il-kwon Oh – 2nd expert on this subject based on the ideXlab platform

  • Electro-active hybrid actuators based on freeze-dried Bacterial Cellulose and PEDOT:PSS
    Smart Materials and Structures, 2013
    Co-Authors: Si-Seup Kim, Jin Han Jeon, Chang Doo Kee, Il-kwon Oh

    Abstract:

    We report a high-performance electro-active hybrid actuator based on freeze-dried Bacterial Cellulose and conducting polymer electrodes. The freeze-dried Bacterial Cellulose, which has a sponge form, can absorb a much greater amount of ionic liquid, which is a prerequisite for dry-type and high-performance electro-active polymers. In addition, the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) conducting layers are deposited on the top and bottom surfaces of the freeze-dried Bacterial Cellulose using a simple dipping and drying method. The results show that the freeze-dried Bacterial Cellulose actuator with conducting polymer electrodes has a much larger tip displacement under electrical stimuli than pure Bacterial Cellulose actuators with metallic electrodes. The large bending displacement of the freeze-dried Bacterial Cellulose actuator under low input voltage is due to the synergistic effects of the ion migration of the dissociated ionic liquids inside the Bacterial Cellulose and the electrochemical doping processes of the PEDOT: PSS electrode layers.

  • Bacterial Cellulose actuator with electrically driven bending deformation in hydrated condition
    Sensors and Actuators B-chemical, 2010
    Co-Authors: Jin Han Jeon, Il-kwon Oh

    Abstract:

    An electro-active biopolymer actuator based on the Bacterial Cellulose was newly developed to be activated in the wet environment for biomedical applications. When Bacterial Cellulose (BC) membranes with biocompatibility and biodegradability were electrically activated under fully hydrated condition, the bending deformations were observed for both step and harmonic electrical input signals. The LiCl treated Bacterial Cellulose was used to improve the bending actuation performance due to much larger ion migration. XRD, TGA, DSC, tensile test, IEC and ionic conductivity of the LiCl treated Bacterial Cellulose were compared with those of pristine Bacterial Cellulose. The electromechanical performances of LiCl treated BC show much large bending deformation because of its lower stiffness and higher ionic exchange capacity through the proper control of crystallinity. Also, the surface modification that affects the adhesion between the gold electrode and the Bacterial Cellulose surface was observed in the SEM images after LiCl treatment. Present results show that the Bacterial Cellulose actuator can be a promising smart material that may possibly be used in the wet environment of diverse biomedical applications.

  • Bacterial Cellulose actuator with electrically driven bending deformation in hydrated condition
    Sensors and Actuators B: Chemical, 2010
    Co-Authors: Jin Han Jeon, Il-kwon Oh, Chang Doo Kee, Seong Jun Kim

    Abstract:

    An electro-active biopolymer actuator based on the Bacterial Cellulose was newly developed to be activated in the wet environment for biomedical applications. When Bacterial Cellulose (BC) membranes with biocompatibility and biodegradability were electrically activated under fully hydrated condition, the bending deformations were observed for both step and harmonic electrical input signals. The LiCl treated Bacterial Cellulose was used to improve the bending actuation performance due to much larger ion migration. XRD, TGA, DSC, tensile test, IEC and ionic conductivity of the LiCl treated Bacterial Cellulose were compared with those of pristine Bacterial Cellulose. The electromechanical performances of LiCl treated BC show much large bending deformation because of its lower stiffness and higher ionic exchange capacity through the proper control of crystallinity. Also, the surface modification that affects the adhesion between the gold electrode and the Bacterial Cellulose surface was observed in the SEM images after LiCl treatment. Present results show that the Bacterial Cellulose actuator can be a promising smart material that may possibly be used in the wet environment of diverse biomedical applications. © 2010 Elsevier B.V. All rights reserved.

Jin Han Jeon – 3rd expert on this subject based on the ideXlab platform

  • Electro-active hybrid actuators based on freeze-dried Bacterial Cellulose and PEDOT:PSS
    Smart Materials and Structures, 2013
    Co-Authors: Si-Seup Kim, Jin Han Jeon, Chang Doo Kee, Il-kwon Oh

    Abstract:

    We report a high-performance electro-active hybrid actuator based on freeze-dried Bacterial Cellulose and conducting polymer electrodes. The freeze-dried Bacterial Cellulose, which has a sponge form, can absorb a much greater amount of ionic liquid, which is a prerequisite for dry-type and high-performance electro-active polymers. In addition, the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) conducting layers are deposited on the top and bottom surfaces of the freeze-dried Bacterial Cellulose using a simple dipping and drying method. The results show that the freeze-dried Bacterial Cellulose actuator with conducting polymer electrodes has a much larger tip displacement under electrical stimuli than pure Bacterial Cellulose actuators with metallic electrodes. The large bending displacement of the freeze-dried Bacterial Cellulose actuator under low input voltage is due to the synergistic effects of the ion migration of the dissociated ionic liquids inside the Bacterial Cellulose and the electrochemical doping processes of the PEDOT: PSS electrode layers.

  • Bacterial Cellulose actuator with electrically driven bending deformation in hydrated condition
    Sensors and Actuators B-chemical, 2010
    Co-Authors: Jin Han Jeon, Il-kwon Oh

    Abstract:

    An electro-active biopolymer actuator based on the Bacterial Cellulose was newly developed to be activated in the wet environment for biomedical applications. When Bacterial Cellulose (BC) membranes with biocompatibility and biodegradability were electrically activated under fully hydrated condition, the bending deformations were observed for both step and harmonic electrical input signals. The LiCl treated Bacterial Cellulose was used to improve the bending actuation performance due to much larger ion migration. XRD, TGA, DSC, tensile test, IEC and ionic conductivity of the LiCl treated Bacterial Cellulose were compared with those of pristine Bacterial Cellulose. The electromechanical performances of LiCl treated BC show much large bending deformation because of its lower stiffness and higher ionic exchange capacity through the proper control of crystallinity. Also, the surface modification that affects the adhesion between the gold electrode and the Bacterial Cellulose surface was observed in the SEM images after LiCl treatment. Present results show that the Bacterial Cellulose actuator can be a promising smart material that may possibly be used in the wet environment of diverse biomedical applications.

  • Bacterial Cellulose actuator with electrically driven bending deformation in hydrated condition
    Sensors and Actuators B: Chemical, 2010
    Co-Authors: Jin Han Jeon, Il-kwon Oh, Chang Doo Kee, Seong Jun Kim

    Abstract:

    An electro-active biopolymer actuator based on the Bacterial Cellulose was newly developed to be activated in the wet environment for biomedical applications. When Bacterial Cellulose (BC) membranes with biocompatibility and biodegradability were electrically activated under fully hydrated condition, the bending deformations were observed for both step and harmonic electrical input signals. The LiCl treated Bacterial Cellulose was used to improve the bending actuation performance due to much larger ion migration. XRD, TGA, DSC, tensile test, IEC and ionic conductivity of the LiCl treated Bacterial Cellulose were compared with those of pristine Bacterial Cellulose. The electromechanical performances of LiCl treated BC show much large bending deformation because of its lower stiffness and higher ionic exchange capacity through the proper control of crystallinity. Also, the surface modification that affects the adhesion between the gold electrode and the Bacterial Cellulose surface was observed in the SEM images after LiCl treatment. Present results show that the Bacterial Cellulose actuator can be a promising smart material that may possibly be used in the wet environment of diverse biomedical applications. © 2010 Elsevier B.V. All rights reserved.