title: Flexible conductive nanocellulose combined with silicon nanoparticles and polyaniline.
abstract: Here we describe a unique conductive bacterial cellulose (BC) composite with silicon nanoparticles (SiNPs) and polyaniline. BC was used as a template for binding SiNPs resulting in a very promising anode material for Li-ion rechargeable batteries that showed a high specific capacity. The surfaces of the SiNPs were modified with phytic acid to enhance the binding of aniline monomer to the surface. A conformal coating of polyaniline (PANi) was formed on the modified SiNPs by in situ polymerization of aniline monomers. We also found that the phytic acid on the SiNPs was critical to ensure encapsulation of SiNPs with PANi. In addition, the phosphoric acid-tagged surface of the SiNPs enhanced the adhesion of SiNPs to the BC fibers. The resulting three dimensional network of BC was flexible and provided stress dissipation in the conductive BC composites. Flexural testing of conductive BC composites showed stable electrical conductivity even after repetitive bending over 100 times.
authors.affiliation: Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 151-921, Republic of Korea.
authors.forename: Minsung
authors.initials: M
authors.lastname: Park
authors.affiliation: Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 151-921, Republic of Korea.
authors.forename: Dajung
authors.initials: D
authors.lastname: Lee
authors.affiliation: Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 151-921, Republic of Korea.
authors.forename: Sungchul
authors.initials: S
authors.lastname: Shin
authors.affiliation: Laboratory of Adhesion & Bio-Composites, Program in Environmental Materials Science, Seoul National University, Seoul 151-921, Republic of Korea.
authors.forename: Hyun-Joong
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 151-921, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Republic of Korea. Electronic address: jhyun@snu.ac.kr.
authors.forename: Jinho
authors.initials: J
authors.lastname: Hyun
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D004553:Electric Conductivity; D055595:Mechanical Phenomena; D008958:Models, Molecular; D008968:Molecular Conformation; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D013314:Stress, Mechanical; D013696:Temperature
chemical_list: D000814:Aniline Compounds; C416807:polyaniline; D002482:Cellulose; D012825:Silicon
keywords: Conductivity; Flexibility; Nanocellulose; Nanocomposites; Polyaniline; Silicon nanoparticles