Porous Carbon Nanotube-incorporated Bacterial Cellulose Membranes

초록

Carbon nanohrbes (CNTs) are attractive materials for catalyst support in Proton exchange membrane fuel celt (PEMFC) due to their morphology and interesting properties such as nanomekr size, high accessible surface area" corosiotr resistance, good electrical conductivity and high stability. CNTs as the support for ft catalyst nanoparticles higher PEMFC and direct methanol fuel cell performances were achieved. Bacterial cellulose (BC) is a sustainable natural pollmer belongrng to the polysaccharide family, and is produced by acetic bacteria, e.g. Acetobacter xylinum. This BC has a unique structure and properties compared to any other tlpes of cellulose in terms of its purity, high crystallinity and high mechanical saength. Above all BC membrane bas a macroporous 3D-intercomected network strucfure. In this study, we prepared porous CNT electrode with macroporous networking inner-stuctue, which has fimctions of both gas diffirsion layer and catalyst layer. Bacterial cellulose membrane (BCM) was used to support macroprous CNT network. In this process, multiwalled carbon nanotubes (MWCNTs) were homogeneously intoduced in the inside and outside of the BCM without any damage of macroporous 3D-netwo* structure by using ultrasound teatment and vacuum filtering. And then Pt incorporated MWCNTs were introduced in a surface of MWCNT incorporated BCM tbrough easy method by vacuum filtration. This electrode based on MWCNT and BCM was accomplished by fteeze-drying. Morphological, electrical and electro-chemical property of the electrode was investigated.