Friction and Wear Characteristics of Bacterial Cellulose Modified by Microcellular Foaming Process

Bacterial cellulose (BC) is a biodegradable, non-toxic, natural substance that can be obtained by culturing bacteria. It approached in various ways from physical, chemical, and biological points. BC nanoparticles have been applied as lubricating additives to improve the load capacity, anti-wear, friction. The microcellular foaming process was created using technology based on saturation of polymer supercritical CO2 rapid decompression. An increase pressure leads an molecular potential energy CO2, which more easily compressed into matrix. Moreover, high crystallinity water content combination contribute thermal stability. Specimen membranes produced Komagataeibacter xylinus prepared with thickness 2 mm were saturated condition, 10 MPa for 4 h, foamed at temperature 120 °C hot press. After process, we used dry ice cool BC. Before foaming, friction coefficient continuously increased cycles, after stable 0.3 or less secured despite cycle. significantly reduced made BC’s stable.