Environmentally friendly cement composites: Surface permeability of bacterial nanocellulose (BNC)-coated natural fibers

In this study, possibility of manufacturing environmentally friendly cement composites, using agricultural wastes as filler and bacterial cellulose as reinforcement and coating layer, was explored. To betterunderstanding of the process, permeability of bacterial nanocellulose (BNC)-coated natural fibers to alkaline ions in fiber-cement composites(FCCs) was investigated. Mechanical and micro-structural properties of bagasse FCCs manufactured with powder, BNC coated fibers, and gelwere also measured. Results indicated that, FCCs containing 6 wt% fiber content manufactured with BNC-coated fibers and BNC gelenhanced mechanical properties. However, P FCCs exhibited inferior properties compared to C and G FCCs. According to Scanning electronmicroscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) analysis, the surface of BNC-coated fibers was rich in hydrationproducts whilst permeability of alkaline ions into the lumen was reduced. BNC created both a strong interface with cement and prevented fiber mineralization.

کلیدواژه ها:

FCC ، bacterial cellulose ، alkaline ions ، permeability ، mechanical properties