Influence of cellulose on the thermal conductivity of cellulose based composite thin films

Abstract

A simplified method using spin coating to prepare cellulose thin film composite has been introduced for insulating materials and thermal conductivity applications. Cellulose was derived from olive pomace and cotton (cellulose triacetate). These two sources were deposited on a silica and glass substrate, to obtain a smooth film based on cellulose (100 μm thick)). A hybrid system based on cellulose thin films was presented to study the effect of additives and the type of cellulose source on the thermal conductivity: silica SiO2, dioxide titan TiO2, olive pomace and cellulose triacetate. The different combinations of cellulose composites offer relative thermal performance, depending on the thickness, the materials processing method, the substrate, the additive and the type of cellulose source. The thermal conductivity was measured using the hot plate technic evolving in a non-stationary regime. The films were characterized by Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and also by the Energy Dispersive X-Ray Analyzer (EDX) to determine the chemical structure of the layers. The optical behavior was investigated by Ultraviolet–Visible Spectroscopy (UV–VISIBLE).