Hybrid organic–inorganic materials based on cellulose matrix and silica particles are obtained from wastes of the local paper recycling mill and sugarcane mill as renewable secondary raw materials. The performance comparison of these hybrid materials made from secondary raw materials against the materials made from pure, raw sources is discussed. The Fourier transform infrared spectra show that cellulose features prevail even at 43 wt% silica nanoparticles in the hybrid materials. Such a high content of silica originated from sugarcane bagasse ash and hollow glass microspheres contributes to the high thermal stability of the final composites, as seen by thermogravimetric analysis with very low water absorption. This one‐step approach of biobased hybrid materials represents an excellent way to produce high‐performance materials with high content of inorganic nanoparticles for a wide variety of applications like energy efficient building material completely cement‐free.
In this work, an electrochemical study of the corrosion of steel embedded in concrete was conducted. This five test samples with cement, sand, water are produced; adding composite of hydrophobic cellulose and sugar cane bagasse ash (SCBA) previously treated, both substances are agroindustrial wastes from: Bioppapel and the sugar mill in this city of San Juan Bautista Tuxtepec. After 24 hours of drying, the samples are subjected to curing in saturated solution of calcium hydroxide and electrochemical measurements were started and continued for a period of 28 days. Then a solution of sodium chloride 3% was added according to electrochemical measurements. This study was conducted in order to observe the potential for inhibiting the steel corrosion by adding this new composite to traditional concrete . The electrochemical techniques applyed are: Electrochemical Impedance Spectroscopy and linear polarization resistance using a potentiostat/galvanostat ACM Instruments serial 914 with a calomel reference electrode. The results of these tests will be explained in the poster presentation.
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