A Study On The Preparation And Pyrolysis Dynamics Of MOC/Wood Flour Composites

This article researched in the MOC/wood flour composite material preparation, mechanical properties, production process and pyrolysis characteristics. The main research content as follows:adopting the experimental method to determine the molar ratio of MgO style/MgCl2 of the pure magnesium oxychloride cement, provided basic experiment data for the preparation of composite materials; Determined the appropriate wood powder particle size and amount, MOC/wood flour composite material was prepared, and studied its mechanical properties; We used the synchronous thermal analyzer Q600 of TA company in the United States to study the pyrolysis characteristics; The Coats-Redfern integral method the pyrolysis process of MOC/wood flour composite material has carried on the dynamic analysis, to determine the most appropriate kinetic mechanism function, pyrolysis model is established, and calculating the corresponding activation energy and refers to the former factor.Experimental research shows that:(1) the best match of pure magnesium oxychloride cement proportion is MgO:MgCl2= 7:1. (2) the wood powder particle size between 40 to 20 mesh ", the add amount between 20%-30%, the MOC/wood flour composite material has good performance. (3) the MOC/wood flour composite materials in the process of pyrolysis under pure air atmosphere mainly divided into two stages:The first stage for the loss of crystal water of and for the process of free water; The second phase of magnesium hydroxide hydrolysis fluid loss and magnesium chloride process. MOC/wood flour composite materials is limited under 140℃, MOC/wood flour composite materials has completely decomposed at 600℃, which can realize the MOC/wood flour composite materials waste recycling. (4) MOC/wood flour composite materials thermal decomposition weightlessness activation energy is 53.3 KJ/mol in the first stage, Pre-exponential factor is 7.1×106s; The second stage of thermal decomposition weightlessness activation energy is 131.1 KJ/mol, Pre-exponential factor is 1.1×1010s.