Preparation Of Phase Change Temperature And Humidity Adjusting Material And Performance Test Research

In recent years,with the changes in the pattern of the world economy,the problem of lack of energy and waste has been paid more and more attention.In this environment,it is possible to develop a technology that can save energy and improve the utilization rate.Alleviate the problems caused by the lack of energy,including building energy consumption as a major area of energy consumption,its energy-saving technology research and exploration has become urgent.At present,scholars at home and abroad have been working on the research of heat storage materials because the heat storage material absorbs and releases heat through the transformation of its own phase,so as to adjust and control the change of ambient temperature and achieve the purpose of saving energy consumption.People's living standards continue to improve,the quality of life and comfort requirements are getting higher and higher,which,wet comfort as an important factor in how to control its stay in a reasonable range is the most concerned about the scientists Of the complex,more than the above,developed at the same time with the ability to adjust the humidity of the composite building materials has become a hot issue today.In view of the above situation,this paper mainly through the following aspects of the phase change humidity composite materials preparation and performance were studied.Firstly,In this paper,unmodified sodium montmorillonite as matrix material and cetyltrimethylammonium bromide as modifier were studied by orthogonal test.The effects of the stirring time and the reaction temperature on the modification effect of the sodium-based montmorillonite were carried out.The wet performance of the sodium-montmorillonite was tested by the saturated salt solution method.The effect of the modified Moisture Good and bad.The microstructure,material structure and structure of the modified sodium-montmorillonite were analyzed by X-ray diffraction,Fourier transform infrared spectroscopy and scanning electron microscopy.The experimental results show that the modified ratio has the greatest effect on the modification effect,the stirring time is the second,and the reaction temperature has the least effect.The best solution is the modifier/sodium-based montmorillonite 0.4:1,the reaction temperature is 60?,the reaction time was 120 min,and the lattice spacing of the modified bedroions increased from 0.97 nm to 1.92 nm,while the wet performance test showed that the equilibrium moisture content of the modified sodium montmorillonite Humidity)than before the change has been greatly improved.Secondly,modified sodium-montmorillonite was used as intercalation material,and different series of phase change energy storage materials were used as intercalation materials.A series of different phase changes were prepared by melt intercalation method.The content of heat storage material,the temperature of different heating temperature and the different mixing time of the humidity change composite materials,through different phase change materials/modified sodium-based montmorillonite after the stability evaluation and related morphology,composition,composition.The optimized preparation parameters of phase change humidity control composites were obtained.In the end,acrylic acid was used as the humidifying material to further explore the technical way to improve the wettability of the composites.The thermal and wet performance tests were carried out by using the step cooling curve method,the DSC test method and the saturated salt solution method respectively.The results show that the thermal performance of the composites with solid phase fluid organic phase change heat storage material The results show that the temperature control time of the phase change humidity control composites prepared by the solid-solid organic phase change heat storage materials is poor.In terms of wet performance,the equilibrium moisture content of neopentyl glycol / modified sodium montmorillonite is the largest,and the equilibrium moisture content of lauric acid / modified sodium montmorillonite is the smallest,and the sodium.The equilibrium moisture content(relative humidity of 64.92%)was 0.0748 g/g,and the equilibrium moisture content was decreased in different degrees.The humidification process showed that the phase change humidity control composites with acrylic acid were better than those of the phase change humidity composites without adding acrylic acid.The optimum preparation scheme of phase change humidity control composites was neutral degree,Lauric acid / modified sodium montmorillonite is 20% by mass and the stirring temperature is 60?.