Preparation Of Construction Multi-functional Composites And Photocatalysis-heat-moisture Property Study

With the development of social economy,requirements on indoor living quality become increasingly demanding.However,more sharp contradiction between high-quality living condition and energy consumption has arised accordingly.Therefore,in order to achieve building energy efficiency,new energy-saving and environment-friendly materials need researching to improve indoor living quality and realize energy conservation and emission reduction from the perspective of enhancing construction materials’function perspective.Inthisstudy,constructionmulti-functionalcompositeswith photocatalysis-heat-moisture property were prepared by using photocatalytic materials TiO₂,phase change materials and porous humidity materials as the basic materials.Firstly,Ce-La/TiO₂ hollow microspheres were synthesized through sol-gel method,and rare earth elements,Ce and La,were determined as the modifying elements to improve the photocatalytic performance of Ce-La/TiO₂ hollow microsphere under visible light.Then,the moisture properties of Ce-La/TiO₂ hollow microspheres were deeply analyzed according to porous structure of Ce-La/TiO₂ hollow microspheres,of which the effects of preparation parameters on photocatalytic-moisture property of Ce-La/TiO₂ hollow microspheres were mainly studied.Secondly,the vacuum absorption method was used to prepare the decanoic acid-palmitic acid@Ce-La/TiO₂ composites by filing decanoic acid-palmitic acid composite materials into the internal cavity of Ce-La/TiO₂ hollow microspheres.What’s more,preparation parameters of decanoic acid-palmitic acid@Ce-La/TiO₂ composites were optimized by establishing mathematic model,thus,optimized preparation parameters were obtained.Afterwards,influence degree of each parameter on photocatalysis-heat-moisture property was researched.Thirdly,in order to illustrate the effect of microstructure to the photocatalytic property,heat properties and moisture property of optimal decanoic acid-palmitic acid@Ce-La/TiO₂ composites,various characterization methods were applied to characterize the optimal decanoic acid-palmitic acid@Ce-La/TiO₂ composites.Then the preparation and performance mechanism of the optimal decanoic acid-palmitic acid@Ce-La/TiO₂ composites were studied and analyzed.Fourthly,in light on degradation law of formaldehyde decanoic acid-palmitic acid@Ce-La/TiO₂ composites,the dynamics simulation of degradation rate was conducted by referring to fundamental principle of adsorption dynamics and photocatalysis dynamics.Specifically,effects of different concentration and temperature on the photocatalytic rate of formaldehyde by decanoic acid-palmitic acid@Ce-La/TiO₂composites were studied,respectively.Finally,decanoic acid-palmitic acid@Ce-La/TiO₂ composites were mixed into gypsum to prepare gypsum based multi-functional composites.Measures were taken to make gypsum based multi-functional compositesmeet the demand of plaster gypsum and then the photocatalysis-heat-moisture property was tested.Then,the Gypsum based multi-functional composites was used in construction simulation building to further analyze the heat and moisture properties,so as to provide technical support for further promotion of engineering application.