Research And Applications Of Novel Energy-saving Insulation Coatings

In recent years, with the acceleration of the urbanization process in our country, thearchitectural industry is developing rapidly, and the living environment has been improved.But there is no energy-saving structure or energy-saving material being used in most of thebuilding, resulting in a large proportion of building energy consumption in total energyconsumption of our society. Thence, researching and developing energy-saving buildingmaterial for the reducion of building energy consumption has became a problem for us tosolve without delaying. This article innovatively modified the acrylic resin with organicfluorine and organic silicone as two functional monomers, combining both of their superiorperformances to prepare organic fluorine-silicone modified acrylic emulsion, which has agood film-forming properties and superior water resistance, high temperature resistance, colorretention, light resistance, adhesion, etc. film performance. Barrier type, infrared radiationtype and reflection type energy-saving insulation coatings with a single insulation mechanismwere prepared by using the organic fluorine-silicone modified acrylic emulsion as the basematerial and separately using hollow silica microspheres, metal oxides, ceramic beads as afiller. Besides, composite energy-saving insulation coating with an integrated mechanism wasprepared by using a mixture of the three as a filler. We optimized the formulations of the fourtypes of energy-saving insulation coatings and compared their insulation effect. The resultsshowed that the prepared energy-saving insulation coatings had a good thermal insulationeffect and an excellent overall performance, being expected to play an important role inpractical applications.In the first part of the study, fluoro-silicone modified core-shell structured nano acrylicemulsion was sythesized by using vinyl triethoxy silane (VTES), dodecafluoroheptyl methylacrylate (DFMA) and n-butyl acrylate (BA) as shell monomers and using styrene (St) andmethyl methacrylate (MMA) as core monomers. We studied the core-shell structure and theimpaction of function monomers VTES and DFMA on the coating performances. Thechemical structure, particle size and distribution and morphology of the emulsion wasrespectively characterized by infrared spectroscopy, dynamic laser light scattering (DLS) andtransmission electron microscopy (TEM). Contact angle measurement was utilized todetermine the hydrophilicity and hydrophobicity of the coating surface. The resultsdemonstrated that the core-shell structured nano-emulsion had a narrow and uniform sizedistribution and the addiation of VTES and DFMA was conducive to improving the adhesion,water resistance, ultraviolet resistance and stain resistance of the coating. When the addedamount of VTES and DFMA was seperately6%and8%of the total monomer amount, theprepared nano-emulsion exhibited a good stability and an excllent overall coatingperformance. It’s contact angle of up to110.2°and outstanding water resistance of the coatingmake it probablely be well used in energy-saving insulation coatings.In the second part of the study, hollow silica microspheres were prepared templating onn-octylamine and pyrrolidone functionalized polystyrene, respectively. We investigated theeffect of various reaction conditions on the microstructure and dispersion of the prepared hollow silica. Infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA) and scanningelectron microscopy (SEM) were used to characterize the chemical structure andmicrostructure of the hollow particles, and it’s size and dispersion were observed underelectron microscopy. By comparing the two preparation methods, it was finded that thehollow silica particles templating on n-octylamine template had an integral structure and auniform size distribution, besides, the coatings prepared by using it as a filler had a goodthermal insulation effect.In the third part of the study, fluorine-silicon modified nano acrylic emulsion prepared inthe first part was used as a base material and hollow silica microspheres, metal oxides,ceramic beads, and the mixture of the three were respectively used as insulating fillers toprepare barrier-type, radiation-type, reflection-type and composite-type energy-savinginsulation coatings. By testing the insulation effect of the four types of energy savinginsulation coating, we can conclude that the composite-type energy-saving insulation coatinghas a best insulation effect and followed by barrier-type insulation coating using hollow silicaas a filler.