Preparation And Properties Of PVB Films With Sound Insulation And Heat Insulation

Studies have shown that organic/inorganic composite materials can have excellent optical and acoustic properties,and can be widely used in various industries by optimizing the composition.This paper starts with the sound insulation and heat insulation materials needed in the fields of construction,automobiles,etc.,selects inorganic particles with barrier effect such as T-ZnOw,SiO₂ doped into PVB resin,and processed into PVB composite films by film equipment.Pressed into a laminated glass to optimize sound insulation and thermal insulation performance,to achieve the requirements of energy-saving and environmental protection.PVB/T-ZnOw composite films and PVB/SiO₂ composite films were prepared by solution blending method.First,surface treatment was performed on T-ZnOw and SiO₂using a silane coupling agent to improve the dispersion of filler in the PVB matrix and solve the agglomeration of unmodified filler in matrix resin.Then,the composite material film was subjected to the ultraviolet-visible-near infrared light transmittance test and sound insulation residue test to characterize the heat insulation and the sound insulation performance of the composite material film.Infrared,activation index,lipophilicity,sedimentation,and dispersion analysis results show that KH-570 has been grafted on the surface of T-ZnOw,making T-ZnOw exhibit certain lipophilicity.Scanning electron microscope photos show that the modified T-ZnOw does not agglomerate in the PVB matrix.When the amount of modified T-ZnOw suspension is 0.4%,the PVB/T-ZnOw composite film has more than 70%visible light transmittance,while blocking UV and near-infrared light compared to the traditional PVB film is more than doubled,it can block 63%of ultraviolet light and 42%of near-infrared light,and the sound insulation effect has been improved 1.5%.The falling ball impact test showed that the composite membranes in the laminated glass were not broken or exposed,and the adhesion of the composite membranes met the usage standards.KH-570 was used to modify the surface of SiO₂ particles with a particle size of 30 nm,80 nm,and 120 nm,respectively.The effects of the particle size,dispersion,and amount of SiO₂ on the heat insulation and the sound insulation performance of the composite film were investigated.Fourier infrared spectroscopy,particle size analysis,and thermal weight loss tests have proven that KH-570 was successfully grafted onto the SiO₂ surface.The analysis of contact angle and dispersity showed that the surface characteristics of SiO₂became lipophilic after modification.When the addition of SiO₂ with a particle size of 120nm before the modification is 8%,the composite film has the best light blocking performance.It can transmit 72%of visible light,block 78%of ultraviolet light,and 30%of near-infrared light.When the amount of the modified 120 nm SiO₂ is added at 10%,the composite film can transmit more than 80%of visible light and block 75%of ultraviolet rays and 28%of near-infrared rays.It can also block 34.2%of noise.In the falling ball impact test,the film in the laminated glass was not broken or exposed,and the adhesion of the membrane was in line with the national standard.