航空级超细玻璃纤维棉毡的制备及隔音隔热性能研究

Preparation of Super-Fine Aviation Glass Wool and Its Property Study on Sound and Thermal Insulation

航空级超细玻璃纤维是一种无机质纤维,具有体积密度小、热导率彽、保温绝热、吸音性能好、耐腐蚀以及化学性能稳定等优点,是大型客机保温隔音的关键材料。本文通过火焰喷吹法制备出航空级超细玻璃纤维,并涂覆酚醛树脂黏结剂,在获得优异憎水性能的同时还具有优异的阻燃性能。然后采用扫描电镜（Scanning electron microscope,SEM）、光学显微镜、导热分析仪、驻波管以及接触角测试仪分别对棉毡的结构、声学性能以及憎水性能进行测试,结果表明：纤维直径在1.2~3.2μm之间呈正态分布,棉毡的接触角为142°,憎水性能高达98.9%,阻燃性能优异且无滴落现象;棉毡隔音隔热性能优良,随着棉毡的容重增加,棉毡的导热系数降低,隔声量随之增加;层状结构的设计以及纤维直径的超细化有利于提高棉毡的保温隔音性能。

Super-fine glass fiber is a kind of inorganic fibers,which has small volume density,low thermal conductivity,better sound absorbing performance,corrosion resistance and stable chemical properties,etc.In this paper,glass fibers are prepared by the flame blow process.Phenolic resin is used as a binder to obtain excellent flame retardancy and hydrophobic performance.The structure,acoustic performance and hydrophobic performance of glass fiber felts are characterized by scanning electron microscope（SEM）,optical microscope,thermal conductivity analyzer,standing wave tube and contact angle tester.The results show that the fiber diameter presents normal distribution,mainly concentrated in2.2μm;The contact angle of glass fiber felt is 142°and the hydrophobic property is 98.9%.With the increase of density of glass fiber felts,the thermal conductivity reduces along with the increase of sound insulation.The design of the layered structure and refinement of glass fiber can improve the heat preservation and the sound insulation performance of glass fiber felts.