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Mechanical, acoustic, and thermal performances of shear thickening fluid–filled rigid polyurethane foam composites: Effects of content of shear thickening fluid and particle size of silica
Author(s) -
Li TingTing,
Ling Lei,
Wang Xiaoxiao,
Jiang Qian,
Liu Bobo,
Lin JiaHorng,
Lou ChingWen
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47359
Subject(s) - materials science , composite material , polyurethane , dilatant , thermal conductivity , composite number , thermal insulation , rheology , thermal expansion , particle size , noise reduction coefficient , shear (geology) , porosity , chemistry , layer (electronics)
Shear thickening fluid (STF) features a rheological property, and rigid polyurethane (PU) foams feature low thermal conductivity and excellent acoustic insulation. In this study, an STF/PU rigid foam composite sandwich structure was designed using different contents (0, 0.5, 1, or 1.5 wt %) of STF that contained 14 nm, 40 nm, or 75 nm silicon dioxide (SiO 2 ). The effects of STF content and silica size on the cell structure, mechanical performance, acoustic absorption, and thermal performance of the STF/PU foam were explored. The test results show that STF/PU foam exhibited three characteristic acoustic absorption peaks, and the maximum acoustic absorption coefficient reached 0.841. STF addition increased compression, bending strength, and maximum acoustic coefficient, as well as initial mass loss temperature. STF‐filled PU foam composites containing 14 nm and 40 nm SiO 2 had a mild rise in thermal insulation. The rigid STF/PU foam composites with a cell structure had the maximum thermal conductivity of 0.22 W m −1 K −1 and sound absorption coefficient of 0.841, which confirm that they are a good candidate for sound‐absorbing energy conservation materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47359.