Developing the Protective Materials Containing Shear-Thickening Nanocomposites

• Main Authors: Wan Cheng Li, 李萬成
• Other Authors: Ming Der Ger
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/90616560681974146110

碩士 === 國防大學理工學院 === 化學工程碩士班 === 103 === The shear thickening behaviors of concentrated dispersions of micro-silica and nano-silica particles in the ethylene glycol (EG)/poly ethylene glycol (PEG) mixtures are studied by a rheometer. The results show that all SiO2/PEG/EG suspensions possess the reversible shear thickening behaviors. The effects of nano-silica content and EG content on the maximum viscosity and critical shear rate are observed. On the other hand, the ballistic performance and stab resistance of the shear thickening fluids with different compositions are investigated by a drop weight tester and a low velocity ballistic impact test (muzzle velocity of 200 ± 50 m/s) conducted using a gas gun and then finally ballistic impact test (muzzle velocity of 350 ± 50 m/s) conducted tested by practical shooting with 90mm bullet to assess the best conditions for obtaining the best bulletproof and anti-puncture capability.