2345 高速応答型感圧コーティングの開発(S46-3 圧縮性流れの基礎と応用(衝撃波1),S46 圧縮性流れの基礎と応用)  [in Japanese] 2345 Fast responding pressure-sensitive coating  [in Japanese]

We succeed for making porous binder for pressure-sensitive paint (PSP) on stainless steel by sol-gel method. We used the Yoldas method to make aluminum hydroxide sols, which were synthesized from aluminum isopropoxide with nitric acid. Ethylene glycol polymer was added to make the porous structure. Thin alumina gel layer was formed on the stainless steel by dip coating technique. Finally, the layer was calcined in air with 500℃. The sols at 0.16-0.43 mols of acid per mol of alcoxide exhibit thixotropy, which is appropriate to be coated on hydrophobic stainless steel. Scanning electron microscope observation displays that a mezzo porous structure whose porous diameter is 10nm to 100nm was obtained with the aid of template polymers. The pressure sensitivity of the present sol-gel PSP is close to the anodized aluminum PSPs.