疏水性 KH550-TiO2@PDMS@PU 海绵的 简单制备及油水分离性能.

Abstract：Oily wastewater is generated inevitably in the production processes of iron and steel products. It poses a threat to the environment and consequently to human health if not handled properly. In this study, a hydrophobic and oleophilic KH550-TiO2@PDMS@PU modified sponge was prepared by a simple one-step impregnation method. TiO2 nanoparticles, 3-aminopropyltriethoxysilane（KH550）, and polydimethylsiloxane（PDMS） were the main starting chemicals. Due to the low surface energy of PDMS and the rough structure caused by the KH550-modified TiO2 particles, the sponge was converted to a hydrophobic material and the water contact angle was（147.25±1.44）°. The modified sponge could maintain stable hydrophobicity and durability under complicated conditions such as gluing, extrusion, acid and alkali, and ultrasonication. It could absorb oil up to 20-25 times its own weight by means of the adsorption-extrusion cycle. The excellent oil/water separation performance suggests that the KH550-TiO2@PDMS@PU sponge with advantages of being non-toxic, easy to prepare, stable and hydrophobic has a broad application prospect in the steel industry. MoreReset [ABSTRACT FROM AUTHOR]