陶瓷疏水膜的制备及在废润滑油中脱水的应用

Preparation of Ceramic Hydrophobic Film and Application of Dehydration in Waste Lubricating Oil

采用三甲基氯硅烷作改性剂,对平均孔径50nm氧化锆陶瓷膜进行疏水改性,配制0.02 mol/L的三甲基氯硅烷溶液,用盐酸调节溶液的PH值为4,浸渍24 h,150℃烘干2 h,得到接触角大于140°的高疏水改性膜,用TGA、SEM、FTIR(红外)来表征疏水改性膜,并考察了疏水改性膜在废润滑油中脱水的应用。实验结果表明,跨膜压差0.1 MPa、膜而流速1.3 m/s,渗透通量可以稳定在180L/m^2·h,获得的水截留率均在98%以上,可以回收废润滑油。

Trimethylsilyl chloride was used as a modifier to modify the average pore size of 50 nm zirconia ceramic membrane by hydrophobic modification.A 0.02 mol/L trimethylchlorosilane solution was prepared.The pH of the solution was adjusted to 4 with hydrochloric acid,Impregnation 24 h,150℃.drying 2 h,to obtain contact angle greater than 142°high hydrophobic modified membrane.Hydrophobic modified membranes were characterized by TGA,SEM,FTIR(infrared).The application of hydrophobic modified membrane in the dehydration of waste lubricating oil was investigated.The experimental results showed that the transmembrane pressure difference was 0.1 MPa,the membrane velocity was 1.3 m/s,and the permeate flux was stable at 180 L/m^2·h.The water retention rates obtained are all above 98%,and waste lubricants can be recovered.