Temperature-induced hydrophobicity transition of MXene membrane for directly preparing W/O emulsions  

作　　者：Yingxiang Ni Can Yuan Shilong Li Jian Lu Lei Yan Wei Gu Weihong Xing Wenheng Jing 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing 210009,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第3期59-62,共4页中国化学工程学报（英文版）

基　　金：the support from the National Key Research and Development Program of China (2021YFB3801303);the National Natural Science Foundation of China (21838005, 21921006);the Key Scientific Research and Development Projects of Jiangsu Province (BE201800901)。

摘　　要：Although hydrophilic membranes are desired for reducing resistance to water permeation, hydrophilic surfaces are not used in the water-in-oil(W/O) membrane emulsification process because water spreads on the hydrophilic surface without forming droplets. Here, we report that a hydrophilic ceramic membrane can form a hydrophobic interface in diesel at a higher temperature;interestingly, the experiments show that the contact angle increases when the temperature rises. The hydrophilic membrane surface evolves into a hydrophobic interface, particularly near the boiling point of water, resulting in a water contact angle of 147.5° ± 1.2°. This work established a method for preparing W/O monodispersed emulsions by direct emulsification of hydrophilic ceramic membranes at a temperature close to the boiling point of water.Additionally, it made high flux of membrane emulsification of monodispersed W/O emulsions possible,which satisfied the industrial requirements of fluidized catalytic cracking in the petrochemical industry.

关 键 词：Membrane emulsification Ceramic membrane Hydrophobic interface W/O emulsions 

分 类 号：TE624.41[石油与天然气工程—油气加工工程] TQ051.893[化学工程]