Antuo Wang,Xianglong Li,Teng Hou,Yishen Lu,Jing Zhou,Xianggui Zhang,Bin Yang
Recently, the membranes with durable and highly efficient separation performances for the purification of oil/water emulsions have drawn wide concern due to the great potential application in solving the problem of offshore oil spill and the discharge of oily wastewater. However, the crucial issues of low-permeability and severe membrane fouling seriously affect their application. Herein, we created an ultrafine tree-grapes-like poly(tetrafluoroethylene) (PTFE) fibrous membrane (UTPFM), which aimed to provide a fibrous membrane with ultrahigh permeability and separation efficiency. The fibrous membrane with regular grapes on fiber surface was fabricated by sintering electro-centrifugal spinning ultrafine fibrous poly(vinylpyrrolidone) (PVP)/PTFE membranes. The size and number of grapes could be simply controlled by the PVP/PTFE ratios, and brought water contact angle (WCA) of obtained fibrous membrane up to 154.6°. As a result, the obtained fibrous membrane presented ultrahigh permeability up to 3200 L m -2 h −1 and high separation efficiency more than 99%. Moreover, the grape structures on fiber surface were demonstrated to bring without any changes after 1000 cycles of abrasion. Therefore, the obtained membrane exhibits a great potential application in the long-term, stable and efficient oily wastewater separation.
Lin Ling,Wang Chunxia,Mao Haiyan,Wu Huanling,Li Ziyin
Research on multi-functional fabrics is an inevitable trend in the future development of textile field. Nevertheless, the key to the development of multifunctional fabric is how to solve the problem of contradictory function combination and how to achieve the multifunctions. In this work, a novel multifunctional fabric based on cellulose/silica microcapsules was developed by using a facile and economical method. Owing to the loaded essence and hydrophobic coupling reagent and UV absorber modified silica of microcapsules, the coated fabric not only exhibited the slow-release property of fragrance, but also had the excellent superhydrophobicity and ultraviolet (UV) protection. Furthermore, this multifunctional fabric also displayed the durable superhydrophobicity and UV protection even after chemically or mechanically damaged. The development of multifunctional fabrics largely depends on the development of textile functional finishing agent and finishing technology. Therefore, it is very important to develop new functional microcapsules or finishing agent. Graphical abstract
危险品化学品经营许可证（带存储）