A kind of preparation method of ultraviolet light-driven switchable wettability nanofiber membrane
A nanofiber membrane and external drive technology, applied in separation methods, chemical instruments and methods, membranes, etc., can solve problems such as wettability is difficult to meet the requirements
Active Publication Date: 2022-07-01
HARBIN INST OF TECH
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Problems solved by technology
[0004] Although the selective super-wetting membrane separation method has many advantages, for more complex oil-water environments, it is necessary to change the wettability and the separation method of "passing oil" or "passing water" in real time to achieve separation on demand, only with a single selective wettability sexually unsatisfactory
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[0023] A preparation method of ultra-wettable nanofiber membrane with UV-driven switchable wettability, comprising the following steps:
[0024] Step 1. Fluorinated TiO 2 Preparation of particles: take perfluorooctyltrimethoxysilane (PFOS) and add it to absolute ethanol for 10min stirring and hydrolysis, the mass ratio of the two is 1.7:10, and P25-TiO is added under magnetic stirring 2 The particles were continuously stirred for 1 hour at room temperature to obtain liquid I, and then the liquid I was placed in an evaporating dish and placed in an oven, heated at 90 °C for about 1 h, until the solvent was completely evaporated, and then taken out to obtain dry granular solid block TiO 2 -PFOS, then dry granular solid block TiO 2 -PFOS is placed in a grinding bowl and ground to obtain fluorinated TiO 2 Particle spare;
[0025] Step 2. Preparation of electrospinning solution: Mix and stir N,N-dimethylformamide (DMF) and acetone in proportion, and the mass ratio of N,N-dimethy...
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Abstract
The invention relates to the field of nanofiber material preparation, and more particularly relates to a method for preparing a nanofiber membrane with UV light-driven switchable wettability, comprising the following steps: S1, taking perfluorooctyltrimethoxysilane and adding it to a Carry out hydrolysis in water ethanol, add P25-TiO2 particles to stir, and then volatilize to obtain dry TiO2-PFOS particle solid blocks and pulverize; S2, mix N,N-dimethylformamide and acetone in proportion, and add PVDF -HFP is stirred until it is completely dissolved, and then the fluorinated TiO2 particles are added for stirring to obtain an electrospinning solution; S3, the electrospinning solution is electrospinned, and N,N-dimethylformamide and acetone are spun in the spinning solution. During the silk process, it volatilized, leaving a PVDF-HFP-TiO2-PFOS nanofiber membrane, and after removing the residual solution, the obtained nanofibrous membrane could convert the wettability of the superwetting membrane.
Description
technical field [0001] The invention relates to the field of preparation of nanofiber materials, in particular to a preparation method of a nanofiber membrane with UV light-driven switchable wettability. Background technique [0002] In recent years, due to the increasingly serious environmental pollution caused by marine oil leakage and industrial wastewater discharge, the amount of wastewater treatment has gradually increased. The traditional separation methods of wastewater are mainly physical treatment methods and chemical treatment methods, of which physical treatment methods include gravity separation and centrifugal separation, etc. , chemical treatment methods such as combustion methods, etc., this traditional separation method consumes high energy and has low efficiency and is easy to cause secondary pollution. [0003] In view of the above defects, the selective superwetting membrane separation method has the characteristics of high efficiency, environmental friend...
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IPC IPC(8): B01D67/00B01D69/02B01D69/10D04H1/4382D04H1/728B01D17/022
CPCB01D67/0002B01D69/02B01D69/10D04H1/43838D04H1/728B01D17/085B01D2325/38
Inventor 李斐然霍天威潘昀路赵学增
Owner HARBIN INST OF TECH