Efficient electrostatic spinning oil-water separation fiber membrane
A technology of oil-water separation and electrospinning, applied in electrospinning, immiscible liquid separation, liquid separation, etc., can solve the problems of low separation efficiency, poor strength, secondary pollution, etc., and achieve high separation efficiency and high separation The effect of traffic
Inactive Publication Date: 2016-05-25
NANJING FORESTRY UNIV
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Problems solved by technology
However, these fibers have the disadvantages of slow separation speed, low separation efficiency, poor stability, poor strength, and easy to produce secondary pollution.
Moreover, the biggest obstacle of slow separation speed, low separation efficiency and poor strength seriously limits their practical application.
Method used
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Embodiment Construction
[0026] The preparation method of the preparation method of the efficient superhydrophobic and superoleophilic oil-water separation nanofiber membrane comprises the following process steps:
[0027] (1) synthesis of PAA;
[0028] Add biphenyltetracarboxylic dianhydride (BPDA) and p-phenylenediamine (PDA) respectively 2.9422g and 1.0814g (molar ratio 1:1) into a dry four-necked flask equipped with a mechanical stirrer, a thermometer, and a nitrogen gas inlet and outlet tube, and mix well ; Under strong mechanical stirring, add 40ml of DMAc, react at -15°C-5°C for 24 hours, and then terminate the reaction to obtain PAA.
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The invention discloses a preparation method of an efficient electrostatic spinning oil-water separation fiber membrane. The preparation method includes the steps that polyamic acid (PPA) is synthesized, a PPA nanofiber membrane is prepared in an electrospinning mode, and the PPA nanofiber membrane is imidized into a polyimide membrane (PI); a cellulose acetate (CA) nanofiber membrane is prepared; coaxial electrospinning is carried out on CA-PAA, and a product is imidized into CA-PI; benzoxazine monomers (BAF-tfa) are synthesized; in-situ immobilization is performed on the CA, PI and CA-PI nanofiber membranes with BAF-tfa and BAF-tfa / silica nanoparticles (SiO2NPs); an oil-water separation experiment is carried out. The preparation method has the advantages that by carrying out surface modification on the fiber membranes, the CA-PI nanofiber membrane which is biodegradable, low in cost, large in oil-water separation flow and high in separation efficiency is obtained; the high-performance membrane material has broad application prospects in oil-water separation, sewage treatment and deepwater oil leak.
Description
technical field [0001] The invention relates to a method for preparing an efficient electrospinning oil-water separation fiber membrane, in particular a method for preparing an efficient superhydrophobic and super-oleophilic electrospinning oil-water separation fiber membrane for gravity-driven oil-water separation. Background technique [0002] By electrospinning, many literatures on nanofibrous membranes such as polystyrene, polycaprolactone, polymethyl methacrylate, polyurethane, and inorganic silica fibers have been reported. However, these fibers have the disadvantages of slow separation speed, low separation efficiency, poor stability, poor strength, and easy to produce secondary pollution. Moreover, the biggest obstacle of slow separation speed, low separation efficiency and poor strength seriously limits their practical application. Contents of the invention [0003] The present invention proposes a method for preparing an efficient superhydrophobic and superoleop...
Claims
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Login to View More IPC IPC(8): D04H1/4258D04H1/4334D04H1/4382D04H1/728D01D5/00B01D17/022C02F1/40
CPCD04H1/4258B01D17/02C02F1/40D01D5/003D04H1/4334D04H1/4382D04H1/728
Inventor 黄超伯赵俊涛马文静刘中车陈鄞琛王芳高步红邵伟
Owner NANJING FORESTRY UNIV
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