Novel Janus polymer hollow fiber membrane and preparation method and application thereof

A polymer membrane and fiber membrane technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of complex preparation procedures, uneven surface modification of membrane materials, modification of membrane materials, etc. Mild conditions, easy-to-operate effects

Active Publication Date: 2019-04-16
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem existing in the current prior art is that the existing wet modification process is likely to cause modification on

Method used

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  • Novel Janus polymer hollow fiber membrane and preparation method and application thereof
  • Novel Janus polymer hollow fiber membrane and preparation method and application thereof
  • Novel Janus polymer hollow fiber membrane and preparation method and application thereof

Examples

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preparation example Construction

[0049] The preparation method of the preferred novel Janus polymer hollow fiber membrane of the present invention, comprises the steps:

[0050] Step 1: First, perform ultrasonic cleaning on the polymer hollow fiber membrane material (ultrasonic power is 100W-360W), and then use bisphenol A type epoxy resin and amine curing agent to cure and seal its two ends.

[0051] Step 2: prepare a certain concentration of benzoyl peroxide initiator solution (the concentration of benzoyl peroxide in acetone is 3wt%-11wt%), and soak the end-capped membrane silk in step 1; after 2h-6h, The membrane filaments are taken out, and the membrane material loaded with the initiator is obtained after the solvent is completely volatilized.

[0052] Step 3: Mix the vinyl monomer with maleic anhydride, deionized water and organic solvent, transfer the mixed solution to an ultrasonic reaction instrument, heat it to a certain temperature and pass nitrogen gas, and finally put the membrane loaded with the...

Embodiment 1

[0080] The preparation method of the novel Janus polymer hollow fiber membrane in this embodiment is realized according to the following steps:

[0081] Step 1. First, ultrasonically clean the polypropylene hollow fiber membrane material with an ultrasonic power of 100W for 1 hour, and then seal both ends of the polypropylene hollow fiber membrane with bisphenol A epoxy resin and amine curing agent.

[0082] Step 2: preparing a benzoylacetone peroxide solution with a concentration of 3 wt%, soaking the capped membrane filaments in step 1; taking out the membrane filaments after 6 hours, and obtaining the membrane material loaded with the initiator after the solvent is completely volatilized.

[0083] Step 3. Mix 2.7g of styrene, 5.06g of maleic anhydride, 14.73g of deionized water and 132.59g of acetone, and transfer the mixed solution to an ultrasonic reaction instrument, heat it to 60°C and pass in nitrogen gas, and finally put the load The membrane silk with the initiator w...

Embodiment 2

[0088] The preparation method of the novel Janus polymer hollow fiber membrane in this embodiment is realized according to the following steps:

[0089] Step 1. First, ultrasonically clean the polypropylene hollow fiber membrane material with an ultrasonic power of 250W for 1 hour, and then seal both ends of the polypropylene hollow fiber membrane with bisphenol A epoxy resin and amine curing agent.

[0090] Step 2: preparing a benzoylacetone peroxide solution with a concentration of 5 wt%, soaking the capped membrane filaments in step 1; taking out the membrane filaments after 6 hours, and obtaining the membrane material loaded with the initiator after the solvent is completely volatilized.

[0091] Step 3: Mix 4.77g of styrene, 2.99g of maleic anhydride, 29.46g of deionized water and 117.86g of acetone, transfer the mixed solution to an ultrasonic reaction instrument, heat it to 65°C and pass in nitrogen gas, and finally put the load The membrane silk with the initiator was ...

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Abstract

The invention relates to a novel Janus polymer hollow fiber membrane and a preparation method and application thereof. Hole structures are formed in the outer surface and the inner surface of the Janus polymer hollow fiber membrane respectively, the outer surface has hydrophilic performance, the inner surface has hydrophobic performance, and the water contact angle of the outer surface is smallerthan 70 degrees. The novel Janus polymer hollow fiber membrane is prepared through the steps that 1, the two ends of the polymer hollow fiber membrane are blocked, and a blocked fiber membrane is obtained; 2, the blocked fiber membrane is immersed into an initiator solution; 3, the blocked fiber membrane supported with an initiator obtained in the step 2 is placed in a modifying solution for a reaction; 4, the modified membrane obtained in the step 3 is washed. The Janus membrane is high in flux, high in rejection and resistant to pollution, and the preparation technology is simple, easy to operate, mild in condition and high in universality.

Description

technical field [0001] The invention belongs to the field of polymer separation membranes, in particular to a novel Janus polymer hollow fiber membrane and a preparation method. Background technique [0002] Janus membrane is an emerging concept in the membrane field. It generally refers to a separation membrane with an asymmetric structure or property. Since this concept was first proposed in 2010, it has received extensive attention in the field of membrane research. In 2016, it was documented that the key to distinguish Janus membranes from general asymmetric membranes is whether the properties of the two sides of the membrane are "opposite", such as hydrophilic / hydrophobic or positively charged / negatively charged, while the simple structure or composition The asymmetry on cannot be called a Janus membrane. [0003] Due to its unique structure and performance, Janus membrane materials have been widely used in various fields, such as interfacial mass transfer, controlla...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D69/02B01D67/00C02F1/44
CPCB01D67/0093B01D69/02B01D69/08B01D2325/36B01D2325/38C02F1/44
Inventor 邵会菊秦舒浩张凯舟祁娅婷罗大军崔振宇
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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