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Nanosized silica sphere/polypiperazine-amide nano composite nanofiltration membrane and preparation method thereof

A technology of polypiperazine amide and nano-silicon oxide, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of high energy consumption and cost, and the introduction of nano-silicon oxide spheres into polypiperazine amide nanofiltration membranes , low water flux and other issues, to achieve the effect of improved hydrophilicity, favorable water flux, and stable separation performance

Inactive Publication Date: 2015-08-19
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, this method is mainly used in the preparation of nano-silica spheres / aromatic polyamide nanocomposite reverse osmosis membranes, and there is no report on the introduction of nano-silica spheres into polypiperazineamide nanofiltration membranes.
In addition, there is still the problem of low water flux during the use of composite nanofiltration membranes, resulting in high energy consumption and high cost; One of the key points of membrane preparation technology research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Add a certain amount of piperazine monomer to deionized water to make its concentration reach 0.2w / v%, then add a certain amount of sodium dodecylsulfonate to the solution to make its concentration reach 0.005w / v% , and then adjust the pH value of the above solution to 10 with sodium phosphate, mix uniformly to form an aqueous phase solution, then immerse the polysulfone ultrafiltration support membrane with a pore size of 60 nanometers in the aqueous phase solution for 2 minutes, and then The polysulfone ultrafiltration support membrane is taken out, and excess aqueous phase solution on its surface is removed.

[0032] (2) trimesoyl chloride is added in the Isopar G type mixed hydrocarbon, and it is prepared into a 0.2w / v% oil phase solution, and then adding nano-silicon oxide balls with a size of 230 nanometers to make its concentration reach 0.06w / v %, and formed a uniform oil phase solution by ultrasonic treatment for 40 minutes; then the polysulfone ultrafiltra...

Embodiment 2

[0035] The nano-silica sphere / polypiperazine amide nanocomposite nanofiltration membrane was prepared by the method in Example 1, the only difference being that the immersion time of the polysulfone ultrafiltration support membrane in the aqueous phase solution was 0.5 minutes.

Embodiment 3

[0037]The nano-silica sphere / polypiperazine amide nanocomposite nanofiltration membrane was prepared by the method in Example 1, the only difference being that the immersion time of the polysulfone ultrafiltration support membrane in the aqueous phase solution was 20 minutes.

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Abstract

The invention belongs to the technical field of water treatment membranes, and discloses a nanosized silica sphere / polypiperazine-amide nano composite nanofiltration membrane and a preparation method thereof. The nanosized silica sphere / polypiperazine-amide nano composite nanofiltration membrane is prepared by forming a polypiperazine-amide macromolecule functional separation layer embedded with nanosized silica spheres on an ultrafiltration support membrane. The nanosized silica spheres can be effectively introduced into the polypiperazine-amide macromolecule layer, so that the nano composite nanofiltration membrane with excellent properties can be prepared. Relatively strong oxygen bands are arranged between nanosized silica and polypiperazine-amide macromolecules of the nano composite nanofiltration membrane disclosed by the invention, so that the nanosized silica spheres can be uniformly and stably dispersed in the polypiperazine-amide macromolecule functional separation layer, the water flux of the nano composite nanofiltration membrane can be remarkably improved, good separation stability and membrane surface hydrophilicity are achieved, and meanwhile the nanosized silica sphere / polypiperazine-amide nano composite nanofiltration membrane is simple in preparation method, high in operability, low in production cost and good in industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment membranes, and in particular relates to a nanocomposite nanofiltration membrane and a preparation method thereof. Background technique [0002] The composite nanofiltration membrane is mainly composed of three parts: a separation layer, a support layer and a non-woven fabric layer, and the separation layer is a functional layer that plays a role in separation. Polypiperazinamide composite nanofiltration membranes can be used in water softening, seawater desalination, dye removal, food processing, and wastewater treatment, and have broad application prospects. Therefore, this material has attracted widespread attention from membrane material manufacturers and research institutions. focus on. Polypiperazine amide composite nanofiltration membranes are usually obtained by interfacial polymerization using trimesoyl chloride and piperazine as the main raw materials. The interfacial polymeriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D69/12B01D67/00C02F1/44
Inventor 李强张梦李桂生潘献辉吴非洋于慧
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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