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Filteration material for desalination

A filter material and desalination technology, applied in special compound water treatment, water/sludge/sewage treatment, fiber chemical characteristics, etc., to achieve high-efficiency desalination filtration effect

Active Publication Date: 2015-02-04
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the known desalination filter materials are mainly nonporous polymeric thin films, which need to be operated under high pressure conditions

Method used

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  • Filteration material for desalination
  • Filteration material for desalination
  • Filteration material for desalination

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0039] Preparation example 1 makes polyacrylonitrile (PAN) nanofiber

[0040] Take 30g polyacrylonitrile (polyacrylonitrile, PAN) macromolecule, after dissolving 200g N, N-dimethyl acetamide (N, N-dimethyl acetamide, DMAc), utilize electrospinning method to prepare nanofiber cotton net: Voltage 39kV , total throughput 1000μL / min, air pressure 2.8kg / cm 2 , The distance from the spinning nozzle to the receiving belt is 25cm, and the diameter of nanofibers can be made from about 280nm-380nm, and the basis weight is 30-60g / m 2 nanofiber cotton web.

preparation example 2

[0041] Preparation example 2 prepares ionic polymer nanofiber (ionic polymer is called for short poly E)

[0042] Take 10g of sodium styrene sulfonate, 40g of 4-vinylpyridine, 7g of styrene, 50g of deionized water and 50g of isopropanol, put them into a reaction flask, and heat to 70°C under nitrogen. After getting 0.2g potassium persulfate (KPS) to be dissolved in 10mL deionized water as initiator, after injecting in the reaction bottle, continue to stir for 3 hours, obtain 50.1g ionic macromolecule (poly E) through precipitation purification step afterwards, productive rate is 88 %.

[0043] After that, the ionic polymer was dissolved in 200g N, N-dimethyl acetamide (N, N-dimethyl acetamide, DMAc), and the nanofiber cotton web was prepared by electrospinning: voltage 39kV, total throughput 1200μL / min , air pressure 5kg / cm 2 , The distance from the spinning nozzle to the receiving belt is 20cm, and the diameter can be about 70nm-120nm, and the basis weight of the cotton web...

Embodiment 1

[0046] Place the PAN nanofiber / PET of Preparation Example 1 in the water phase (m-phenylenediamine (MPD) / water=2 / 98 (w / w)) for 3 minutes, take it out and suck it in, and place it in the oil phase (benzenetriamine) formyl chloride (TMC) / hexane=0.1 / 100 (w / w)) for 30 seconds, and then enter into an oven at 70° C. for 10 minutes to form a hydrophobic layer on the nanofiber layer.

[0047] Afterwards, the PolyE of Preparation Example 2 was dissolved in an ethanol solution (5wt%) to coat the composite material, and then placed in an oven at 70°C for 20 minutes to conduct a 30000ppm NaCl desalination test.

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Abstract

The disclosure discloses a filtration material for desalination, including: a support layer; a nanofiber layer formed on the support layer; a hydrophobic layer formed on the nanofiber layer; and a hydrophilic layer formed on the hydrophobic layer. The nanofiber layer includes ionic polymer, polyvinyl alcohol (PVA), polyacrylonitrile, (PAN), polyethersulfone (PES) or polyvinglidene fluoride (PVDF). The hydrophobic layer includes polypropylene (PP), polyvinglidene fluoride (PVDF), poly-dimethylsiloxane (PDMS) or epoxy.

Description

technical field [0001] The invention relates to a desalination filter material, in particular to a desalination filter material with a multi-layer structure. Background technique [0002] Major factories all over the world are actively developing various desalination filter materials used in seawater, industrial water and wastewater. In addition to being able to efficiently treat salt in water and hope to reduce operating pressure, the cost of water purification can be reduced due to low energy consumption. [0003] US Patent No. 5,464,538 proposes a filter material, which is made of a filter material with high flux through cross-linking reaction of vinyl monomers. [0004] US Pat. No. 5,755,964 proposes a filter material that treats the surface of a reverse osmosis membrane (Reverse Osmosis, RO) with an amine compound to increase the wetting of the RO membrane and increase the flux of the RO membrane. [0005] However, known desalination filter materials are mainly nonporo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D71/00B01D67/00C02F1/44
CPCC02F1/44B01D71/38B01D69/12D01F6/18D01D5/003D01F6/42B01D69/125B01D2323/39C02F2305/08B01D71/56B01D2323/30C02F2103/08B01D67/0006B01D2323/40Y02A20/131
Inventor 陈乃荣张贵钱郑淑蕙蔡韦政
Owner IND TECH RES INST