Preparing method of zinc-coordination organic nano particle hybridization polyamide membrane

A nanoparticle and polyamide membrane technology, which is applied in the field of membrane separation, can solve the problems of complex synthesis and modification methods of inorganic nanoparticles, limited scale and repeated and stable preparation.

Active Publication Date: 2019-04-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis and modification methods of inorganic nanoparticles are complex, and the dispersion of nanomaterials and their compatibility with polyamide-based membranes limit their large-scale and repeatable preparation.

Method used

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  • Preparing method of zinc-coordination organic nano particle hybridization polyamide membrane

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preparation example Construction

[0013] A method for preparing a zinc-coordinated organic nanoparticle hybrid polyamide film comprises the following steps:

[0014] 1) With polyamine as the monomer molecule, zinc nitrate hexahydrate as the metal ion compound, and dopamine as the biomimetic binder, it is configured into a water phase mixed solution, which is dip-coated on the surface of the porous support membrane, and then treated with 2-methylimidazole Aqueous solution immersion treatment, in-situ formation of zinc-containing coordination organic nanoparticles nascent film on the surface of the porous support film;

[0015] 2) Dissolving polyacyl chloride monomers in organic solvents to form an organic phase solution, dip-coating it on the surface of the nascent film loaded with zinc-coordinated organic nanoparticles to carry out interfacial cross-linking reaction, thermal curing treatment, and finally removing After washing with ion water, a hybrid polyamide membrane containing zinc-coordinated organic nano...

Embodiment 1

[0019] Take 0.2g of piperazine, 0.1g of zinc nitrate hexahydrate and 0.05g of dopamine dissolved in 100g of deionized water to form a water phase mixed solution, which is dip-coated on the surface of polysulfone ultrafiltration membrane at 15°C for 60 minutes, and then in 15 Under the temperature of 0.5% by mass percent, the 2-methylimidazole aqueous solution was dipped for 100 minutes to obtain a zinc-containing coordination organic nanoparticle nascent film, and then immersed in a 0.1% by mass percent trimesoyl chloride-n-hexane solution In the process, the interfacial crosslinking reaction was carried out at 15°C for 10 minutes, and finally cured at 45°C for 40 minutes. After washing with deionized water, a hybrid polyamide film containing zinc-coordinated organic nanoparticles was obtained.

[0020] Zinc-coordinated organic nanoparticle hybrid polyamide film at 25°C, under 0.2MPa pressure, for 1g.L -1The separation result of Congo red and basic blue organic dye solution is...

Embodiment 2

[0022] Dissolve 2g of piperazine, 1g of zinc nitrate hexahydrate and 0.5g of dopamine in 100g of deionized water to form a mixed aqueous solution, dip-coat it on the surface of polysulfone ultrafiltration membrane at 25°C for 10 minutes, and then The 2-methylimidazole aqueous solution with a mass percentage concentration of 5% was dipped for 10 minutes to obtain a zinc-containing coordination organic nanoparticle nascent film, and then immersed in a 1% trimesoyl chloride n-hexane solution, The interfacial crosslinking reaction was performed at 25°C for 2 minutes, and finally cured at 65°C for 10 minutes. After washing with deionized water, a hybrid polyamide film containing zinc-coordinated organic nanoparticles was obtained.

[0023] Zinc-coordinated organic nanoparticle hybrid polyamide film at 25°C, under 0.2MPa pressure, for 1g.L -1 The separation result of Congo red and basic blue organic dye solution is: the water flux is 98.5L.m -2 .h -1 .bar -1 , the rejection rate ...

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Abstract

The invention discloses a preparing method of a zinc-coordination organic nano particle hybridization polyamide membrane. An aqueous-phase mixed solution is prepared with polyamine as a monomer molecule, zinc nitrate hexahydrate as a metal ion compound and dopamine as a bionic adhesion agent; the surface of a porous supporting membrane is coated with the aqueous-phase mixed solution, then the aqueous-phase mixed solution is immersed by an aqueous solution containing 2-methylimidazole for in-situ formation of zinc-coordination organic nano particles, and finally, the zinc-coordination organic nano particle hybridization polyamide membrane is prepared through polybasic acyl chloride monomer interface crosslinking. The unique nano microstructure of the zinc-coordination organic particles is utilized, a nano channel facilitating water permeation and selective holding of organic matter molecules is formed in the polyamide membrane, and high water permeability and stable separation selectivity can be obtained. The preparing method is simple and feasible, the particles are formed in situ in the membrane preparing process and uniformly and stably distributed in the membrane, the preparingcost is low, and the preparing method has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of membrane separation, and in particular relates to a preparation method of a zinc-coordinated organic nanoparticle hybrid polyamide membrane. Background technique [0002] Membrane separation technologies generally include microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward osmosis, and membrane bioreactors. As a new, energy-saving and environmentally-friendly technology, membrane separation is playing an increasingly important role in seawater desalination, drinking water purification, wastewater treatment, separation of industrial substances, and resource recovery. Membrane material is the core of the development of membrane separation technology and the key to its separation performance. Since Cadotte etc. prepared the first polyamide membrane by interfacial polymerization in 1972, commercialized nanofiltration membranes, reverse osmosis membranes and forward osmosis membranes have been do...

Claims

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Application Information

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IPC IPC(8): B01D65/10B01D67/00B01D69/10B01D69/12B01D71/56B01D61/14B82Y40/00
CPCB01D61/145B01D65/10B01D67/0079B01D69/10B01D69/125B01D71/56B01D2323/30B01D2323/46B82Y40/00
Inventor 计艳丽顾冰心安全福高从堦
Owner ZHEJIANG UNIV OF TECH
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