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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  • Abstract
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  • 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 nanom

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

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Example Embodiment

[0013] A preparation method of zinc coordination organic nanoparticle hybrid polyamide film includes the following steps:

[0014] 1) Using polyamine as the monomer molecule, zinc nitrate hexahydrate as the metal ion compound, and dopamine as the biomimetic binder, it is configured into an aqueous mixed solution, which is dipped and coated on the surface of the porous support membrane, and then treated with 2-methylimidazole Aqueous immersion treatment to form a nascent membrane of zinc-containing coordinated organic nanoparticles on the surface of the porous support membrane;

[0015] 2) Dissolve the polyvalent acid chloride monomer in an organic solvent to form an organic phase solution, and dip it on the surface of the nascent film loaded with zinc coordination organic nanoparticles for interfacial crosslinking reaction, thermal curing treatment, and finally After washing with ionized water, a hybrid polyamide membrane containing zinc coordinated organic nanoparticles is obtaine...

Example Embodiment

[0018] Example 1:

[0019] Take 0.2g piperazine, 0.1g zinc nitrate hexahydrate and 0.05g dopamine dissolved in 100g deionized water to prepare an aqueous mixed solution, and dip it on the surface of the polysulfone ultrafiltration membrane at 15°C for 60 minutes, and then Immersed in a 0.5% mass percentage 2-methylimidazole aqueous solution at ℃ for 100 minutes to obtain a zinc-containing coordinated organic nanoparticle primordial film, and then dipped into a 0.1% mass percentage of trimellitic chloride n-hexane solution In the interfacial cross-linking reaction at 15°C for 10 minutes, and finally curing at 45°C for 40 minutes, after washing with deionized water, a hybrid polyamide film containing zinc-containing coordination organic nanoparticles is obtained.

[0020] The zinc-containing coordination organic nano-particle hybrid polyamide membrane is at 25℃, 0.2MPa pressure, for 1g.L -1 The separation result of the Congo red and basic blue organic dye solution is: the water flux ...

Example Embodiment

[0021] Example 2:

[0022] Take 2g piperazine, 1g zinc nitrate hexahydrate and 0.5g dopamine dissolved in 100g deionized water to prepare an aqueous mixed solution, immerse it on the surface of the polysulfone ultrafiltration membrane at 25℃ for 10 minutes, and then at 25℃ Impregnation treatment with 5% by mass concentration of 2-methylimidazole aqueous solution for 10 minutes to obtain zinc-containing coordinated organic nanoparticle primordial film, and then immersed in 1% by mass concentration of trimellitic chloride n-hexane solution, The interfacial crosslinking reaction was carried out 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-containing coordination organic nanoparticles was obtained.

[0023] The zinc-containing coordination organic nano-particle hybrid polyamide membrane is at 25℃, 0.2MPa pressure, for 1g.L -1 The separation result of the Congo red and basic blue organic dye ...

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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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