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Grapheme oxide quantum dot function sphere nanoparticle, polyamide reverse osmosis membrane/nanofiltration membrane modified by nanoparticle and preparation method

A technology of graphene quantum dots and nanoparticles, applied in the field of membrane separation, to achieve the effects of improving water flux, increasing membrane desalination rate, and simple manufacturing process

Active Publication Date: 2016-07-20
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the nanochannels constructed by graphene, graphene oxide or graphene oxide quantum dots need to be aligned in the preparation of nanofiltration membranes or reverse osmosis membranes, and provide a graphite oxide with special-shaped nanochannels ene quantum dot functional spherical nanoparticles, and a modified polyamide reverse osmosis membrane / nanofiltration membrane based on the above functional spherical nanoparticles

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  • Grapheme oxide quantum dot function sphere nanoparticle, polyamide reverse osmosis membrane/nanofiltration membrane modified by nanoparticle and preparation method

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preparation example Construction

[0015] The preparation method of the graphene oxide quantum dot functional ball is as follows: slowly adding the graphene quantum dot dispersion liquid into the positively charged nano particle dispersion liquid, and then centrifuging, precipitating, separating and purifying.

[0016] Further, the positively charged nanoparticles are aminated nano-silver particles, aminated nano-zinc particles, aminated nano-copper particles, aminated nano-gold particles, aminated nano-silica particles, amine-based One or more of nano titanium dioxide particles and aminated nano chitosan particles.

[0017] The modified polyamide reverse osmosis membrane / nanofiltration membrane based on the above-mentioned functional spherical nanoparticles involved in the present invention is to inlay the above-mentioned graphene oxide quantum dot functional spherical nanoparticles in the polyamide separation layer of the reverse osmosis / nanofiltration membrane.

[0018] The preparation method of the polyamid...

Embodiment 1

[0022] Take 0.5g of silver nanoparticles and disperse them in 100mL of absolute ethanol, add 1mL of 3-aminopropyltriethoxysilane under the condition of stirring at room temperature, continue to react for 6 hours, centrifuge and wash for many times to obtain aminated nano-particles Silver particle dispersion (about 0.5g / 100mL); disperse graphite oxide in ultrapure water, ultrasonically disperse for 5 hours, and centrifuge to take the supernatant to obtain graphene oxide quantum dots; Slowly add about 0.001mg / mL graphene oxide quantum dot dispersion solution 50mL dropwise into the silver particle dispersion liquid, after continuous vigorous stirring for 1 hour, gradually reduce the stirring speed until it stops, centrifuge and wash with water to obtain graphene oxide dispersed in the water phase Quantum dot functional spherical nanoparticles. Soak the porous bottom film in the water phase for 0.5 minutes, the concentration of phenylenediamine in the water phase is 0.5wt%, and th...

Embodiment 2

[0024] Take 0.5g of silver nanoparticles and disperse them in 100mL of absolute ethanol, add 1mL of 3-aminopropyltriethoxysilane under the condition of stirring at room temperature, continue to react for 6 hours, centrifuge and wash for many times to obtain aminated nano-particles Silver particle dispersion (about 0.5g / 100mL); disperse graphite oxide in ultrapure water, ultrasonically disperse for 5 hours, and centrifuge to take the supernatant to obtain graphene oxide quantum dots; Slowly add about 0.001mg / mL graphene oxide quantum dot dispersion solution 50mL dropwise into the silver particle dispersion liquid, after continuous vigorous stirring for 1 hour, gradually reduce the stirring speed until it stops, centrifuge and wash with water to obtain graphene oxide dispersed in the water phase Quantum dot functional sphere nanoparticles; soak the porous bottom film in the water phase for 0.5 minutes, the concentration of phenylenediamine in the water phase is 1.5wt%, and the co...

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Abstract

The invention discloses a grapheme oxide quantum dot function sphere nanoparticle, a polyamide reverse osmosis membrane / nanofiltration membrane modified by the nanoparticle and a preparation method. The grapheme oxide quantum dot function sphere nanoparticle comprises a sphere kernel taking positive charge nanoparticles as supports and grapheme oxide quantum dots wrapping the sphere kernel layer by layer, and is prepared by slowly adding grapheme oxide quantum dot dispersion liquid into positive charge nanoparticle dispersion liquid prior to centrifugal precipitation, separation and purification. The function sphere nanoparticle based modified polyamide reverse osmosis membrane / nanofiltration membrane is prepared by inlaying the grapheme oxide quantum dot function sphere nanoparticle in a reverse osmosis membrane / nanofiltration membrane polyamide separation layer, and can be applied to the fields of seawater and brackish water desalination, seawater and brackish water softening, drinking water treatment, advanced wastewater treatment and the like. The spherical shell type special-shaped nanochannel is provided with multiple inlets and outlets, and water flux of the membrane can be increased.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a graphene oxide quantum dot functional spherical nanoparticle, a modified polyamide reverse osmosis membrane / nanofiltration membrane and a preparation method of the membrane. Background technique [0002] Whoever masters membrane technology will master the future of chemical industry. Membrane separation technology has the advantages of high efficiency, energy saving, environmental protection, and wide application range. and pharmaceutical industries are playing an increasingly important role. Common membrane separation technologies include microfiltration, ultrafiltration, nanofiltration, reverse osmosis, electrodialysis, pervaporation, membrane distillation, membrane bioreactor, etc. Among them, reverse osmosis and nanofiltration are key technologies for sustainable utilization of water resources. play an increasingly important role. [0003] The inte...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D67/00B01D61/02C02F1/44
CPCY02A20/131B01D71/56B01D61/025B01D61/027B01D67/0002C02F1/441C02F1/442
Inventor 高学理王剑孙海静徐源王群魏怡高从堦
Owner OCEAN UNIV OF CHINA
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