Method for repeatedly extracting purified water by using hyaluronic acid-graphene oxide loaded polyvinyl alcohol sponge as forward osmosis drawing substance

A polyvinyl alcohol sponge, hyaluronic acid technology, applied in chemical instruments and methods, osmotic/dialysis water/sewage treatment, semi-permeable membrane separation, etc., can solve problems such as the limitation of aerogel mechanical properties, and achieve gel structure Stable and orderly, slowing down agglomeration and prolonging service life

Active Publication Date: 2019-04-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure the hydrophilicity and water-absorbing ability of the extract, the mechanical properties of the airgel are limited to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Use acetone and deionized water alternately to medical PVA sponge (density: 0.02g / cm 3 ,average pore size: 50μm, tensile strength>10N / cm 2 ) to rinse (3-5 times) to remove trace impurities in the sponge. Afterwards, the PVA sponge was pretreated by placing it in 30% H 2 o 2 In aqueous solution, 50 ° C, react for 2 hours, take out the sponge, and wash it repeatedly with deionized water to remove residual H 2 o 2 , and then place the PVA sponge in a vacuum oven and dry at 50°C. Afterwards, the dried pre-treated PVA sponge was cut into cylindrical blocks with the specifications of diameter: 2.25 cm, height: 1.5 cm. Prepare 20mL sodium hyaluronate (HA) (20mg) and graphene oxide (GO) (20mg) aqueous solution, and control the reaction solution with 2-(N-morpholino)ethanesulfonic acid (10mmol / L) aqueous solution (buffer solution) The pH is 6. Use the treated PVA sponge to absorb all the mixed solution, seal it and let it stand for 30min, then soak it in 40mL 1-ethyl-(3-d...

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PUM

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Abstract

The invention provides a method for repeatedly extracting purified water by using a hyaluronic acid-graphene oxide loaded polyvinyl alcohol sponge as forward osmosis drawing substance, and belongs tothe technical field of environmental pollution control engineering. A hydrophilic compression-resistant sponge is used as the forward osmosis drawing substance, and is applied to a forward osmosis process; water is drawn with a technique; the water production rate is high; and a regeneration method is simplified. The drawing substance prepared in the method keeps a higher water flux as the structural characteristic of the drawing substance can completely avoid reverse osmosis. In addition, based on a PVA substrate excellent in mechanical performance, the irreversible deformation of the drawingsubstance can be greatly relieved; and the service life of drawing substance is prolonged. The drawing substance is regenerated and regeneration and water production procedures can be completed within a short time by only needing simple mechanical compression. A substrate material is low-cost, is easy to obtain, and can be produced on a large scale, which is beneficial to the large-scale preparation and wide application of the drawing substance.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to the research of using hyaluronic acid-graphene oxide-loaded polyvinyl alcohol sponge as a forward osmosis extract to repeatedly absorb clean water, and in particular to the field of outdoor emergency and seawater desalination. Innovation for reusable extracts in osmotic devices. Background technique [0002] With economic development and population growth, problems such as water resource shortage and water pollution have become increasingly serious. Since the middle of the last century, microfiltration, ultrafiltration, nanofiltration and reverse osmosis technologies have been widely used in domestic sewage, treatment, drinking water treatment, groundwater recharge, etc., in order to change the unsustainable use of water resources. [0003] Forward osmosis is a process in which water molecules spontaneously transfer from the side of low osmotic pressure to the si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/38B01D67/00C02F1/44
CPCB01D67/0079B01D71/38B01D2325/36C02F1/445
Inventor 张捍民于明川
Owner DALIAN UNIV OF TECH
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