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A carbon-containing composite semipermeable membrane for photoevaporating water, its preparation method and application

A composite semipermeable membrane and light evaporation technology, which is applied in the field of composite semipermeable membranes and carbon-containing composite semipermeable membranes, can solve the problems of high price of precious metal gold, achieve low cost, simple preparation, and good light-to-heat conversion effect

Active Publication Date: 2020-04-14
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the precious metal gold is too expensive, and carbon powder is relatively cheap. Therefore, it is of great significance to explore a carbon-containing composite film with low production cost, simple preparation process, and good light-to-heat conversion effect.

Method used

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  • A carbon-containing composite semipermeable membrane for photoevaporating water, its preparation method and application
  • A carbon-containing composite semipermeable membrane for photoevaporating water, its preparation method and application
  • A carbon-containing composite semipermeable membrane for photoevaporating water, its preparation method and application

Examples

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Effect test

Embodiment 1

[0032] Add 3.375 mg of graphitic carbon to 6 mL of the above semipermeable membrane precursor solution, and mechanically stir for 30 minutes to obtain a uniformly mixed mixed solution; take out 2 mL of the mixed solution, add it to the bottom of a 500 mL beaker with a diameter of 75 mm, and dry it naturally to form a film. Cut it into a circular film with a diameter of 35 mm, and prepare a carbon-containing composite semipermeable membrane with a thickness of about 100 μm and a content of 0.25 mg.

Embodiment 2

[0034] Add 6.75 mg of graphitic carbon to 6 mL of the above-mentioned semipermeable membrane precursor solution, and mechanically stir for 30 minutes to obtain a uniformly mixed mixed solution; take out 2 mL of the mixed solution, add it to the bottom of a 500 mL beaker with a diameter of 75 mm, and dry it naturally to form a film. Cut it into a circular film with a diameter of 35 mm, and prepare a carbon-containing composite semipermeable membrane with a thickness of about 100 μm and a content of 0.5 mg.

Embodiment 3

[0036] Add 13.5 mg of graphitic carbon to 6 mL of the above semipermeable membrane precursor solution, and mechanically stir for 30 minutes to obtain a uniformly mixed mixed solution; take out 2 mL of the mixed solution, add it to the bottom of a 500 mL beaker with a diameter of 75 mm, and dry it naturally to form a film. Cut it into a circular film with a diameter of 35 mm, and prepare a carbon-containing composite semipermeable membrane with a thickness of about 100 μm and a content of 1 mg.

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Abstract

The invention discloses a carbonaceous composite semi-permeable membrane used for water evaporation by light, a preparation method and a purpose thereof. The method comprises the following steps: 1) employing cellulose nitrate to prepare a semi-permeable membrane precursor solution; 2) adding the powdered carbon to the above precursor solution, violently stirring the materials to obtain a mixed solution; and 3) spreading the above mixed solution on a container having a flat bottom, naturally drying the solution to form the membrane, and preparing the carbonaceous composite semi-permeable membrane. The method has the advantages of simple process and low cost; the provided semi-permeable membrane has good photo-thermal transition effect, and has very good application prospect in the fields of water evaporation by light and seawater desalination.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, relates to a composite semipermeable membrane, in particular to a carbon-containing composite semipermeable membrane used for light-evaporated water, a preparation method thereof, and is expected to be obtained in the fields of light-evaporated water and seawater desalination Wide range of applications. Background technique [0002] At present, the increasing scarcity of fresh water resources has become one of the most serious global environmental problems. As we all know, nearly 97.5% of the world's water resources are non-drinking water such as seawater, and the population living within 70km from the sea accounts for more than 70% of the global population. Therefore, since the second half of the 20th century, seawater desalination technology has gradually been considered It is the most practical technology among many technologies to provide human beings with fresh water sources. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/20B01D69/12B01D67/00C02F1/14C02F1/44C02F103/08
CPCB01D67/0079B01D69/12B01D71/20C02F1/14C02F1/44C02F2103/08Y02A20/124Y02A20/131Y02A20/142Y02A20/212
Inventor 陶富军张玉良曹胜佳魏涛王凯董丽华尹衍升
Owner SHANGHAI MARITIME UNIVERSITY
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