Surface modification method for polymer separation membranes

A technology of surface modification and polymer membrane, which is applied in the direction of semipermeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of secondary pollution cost, poor controllability, waste of raw materials, etc., and achieve time saving and low cost , Improve the effect of hydrophilicity

Inactive Publication Date: 2018-12-25
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the layer-by-layer self-assembly (LBL) method also has defects such as poor controllability, serious waste of raw materials, and time-consuming operations.
Even a small membrane requires a large amount of polyelectrolyte aqueous solution, which will lead to secondary pollution and increase the cost

Method used

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  • Surface modification method for polymer separation membranes
  • Surface modification method for polymer separation membranes
  • Surface modification method for polymer separation membranes

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] Embodiment 1 The method for polymer separation membrane surface modification

[0033] The sodium chloride (NaCl) solid of 5.844 grams is added to the deionized water of 100 milliliters, fully stirs it to dissolve with glass rod, then, adds 0.1 gram polydiallyl dimethyl ammonium chloride ( PDADMAC) to prepare a positively charged polyelectrolyte solution of 1 gram per liter, and ultrasonically sound for 10 minutes after fully stirring; also add 5.844 grams of sodium chloride (NaCl) solid to 100 ml of deionized water, and fully stir with a glass rod Allow it to dissolve, then add 0.1 g of polystyrene sodium sulfonate (PSS) to this solution to prepare a 1 g / L negatively charged polyelectrolyte solution, stir thoroughly and ultrasonically for 10 minutes; fill the empty ink cartridge Ionized water, start the cleaning program of the printer for cleaning to get a clean ink cartridge and ink supply system; then fill the black ink cartridge with positively charged polydiallyl di...

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PUM

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Abstract

The invention discloses a surface modification method for polymer separation membranes. According to the surface modification method, the micro-droplet spraying technology for inkjet printers is utilized, a printing program is set through connection with a computer, surface modification of the polymer separation membranes by polyelectrolytes is controlled precisely, and surface hydrophilization and selective charging of the polymer separation membranes are realized. The surface modification method has the advantages of remarkable improvement in technological process, high controllability, lowcost, environmental protection, high anti-contamination performance and water passing capacity of modified separation membranes, and great significance in research on improvement in the anti-contamination performance of the separation membranes.

Description

technical field [0001] The invention relates to the technical field of membrane modification, in particular to a method for surface modification of polymer separation membranes. Background technique [0002] The shortage of water resources and the pollution of water environment are major problems that countries all over the world need to solve urgently. Efficient sewage treatment and resource utilization technology has become a key topic of research at home and abroad. Membrane separation technology, which originated in the 1960s, has many advantages such as low energy consumption, high efficiency, high integration, flexible movement, simple operation, and low secondary pollution. It is one of the most promising high-efficiency sewage treatment technologies. one. [0003] However, membrane fouling is a bottleneck problem that limits the widespread application of membrane wastewater treatment technology (Lee et al. 2004, Rana and Matsuura 2010). In the process of sewage tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/34B01D71/26B01D69/02B01D67/00
CPCB01D67/0002B01D69/02B01D71/26B01D71/34B01D71/68B01D2325/36
Inventor 林红军申利国曾千千余伟明
Owner ZHEJIANG NORMAL UNIVERSITY
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