Method for preparing ultra filtration membrane in hollow fiber made from PVC with high flux

A polyvinyl chloride and ultrafiltration membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as little research, achieve excellent performance, wide industrial application prospects, high-purity water permeability. Effect

Inactive Publication Date: 2003-05-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on PVC ultrafiltration membranes is limited to flat membranes, and there are few studies on hollow fiber PVC ultrafiltration membranes.

Method used

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  • Method for preparing ultra filtration membrane in hollow fiber made from PVC with high flux
  • Method for preparing ultra filtration membrane in hollow fiber made from PVC with high flux
  • Method for preparing ultra filtration membrane in hollow fiber made from PVC with high flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh raw materials according to the following weight percentages, PVC (1300): 14%; DMAC: 81% and PVP: 5% are mixed with film-making solution, and its process is: first add 5% PVP in 81% DMAC and stir to dissolve, wait After the PVP is completely dissolved, add 14% PVC and stir to dissolve. Leave it for 72 hours at a temperature of 25°C. The prepared film-making solution was poured into the material tank and left to stand for 24 hours for degassing. The size of the nozzle is 0.5 mm in diameter of the inner tube 2, and 0.8 mm in the inner diameter of the outer tube 1. The film-forming liquid is sprayed from the annular gap of the nozzle, and the temperature is controlled at 25°C. M / min coiling speed for winding bundles into filaments. The inner gel medium is injected into the center of the nascent hollow fiber with a metering pump to form a hollow. The inner gel medium is 95% DMAC aqueous solution, and the outer gel bath is pure water. 25°C. The spun hollow fiber mem...

Embodiment 2

[0029] According to the preparation process and conditions described in Example 1, PVC (1300): 14%; DMAC: 81% and PVP: 5% were prepared as a film-forming solution. Preparation process as described in Example 1. Except for changing the inner gel solution into pure water, other process conditions were the same as in Example 1 to produce a hollow fiber membrane, which was treated and assembled into an ultrafilter with the same protection.

Embodiment 3

[0031] According to the preparation process and conditions described in Example 1, but the film-making liquid adopts the following weight percentages, PVC (1300): 12%; DMAC: 81% and PVP: 5%, others are the same as Example 1, repeat the process of Example 1 to obtain a hollow fiber membranes and assembled into ultrafilters.

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Abstract

A high-through put ultrafilter membrane of hollow polyvinyl chloride fibres is prepared through mixing polyvinyl chloride, solvent and additive, stirring, and spraying it along with internal gelatinizing medium in the gelatinizing bath using distilled water as gelatinizing medium to obtain target membrane. Its advantages are high porosity up to 90% or more and high throughput (400 L / h.sq.m for purified water).

Description

technical field [0001] The invention relates to a preparation method of a polymer ultrafiltration membrane, in particular to a preparation method of a polyvinyl chloride hollow fiber ultrafiltration membrane. Background technique [0002] At present, with the rapid development of membrane separation technology, membrane technology has been widely used in biological engineering, food engineering, environmental protection engineering and many chemical processes. Due to the ultrafiltration membrane and its separation technology can be operated at normal pressure, normal temperature or low temperature, no phase change, low energy consumption, no change in the physical and chemical properties of the filtrate, and can be concentrated and separated at the same time, it is gradually replacing the traditional separation process. Widely used in pretreatment, wastewater treatment, separation, concentration and purification of enzyme preparations, vaccines, drugs, genetically engineere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D71/30
Inventor 许振良许坚
Owner EAST CHINA UNIV OF SCI & TECH
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