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Porous membrane with three-dimensional interpenetrating polymer network and preparation method

A fiber membrane and fiber technology, applied in the field of polyvinylidene fluoride porous hollow fiber membrane and its manufacturing method, can solve the problems of inability to meet the requirements of industrial production, unsatisfactory effect of ultra- and microfiltration membranes, and uneven distribution of membrane pore sizes , to achieve the effects of good chemical cleaning resistance and hydrophilicity, excellent anti-pollution ability, and good anti-pollution characteristics

Inactive Publication Date: 2010-11-24
苏州膜华材料科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the commercialized ultra- and microfiltration membranes are not ideal and cannot meet the requirements of industrial production.
On the other hand, at present, most ultra- and microfiltration membranes are prepared by non-solvent-induced phase separation. Most of the produced membranes contain finger-shaped large cavity structures, and the membrane pore size distribution is uneven and the strength is poor. It is easy to break when used in sewage. Membrane life is short, not suitable for application in membrane bioreactor process

Method used

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  • Porous membrane with three-dimensional interpenetrating polymer network and preparation method
  • Porous membrane with three-dimensional interpenetrating polymer network and preparation method
  • Porous membrane with three-dimensional interpenetrating polymer network and preparation method

Examples

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Embodiment 1

[0051] A blend polymer composed of 38% by mass of PVDF drying resin and 2.7% by mass of polyoxyethylene drying resin is added to a mixed solvent composed of glycerol diacetate and diglyme, Wherein the mass percentage of glycerol diacetate is 35.6%, and the mass percentage of diethylene glycol methyl ether is 23.7%. The above mixture was added into a stirred tank, stirred and dissolved at a temperature of 170° C. and a rotational speed of 120 rpm for 24 hours, and then cooled and granulated in air to obtain a blended raw material. The previously prepared blend was fed into the twin-screw extruder at a feed rate of 8 kg / h. The temperatures in zones 1-8 of the extruder were 110°C, 125°C, 140°C, 155°C, 170°C, 170°C, 170°C, and 160°C, respectively, and the screw speed was 120 rpm. After the mixed material is melted and extruded in a twin-screw machine, it is extruded through a filter and a spinning pump into a four-hole annular die to make a hollow as-spun fiber. The outer diamete...

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Abstract

The invention relates to a polyvinylidene fluoride porous hollow fibrous membrane and a preparation method thereof. The membrane comprises the following components in percentage by mass: 25 to 45 percent of polyvinylidene fluoride (PVDF) serving as a first polymer P1, 0 to 3 percent of polyethylene oxide (PEO) serving as a second polymer P2, 32 to 52 percent of glycerin diacetate serving as a first diluent D1 and 20 to 24 percent of diethylene glycol monomethylether serving as a second diluent D2. The PVDF hollow fibrous ultra filter membrane prepared by the method has high chemical stability, high pollution resistance and high strength; and the membrane product with the high performance can be provided for an MBR process.

Description

technical field [0001] The invention relates to a polyvinylidene fluoride (PVDF) porous hollow fiber membrane and a preparation method thereof, in particular to a polyvinylidene fluoride (PVDF) porous hollow fiber membrane with a three-dimensional interpenetrating network and a preparation method thereof. Background technique [0002] Membrane bioreactor process (MBR) is a new and efficient sewage treatment technology, which can realize biocatalytic reaction and separation of water and degraded substances at the same time, so that water resources can be regenerated and water quality standards can be realized. It is a contemporary advanced, high-efficiency and low-energy-consumption wastewater advanced treatment and new technology for regeneration and reuse. Among them, the preparation of ultrafiltration membranes and microfiltration membranes with high strength, good anti-pollution performance and low cost is the core technology of membrane bioreactor technology. However, m...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/34B01D67/00
Inventor 洪耀良奚韶锋陈翠仙
Owner 苏州膜华材料科技有限公司
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