Preparation method for homogeneously-enhanced polyvinylidene fluoride hollow fiber membrane

A polyvinylidene fluoride, homogenous reinforcement technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of poor interface bonding strength, rupture of membrane filaments, and impact on effluent water quality, etc., to improve mechanical properties, interface Good bonding strength and improved hydrophilicity
CN102600733AActive Publication Date: 2012-07-25TIANJIN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN POLYTECHNIC UNIV
Publication Date
2012-07-25

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Abstract

The invention discloses a preparation method for a homogeneously-enhanced polyvinylidene fluoride hollow fiber membrane. The preparation method comprises the following process steps of: firstly, preparing a reinforced body base membrane and taking a polyvinylidene fluoride hollow fiber membrane as the reinforced body base membrane; secondly, preparing a polyvinylidene fluoride membrane casting solution comprising the following components in percentage by mass: 6-20 percent of polyvinylidene fluoride, 0.6-2 percent of hydrophilic polymer or hydrophilic inorganic particle, 6-10 percent of pore-forming agent and 68-87.4 percent of solvent; mixing various components in a water bath of 70-90 DEG C, stirring the components for 3-4 hours and dissolving; and vacuum defoaming to obtain the membrane casting solution; and thirdly, preparing a homogeneously-enhanced membrane; uniformly coating the membrane casting solution to the surface of the reinforced body base membrane through a spinneret for spinning; then spinning the reinforced body base membrane to form a membrane under the traction of a silk guide roller; and solidifying the membrane with ultrafiltration water through an air gap with the length being 5-20cm to obtain the homogeneously-enhanced membrane, wherein the traction speed is 5-25cm / min.
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Description

technical field

[0001] The invention relates to a hollow fiber membrane preparation technology, in particular to a preparation method of a homogeneously reinforced polyvinylidene fluoride hollow fiber membrane. Background technique

[0002] In the modern society that advocates green environmental protection and sustainable development, the combination of membrane technology and traditional activated sludge treatment technology to form membrane bioreactor (MBR) technology is the key technology to realize the utilization of sewage resources, and it is the most promising technology in the 21st century. One of the promising high-tech.

[0003] Polyvinylidene fluoride (PVDF) has strong anti-pollution ability, good mechanical properties, excellent anti-ultraviolet and weathering resistance, strong chemical stability (not easy to be corroded by acids, alkalis, strong oxidants and halogens, etc., and resistant to many common organic compounds. Solvent) and other characteristics hav...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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