CN103657447A - Polyvinylidene fluoride porous hollow-fiber membrane - Google Patents

Abstract

The invention discloses a polyvinylidene fluoride porous hollow-fiber membrane which is prepared through the following steps: 1) polyvinylpyrrolidone, polyvinylidene fluoride and polymethyl methacrylate are dried in a dryer at the drying temperature of 90 DEG C; 2) polyvinylpyrrolidone, polyvinylidene fluoride and polymethyl methacrylate are put in a stirring kettle, then vinyl trimethoxy silane, methylparaben, polyethyleneglycol and acetic acid-2-ethoxy ethyl ester are added into the stirring kettle, and the mixture is stirred and dissolved; 3) a uniformly dissolved high-molecular solution for preparing the membrane is cooled in air and pelletized to obtain a blend raw material; 4) a hollow-fiber membrane is extruded and formed; 5) a prepared hollow fiber intermediate is immersed in reverse osmosis water to remove an attenuant mixture in the membrane, wherein the water temperature is 85 DEG C and the immersion time is 6 hours; 6) the membrane is taken out and then dried at room temperature. The polyvinylidene fluoride porous hollow-fiber membrane provided by the invention has excellent chemical cleaning resistance and hydrophilcity, high strength, large flux, good toughness and excellent pollution resistance.

Description

Kynoar porous hollow fiber membrane

Technical field

The present invention relates to Kynoar porous hollow fiber membrane.

Background technology

But most commercial super, microfiltration membranes effect is all undesirable, cannot meet industrial requirement.At present super, the most employing phase separation of microfiltration membranes legal system is standby, the film of making comprises the large cavity structure of finger-like mostly, and membrane aperture skewness, intensity difference are used easy fracture of wire in sewage, membrane lifetime is short, is unsuitable for applying in membrane biological reactor process.

Summary of the invention

The object of the present invention is to provide a kind of Kynoar porous hollow fiber membrane, it has good chemically-resistant cleaning and hydrophily, intensity is high, flux is large, good toughness, there is good contamination resistance, be adapted at most in MBR using, can carry out advanced treating to city domestic sewage, industrial wastewater, reach middle water reuse water standard.

For achieving the above object, technical scheme of the present invention is a kind of Kynoar porous hollow fiber membrane of design, as follows preparation:

1) 4 mass parts polyvinylpyrrolidones, 55 mass parts Kynoar, 5 mass parts polymethyl methacrylates are dried in dryer, bake out temperature is 90 ℃;

2) drop in stirred tank, add again 1 mass parts vinyltrimethoxy silane, 2 mass parts methyl hydroxybenzoates, 10～15 mass parts polyethylene glycol, 25 mass parts acetic acid-2-ethoxy-ethyl esters, at the temperature of 165 ℃, carry out stirring and dissolving, speed of agitator is 150 revs/min;

3) by the masking Polymer Solution cooling granulation in air being uniformly dissolved, obtain blend raw material;

4) hollow-fibre membrane is extruded, is shaped;

5) the doughnut intermediate of making is immersed in reverse osmosis water, remove the diluent mixture in film, water temperature is 85 ℃, and leaching time is 6 hours;

6) after taking-up, at room temperature dry.

Advantage of the present invention and beneficial effect are: a kind of Kynoar porous hollow fiber membrane is provided, it has good chemically-resistant cleaning and hydrophily, intensity is high, flux is large, good toughness, there is good contamination resistance, be adapted at most in MBR using, can carry out advanced treating to city domestic sewage, industrial wastewater, reach middle water reuse water standard.

The specific embodiment

Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.

The concrete technical scheme of implementing of the present invention is:

Embodiment 1

A Kynoar porous hollow fiber membrane, as follows preparation:

1) 4 mass parts polyvinylpyrrolidones, 55 mass parts Kynoar, 5 mass parts polymethyl methacrylates are dried in dryer, bake out temperature is 90 ℃;

2) drop in stirred tank, add again 1 mass parts vinyltrimethoxy silane, 2 mass parts methyl hydroxybenzoates, 15 mass parts polyethylene glycol, 25 mass parts acetic acid-2-ethoxy-ethyl esters, at the temperature of 165 ℃, carry out stirring and dissolving, speed of agitator is 150 revs/min;

3) by the masking Polymer Solution cooling granulation in air being uniformly dissolved, obtain blend raw material;

4) hollow-fibre membrane is extruded, is shaped;

5) the doughnut intermediate of making is immersed in reverse osmosis water, remove the diluent mixture in film, water temperature is 85 ℃, and leaching time is 6 hours;

6) after taking-up, at room temperature dry.

Embodiment 2

A Kynoar porous hollow fiber membrane, as follows preparation:

1) 4 mass parts polyvinylpyrrolidones, 55 mass parts Kynoar, 5 mass parts polymethyl methacrylates are dried in dryer, bake out temperature is 90 ℃;

2) drop in stirred tank, add again 1 mass parts vinyltrimethoxy silane, 2 mass parts methyl hydroxybenzoates, 10 mass parts polyethylene glycol, 25 mass parts acetic acid-2-ethoxy-ethyl esters, at the temperature of 165 ℃, carry out stirring and dissolving, speed of agitator is 150 revs/min;

3) by the masking Polymer Solution cooling granulation in air being uniformly dissolved, obtain blend raw material;

4) hollow-fibre membrane is extruded, is shaped;

5) the doughnut intermediate of making is immersed in reverse osmosis water, remove the diluent mixture in film, water temperature is 85 ℃, and leaching time is 6 hours;

6) after taking-up, at room temperature dry.

Embodiment 3

A Kynoar porous hollow fiber membrane, as follows preparation:

1) 4 mass parts polyvinylpyrrolidones, 55 mass parts Kynoar, 5 mass parts polymethyl methacrylates are dried in dryer, bake out temperature is 90 ℃;

2) drop in stirred tank, add again 1 mass parts vinyltrimethoxy silane, 2 mass parts methyl hydroxybenzoates, 13 mass parts polyethylene glycol, 25 mass parts acetic acid-2-ethoxy-ethyl esters, at the temperature of 165 ℃, carry out stirring and dissolving, speed of agitator is 150 revs/min;

3) by the masking Polymer Solution cooling granulation in air being uniformly dissolved, obtain blend raw material;

4) hollow-fibre membrane is extruded, is shaped;

5) the doughnut intermediate of making is immersed in reverse osmosis water, remove the diluent mixture in film, water temperature is 85 ℃, and leaching time is 6 hours;

6) after taking-up, at room temperature dry.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (1)

1. Kynoar porous hollow fiber membrane, is characterized in that, as follows preparation:

1) 4 mass parts polyvinylpyrrolidones, 55 mass parts Kynoar, 5 mass parts polymethyl methacrylates are dried in dryer, bake out temperature is 90 ℃;

2) drop in stirred tank, add again 1 mass parts vinyltrimethoxy silane, 2 mass parts methyl hydroxybenzoates, 10～15 mass parts polyethylene glycol, 25 mass parts acetic acid-2-ethoxy-ethyl esters, at the temperature of 165 ℃, carry out stirring and dissolving, speed of agitator is 150 revs/min;

3) by the masking Polymer Solution cooling granulation in air being uniformly dissolved, obtain blend raw material;

4) hollow-fibre membrane is extruded, is shaped;

5) the doughnut intermediate of making is immersed in reverse osmosis water, remove the diluent mixture in film, water temperature is 85 ℃, and leaching time is 6 hours;

6) after taking-up, at room temperature dry.