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Preparation method of enhanced polymer composite membrane preprocessed by reinforced weaving tube

A polymer and composite membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as reducing the formation of surface coupling layers and affecting the effect of pre-coating

Active Publication Date: 2013-03-20
HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical additives (such as oil) in the long-fiber yarn used in the preparation of the braided tube will affect the effect of the pre-coating and reduce the formation of the surface coupling layer

Method used

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  • Preparation method of enhanced polymer composite membrane preprocessed by reinforced weaving tube
  • Preparation method of enhanced polymer composite membrane preprocessed by reinforced weaving tube
  • Preparation method of enhanced polymer composite membrane preprocessed by reinforced weaving tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add polyvinylidene fluoride (10% by mass), N-N dimethylacetamide (80% by mass), polyvinylpyrrolidone (9% by mass), and water (1% by mass) at 60°C Stir in the kettle for 6 hours, filter, vacuumize and stand still for degassing for 6 hours to obtain the casting solution;

[0031] 2) Sintering of the woven tube: the hollow fiber woven tube (polyester braided tube, composed of 96 filaments, and the long fiber yarn is 200D) is passed through the sintering heating tube at a passing speed of 20 m / min, and the temperature of the sintering heating tube is 150 °C , the length of the sintered tube is 40 cm;

[0032] 3) Soak the sintered polyester woven tube in 10% N,N-2 methylformamide solution for 1 second to elute the chemical additives on the surface, and the elution temperature is 20°C;

[0033] 4) Pre-coat the surface of the eluted woven tube with a trifluoropropyltrimethoxysilane solution with a mass fraction of 10%, the pre-coating temperature is 20°C, and the coating t...

Embodiment 2

[0038] 1), polyethersulfone (mass percentage 25%), sulfolane and triacetin mixed solvent (mass percentage 60%, the mass ratio of the two is 4:3), polyethylene glycol (mass percentage 10%), propane Triol (5% by mass), stirred in a feeding kettle at 100°C for 18 hours, filtered, vacuumed, kept warm and static for 24 hours to obtain the casting solution;

[0039] 2) Sintering of the woven tube: the hollow fiber woven tube (which is a glass fiber braided tube, composed of 48 fiber filaments, and the long fiber yarn is 100D) passes through the sintering heating tube at a passing speed of 2 m / min, and the temperature of the sintering heating tube is 250 ℃, the length of the sintered tube is 10 cm;

[0040] 3) Soak the sintered polyester woven tube in 50% N,N-2 methylacetamide solution for 20 seconds to elute the chemical additives on the surface, and the elution temperature is 30°C;

[0041] 4) Pre-coat the surface of the eluted woven tube with a 2% perfluorooctylethyltrimethylsila...

Embodiment 3

[0046] 1), polyvinyl chloride (20% by mass), N-N dimethylacetamide (75% by mass), polyvinylpyrrolidone (2% by mass), ethylene glycol (3% by mass), at 65°C Stir in the feed kettle for 8 hours, filter, evacuate, keep warm and stand still for degassing for 8 hours to obtain the casting solution;

[0047] 2) Sintering of the woven tube: the hollow fiber woven tube (a nylon knitted tube, composed of 12 filaments, and the long fiber yarn is 50D);

[0048] Through the sintered heating tube, the passing speed is 10 m / min, the temperature of the sintered heating tube is 210°C, and the length of the sintered tube is 20 cm;

[0049] 3) Soak the sintered polyester woven tube in 30% sulfolane solution for 10 seconds to elute the chemical additives on its surface, and the elution temperature is 30°C;

[0050] 4) Pre-coat the surface of the eluted woven tube with a solution of polymethyl methacrylate with a mass fraction of 5%, the pre-coating temperature is 30°C, and the coating time is 10...

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Abstract

The invention discloses a preparation method of an enhanced polymer composite membrane preprocessed by a reinforced weaving tube. Compared with a traditional composite membrane preparation method, the preparation method adopts a reinforced weaving tube pro-processing technology according to which procedures of sintering, cleaning, pre-coating and finalizing the design are conducted sequentially in the preparing process. First, burrs on the surface of the weaving tube is removed through sintering a heating tube; second, additive chemicals on the surface of the weaving tube are washed through eluent; third, the surface is pre-coated through pre-coating agents; and finally, rolling balls and a supporting seat of the rolling balls are adopted to enable the weaving tube to be finalized in design. At last, polymer casting membrane solution is coated on the outer surface of the preprocessed weaving tube. A non-solvent induced phase separation or a thermally induced phase separation method is adopted to prepare the reinforced weaving tube type polymer composite membrane. The method has the advantages that the polymer membrane and the weaving tube are stronger in adhesive performance and better in appearance regularity.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer separation membrane materials, and in particular relates to a pretreatment of reinforced woven pipes and a preparation technology of polymer composite membranes. Background technique [0002] As a new type of separation, concentration, purification, and purification technology, membrane separation technology has unique advantages such as low energy consumption, high separation efficiency, no secondary pollution, direct amplification, and easy integration with other technologies. It has been widely used in the national economy. and all aspects of people's lives. In the membrane separation technology, the separation membrane is the core of the whole technology, and the selection of the membrane material and the optimization of the membrane manufacturing process are the key to the preparation of the separation membrane with excellent performance. Hollow fiber membranes are widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D71/68B01D69/12B01D67/00
Inventor 徐又一陈承赵经纬徐淑宏
Owner HANGZHOU TIAN CHUANG ENVIRONMENTAL TECH
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