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Preparation method of reinforced sponge structure hollow fiber membrane

An enhanced, fiber membrane technology, applied in the direction of separation methods, chemical instruments and methods, membranes, etc., can solve the problems of low adhesion fastness of graphene and the performance of material recycling needs to be improved, so as to improve the interface bonding strength and improve oil-water The effect of separation efficiency

Active Publication Date: 2019-03-19
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, it has been reported that graphene is directly coated on the surface of sponge to prepare graphene-based oil-absorbing materials with good adsorption and oil-water selectivity. needs improvement

Method used

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  • Preparation method of reinforced sponge structure hollow fiber membrane
  • Preparation method of reinforced sponge structure hollow fiber membrane
  • Preparation method of reinforced sponge structure hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for preparing a reinforced sponge structure hollow fiber membrane, comprising the steps of:

[0038] 1) Using two-dimensional weaving technology to weave polyester fiber filaments into hollow tubes and use them as reinforcements;

[0039] 2) Take 62.73g of toluene diisocyanate (TDI) and 100g of polyether polyol (SEP-560D) and mix evenly, stir at a speed of 1000rpm / min at room temperature, continue to add 1.8g of silicone oil (L580), and stir strongly (1200rpm / min) to milky white, heat to 28~30℃, then add 0.24g stannous octoate and 0.37g triethylenediamine, keep constant stirring speed (1200rpm / min), continue stirring for 5~10s, make it mix evenly ; Obtain casting solution;

[0040] 3) Soaking the reinforcing body obtained in step 1) in distilled water for 10 s to fully wet the outer surface to obtain the pretreated reinforcing body;

[0041] 4) Co-extrude the pretreated reinforcement and casting solution from the annular spinneret by using the skin / core comp...

Embodiment 2

[0054] A method for preparing a reinforced sponge structure hollow fiber membrane, comprising the steps of:

[0055] 1) Using two-dimensional weaving technology to weave polyester fiber filaments into hollow tubes and use them as reinforcements;

[0056] 2) Mix 100g of polyether polyol (SEP-560D) and 1.1g of silicone oil evenly, stir rapidly (1200rpm / min) until milky white, heat to 28-30°C, add 0.2g of stannous octoate and 0.22g of triethylenedi Amine, keep a constant stirring speed (1200rpm / min), make it mix evenly, then add 43.6g toluene diisocyanate, continue to stir for 5-10s, mix evenly, and obtain the casting film;

[0057] 3) Soaking the reinforcing body obtained in step 1) in distilled water for 10 s to fully wet the outer surface to obtain the pretreated reinforcing body;

[0058] 4) Co-extrude the pretreated reinforcement and the casting solution from the annular spinneret by using the sheath / core composite spinning process, and the casting solution is evenly coated...

Embodiment 3

[0061] A method for preparing a reinforced sponge structure hollow fiber membrane, comprising the steps of:

[0062] 1) Using two-dimensional weaving technology to weave polyester fiber filaments into hollow tubes and use them as reinforcements;

[0063] 2) Mix 100g of polyether polyol (SEP-560D) and 0.6g of silicone oil evenly, stir rapidly (1200rpm / min) until milky white, heat to 28-30°C, add 0.15g of stannous octoate and 0.26g of triethylene diethylene For amine, keep a constant stirring speed (1200rpm / min) to make it evenly mixed; record it as component A;

[0064] 3.45g graphene is uniformly dispersed in 34.5g toluene diisocyanate (TDI), obtains B component;

[0065] Mix components A and B evenly to obtain a casting solution;

[0066] 3) Soaking the reinforcing body obtained in step 1) in distilled water for 10 s to fully wet the outer surface to obtain the pretreated reinforcing body;

[0067] 4) Co-extrude the pretreated reinforcement and the casting solution from th...

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Abstract

The invention discloses a preparation method of a hollow fiber membrane with an enhanced sponge structure, comprising the following steps: (1) knitting fiber filaments into hollow pipes as an enhanced body by a two-dimensional knitting technology or crochet knitting technology; (2) uniformly mixing a hydrophobic additive, toluene diisocyanate, organic silicon oil, an organic metal tin catalyst and an amine catalyst according to different addition orders to obtain casting film liquid; (3) soaking the enhanced body obtained in the step (1) in distilled water to sufficiently wetting the surface of the enhanced body to obtain the pretreated enhanced body; and (4) co-extruding the pretreated enhanced body and the casting film liquid from an annular spinneret by using a skin-core composite spinning process, and carrying out water blowing and aging to obtain the hollow fiber membrane with the enhanced sponge structure. The method uses an in-situ polymerization process to prepare the oil-absorbing hollow fiber porous membrane with a sponge structure, thereby improving the interface combination strength between a functional layer and a support layer, and increasing the oil-water separation efficiency.

Description

technical field [0001] The invention relates to the field of special separation technology, in particular to a method for preparing a reinforced hollow fiber membrane with a sponge structure. Background technique [0002] Polyurethane (PU) is the abbreviation of polyurethane. The main chain of the polymer compound contains more repeating unit carbamate groups (-NHCOO-) or groups (-NHCOONH-), which is a typical multi-block copolymerization things. All-water polyurethane foam uses water as a foaming agent, and uses water to react with isocyanate to generate CO 2 As a gas filler, the gas is filled into the melt produced by the reaction of isocyanate and polyether polyol. This foaming process is called all-water polyurethane foaming. According to the different raw materials used and the change of the formula, it can be made into Polyurethane sponges of different densities and pore sizes. Due to the different application fields and the required pore sizes, polyurethane soft fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/08B01D71/38B01D17/022
CPCB01D17/085B01D67/0011B01D69/08B01D71/38B01D2325/38
Inventor 肖长发吴艳杰黄庆林刘海亮
Owner TIANJIN POLYTECHNIC UNIV