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Manufacturing method of rolled ion exchange homogeneous membrane

A technology of ion exchange and manufacturing method, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of local composition and structure errors of impregnated base membrane, difficult to control accurately, and unable to obtain uniform microstructure structure, etc., to achieve impregnation. Easy and stable, reasonable homogeneous film structure, stable physical and chemical properties

Active Publication Date: 2017-11-07
QUZHOU LANRAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the ion exchange membrane prepared by the above impregnation method, the base membrane (polyolefin component) material does not originally contain benzene rings, so the base membrane itself cannot introduce ion exchange functional groups (sulfonic acid groups or quaternary ammonium groups), in fact, it cannot Obtain a homogeneous structure on the microstructure
Moreover, if the impregnation process is not well controlled, the prepared ion exchange membrane does not have the structure and characteristics of a homogeneous membrane
At the same time, because of the incompatibility between polyolefin and styrene / divinylbenzene polymerized monomer phase, the impregnation process is greatly affected by external factors (impregnation method, time, temperature, monomer phase flow state, etc.), Difficult to precisely control
In addition, because the impregnation process cannot be carried out continuously and automatically in rolls, the above-mentioned "manual" impregnation method generally obtains a monolithic ion exchange membrane, and there will be large errors in the local composition and structure of the impregnated base membrane; the subsequent Sulfonation, chloromethylation / quaternization reactions are also not carried out in rolls
Therefore, it is impossible to obtain coiled ionic membrane products, it is difficult to realize large-scale high-efficiency industrial manufacturing, and the quality of membrane products is also unstable.

Method used

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  • Manufacturing method of rolled ion exchange homogeneous membrane
  • Manufacturing method of rolled ion exchange homogeneous membrane
  • Manufacturing method of rolled ion exchange homogeneous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the manufacture method of roll type cation exchange homogeneous membrane (standard positive membrane), concrete steps are as follows:

[0034] Step 1: Take poly(styrene-ethylene) alternating copolymer (PSE) dense particles (Ningbo Carl New Material Technology Co., Ltd., brand: K1123, linear polystyrene content 23%), and successively pass through twin-screw extrusion, flow Stretching, stretching, air cooling, winding and other processes to make linear polystyrene elastomer film rolls with a width of 0.8 meters and a thickness of 0.18 mm. Take a film roll with a length of 120 meters (net mass: 15,923 grams), first fix it on the left roller shaft above the impregnation tank with a clip, turn on the motor, and slowly finish winding; stop the motor and then manually unwind the roll, and bypass it in turn Left top roller (left pressure roller), groove bottom roller, right top roller (right pressure roller), right roller shaft, and are fixed on the right roller s...

Embodiment 2

[0039] Embodiment 2: the manufacture method of roll type anion exchange homogeneous membrane (diffusion dialysis negative membrane), concrete steps are as follows:

[0040] Step 1: Take fluffy granules of styrene-isoprene-styrene block copolymer (SIS) (Kraton Polymers Company of the United States, trade mark: D1124K, linear polystyrene content 30%), and extrude them successively through twin-screw Out, casting, stretching, air cooling, winding and other processes to make linear polystyrene elastomer film rolls with a width of 0.6 meters and a thickness of 0.08 mm. Take a film roll with a length of 100 meters (the net mass is 4,416 grams), first fix it on the left roller shaft above the impregnation tank with a clip, turn on the motor, and slowly finish winding; stop the motor and then unwind the roll manually, bypassing in turn Left top roller (left pressure roller), groove bottom roller, right top roller (right pressure roller), right roller shaft, and are fixed on the right ...

Embodiment 3

[0045] Embodiment 3: the manufacture method of roll type cation exchange homogeneous membrane (standard positive membrane), concrete steps are as follows:

[0046] Step 1: get styrene-ethylene / propylene-styrene block copolymer (SEPS) dense granules (U.S. Kraton polymer company, brand: G1730M, linear polystyrene content 20%) and styrene-ethylene / butylene Styrene-styrene block copolymer (SEBS) powder (Kraton Polymers Company of the United States, brand: G1641H, linear polystyrene content 33%), uniformly mixed according to the mass ratio of 5 / 1, and then extruded through twin-screws successively , casting, stretching, air cooling, winding and other sections to make linear polystyrene elastomer film rolls with a width of 0.6 meters and a thickness of 0.15 mm. Take a film roll with a length of 120 meters (net weight is 9,936 grams), first fix it on the left roller shaft above the impregnation tank with a clip, turn on the motor, and slowly finish the winding; stop the motor and the...

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Abstract

The invention discloses a manufacturing method of a rolled ion exchange homogeneous membrane. The manufacturing method comprises the following steps: (1) installing an elastomer film roll containing a linear polystyrene component onto a roller type soaking trough provided with a jacket water circulation temperature control system, balancing the unreeling / reeling speed, repeatedly reeling and unreeling the roll, and continuously impregnating the roll into a polymeric monomer phase composed of styrene, divinyl benzene, and an initiator; (2) taking out the impregnated roll, unreeling the roll, laminating a polyester protective film onto the roll, pressing, reeling, heating the roll and the polyester protective film in a water bath to trigger polymerization, and peeling off the polyester protective film to obtain a composite basic membrane containing crosslinked polystyrene; and (3) using a polypropylene partition net to loosen, partition and reel the composite basic membrane obtained in the step (2), placing the whole body into concentrated sulfuric acid to carry out sulfonation reactions, (or placing the whole body into chloromethyl ether to carry out chloromethylation reactions, and then placing the whole body into a trimethylamine solution to carry out quaternary amination reactions), washing the reaction product, peeling off the polypropylene partition net, and reeling the wet membrane individually to obtain the rolled ion exchange homogeneous membrane.

Description

technical field [0001] The invention belongs to the technical field of functional polymer thin film manufacture and membrane separation, and in particular relates to a large-scale industrial manufacturing method of roll-type anion / cation exchange homogeneous membranes based on continuous impregnation and roll-forming functional radicalization reactions. Background technique [0002] Ion-exchange membranes are immobilized with groups that can undergo ion exchange, such as cation-exchange membranes are immobilized with strong acidic sulfonic acid groups (exchangeable cations), and anion-exchange membranes are immobilized with strongly basic quaternary ammonium groups (exchangeable cations). exchange anions). Its unique ion exchange characteristics make ion exchange membranes play an important role in material separation, clean production, environmental protection, energy conversion, etc., and become an important part of the sustainable economic development strategy. According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D71/28B01D67/00B01D69/02B01D69/12C08J7/16C08L25/08C08L53/02
CPCB01D67/0002B01D69/02B01D69/125B01D71/28B01D71/48B01D2325/42C08J7/16C08J2325/06C08J2353/02
Inventor 雷引林李南文杨建锋李治辉陈文澜
Owner QUZHOU LANRAN NEW MATERIAL CO LTD
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