A kind of ion exchange membrane and its preparation process
A technology of ion exchange membrane and anion, which is applied in the field of diaphragm processing, can solve the problems such as the efficiency needs to be improved, and achieve the effect of good demoulding efficiency, increase exchange capacity, and avoid yellowing
Active Publication Date: 2018-11-16
徐劲峰 +1
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Problems solved by technology
Membrane surface resistance, that is, the resistance per unit membrane area (Ω.cm) is generally less than or equal to 20Ω·cm 2 , therefore, using this kind of ion exchange membrane to produce ultrapure water, its efficiency can still be improved
Method used
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Embodiment 1
[0028] A kind of preparation technology of ion-exchange membrane, it comprises the following steps:
[0029] S1. Weigh 145kg of nano-zinc oxide modified high-density polyethylene, 46kg of polyisobutylene, 6.5kg of zirconium coupling agent, 4kg of bis(pentafluorophenyl) titanocene and 3.5kg of maleimide derivatives into the high-speed In a mixing mixer, fully and evenly mix at normal temperature, then automatically weigh 2,4-dinitrophenol sodium 5kg and anion / cation resin powder 560kg by computer and join in a high-speed mixing mixer and mix again; S2. The mixture in S1 is prefabricated into a sheet, and the polymer mesh is pasted on both sides of the sheet; S3, the sheet pasted with the polymer mesh in S2 is placed into a multi-layer electric heating template with a light source Heating and pressing molding in S3, the heating temperature is controlled at 180°C to 220°C, and the time is kept between 1.0h and 2.5h; S4. After the sheet is heated in S3, use circulating condensed w...
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Abstract
Disclosed is a preparation process for an ion exchange membrane. The preparation process comprises the following steps of S1, weighing nano zinc oxide modified high-density polyethylene, polyisobutene, a coupling agent, a visible light initiator and a cross-linking agent and then pouring the components into a high-speed mixing agitator to be uniformly mixed at a normal temperature, then adding negative ions / negative ion resin powder based on proportion; S2, pre-fabricating a sheet material from the mixture in the step S1, and enabling macromolecule material net cloth to be adhered to the two sides of the sheet material; S3, putting the sheet material with the macromolecule material net cloth into a multi-layered electric heating template, and heating, pressing and shaping the sheet material at a temperature of 180-220 DEG C for 1.0-2.5h; and S4, after the sheet material obtained in the step S3 is heated, cooling and sizing the sheet material, and finally taking the sheet material out of the die. By adoption of the preparation method, the efficient ion exchange membrane with the exchange capacity of about 4.6mol / kg and the membrane surface resistance of about 5.02<omega>.cm<2> can be obtained; and in addition, the ion exchange membrane is suitable for deep desalination of industrial pure water, so that the ion exchange membrane can be widely applied.
Description
technical field [0001] The invention relates to the field of membrane processing, in particular to an ion exchange membrane and a preparation process thereof. Background technique [0002] The ion exchange membrane is a polymer membrane containing ionic groups and has the ability to selectively permeate the ions in the solution. Generally, ion exchange membranes include the following indicators, such as water content, mechanical strength, and exchange capacity, among which exchange capacity is a key parameter of ion exchange membranes, and its unit is mol / kg. The standard value stipulated by domestic industry standards is >1.8mol / kg. The exchange capacity of ion exchange membranes currently on the market is only 2-3mol / kg. Membrane surface resistance, that is, the resistance per unit membrane area (Ω.cm) is generally less than or equal to 20Ω·cm 2 Therefore, the efficiency of using this kind of ion exchange membrane to produce ultrapure water can still be improved. C...
Claims
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IPC IPC(8): H01M8/1023H01M8/1081
CPCH01M8/1023H01M8/1081Y02E60/50
Inventor 吕大为
Owner 徐劲峰