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Does anyone know the mechanism of ion exchange membrane
- the mechanism are as follows: Ion exchange resins are high molecular material with an ion exchange function. in the solution, the ion of itself will have an exchange with the ion which has the same symbol in the solution. According to the different nature of the exchange groups, the ion exchange resin can be divided into cation exchange resin and an anion exchange resin. Most of the cation exchange resin has a sulfonic acid group (-SO3H), carboxyl (-COOH) and phenol (-C6H4OH) and other acidic group, wherein the hydrogen ions in solution can have an exchange with a metal or other cation. For example, the polymers of styrene and divinylbenzene by sulfonation is giving strong acid cation exchange resin and the structure can be simply expressed as R-SO3H, wherein R represents a resin matrix, the exchange mechanism is 2R-SO3H + Ca2 + (R-SO3 ) 2Ca + 2H this is the mechanism of water softening. Anion exchange resin comprises quaternary amine [-N (CH3) 3OH], amino (-NH2 ) or imidogen (-NH2 ) and other alkaline group. They can generate OH- ions in the water, and have exchange interaction with a variety of anions, the exchange mechanism is R-N (CH3) 3OH + Cl- R-N (CH3) 3Cl + OH- due to the ion exchange is reversible, so the used ion exchange resin is suitable to wash with acid or base resin with a suitable ion exchange concentration, to restore the original state and repeated use, so the process is called regeneration. cation exchange resin can be washed with dilute hydrochloric acid, dilute sulfuric acid solution; the anion exchange resin can be treated with sodium hydroxide solution, etc., and then reproduced. ion exchange resins are widely used, and it is mainly for the isolation and refinement. For example, softening water system and producing deionized water, recycling metal in industrial wastewater, separating rare metals and precious metals separation and purification of antibiotics.s
What is the membrane waterproof
- Polymer waterproof coating generally refers to the single component waterproof coating, acrylic waterproof coating, single component polyurethane waterproof coating are polymer.s
Does geomembrane has the color of grey?
- The color of the geomembrane is mostly black, and also green, white, gray, black green and other colors. The main material of geomembrane is high density polyethylene, auxiliary materials are antioxidants, anti UV agent, carbon black, masterbatch and so on, color of the geomembrane depending on the colour of added masterbatch. There is also geomembrane without auxiliary material, and it is transparent.s
Build an acre of shallow water lotus root pool, how much money to invest? With the kind of impermeable membrane, anti-seepage membrane how much money a flat
- Construction of lotus root selection of geomembrane, geomembrane is a polymer chemical flexible material, the proportion of small, strong extension, adaptable deformation ability, corrosion resistance, low temperature, good frost resistance. I engaged in the production and sales of geotextile materials, geomembrane cost low cost, good anti-seepage effect.s
What is the difference between single-sided laminated film and double-sided laminated film of paper cups?
- Paper cups coated with single-sided laminated film are used to contain hot drinks while paper cups coated with double-sided laminated film contain cold drinks ( condensated water caused by the cold drinks added with ice cubes will soften the cup). Milky tea can be held in paper cups coated with single-sided laminated film. Paper cups can be divided into single-sided PE laminating paper cups and two sides PE coated paper cups. Paper that is made of single-sided PE laminating paper is single sided PE laminating paper cup (most market cups and advertising cups in China is single sided PE laminating paper cup). There is smooth PE laminating film on the side of the cup that contacts with water. Paper cups that are made of double-sided PE laminating paper are double-sided PE laminating paper cups. The double-sided PE laminating paper cup has PE laminating paper on its both sides.s
Geotextile and geomembrane is not the same product ah?
- No, geomembrane is based on the geotextile plus a layer of impermeable membranes
What is the role of the base film
- Wallpaper basement membrane wall is a protective agent, consumers can choose not to, but generally recommend the use of a base film, such as not using old wallpaper will fade. The use of the base film wallpaper life of up to 8--9 years. Wallpaper base film is also zero formaldehyde, but it is an acidic substance, the purpose is to neturalize the alkaline, so construction will be finished some time sour taste.s
What are the advantages of membrane switch series?
- Membrane switch has many advantages: It is resistant to water, dust, oil and harmful gas erosion, and is stable and reliable in properties. It has small volume, long service life, and convenient installation. Its panel can be washed without damage of characters on it. It also has rich color and elegant appearance. Your product will obtain more distinct features of the time by using the membrane switch. Main types of the membrane switch: With rigid or flexible printed circuit board as substrate, the membrane switch panel is made with plastic (polycarbonate, polyester, etc.) faceplate with colored decorative patterns printed on it. It is installed with keys with hand feeling or not. It is a kind of electronic component integrating switch function with decorative function, and also has a new human-machine interface. Its switching circuit and connection mode of the complete appliance can be finished by welding or plug-in.s
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