Is polyacrylamide a surfactant?
Some customers ask whether polyacrylamide is a surfactant, the answer is undeniable. First of all, the concept of surfactant is: surfactant, also known as surfactant refers to the addition of a small amount of substances that can make its solution system interface state of the obvious changes, divided into anionic surfactant, cationic surfactant, nonionic surfactant. Polyacrylamide is a substance that can change the solution system significantly by adding a small amount, and it is also divided into cationic polyacrylamide, anionic polyacrylamide and nonionic polyacrylamide.
Cationic surfactants can be used as fabric softeners, printing aids for paints and inks, antistatic agents, fungicides, asphalt emulsifiers, hair conditioners, and baking creams. Cationic polyacrylamide has the functions of turbidity removal, decolorization, adsorption, adhesion, etc. It is suitable for the wastewater treatment of high organic colloid content in dyeing, papermaking, food, construction, metallurgy, ore-dressing, coal powder, oil field, aquatic processing and fermentation, etc. It is especially suitable for the dewatering treatment of municipal wastewater, municipal sludge, papermaking sludge and other industrial sludge.
Anionic surfactants have good decontamination, foaming, dispersion, emulsification, wetting and other characteristics. It is widely used as detergent, foaming agent, wetting agent, emulsifier and dispersant. Anionic polyacrylamide is mainly used for flocculation and sedimentation of various industrial wastewater, precipitation and clarification treatment, such as iron and steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater and other wastewater treatment, sludge dewatering and so on. It can also be used for drinking water clarification and purification treatment. Polyacrylamide with large molecular weight can be used as thickener, such as fragrance industry, detergent.
Cationic surfactant can not be used together with anionic surfactant or it will precipitate and lose its effectiveness. However, cationic surfactants can be used with nonionic surfactants.
Surfactant concept and common raw materials
Commonly used surfactant raw materials
Cationic surfactant: water solubility, more stable in acidic and alkaline solution with good surface activity and bactericidal effect.
Amphoteric surfactants: anionic in alkaline solution, strong decontamination; cationic in acidic solution, strong sterilization. Betaine-type amphoteric surfactants are suitable for any pH solution and have no precipitation at isoelectric point.
Nonionic surfactant: low toxicity, non-dissociative, not affected by pH; can be paired with most drugs. Polyoxyethylene fatty acid esters (sellze class, Myrij): strong water solubility, emulsification ability, as solubilizer and O/W emulsifier, commonly used polyoxyl 40 stearate (polyoxyethylene 40 stearate).
Emolphe (emlphor): soluble in water and alcohol and a variety of organic solvents, HLB 12 ~ 18, with strong hydrophilicity, emulsification ability, as a solubilizer and O / W-type emulsifier.
Cetomacrogol: O/W type emulsifier or volatile oil solubilizer.
Spans (Spans series): divided into
HLB1.8~3.8, because of its strong lipophilicity, it is generally used as emulsifier for water/oil emulsion. It can be used in applications, ointments, and as auxiliary emulsifiers in emulsions.
Tweens series: Its hydrophilicity is greatly increased, and it is a water-soluble surfactant used as solubilizer, emulsifier, dispersant and wetting agent.
It is the stone of the mountain: the United States developed a variety of single vehicle cleaner and vehicle polish, the formula contains EDTA, potassium fluorinated alkyl hydroxylate and other components.
Japan’s descaling detergent with oxalic acid and sodium alkylbenzene sulfonate as the main ingredient, varnish containing oleic acid, Brazilian carnauba wax and kerosene and other components.
The one-step cleaning and polishing technology commonly used abroad mainly uses diatomaceous earth, amorphous SiO2, silicate lu and other crystalline ionic materials as abrasives.
The United States in the 1980s developed anhydrous microparticles moderately abrasive transparent cleaning and polishing agent, the formula is mainly SiO2 plus polysiloxane, microcrystalline paraffin, cyclic dimethyl low molecular silicone ether, aliphatic solvent cleaner as raw materials, after a simple preparation of transparent cleaning and polishing agent. Microparticle pyrolysis amorphous hydrophilic SiO2 colloid as a moderate abrasive, thickening agent, and auxiliary cleaning agent, two hydroxypolysiloxane as a film-forming agent, microcrystalline paraffin wax as a film plasticizer, cyclic dimethyl low molecular silicone ether as a brightening agent, its production process is relatively simple.
Japan in the 1990s developed in the 20th century to solid waxes, imidazolines, amides and other active ingredients of the machine cleaning and polishing agent, can make the gloss level increased by 9.6%, while also constantly improving the surfactant to improve product performance to alkyl dimethyl aniline salts and methyl sulfate, triphenylammonium salts for ionic surface activity.
