Preparation method of hydrophobic association type cationic polyacrylamide

Abstract

The invention discloses a preparation method of hydrophobic association type cationic polyacrylamide. The preparation method specifically comprises the following steps of under the condition of existence of a nonionic surfactant, adding a certain ratio of acrylamide monomer, cation monomer, low molecular weight anionic polymer and deionized water into a reaction device, and completely and uniformly stirring, so as to form a micelle copolymerizing system; adding a small amount of solubilizer and photo-sensitive initiator into the micelle copolymerizing system, and uniformly stirring; after theoxygen in the device is completely exhausted, sealing the device, placing into an ultraviolet reaction device, and performing photo-initiating micelle copolymerizing and reaction, so as to obtain a hydrophobic association type cationic polyacrylamide gel with a block structure; finally, purifying the gel, refining, drying and granulating, so as to obtain a final product. The prepared hydrophobic association type cationic polyacrylamide has the advantages of hydrophobic association property, centralized distribution of cationic groups, strong electron neutralizing ability, high molecular weightand the like, has good flocculation property, and can be widely applied to multiple types of sewage treatment and sludge dewatering technology.

Description

technical field [0001] The invention belongs to the field of environmental wastewater treatment, and in particular relates to a method for preparing hydrophobic association cationic polyacrylamide. Background technique [0002] The flocculation process is widely used because of its simplicity and economy. The core of the flocculation process lies in the selection of flocculants. Cationic polyacrylamide (Cationicpolyacrylamide, abbreviated as CPAM) is a linear polymer with positively charged active groups randomly distributed on its molecular chain, which can be electrically neutralized and neutralized with negatively charged colloidal particles in wastewater. The adsorption bridging effect makes the colloidal particles in the system destabilized, aggregated, and settled to achieve the purpose of solid-liquid separation. Hydrophobic modification of CPAM can effectively improve its flocculation performance. Introducing a small amount of hydrophobic groups on the cationic po...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a hydrophobic association cationic polyacrylamide, so as to solve the problem that the cations in the existing cationic polyacrylamide are randomly distributed and cannot be combined with the treated objects. The hydrophobic component plays a role, and the flocculation efficiency and the range of treatment objects are greatly limited.