The main application of polyacrylamide (homopolymerization, copolymerization)
Paper making field
Polyacrylamide is widely used in the field of papermaking as flow aid, filter aid, homogeneity agent to improve the quality of paper, slurry dehydration performance, fine fiber and filler retention, reduce the consumption of raw materials and environmental pollution as a dispersant can improve the uniformity of paper. Polyacrylamide in the paper industry is mainly used in two aspects, one is to improve the retention rate of filler, pigment and so on to reduce the loss of raw materials and environmental pollution; The second is to improve the strength of the paper. The addition of polyacrylamide in paper can improve the retention rate of fine fiber and packing particles on the net, accelerate the dehydration of paper, the formation of flocs can also make the water in the slurry easier to filter out, reduce the loss of fiber in white water, reduce environmental pollution, and help improve the efficiency of filtration and precipitation equipment.
The medicinal materials
Polyacrylamide gel can be used as non-thrombin progranulator, surgical, contact lens raw material, microcapsule outer coating material, and used to manufacture high quality hemostatic tether, women's sanitary napkin and children's diapers. Polyacrylamide with particle sizes ranging from hundreds of microns to tens of microns can be used as chromatographic fillers (e.g. gel chromatographic column fillers) to effectively separate spherical proteins such as cytochrome. It can further desalinate and concentrate protein. Through Mannich reaction, l-proline or L-hydroxyproline was introduced into polyacrylamide side chain via methylene bridge, and then coordinated with copper ions to obtain chiral ligand resin, which can effectively split a series of DL amino acids. The chiral amino acids of polyvinylamine resin degraded by Hofmann are then complexed with copper ions, which can be used as the stationary phase of ligand exchange chromatography for the resolution of a series of amino acids, especially aromatic amino acids. Due to the strong hydrophilicity of the skeleton, the resolution time is greatly shortened.
Application in oil recovery
Polyacrylamide is a kind of multifunctional oil field chemical treatment agent, widely used in oil drilling, cementing, completion, workover, fracturing, acidification, water injection, water plugging profile control, tertiary oil recovery operation process, especially in the drilling, water plugging profile control and tertiary oil recovery field. Polyacrylamide aqueous solution has high viscosity, good thickening, flocculation and rheological regulation, used as oil displacement agent and drilling mud regulator in petroleum exploitation. At present, polymer flooding and asp flooding technology are mainly promoted in China in order to improve oil recovery in the middle and late stage of oil exploitation. By injecting polyacrylamide aqueous solution, the oil-water velocity ratio was improved, and the crude oil content in the produced product was increased. The addition of polyacrylamide in tertiary oil recovery can increase oil displacement ability, avoid breaking down reservoir and improve oil recovery. China's petroleum industry is the largest user of polyacrylamide, the scientific and technological progress of polyacrylamide has promoted the development of China's petroleum industry, and the demand of the petroleum industry has accelerated the pace of scientific and technological innovation of polyacrylamide and the development of the industry.
Food industry, used for sugar cane sugar, sugar beet sugar production cane juice clarification and syrup phosphorus float extraction. Enzyme preparation fermented liquid flocculation clarifying industry, also used in feed protein recovery, stable quality, good performance, recovery of protein powder to chickens and raising the survival rate of weight gain, no adverse effects of egg production, synthetic resin coating, civil water plugging grouting materials, building materials industry, improve the quality of cement, construction adhesive, caulking repair and plugging agent, soil improvement, electroplating industry, printing and dyeing, etc.