Polyelectrolytes and Polycomplexes for Stabilizing Sandy GroundsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 22 декабря 2021 г.
Аннотация:Abstract—Interaction of the anionic copolymer of acrylic acid and acrylamide with a molar ratio of mono-mer units of 75 : 25 and poly(N,N′-diallyl-N,N′-dimethylammonium chloride) in aqueous solution is stud-ied. The interaction is accompanied by the formation of a polycomplex stabilized by multiple salt bondsbetween oppositely charged groups of both polyelectrolytes. A nonstoichiometric polycomplex with a ten-fold excess of anionic groups is present in solution in the form of particles with a diameter of about 300 nm;the particles retain their aggregate stability for 30 days. The application of aqueous solutions of individualpolymers and the nonstoichiometric polycomplex on the surface of sand with a particle size of 0.15 ±0.05 mm is associated with the formation of composite polymer-sand coatings. The highest mechanicalstrength is possessed by coatings with the participation of an anionic copolymer and a polycomplex. Forsand and polycomplex coatings, the weight loss during water treatment is 10%, which is lower than that inthe case of traditional polyacrylamide soil stabilizer. The polycomplex at a concentration of up to 0.33 wt% does not exhibit toxicity to microorganisms, thereby indicating that the use of a negatively charged poly-complex is promising for obtaining waterproof protective coatings on the surface of sandy soils.