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1 Acta Geophysica

1 2023

1 Jiang H. l.

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Molecular scale of network structure and water absorption of soil moisture gel

100%

Jiang H. l.

2023

tom Vol. 71, no. 3

1377--1390

At present, the deterioration of the environment is aggravating. The study of non-pollution soil moisture materials can improve the environment to a certain extent. In this paper, the network structure and water absorption molecular scale of hydrogels are studied by means of electron microscope. In this paper, the soil moisture hydrogel was taken as the research object. Firstly, NaOH and acrylic acid were used as the main raw material to dissolve it into ethylene glycol. Then, the pH value was adjusted by different acids. After adjustment, the pH value was 7 after dialysis. Finally, acrylic acid nanoparticles hydrogel was obtained after ultrasonic treatment. Then, the network structure and molecular scale were observed by Internet of things microscope. The aged gum 8 h was injected into the hydrogel at a rate of 0.05 mL/min. When the front edge of the gel reaches the middle of the model, the formation water is injected at a speed of 0.1 mL/min, and the microscopic gel displacement mechanism of the hydrogel is analyzed by means of the Internet of things image acquisition. The results showed that nanoparticle hydrogel showed natural expansion under the electron microscope of the Internet of things. However, in dry state, the size of hydrogel is too small and the specific surface area is large. In the scanning electron microscope of the Internet of things, most hydrogels are agglomerated to form hydrogel clusters. The size of hydrogel in ethanol is the largest, and the particle size in simulated formation water is the smallest. The particle size is distributed between 150 and 450 nm. The rate of polymerization and the rate of precipitation of prepolymer are greater than that of the dispersant PVP on the surface of polymer particles. The hydrogel is cationic polymer, soluble in salt solution, but because of mutual exclusion between ions, the molecular chain cannot be completely extended; the particle size is smaller and the minimum 145 nm. It is suitable for deep migration and profile control in low-permeability rubber field. Therefore, in practice, hydrogels and their derivatives are ideal carbon-based resources.