Application of sodium carboxymethyl cellulose in bentonite:
1. Improve mud performance:
Thickening effect: In bentonite mud, sodium carboxymethyl cellulose can increase the viscosity of the mud, so that it can better play the role of wall protection and sand carrying in engineering applications such as drilling and shield construction. For example, in the construction of underground continuous walls, adding an appropriate amount of sodium carboxymethyl cellulose can keep the bentonite mud at an appropriate viscosity, prevent mud loss, and ensure the stability of the trench wall.
Suspension stabilization effect: Make the bentonite particles evenly dispersed in the water, maintain a suspended state, prevent the bentonite particles from settling, and make the mud system more stable. This is very important in application scenarios such as long-distance pipeline transportation of mud and drilling mud, which can ensure the stability of the mud during transportation, and there will be no stratification, precipitation and other problems.
2. Enhance waterproof performance:
In bentonite waterproof membrane, sodium carboxymethyl cellulose can be used in combination with bentonite to improve the waterproof performance of the membrane. The hydrophilicity of sodium carboxymethyl cellulose can help bentonite absorb water and swell better, forming a denser waterproof barrier to prevent water penetration. At the same time, sodium carboxymethyl cellulose can also enhance the bonding strength between bentonite and other materials, and improve the integrity and durability of waterproof membranes.
3. Improve adsorption performance:
Sodium carboxymethyl cellulose can increase the specific surface area and porosity of bentonite, thereby enhancing the adsorption capacity of bentonite for pollutants. For example, in sewage treatment, sodium carboxymethyl cellulose and bentonite can be used together to effectively remove pollutants such as heavy metal ions and organic matter in water, and improve the effect of sewage treatment.
4. As a binder:
In the production process of bentonite products, sodium carboxymethyl cellulose can be used as a binder to bond bentonite particles together to improve the strength and formability of the product. For example, in the production of bentonite ceramic products, adding an appropriate amount of sodium carboxymethyl cellulose can make the ceramic body stronger and reduce problems such as cracking and deformation during drying and firing.
