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Application Fields of Montmorillonite
2026-02-10
As an important layered silicate clay mineral, montmorillonite is widely used in various fields due to its unique structural properties (such as expansibility, adsorbability, cation exchange capacity, and thixotropy).
1. Industrial Field
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Drilling Fluid Material: This is one of its traditional largest applications. Montmorillonite (especially sodium-based bentonite) forms a high-viscosity colloidal suspension in water, possessing excellent functions such as cuttings carrying, drill bit cooling, wellbore lubrication, and wellbore stabilization.
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Foundry Sand Binder: In the metallurgical industry, montmorillonite is used as a binder for molding sand and core sand. It can effectively bond sand grains, endow the sand mold with sufficient strength and plasticity, and enable easy collapse after pouring.
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Iron Ore Pellet Binder: When making iron concentrate powder into granular pellets, montmorillonite is required as a binder to improve the green pellet strength and burst temperature, facilitating transportation and smelting.
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Engineering Waterproofing and Sealing Materials:
Geosynthetic Clay Liner (GCL): Sodium-based bentonite swells when in contact with water to form a dense gel layer, making it an excellent waterproof and anti-seepage material for landfills, artificial lakes, and underground projects.
Sealing Materials: Used for waterproof sealing of pipeline joints and cracks.
2. Environmental Protection Field
2.1 Adsorbent
Wastewater Treatment: Adsorbs heavy metal ions (such as lead, cadmium, copper), organic pollutants (dyes, oils), and radionuclides. Its layered structure and high specific surface area provide strong physicochemical adsorption capacity.
Waste Gas Treatment: Can be used to remove harmful gases such as sulfur dioxide and nitrogen oxides from flue gas.
2.2 Soil Remediation and Improvement
Contaminated Soil Immobilization: Fixes heavy metals in soil, reducing their bioavailability and mobility.
Anti-seepage Layer: Used at the bottom of contaminated sites to prevent pollutant infiltration.
3. Agriculture and Animal Husbandry Field
3.1 Animal Feed Additive (Core Application)
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Mycotoxin Adsorption: Has a strong adsorption effect on aflatoxins, zearalenone, etc., reducing animal diseases and improving feed safety.
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Antidiarrheal Agent: Adsorbs pathogens, viruses, and their toxins, repairs intestinal mucosa, and is used to treat diarrhea in livestock and poultry.
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Production Performance Improvement: Enhances feed conversion rate and promotes growth.
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Breeding Environment Improvement: Adsorbs harmful gases such as ammonia and hydrogen sulfide, reducing odor in pens.
3.2 Soil Amendment (Agriculture)
Water and Fertilizer Retention: Improves the water and fertilizer retention capacity of sandy soil.
Soil Structure Improvement: Loosens compacted soil.
Slow-Release Carrier: Serves as a carrier for pesticides and chemical fertilizers to control their release rate.
4. Pharmaceutical and Daily Chemical Field
4.1 Pharmaceuticals
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Over-the-Counter Antidiarrheals (e.g., Montmorillonite Powder): By adsorbing pathogens, toxins, and gases in the intestines and covering and protecting the intestinal mucosa, it is a safe and effective physical antidiarrheal.
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Topical Preparations: Used in prickly heat powder and ointment bases, utilizing its moisture absorption, lubrication, and covering properties.
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Pharmaceutical Excipients: Used as binders, disintegrants, or adsorbents in dosage forms such as tablets.
4.2 Daily Chemical Products
Personal Care: Used in facial masks, cleansing clays, and shampoos as adsorbents, thickeners, and suspending agents, helping to clean pores and regulate product rheology.
Cosmetics: Used as skin feel regulators, oil adsorbents (especially suitable for oily skin products), and pigment carriers.
5. New Materials and High-Tech Field
This is a research hotspot for high-value-added applications of montmorillonite.
5.1 Nanocomposites
Polymer/Montmorillonite Nanocomposites: Dispersing montmorillonite nanosheets into plastics (such as nylon, polyolefins), rubber, or resins can significantly improve the material's mechanical strength, heat resistance, barrier properties (gas, liquid), and flame retardancy. They are used in automotive parts, high-performance packaging materials, etc.
5.2 New Adsorption and Catalysis Materials
Organophilic Montmorillonite: Introducing organic cations through ion exchange changes its hydrophilicity to lipophilicity, enabling it to better adsorb organic pollutants or serve as a compatibilizer for polymer composites.
Catalyst Carrier: Its interlayer space can be used as a microreactor to support metal or metal oxide nanoparticles for catalytic reactions.
5.3 Functional Materials
Phase Change Energy Storage Material Carrier: Embedding phase change materials such as paraffin into montmorillonite interlayers to prepare shape-stable phase change energy storage materials for building temperature regulation.
Controlled Release Materials: Utilizing its adjustable interlayer properties to load drugs, pesticides, chemical fertilizers, etc., to achieve slow and controlled release.
6. Food Industry Field
6.1 Processing Aids and Clarifiers
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Clarification and Stabilization of Wine, Fruit Juice, and Beer: Adsorbs proteins, polyphenols, and other turbidity-causing substances, improving product clarity and stability.
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Degumming and Refining of Edible Oil: Assists in adsorbing pigments, gums, and trace metal ions.
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Sugar Juice Purification: Adsorbs impurities during sugar production.
6.2 Functional Food Ingredients
It can be used as a component of dietary supplements, but its direct addition to food is subject to strict regulatory restrictions. It is mainly used as a processing aid and removed from the final product.
Summary and Core Application Logic
| Application Field | Core Utilized Properties | Typical Uses |
| Industrial Field | Colloidality, Adhesiveness, Expansibility | Drilling fluid, foundry binding, waterproofing and anti-seepage |
| Environmental Protection Field | Strong Adsorbability, Cation Exchange Capacity | Wastewater and gas treatment, soil remediation |
| Agriculture and Animal Husbandry | Adsorbability (toxins, pathogens), Mucosa Coverage | Feed mycotoxin remover, animal antidiarrheal, soil amendment |
| Pharmaceutical and Daily Chemical | Adsorbability, Safety, Coverage, Rheology | Antidiarrheal, skincare additive |
| New Materials | Nanosheet Structure, Modifiability, High Specific Surface Area | Nanocomposites, advanced adsorption and catalytic materials |
| Food Industry | Adsorbability, Clarification Capacity | Wine/fruit juice clarification, edible oil refining |
Montmorillonite is gradually expanding from a traditional bulk industrial raw material to high-value-added fields such as environmental protection, health, and high-tech new materials, with broad application prospects. Different applications have specific requirements for the purity, ion type (sodium-based, calcium-based, etc.), particle size, activation, or modification of montmorillonite.