Hydrophilic white carbon black and hydrophobic white carbon black: performance comparison and application differences
White carbon black can be divided into hydrophilic white carbon black and hydrophobic white carbon black based on its surface properties, and there are significant differences between the two in terms of performance and application.
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1、 Properties and Applications of Hydrophilic White Carbon Black
Performance characteristics:
The surface of hydrophilic white carbon black contains a large number of hydrophilic functional groups such as hydroxyl groups (- OH), which can form hydrogen bonds with water molecules and exhibit good hydrophilicity and dispersibility.
It has a large specific surface area and strong adsorption capacity, making it suitable for scenarios that require high dispersibility and adsorption performance.
Application areas:
Coatings and adhesives: Hydrophilic white carbon black can enhance the adhesion and rheological properties of coatings.
Rubber industry: used as a reinforcing agent for rubber products to improve wear resistance and tear resistance.
Food and Medicine: As a flow aid and adsorbent, it improves the rheological properties of products.
2、 Properties and Applications of Hydrophobic White Carbon Black
Performance characteristics:
Hydrophobic white carbon black has low moisture absorption and good hydrophobicity through surface modification treatment.
Its particle size is larger and the specific surface area is smaller, but it has higher reinforcement ability and wear resistance.
Application areas:
Plastics and composite materials: Hydrophobic white carbon black can improve the weather resistance and mechanical properties of materials.
Coatings and sealing materials: Hydrophobic white carbon black can improve the scratch resistance of coatings and the waterproof performance of sealing materials.
Rubber products: among rubber products, hydrophobic silica can provide better wear resistance and anti-aging performance.
3、 Comparison between hydrophilic and hydrophobic white carbon black
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特性
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亲水白炭黑
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疏水白炭黑
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表面性质
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亲水性，表面含有羟基等官能团
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疏水性，表面经过疏水改性
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分散性
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在水中分散性好
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在有机溶剂中分散性好
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应用领域
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涂料、橡胶、食品、医药
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塑料、橡胶、涂料、密封材料
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功能
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增强吸附性、流变性能
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提高耐磨性、耐候性、疏水性
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In summary, hydrophilic white carbon black and hydrophobic white carbon black each have their own advantages, and the selection should be balanced according to specific application needs.
