Modification of Ground Calcium Carbonate with Silane Coupling Agents

1、Surface Modification of CaCO3 by Ultrasound

Surface modification of CaCO 3 can improve its dispersion and stability in organic materials and further improve its potential value. In this study, CaCO 3 particles were modified with silane coupling agent (KH550) and titanate coupling agent (HY311) combined with ultrasonication.

Surface Modification of CaCO3 by Ultrasound

2、EFFECT OF SURFACE MODIFICATION OF CALCIUM CARBONATE NANOPARTICLES BY A

In this study, the surface modification of calcium carbonate (CaCO3) nanoparticles was performed by using a silane coupling agent methyltrimethoxysilane (MTMS) and effect of surface hydrophobicity on the stability of foam and emulsion was investigated.

3、Surface Modification of CaCO3 by Ultrasound

Surface modification of CaCO3 can improve its dispersion and stability in organic materials and further improve its potential value. In this study, CaCO3 particles were modified with...

Surface Modification of CaCO3 by Ultrasound

Effects of CaCO3 surface modification and water spraying on the

This study aims to look into the effects of high amounts of micro-sized calcium carbonate and silane coated calcium carbonate on the weathering of PBAT films, as well as the effects of photooxidative degradation and hydrolysis on the weathering performance of neat PBAT and composite films.

Surface Modification of CaCO<SUB>3</SUB> by Ultrasound

Surface Modification of CaCO3 by Ultrasound

Study of Surface Modification of Ultra

In this study, in order to compare surface activity of ultra-fine CaCO3 particles, KH-550, KH-570, SG-Si171 and NDZ-311 were used to modify ultra-fine CaCO3.

Effect of surface modification of CaCO3 nanoparticles by a silane

In this study, the surface modification of CaCO 3 nanoparticles was performed by using a silane coupling agent methyltrimethoxysilane (MTMS) and effect of surface hydrophobicity on the stability of foam and emulsion was investigated.

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To improve the nano-particle dispersion and interfacial compatibility of CaCO3 nanoparticles with styrene-butadiene rubber (SBR) latex, the surface of CaCO3 nanoparticles was modified with silane coupling agent.

Improving the aging resistance of PBAT composite films via Co

In this study, CaCO 3 was modified via monolayer treatment using either stearic acid (SA) or a silane coupling agent (KH560), as well as via co-modification with both agents. The modified CaCO 3 was subsequently melt-blended with PBAT and processed into composite films through blown-film extrusion.

In modern industry, silane coupling agents have emerged as critical surface-treatment materials. Their application in modifying ground calcium carbonate (GCC) has garnered increasing attention. Silane coupling agents significantly improve the surface properties of GCC, enhancing its performance in industries such as plastics, rubber, and coatings. This paper explores the fundamental principles, technical processes, and practical effects of silane-modified GCC, aiming to provide valuable insights for professionals in relevant fields.

I. Basic Concept of Silane Coupling Agents

Silane coupling agents are compounds formed through chemical reactions between organosiloxane groups and inorganic metal oxides or hydroxides. They exhibit excellent chemical stability, strong adhesive properties, and reversible cross-linking capabilities. In the modification of GCC, silane coupling agents serve two primary functions:

Enhancing Interparticle Bonding: Chemical bonds between silane molecules strengthen the cohesion of GCC particles.
Surface Protection: A protective film forms on the GCC surface, improving resistance to aging and moisture.

II. Fundamental Principles of Silane-Modified GCC

The modification process involves the following steps:

Pretreatment: Cleaning and drying GCC to remove surface impurities and moisture.
Surface Activation: Treating GCC with acid or alkali to enhance reactivity with silane coupling agents.
Silane Coating: Uniformly applying silane coupling agents onto GCC particle surfaces.
Curing Reaction: Cross-linking reactions between silane agents and GCC surfaces under controlled temperature and time, forming stable chemical bonds.
Post-Treatment: Drying and cooling the modified GCC to ensure stability.

III. Technical Process of Silane-Modified GCC

Key steps in the modification process include:

Agent Selection: Choosing silane coupling agents based on application requirements and performance targets.
Concentration Optimization: Experimentally determining optimal dosage and concentration for maximum efficacy.
Reaction Control: Managing temperature, time, and mixing speed to ensure full surface interaction.
Testing and Analysis: Evaluating modified GCC properties (e.g., particle size, specific surface area, oil absorption) and assessing modification outcomes.

IV. Practical Effects of Silane-Modified GCC

Significant improvements have been observed in diverse applications:

Composite Performance: Enhanced strength, toughness, and wear resistance, while maintaining processability.
Plastic Appearance: Improved gloss, hardness, and scratch resistance, boosting market competitiveness.
Rubber Longevity: Increased aging resistance and durability, extending product lifespan.
Coating Optimization: Better adhesion, coverage, and wear resistance, enhancing decorative and protective functions.

Silane-modified GCC is a highly effective surface-treatment method widely used across industries. By studying the interaction mechanisms between silane agents and GCC, modification processes can be further optimized to elevate performance. With advancements in new material technologies, the application prospects of silane-modified GCC will expand significantly.