1、Surface modification of TiO2 nanoparticles with silane coupling agents
In this study, two types of silane coupling agent 3-aminopropyltrimethoxysilane (APTMS) and 3-Isocyanatopropyltrimethoxysilane (IPTMS) were applied as a particle surface modifier for grafting functional groups onto TiO 2 nanoparticles surface thereby improving the affinity of nanoparticles to fabrics.
2、Silane modification of TiO2 nanoparticles and usage in acrylic film for
To fabricate a photocatalytic acrylic paint, TiO2 nanoparticles were surface modified by a bi-functional amino silane (i.e. bis-3- (aminopropyltriethoxysilane)) at different concentrations...
3、Dispersibility and Hydrophobicity Analysis of Titanium Dioxide
The effect of grafted modification with silane coupling agent on dispersibility and lipophilicity of TiO 2 nanoparticles was investigated. The factors of the modification were discussed, such as the amount of silane coupling agent, pH value, and reaction time.
Modification of Titanium Dioxide Nanoparticles with 3‐(Trimethoxysilyl
In this work, nano-TiO 2 particles was modified successfully with 3- (trimethoxysilyl)propyl methacrylate silane coupling agent in the alcohol solvent using ammonia as a catalyst for silane hydrolysis reaction.
用硅烷偶联剂改性 SiO2 纳米颗粒修饰的 TiO2 纳米复合材料
In this study, SiO2 nanoparticle-decorated TiO2 (SiO2/TiO2) nanocomposites modified with silane coupling agents were obtained by a two-step method to improve the inkjet printing performance.
Influence of modification of titanium dioxide by silane coupling agents
In this paper, titanium dioxide modification with 3-aminopropyltriethoxysilane as a silicon source is presented. The TiO2/APTES photocatalysts were obtained utilizing a solvothermal method. Different concentrations of APTES dissolved in ethanol were used for materials preparation (10−3000 mM).
Surface Modification of TiO2 Nanoparticles by Grafting with Silane
One of the solutions to overcome this problem is to treat the nanoparticle surface by using silane coupling agent such as bis- (3-triethoxysilylpropyl) tetrasulfide (TESPT). This work prepared n-TiO 2 from commercial micron sized-TiO 2 by ultrasonication technique.
(PDF) Surface modification of TiO2 nanoparticles with silane coupling
In order to improve the durability of nanoparticles at a fabric surface, the surface of commercial TiO2 nanoparticles was modified by 3-aminopropyltrimethoxysilane (APTMS) and...
The Effect of the Surface Treatment on TiO2 Particles When Used as a
This article analyzes the effect of the type of surface modification (using silane coupling agents and dicarboxylic acids) on titanium dioxide particles used as fillers in polylactic acid composites, which were exposed to a photodegradative process.
Surface modification of TiO2 nanoparticles with silane
In order to improve the durability of nanoparticles at a fabric surface, the surface of commercial TiO2 nanoparticles was modified by 3-aminopropyltrimethoxysilane (APTMS) and 3-Isocyanatopropyltrimethoxysilane (IPTMS) by an aqueous process in this study.
Silane coupling agents, as an important class of chemical reagents, play a significant role in the field of materials science. Particularly in the fabrication of nanocomposites, silane coupling agents effectively enhance interfacial properties, mechanical strength, and durability. This article provides a detailed introduction to the preparation process and applications of silane coupling agent-modified titanium dioxide (TiO₂).
1. Introduction to Silane Coupling Agents
Silane coupling agents are compounds composed of silicon atoms and hydrocarbon groups connected via organic functional groups. They exhibit unique chemical properties, such as high reactivity, excellent surface modification capabilities, and stable chemical characteristics. These agents are widely used in coatings, inks, rubber, plastics, composites, and other fields.
2. Principle of Silane Coupling Agent-Modified TiO₂
Titanium dioxide (TiO₂) is an essential inorganic pigment valued for its high brightness and superior optical properties, making it widely employed in coatings, inks, plastics, and other industries. the presence of hydroxyl and carboxyl groups on the surface of TiO₂ reduces its compatibility with other materials, thereby limiting its performance. Surface modification of TiO₂ is critical to improving its practical applications.
3. Preparation Process of Silane Coupling Agent-Modified TiO₂
- Surface Treatment: First, TiO₂ undergoes surface treatment to remove hydroxyl and carboxyl groups. This can be achieved through acid washing, alkali washing, or thermal treatment.
- Coupling Reaction: The treated TiO₂ is then reacted with silane coupling agents under controlled temperature and conditions to ensure sufficient bonding between the silane molecules and surface active sites.
- Cleaning and Drying: After the reaction, unreacted silane coupling agents are removed by washing. The modified TiO₂ is subsequently dried to obtain the final product.
4. Applications of Silane Coupling Agent-Modified TiO₂
- Coatings: As a filler, silane-modified TiO₂ improves wear resistance, scratch resistance, and gloss. It also enhances leveling properties and workability.
- Inks: In the printing industry, it serves as a pigment to boost coverage, color stability, and water resistance.
- Plastics: Used as a reinforcing filler, it increases hardness, wear resistance, and impact resistance.
- Composites: In composite materials, it acts as a strengthening agent, improving mechanical properties, heat resistance, and corrosion resistance.
Silane coupling agent-modified TiO₂ is an effective surface modification method that significantly improves the performance of TiO₂. Through rational preparation processes, this modified material has broad applications in coatings, inks, plastics, and composites, contributing importantly to the advancement of materials science.
