Organic Modification of Titanium Dioxide and Its Influence on the Properties of Engineering Plastics

What is Titanium Dioxide

Titanium dioxide is an important inorganic chemical pigment whose main component is titanium dioxide. The production process of titanium dioxide has two process routes: sulfuric acid method and chlorination method. It has important uses in coatings, inks, papermaking, plastic rubber, chemical fiber, ceramics and other industries.

The main influence on the performance of engineering plastics

Due to the defects of titanium dioxide itself and the strong polarity of the surface, titanium dioxide without surface treatment is easy to absorb water and agglomerate during production, storage and transportation, and easy agglomeration limits its application in organic polymers. Therefore, effective surface modification of titanium dioxide to improve its dispersibility in organic polymers and compatibility with application systems has become the key to the wide application of titanium dioxide. In order to improve the wetting, dispersion and rheological properties of titanium dioxide in various dispersion media, organic modification is usually required.

1. The use of polysiloxane A, polysiloxane B and polyol organic modifier to treat titanium dioxide has no obvious effect on the Lab value of the powder, and the oil absorption index of the product decreases;

2. Titanium dioxide treated with polysiloxane is hydrophobic, which enhances the compatibility with plastic resins;

3. Polyol modified titanium dioxide is hydrophilic and easy to absorb moisture, which affects the application performance of plastics;

4. In the ABS resin system, titanium dioxide treated with polysiloxane A is added, which has the least influence on the mechanical properties of plastic products, and the tensile properties and impact strength of the material are the best.

5. It is recommended that the titanium dioxide used in the field of engineering plastics be modified with polysiloxane modifiers, and organic modifiers containing different groups should be selected according to different application systems to improve the overall performance of the material.

Overview of titanium dioxide TiO2 powder

Titanium dioxide TiO2 powder, also known as titanium dioxide, is an important inorganic chemical pigment whose main component is titanium dioxide. The production process of titanium dioxide has two process routes: sulfuric acid method and chloride method. Widely used in coatings, inks, paper, plastic rubber, chemical fiber, ceramics and other industries.

Among the commonly used white pigments, titanium dioxide has the smallest relative density. Among the white pigments of the same quality, titanium dioxide has the largest specific surface area and the largest pigment volume. Titanium dioxide has very stable chemical properties and is an acidic amphoteric oxide. At room temperature, it hardly reacts with other elements and compounds. Ineffective for oxygen, ammonia, nitrogen, hydrogen sulfide, carbon dioxide, sulfur dioxide. Insoluble in water, fat, dilute acid and inorganic acid, alkali, only soluble in hydrofluoric acid. . But under the action of light, titanium dioxide can undergo continuous redox reactions and has photochemical activity. This photochemical activity is particularly evident under the action of UV-anatase titanium dioxide.

Titanium dioxide has two structures: rutile (rutile R type) and anatase (A type). Rutile crystal structure is dense, relatively stable, and has low optical activity, so it has good weather resistance, high hiding power and extinction. Titanium dioxide has semiconducting properties, its conductivity increases rapidly with temperature, and it is also very sensitive to oxygen deficiency. The dielectric constant and semiconducting properties of rutile titanium dioxide are very important to the electronics industry and can be used to produce electronic components such as ceramic capacitors.

On a Mos hardness scale of 10 points, rutile TiO2 is 6-6.5 and anatase TiO2 is 5.5-6.0. Therefore, in chemical fiber matting, in order to avoid the wear of the spinneret hole, anatase is used. Although titanium dioxide is hydrophilic, its hygroscopicity is not too strong, and the rutile type is smaller than the anatase type. The hygroscopicity of titanium dioxide has a certain relationship with its surface area, the specific surface area is large, and the hygroscopicity is high, but it is also related to surface treatment and performance.

Application of titanium dioxide TiO2 powder

The most important applications of titanium dioxide are paints, varnishes and papers, as well as plastics, which account for around 80% of world titanium dioxide consumption. Other pigment applications, such as printing inks, fibers, rubber, cosmetics and food, account for another 8%. The remainder is used in other applications such as industrially pure titanium, glass and glass ceramics, electrical ceramics, metallic copper, catalysts, electrical conductors and chemical intermediates.

1. Titanium dioxide has become the most widely used white pigment due to its brightness and high refractive index.

2. Powdered titanium dioxide is also an effective sunscreen. It is used as a pigment to provide whiteness and opacity in products such as paints, coatings, plastics, paper, inks, food, pharmaceuticals (such as tablets and pills), and most toothpastes. In painting, it is often abbreviated to "lively white," "perfect white," "whitest white," or other similar terms.

3. Titanium dioxide is used as a colorant in the rubber industry, and also has the functions of reinforcement, anti-aging and filling.

4. Add titanium dioxide to white and colored rubber products, in the sun, it is resistant to sunlight, no cracking, no discoloration, high stretching ratio, and acid and alkali resistance.

5. Titanium dioxide for rubber is mainly used in automobile tires, rubber shoes, rubber floors, gloves, sports equipment, etc., generally anatase type.

6. In the production of automobile tires, a certain amount of rutile titanium dioxide products are often added to enhance the ability of anti-ozone and anti-ultraviolet rays.

7. Titanium dioxide is also widely used in cosmetics. Since titanium dioxide is non-toxic and far superior to lead white, almost all powdered titanium dioxide can replace lead and zinc white.

8. For permanent white, just add 5%-8% titanium dioxide powder to make the fragrance smoother, with strong adhesion, absorption and covering power.

9. Titanium dioxide in gouache and cold cream reduces greasiness and clarity.

10. Titanium dioxide is also used in many other fragrances, sunscreens, soaps, white soaps and toothpastes.

11. When deposited as a thin film, the refractive index and color of titanium dioxide make it an excellent reflective optical coating for dielectric mirrors.

12. Certain grades of modified titanium-based pigments are used in foam coatings, plastics, topcoats and cosmetics - the particles of these artificial pigments have two or more layers of different oxides (usually titanium dioxide, iron oxide or oxides) . aluminium), which can produce sparkling, iridescent and/or pearlescent effects.

13. Titanium dioxide is used as pigment, sunscreen and thickener in cosmetics and skin care products, and in sunscreen and anti-ultraviolet pigments.

14. As a sunscreen, it uses ultra-fine TiO2, which is known for its combination with ultra-fine zinc oxide. It is considered an effective sunscreen that reduces the incidence of sunburn and minimizes the effects associated with long-term use. Early photoaging, photocarcinogenic and immunosuppressive sun exposure. extra semester. Sometimes these UV protectants are used in sunscreens with iron oxide pigments to enhance protection from visible light.

The price of titanium dioxide TiO2 powder

The price of titanium dioxide will change randomly with factors such as titanium dioxide production cost, transportation cost, international situation, exchange rate and market supply and demand. Tanki New Materials Co.,Ltd aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for titanium dioxide powder, please feel free to send for the latest titanium dioxide powder price.

Titanium oxide TiO2 powder suppliers

As a global supplier of titanium dioxide TiO2 powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced technology and engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics, structural devices, and provides OEM services.