The Preparation And Application Of Nano-Titanium Dioxide With Surface Functionalization

This paper provides a new method to prepare rutile titanium dioxide and titanium dioxide package nuclear complex. We choose inorganic mineral powders for nuclear matrix, at the same time, we choose rutile titanium dioxide for coat material, the titanium dioxide and coated matrix can react in the liquid phase system, in this way we can get composite-type titanium dioxide, which have high performance. This method is simple, low cost, and suitable for industrial production. If composite-type titanium dioxide is added to the plastics matrix, the same technical performance can be obtained as the use of pure titanium dioxide, and the cost of plastic product is significantly reduced.Synthetic rutile type titanium dioxide is an important process for preparation of high-quality composite-type titanium dioxide. In this paper, we can directly synthesize the rutile titanium dioxide at room temperature and liquid-phase system. This method has many advantages, such as unnecessary to introduce any nucleating agent and heat treatment process at high-temperature. The process is simple and low cost. Reaction process consists of two parts: the precipitation process and the process of rubber solvent. After sol-precipitation reaction, the sediment can be directly transformed into rutile titanium dioxide, without passing through the anatase phase process. At suitable reaction conditions, that is, n(NH3?H2O): n(Ti4+)= 4:1; n(H+): n(Ti4+)= 2:1; peptizate at 70oC for 4h, we can synthesize the rutile titanium dioxide, whose diameter is between at 90~150 nm. Particle size distribution is uniform and crystal morphology is integrity.With kaolin powders as a fundamental material and rutile titanium dioxide as a film-forming material, kaolin/rutile titanium dioxide composite particles are prepared. The effects of the kinds of starting material and the weight ratios of different components on the performance of products are discussed. The results show that the whiteness is 93.6%, covering property is 53.1 g/m2, oil absorption ratio is 35.43g/100g, and z-average diameter is 1.49μm. This product may be substituted for titanium dioxide and application in many areas.We test the performance to plastics applications between the sample R403 prepared and several similar products manufactured in domestic and abroad. The results show that R403 can be uniformly dispersed in the PVC, and there is no significant particle agglomeration. Rheological properties can meet the process requirements, and whiteness, gloss and durability are also able to meet the use requirements. In short, the application performance of home-made composite titanium dioxide (R403) is better than the similar domestic products, and close to high-quality foreign titanium dioxide.