After the scientist breaks a small glass tube in the water sample to be tested, the small glass tube rapidly absorbs water and then shows a color reaction. Then it is inserted into a small instrument, and the data extraction key is pressed to determine the concentration of the analyte in the water. The data is clearly displayed before the review experts. This is the scene at the appraisal meeting of the “ZW Multi-Parameter Field Tester and Water Quick Test Tube Method†held in Zhengzhou recently. Experts of the project appraisal expert group, including Wang Erkang, academician of the Chinese Academy of Sciences, and Wei Fusheng, academician of the Chinese Academy of Engineering, agreed that the project simplifies cumbersome laboratory tests and has developed a multidisciplinary technology such as highly integrated colorimetric analysis, modern photovoltaics, and information processing. The new water quality on-site rapid test method with independent intellectual property rights provides a field test instrument that is widely applicable, simpler, intelligent, miniaturized, and portable for the construction of China's environmental safety emergency monitoring system, breaking the foreign technology and products. Monopoly, reaching the international advanced level.
The project leader, Bai Li, a research fellow at the Henan Academy of Sciences, told reporters of the “China Science Journal†that the project has undergone more than 10 years of research, mainly consisting of self-priming water quality rapid test tubes (color rendering system) and "Intelligent full-color tester" (detection system) consists of two core technologies, forming a unique rapid on-site water quality testing method and product system. In particular, the color system composed of 57 test tubes and the test system of the test system can be used to quickly determine a test object within minutes.
It is reported that they have applied for more than 50 national invention patents, obtained 28 patents, possessed state-level new products and national torch plan project certification; and in 2011 they were included in the national environmental protection emergency monitoring technical standards.
Li Shuhua, general manager of the Henan Academy of Sciences Zhengzhou Water Testing Technology Co., Ltd., said that the product of this project has technical advantages such as simple operation, strong anti-interference, stable and reliable data, and low secondary pollution, making it difficult to verify the speed and reliability of on-site water quality testing. Balanced problems can be better resolved, greatly improving the rapid response capability and emergency management level under emergency conditions. In the 2008 Wenchuan Earthquake Relief and subsequent Beijing's fight against "A stream", Yushu earthquake relief, Shanghai World Expo security and other major events, the project products have played a prominent role.
It is reported that during the implementation period of the project, direct economic benefits have been generated by nearly 20 million yuan, and the indirect benefits of replacing imported products and reducing disaster losses have reached several hundred million yuan.
Titanium Dioxide(TIO2)
Titanium dioxide is an important inorganic chemical pigment, the main component is titanium dioxide. The production process of titanium dioxide has two process routes: sulfuric acid method and chloride method. It has important applications in coatings, inks, papermaking, plastics and rubber, chemical fiber, ceramics and other industries.
It has two types: rutile type (Rutile R type) and anatase type (Anatase A type). The rutile crystal structure is compact, relatively stable, and has low optical activity, so it has good weather resistance, and has high hiding power and decolorizing power.
Titanium dioxide is widely used in coatings, plastics, rubber, ink, paper, chemical fiber, ceramics, daily chemicals, medicine, food and other industries.
The coating industry is the largest user of titanium dioxide, especially Rutile Titanium Dioxide, most of which is consumed by the coating industry. The paint made of titanium dioxide has bright colors, high hiding power, strong tinting power, low dosage, and many varieties. It can protect the stability of the medium, and can enhance the mechanical strength and adhesion of the paint film to prevent cracks. Prevent the penetration of ultraviolet rays and moisture, and extend the life of the paint film.
The plastics industry is the second largest user. Adding titanium dioxide to plastics can improve the heat resistance, light resistance, and weather resistance of plastic products, improve the physical and chemical properties of plastic products, enhance the mechanical strength of the products, and extend the service life.
The paper industry is the third largest user of titanium dioxide. As a paper filler, it is mainly used in high-grade paper and thin paper. Adding titanium dioxide to the paper can make the paper have better whiteness, good gloss, high strength, thin and smooth, no penetration during printing, and light weight. Titanium dioxide for papermaking generally uses Anatase Titanium Dioxide without surface treatment, which can act as a fluorescent whitening agent and increase the whiteness of paper. However, laminated paper requires the use of surface-treated rutile titanium dioxide to meet the requirements of light resistance and heat resistance.
Titanium dioxide is also an indispensable white pigment in advanced inks. The ink containing titanium dioxide is durable and does not change color, has good surface wettability and is easy to disperse. The titanium dioxide used in the ink industry has rutile type and anatase type.
The textile and chemical fiber industry is another important application field of titanium dioxide. Titanium dioxide for chemical fiber is mainly used as a matting agent. Since the anatase type is softer than the gold red type, the anatase type is generally used. Titanium dioxide for chemical fiber generally does not require surface treatment, but in order to reduce the photochemical effect of titanium dioxide and prevent the fiber from degrading under the action of titanium dioxide photocatalysis, surface treatment is required for some special varieties.
The enamel industry is an important application field of titanium dioxide. The enamel grade titanium dioxide has high purity, good whiteness, fresh color, uniform particle size, strong refractive index and high color reducing power, and has strong turbidity and Opacity, make the coating thin, smooth and strong acid resistance after enamelling. It can be evenly mixed with other materials in the enamel manufacturing process, does not agglomerate, and is easy to melt.
The ceramic industry is also an important application field of titanium dioxide. Ceramic grade titanium dioxide has high purity, uniform particle size, high refractive index, excellent high temperature resistance, and does not change ash at 1200°C for 1 hour. High opacity, thin coating, light weight, widely used in ceramics, construction, decoration and other materials.
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