According to reports, the main ingredient of plastic bottles is polyester. In the production of polyester, a catalyst is needed. In the past, ruthenium-based catalysts containing toxic heavy metals were mostly used, and especially after heating, toxins were more likely to be produced. Researchers later used non-toxic titanium catalysts. This catalyst has the advantages of high activity, low dosage, and the like, but has disadvantages such as poor dispersibility and low reaction speed. Drinking plastic bottles of hot water, it is easy to have residual substances into the body, harmful to the body ... This is everyone's inherent impression of plastic bottles. Nowadays, a new technology of South Polytechnic can take off the plastic bottle "toxic substance" hat. This new technology is called "production of nano-titanium dioxide at low temperature."

The new technology invented by South Institute of Technology Wang Xin, Liu Xiaoheng, Lu Lude, and Yang Xujie can extract non-toxic and efficient catalyst nano-titanium dioxide crystals. According to reports, titanium dioxide is a kind of titanium catalyst, ultra-fine nano titanium dioxide catalyst is extracted from the non-toxic polyethylene glycol system. Because the crystal is small, the surface area is large, the reaction activity is strong, and the catalytic effect is obvious. This solves the problems of low reaction speed of traditional titanium catalysts.

In addition, the original preparation of titanium dioxide is completed under high temperature conditions, high energy consumption, surfactant used in the preparation process can only be discharged into the environment as industrial wastewater, very environmentally friendly. The new technology can be prepared in a low-temperature environment, while reducing energy consumption. It can also recycle raw polyethylene glycol for reuse.

According to reports, after using this kind of ultra-fine catalyst, the bottle made of polyester has the characteristics of excellent brightness, high strength and good dimensional stability, which can increase the filling temperature of hot-filled beverages. Recently, the project has just received the “Thirteenth China Patent Excellence Award” jointly awarded by the State Intellectual Property Office and the World Intellectual Property Organization. It can be successfully applied to various fields such as catalysis, composite materials, and cosmetics, and has innovated production technologies and improvements. Product quality, improve the ecological environment.

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