Industrial waste gas "incarnate" high-end resin lens

Industrial waste gas, as an emissions in the process of industrialization, has always had a greater impact on the natural environment and human health.
Solving the problem of industrial waste gas emissions is a problem that humans have been studying and exploring for many years.

Recently, the problem of industrial waste gas has once again been solved by scientists.
Through a special copolymerization reaction, the exhaust gas carbon oxysulfide becomes a special solid material.
This transparent material can be used to synthesize raw materials for the production of resin spectacle lenses and optical fibers in the future.

This new technology was developed by the research group of Professor Zhang Xinghong, Department of Polymer Science, Zhejiang University, and the relevant research results were published in Nature Communications.

In the eyes of chemists, the recycling and utilization of carbon oxysulfide has great social and economic significance for a country like my country that consumes coal and oil.

The abominable carbonoxysulfideabhorrent carbon oxysulfidecarbon oxysulfide
is a forbidden exhaust gas produced in the process of coal burning, oil refining and chemical industry.
The reason why it is said to be exhaust gas, because it has always been harmful to the natural environment and health.

Carbon oxysulfide will seriously corrode production equipment, and when exhaust gas escapes into the air, it will also produce sulfur dioxide and cause acid rain.
Acid rain will cause the acidification of the land, affect the growth and development of plants, corrode urban buildings, and cause human diseases to increase.

In addition, carbon oxysulfide can also be photooxidized to destroy the ozone layer.

In addition to being produced in industry, carbon oxysulfide is often found in and outside the home.
The smell of backwater in the water channel and the smell of broken food in the refrigerator is the smell of carbon oxysulfide.

For a long time, human beings have been committed to the disposal of industrial waste gas emissions such as carbon oxysulfide.
The common way is to reduce emissions.
This approach has brought about a reduction in production capacity or a huge increase in waste gas treatment investment, such as desulfurization treatment.

Desulfurization treatment is currently one of the more mainstream practices, but after desulfurization, how to deal with these removed sulfur-containing substances is still a difficult problem facing mankind.

The magic of　　turning waste into treasure　　The magic of turning waste into treasure
　　Zhang Xinghong, who has been studying polymer materials for more than ten years, began to think and research.
Their research goal is to find the most effective specific catalytic system to fix the gaseous carbon oxysulfide.

　　After 10 years of research, Zhang Xinghong successfully recycled carbon oxysulfide into polymer materials.

　　In the laboratory of Zhang Xinghong’s research group, the reporter saw that by putting carbon oxysulfide and epoxy compound-a common and cheap chemical raw material-together with the catalyst in an autoclave, the two can be polymerized into a kind of Poisonous, colorless and transparent new substance.

　　"The sulfur-containing polymer material obtained in this way is half of the weight derived from carbon oxysulfide, and the recycling efficiency is high.
" Zhang Xinghong introduced that the material obtained by the polymerization reaction has high refractive index and Abbe number, which is an ideal optical resin.

　　Refractive index and Abbe number are two indicators that we usually encounter in optical shops.
The same degree, the lens with high refractive index is light and thin, and will not become "beer bottle bottom".
A lens with a high Abbe number can more accurately reflect the colors of the world.

　　Zhang Xinghong said that the optical resin synthesized from sulfur-containing waste gas has good processing properties, and can easily manufacture lenses, optical fibers, etc.
, which is very useful.

　　Metal-free catalysts have a high degree of hard work,　　metal-free catalysts have a high degree of hard work
　　, 　　 The core reason why carbon oxysulfide can be turned into a material for resin glasses is the catalyst.

　　Finding the right catalyst is a huge challenge in this type of research, and Zhang Xinghong was lucky to find this catalyst successfully.

　　"At room temperature, carbon oxysulfide cannot self-polymerize.
We have realized the copolymerization of carbon oxysulfide and epoxy compound in the early stage, and effectively transform it into a material.
But we use a metal catalyst, and people’s biggest appeal is the material.
It must not contain heavy metals.
" Zhang Xinghong said.

　　Zhang Xinghong’s team further carried out research on non-metallic catalysts, combining two kinds of nitrogen-containing organic small molecules to form a simple, inexpensive and effective catalytic system.

　　Zinc carbonic anhydrase was widely present when there was life in the early days of the earth.
It plays an important role in regulating the acidity and alkalinity of the body and maintaining life.
In nature, zinc carbonate anhydrase can catch carbon oxysulfide and convert it into hydrogen sulfide.

　　Zhang Xinghong’s team has thoroughly studied the mechanism of why zinc carbonate anhydrase can efficiently activate carbon oxysulfide, borrowing its function and structure, and finally found a non-metallic catalyst that successfully converts carbon oxysulfide into useful materials.

　　This new catalytic system is simple, cheap, and effective.
In particular, the catalyst does not contain metal, so that the sulfur-containing polymer obtained exhibits the original colorless and transparent quality.

　　“Currently, the preparation of sulfur-containing polymers uses highly toxic phosgene and mercaptans, which are difficult to store and transport, as raw materials.
Our new method has brought breakthroughs in exploring non-phosgene routes.
” Zhang Xinghong said, the industry of the research results Favorable prospects for chemistry.

Source: Science and Technology Daily