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US researchers have developed polyurethane composite materials with coal

2016-12-20Visitors:110

US researchers have developed lightweight PU composites using obsolete coal ash.

North Carolina Agricultural Technology State University's composite materials center, said the material can be stored in the ground for decades without compromising the environment. Kunigal Shivakumar, director of the research center, said that if it is removed and re-ground into powder, can also be used for manufacturing.

He said: "coal ash is not waste, if handled properly, is a valuable resource."

The mixed material can be molded into an exterior trim, a cover and an interior mold. "If you want to store it for a long time, you can mold it into large lumps," he added.

Project assistant research professor Wade Brown holds some of the patented PU processing technology, he said: coal ash can be used as raw materials for new materials, but still mixed with polyurethane can remain chemically inert.

He added: "This is the role of urethane, and coal ash is just its form of existence."

The North Carolina government provided the university with a total of $ 400,000 in research funding for two years to study the "beneficial use" of coal ash. In 2014, a total of about 39,000 tons of coal ash was dumped into the Dan River near North Carolina.

Shivakumar said the key to this innovation is that no additional heat is needed in the production process and can be processed directly from any type of coal ash from a coal fired plant. Eliminating the heat process reduces production costs and improves the environment, "This is a clean technology," he said.

This material contains 75% of the coal ash, the content ratio may increase to 80%.

Shivakumar said the research team had placed the material in the test pot for weeks and found that it was neither dissolved in water nor absorbed in water.

The research team is working hard to use this material to develop products with commercial value.

According to the United States Coal Association under the coal combustion products production and utilization of the survey report revealed that in 2014 the United States produced a total of 130 million tons of coal ash.