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Using nanotechnology to prevent chemical leaching of treated wood

Wood has for long been used as a building material owing to its once abundant nature and durability. Now, it is treated through a process that allows it to remain durable for a long period of time. The use of chemicals in wood through pressure treatment methods means that it can last longer as the chemicals deter insects and other organisms from making it their home, thereby prolonging the life of wood by a good 20 years. Pressure treated wood, however, doesn’t come without its share of problems. Over time, it can leach out the chemicals that can be harmful to life forms and the environment as a whole. In this regard, scientists from Michigan Technological University have come up with a system using nanotechnology to safely keep chemicals inside wood.

Keeping Wood Preservatives Where They Belong

The process uses nanoparticles to deliver preservatives to wood. According to the scientists, the experiment saw leaching being reduced by a good 90 percent. The nanoparticles are made up of gelatin or chito, which is a material found in shells of shrimp and shellfish. The little spheres are chemically modified to drive them to surround tebuconazole, a fungicide.

The good news is that while the nanoparticles prevent leaching to protect small insects and other organisms, the wood can be treated through normal pressure treatment methods to extend its life. The only difference is that the chemicals used don’t leach out. The resulting wood is as resistant to insects and rot as those treated using conventional processes.

The scientists are now testing wood found in the warm climes of Hawaii and will see if their technology can be successfully applied there as well. With the novel invention, lovers of wood products will soon be able to adorn their interiors with these natural materials without having to worry about breathing in toxic chemicals.

Via: MTU

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