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NOW TRANSPARENT WOOD TO BRIGHTEN HOMES



Scientists   have   developed  transparent  wood  that  could   be   used   in building  materials   and  would  help    home  and  construction  owners   save  money   on  artificial   lighting   costs.
The  material   could  also   find  application in  solar cell  windows .researchers  said .

The  theory   is  ,if  the  walls  themselves  were  transparent  ,this  would   reduce  the  need  for  artificial   lighting .
Researchers  from    KTH  Royal  Institute  of  Technology  in  Stockholm,removed  lignin   from Balsa  tree.
Lignin  is   a   structural   polymer  in  plants  that  blocks    80  to  90% of  light   from  passing  through .To  allow  light  to  pass  through  the  wood  more   directly ,researchers   incorporated  acrylic  ,often   known  as  Plexiglass..

The transparent wood was created by first stripping all the lignin - a natural wood fibre found in cell walls - from the material. That makes the wood "beautifully white", the researchers explain, but doesn't help to make it see-through, seeing as wood itself blocks light.
But by embedding the white wood with a transparent polymer known as prepolymerized methyl methacrylate (PMMA), the team was able to alter its refractive index in order to achieve light transmittance of up to 85 percent - while still retaining the familiar wood structure.
The  research  was  conducted  by   lead   researcher  Lars Berglund.






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