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你能想象木頭比玻璃更适合做窗户的材料吗？美国科学家最新研发的透明木材不但透明度可以媲美玻璃，而且比玻璃锁热能力更强、更环保、更耐用、更安全，也更轻。
Scientists have designed transparent wood that could replace conventional glass in windows. The innovation was developed using wood from the balsa（轻木） tree， which is native to South and Central America， and claims to be five times more thermally efficient than glass.
The team treated balsa wood in an oxidizing bath that bleaches it off nearly all visibility and then penetrated it with a synthetic polymer called polyvinyl alcohol （PVA）—creating a product that is virtually transparent.
Unlike traditional glass， the transparent wood can withstand much stronger impacts and will bend when damaged， instead of shattering.
The transparent wood was created by teams at the University of Maryland and University of Colorado， which set out to find a greener alternative to conventional glass—a product that creates 25，000 tons emissions each year.
Along with contributing to greenhouse gases， glass contributes to a loss of energy.
“Residential building windows in particular account for 10%?20% of the heat loss due to their poor thermal management capability，” the team wrote in the study.
“Exploring energy efficient window materials is thus highly desirable to address heating costs， energy shortages， and the global impact of climate change associated with increased carbon emissions.”
The team notes that the bonding between PVA and cellulose in the wood， creates a tightly packed structure that allows for more thermal protection and makes it more durable and lighter than glass.
“Switching to transparent wood could prove to be cost?efficient as well，” researchers shared in a statement.
“It is approximately five times more thermally efficient than glass， cutting energy costs.”
“It is made from a sustainable and renewable resource with low carbon emissions. Its also compatible with existing industrial processing equipment， making the transition to manufacturing an easy prospect.”
Reading
Scientists have designed transparent wood that could replace conventional glass in windows. The innovation was developed using wood from the balsa（轻木） tree， which is native to South and Central America， and claims to be five times more thermally efficient than glass.
The team treated balsa wood in an oxidizing bath that bleaches it off nearly all visibility and then penetrated it with a synthetic polymer called polyvinyl alcohol （PVA）—creating a product that is virtually transparent.
Unlike traditional glass， the transparent wood can withstand much stronger impacts and will bend when damaged， instead of shattering.
The transparent wood was created by teams at the University of Maryland and University of Colorado， which set out to find a greener alternative to conventional glass—a product that creates 25，000 tons emissions each year.
Along with contributing to greenhouse gases， glass contributes to a loss of energy.
“Residential building windows in particular account for 10%?20% of the heat loss due to their poor thermal management capability，” the team wrote in the study.
“Exploring energy efficient window materials is thus highly desirable to address heating costs， energy shortages， and the global impact of climate change associated with increased carbon emissions.”
The team notes that the bonding between PVA and cellulose in the wood， creates a tightly packed structure that allows for more thermal protection and makes it more durable and lighter than glass.
“Switching to transparent wood could prove to be cost?efficient as well，” researchers shared in a statement.
“It is approximately five times more thermally efficient than glass， cutting energy costs.”
“It is made from a sustainable and renewable resource with low carbon emissions. Its also compatible with existing industrial processing equipment， making the transition to manufacturing an easy prospect.”
Reading