Eco-friendly transparent poplar-based composites that are stable and flexible at high temperature

Farmed poplar could meet the human demand for transparent wood-based composites to replace glass, avoiding the consumption of natural forest resources. We removed the lignin of poplar using a potassium hydroxide (KOH) and deionized water solution, the waste black liquor could be converted into compo...

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Bibliographic Details
Published in:RSC advances 2019-07, Vol.9 (37), p.21566-21571
Main Authors: Zou, Weihua, Sun, Delin, Wang, Zhangheng, Li, Ruoyao, Yu, Wenxuan, Zhang, Pingfang
Format: Article
Language:English
Subjects:
Black liquor
Chemistry
Composite materials
Deionization
Haze
High temperature
Light diffraction
Lignin
Phosphoric acid
Polyurethane resins
Poplar
Potassium
Potassium hydroxides
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Summary:Farmed poplar could meet the human demand for transparent wood-based composites to replace glass, avoiding the consumption of natural forest resources. We removed the lignin of poplar using a potassium hydroxide (KOH) and deionized water solution, the waste black liquor could be converted into compound potassium fertilizer after being neutralized by phosphoric acid. Polyurethane (PU) was then added to the lignin-stripped poplar and hardened, the transparent poplar-based composite (TPC) has stable transparency at high temperatures, and flexibility - it elongates (about 15%) before breaking. These properties could provide more uses in hot environments requiring a flexible shape. The TPC PU provides transmittance of 85%, haze of 83%, and anisotropic light diffraction. Farmed poplar could meet the human demand for transparent wood-based composites to replace glass, avoiding the consumption of natural forest resources.
ISSN:2046-2069
2046-2069
DOI:10.1039/c9ra03550h