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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Production of cellulose nanocrystals from raw wood via hydrothermal treatment

Lignin-containing cellulose nano-crystals
Lignin-containing cellulose nano-crystals
Snapshot: Hydrothermal treatment can be used for production of cellulose nanocrystals directly from green wood. Forest Service scientistsused Raman spectroscopy to better understand the molecular details of this process.

There is considerable interest in high-strength cellulose nanocrystals (CNCs) that can be used as a reinforcing phase in cellulose-plastic composites. Normally, these are produced by treatment of wood pulp, but when the treatment is carried out on wood, a very low yield of CNCs is obtained. Forest Service scientists used Raman spectroscopy to better understand the molecular details of this process. They found there is considerable disorder within the cellulose microfibrils in green wood. These disordered cellulose regions are permeable to acid and undergo acid hydrolysis, the chemical method that successfully isolates crystals from crystalline cellulose materials. The chemical and thermal treatment in kraft pulping makes cellulose microfibrils partly crystalline, reducing the disorder and forming chemically robust crystalline structures. Hydrothermal treatment of green wood accomplishes the same formation of crystalline structure and allows CNCs to be obtained without the need for pulping and bleaching.
Princpal Investigator(s):
 Agarwal, Umesh P.

Research Location:
  • USDA Forest Service, Forest Products Laboratory, Madison, WI

Fiscal Year: 2017
Highlight ID: 1284
Related Research Emphasis Areas: