Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Cellulose crystallinity of woods, wood pulps, and agricultural fibers by FT-Raman Spectroscopy

Source: In: Proceedings 16th international symposium on wood, fiber and pulping chemistry. 2011 June 8-10. Tianjin, China. Beijing, China: China Light Industry Press: 69-74. 2011

Author(s)Agarwal, Umesh P.; Reiner, Richard R.; Ralph, Sally A.

Publication Year: 2011  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4709-2A

Abstract: Recently, for estimating cellulose crystallinity, the authors had proposed univariate and multivariate FT-Raman methods. In the present investigation, the univariate method was applied to a number of additional biomaterials (softwoods, hardwoods, wood pulps, and agricultural fibers). The materials were studied in the native, partially-delignified, and alkaline hydrogen peroxide bleached states. The latter two states were examined to evaluate how Raman crystallinity measurement is influenced by the presence of lignin in the sample and by the existence of sample-fluorescence in the Raman spectrum. It was found that for most lignin containing materials the univariate Raman method was a suitable alternative to calculate cellulose crystallinity. Additionally, another univariate FT-Raman method based on Segal-WAXS (or 18-WAXS) was developed (18-univariate Raman) and compared to the one proposed previously (21-univariate Raman). Compared to 21-univariate Raman, the 18-univariate Raman method produced the crystallinities that were about 17% higher. Therefore, it is proposed that for estimating cellulose crystallinities in lignocellulosic materials 21-univariate Raman be used instead of 18- or Segal-WAXS method.

Keywords: Analytic chemistry, cellulose chemistry, wood chemistry, Fourier transform spectroscopy, Raman spectroscopy, spectrum analysis, regression analysis, correlation, multivariate analysis, crystallization, chemical composition, bleaching, hydrogen peroxide, lignin analysis, fluorescence, lignocellulose, x-rays, cellulose fibers, wood-pulp, lignin chemistry, crystallinity, univariate analysis, crystalline cellulose, WAXS method, delignification, wood fibers, FT-Raman

Publication Review Process: Non-Refereed (Other)

File size: 365 kb(s)

Date posted: 09/07/2011
RITS Product ID: 39852
Current FPL Scientist associated with this product
Agarwal, Umesh P.
Research Chemist
  

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »