Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 67,
  • Issue 2,
  • pp. 163-170
  • (2013)

Multiple-Perturbation Two-Dimensional Near-Infrared Correlation Study of Time-Dependent Water Absorption Behavior of Cellulose Affected by Pressure

Not Accessible

Your library or personal account may give you access

Abstract

Transient water absorption by cellulosic samples manufactured under varying pressure was monitored by near-infrared spectroscopy to explore the absorption behavior affected by the pressure. A substantial level of variation of the spectral features was induced by the water absorption and changes in the pressure. The detail of the spectral changes was analyzed with a multiple-perturbation, two-dimensional (2D) correlation method to determine the underlying mechanism. The 2D correlation spectra indicated that the compression of the cellulose increased the packing density of the samples, preventing the penetration of water. In addition, the compression substantially disintegrated its crystalline structure and eventually resulted in the development of inter- and intrachain hydrogen-bonded structures arising from an interaction between the water and cellulose. Consequently, the cellulose samples essentially underwent an evolutionary change in the polymer structure as well as in the packing density during the compression. This structural change, in turn, led to the seemingly complicated absorption trends, depending on the pressure.

PDF Article
More Like This
The Pressure Dependence of the Absorption by Entire Bands of Water Vapor in the Near Infrared*

John N. Howard and Robert M. Chapman
J. Opt. Soc. Am. 42(6) 423-426 (1952)

Absorption and attenuation of visible and near-infrared light in water: dependence on temperature and salinity

W. Scott Pegau, Deric Gray, and J. Ronald V. Zaneveld
Appl. Opt. 36(24) 6035-6046 (1997)

Further Studies of Pressure-Modulated Infrared Absorption

Richard R. Patty and Dudley Williams
J. Opt. Soc. Am. 51(12) 1351-1356 (1961)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved