Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 50,
  • Issue 11,
  • pp. 1402-1407
  • (1996)

Characterization of a Polypropylene/Super-Absorbent Web by NMR Diffusion Studies

Not Accessible

Your library or personal account may give you access

Abstract

Super-absorbent fiber has the property of absorbing moisture up to several thousand times its original weight, undergoing significant expansion, and eventually becoming a gel. The hydrophilic super-absorbent fiber is usually blended with hydrophobic polymer fiber to form a polymer web with the ability to attract fluid and also to hold it under pressure. Because of the confining influence of pore boundaries on molecular translation, restricted diffusion measurements on fluids in porous systems, such as the super-absorbent web, contain important information about the pore morphology. In this work, we studied the diffusion of water in a web of super-absorbent polyacrylate and polypropylene fiber. We observed restricted diffusion of the water by means of the pulsed-field-gradient spin-echo (PFGSE) NMR technique. Several mathematical models were used to interpret the data and yield estimates of the gross pore dimensions and the surface-to-volume ratio of the pores.

PDF Article
More Like This
Fabrication and characterization of a composite TiO2-polypropylene high-refractive-index solid immersion lens for super-resolution THz imaging

Quentin Chapdelaine, Kathirvel Nallappan, Yang Cao, Hichem Guerboukha, Nikita Chernomyrdin, Kirill Zaytsev, and Maksim Skorobogatiy
Opt. Mater. Express 12(8) 3015-3031 (2022)

Computationally-efficient spatiotemporal correlation analysis super-resolves anomalous diffusion

Shawn Yoshida, William Schmid, Nam Vo, William Calabrase, and Lydia Kisley
Opt. Express 29(5) 7616-7629 (2021)

Petrophysical applications of NMR imaging

William P. Rothwell and H. J. Vinegar
Appl. Opt. 24(23) 3969-3972 (1985)

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