Comparative SAXS study of heated and alkali-treated sisal fibers

• Published in: Journal of applied polymer science Vol. 125; no. 3; pp. 2356 - 2362
• Main Authors: Khan, Md. N., Bisoyi, D. K., Shukla, J.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.08.2012; Wiley; Wiley Subscription Services, Inc
• Subjects: Applied sciences; correlation functions; Electron density; Exact sciences and technology; Fibers; Fibers and threads; Forms of application and semi-finished materials; lamellar model; Materials science; Phase boundaries; Polymer industry, paints, wood; Polymers; Reproduction; SAXS; Sisal; sisal fiber; Slits; Technology of polymers; Three dimensional; transverse periodicity; Mercerization; Heat treatment; sisal fiber; transverse periodicity; Plant fiber; Crystallinity; Sisal; Experimental study; correlation functions; SAXS; Structure processing relationship; lamellar model; Chemical treatment; Natural fiber
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.36460

The present investigation deals with the fine structural characteristics of heated and alkali‐treated sisal fiber using small‐angle X‐ray scattering (SAXS) technique for nonideal two‐phase systems. The SAXS intensities of heated and alkali‐treated sisal fibers deviate from Porod's law, indicating that the samples belong to nonideal two‐phase systems characterized by continuous variation of electron density at the phase boundary. The macromolecular parameters such as the average periodicity transverse to layers, specific inner surface, volume fractions of void and matter phases, and so on of the samples were evaluated by using one‐ and three‐dimensional correlation functions, which reveal all the information concealed in the slit smeared SAXS patterns. As all the samples under our purview of study have two‐phase structure with diffuse phase boundaries, the average thickness of the transition region have been determined. This analysis throws some light on the structural changes that occurred in the dewaxed sisal fiber treated by NaOH solutions and subject to heat treatments. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012