On the absorption kinetics of superabsorbent polymers

Luis Pedro Esteves

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

932 Downloads (Pure)

Abstract

Superabsorbent polymers are hydrogels capable of absorbing considerable amounts of water without dissolving, and may have wide application in building materials. This material was initially used in cement-based materials with the purpose of internal curing, which is related with the balance of internal relative humidity during cement hydration. The mechanisms involved in the kinetic change between the hydrogel and water or pore fluid within the cement-based system are not fully understood. This work deals with the absorption kinetics of superabsorbent polymer in synthetic pore fluid medium. The physical state of particles selected from a superabsorbent polymer sample with particle size distribution comprehended between 50 to 500 micrometers was examined by means of optical microscopy and subsequent image analysis. This method showed to be an accurate technique for quantifying the absorption of water or fluid into the cross-linked structure of superabsorbent polymers. It is concluded that the size of the polymers particles have a significant effect on the absorption kinetics of poliacrylate-based polymers. The mechanisms which may affect the kinetic change are discussed and a model based on the well known Fick’s law is proposed.
Original languageEnglish
Title of host publication International RILEM Conference on Use of Superabsorbent Polymers and Other New Additives in Concrete
Number of pages8
PublisherRILEM publications SARL
Publication date2010
Pages77-84
ISBN (Print)978-2-35158-104-9
Publication statusPublished - 2010
Externally publishedYes
EventInternational RILEM Conference on Use of Superabsorbent Polymers and Other New Additives in Concrete - Lyngby, Denmark
Duration: 15 Aug 201018 Aug 2010

Conference

ConferenceInternational RILEM Conference on Use of Superabsorbent Polymers and Other New Additives in Concrete
CountryDenmark
CityLyngby
Period15/08/201018/08/2010

Fingerprint Dive into the research topics of 'On the absorption kinetics of superabsorbent polymers'. Together they form a unique fingerprint.

Cite this