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Surface Forces Measurements of Spin-Coated Cellulose Thin films with Different Crystallinity

Notley, Shannon; Eriksson, Malin; Wagberg, Lars; Beck, Stephanie; Gray, Derek

Description

A systematic study of the surface forces between a cellulose sphere and cellulose thin films of varying crystallinity has been conducted as a function of ionic strength and pH. Semicrystalline cellulose II surfaces and amorphous cellulose films were prepared by spin-coating of the precursor cellulose solutions onto oxidized silicon wafers before regeneration in water. Crystalline cellulose I surfaces were prepared by spin-coating wafers with aqueous suspensions of sulfate-stabilized cellulose I...[Show more]

dc.contributor.authorNotley, Shannon
dc.contributor.authorEriksson, Malin
dc.contributor.authorWagberg, Lars
dc.contributor.authorBeck, Stephanie
dc.contributor.authorGray, Derek
dc.date.accessioned2015-12-13T23:03:42Z
dc.identifier.issn0743-7463
dc.identifier.urihttp://hdl.handle.net/1885/85049
dc.description.abstractA systematic study of the surface forces between a cellulose sphere and cellulose thin films of varying crystallinity has been conducted as a function of ionic strength and pH. Semicrystalline cellulose II surfaces and amorphous cellulose films were prepared by spin-coating of the precursor cellulose solutions onto oxidized silicon wafers before regeneration in water. Crystalline cellulose I surfaces were prepared by spin-coating wafers with aqueous suspensions of sulfate-stabilized cellulose I nanocrystals. These preparation methods produced thin, smooth films suitable for surface forces measurements. The interaction with the cellulose I was monotonically repulsive at pH 3.5, 5.8, and 8.5 and at 0.1, 1, and 10 mM ionic strengths. This was attributed to the presence of strongly ionizable sulfur-containing groups on the cellulose nanocrystal surfaces. The amorphous film typically showed a steric interaction up to 100 nm away from the interface that was independent of the solution conditions. A range of surface forces were successfully measured on the semicrystalline cellulose II films; attractive and repulsive regimes were observed, depending on pH and ionic strength, and were interpreted in terms of van der Waals and electrostatic interactions. Clearly, the forces acting near cellulose surfaces are very dependent on the way the cellulose surface has been prepared.
dc.publisherAmerican Chemical Society
dc.sourceLangmuir
dc.subjectKeywords: Cellulose surfaces; Crystallinity; Regeneration; Semicrystalline cellulose; Amorphous films; Electric fields; Ionic strength; Nanostructured materials; pH effects; Silicon wafers; Sulfate minerals; Surface properties; Suspensions (components); Van der Waa
dc.titleSurface Forces Measurements of Spin-Coated Cellulose Thin films with Different Crystallinity
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume22
dc.date.issued2006
local.identifier.absfor030603 - Colloid and Surface Chemistry
local.identifier.ariespublicationMigratedxPub13245
local.type.statusPublished Version
local.contributor.affiliationNotley, Shannon, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationEriksson, Malin, Carmeda AB
local.contributor.affiliationWagberg, Lars, Royal Institute of Technology
local.contributor.affiliationBeck, Stephanie, McGill University
local.contributor.affiliationGray, Derek, McGill University
local.description.embargo2037-12-31
local.bibliographicCitation.startpage3154
local.bibliographicCitation.lastpage3160
local.identifier.doi10.1021/la052886w
dc.date.updated2015-12-12T07:50:47Z
local.identifier.scopusID2-s2.0-33645546475
CollectionsANU Research Publications

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