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Controlling water permeability of composite films of polylactide acid, cellulose, and xyloglucan

Sofie Gårdebjer (Institutionen för kemi- och bioteknik, Farmaceutisk teknologi ; SuMo Biomaterials) ; Anette Larsson (Institutionen för kemi- och bioteknik, Farmaceutisk teknologi ; SuMo Biomaterials) ; Caroline Löfgren ; Anna Ström (Institutionen för kemi- och bioteknik, Farmaceutisk teknologi ; SuMo Biomaterials)
Journal of Applied Polymer Science (0021-8995). Vol. 132 (2014), 1, p. Art. no. 41219.
[Artikel, refereegranskad vetenskaplig]

To test the hypothesis that the introduction of a hydrophilic hemicellulose would affect viscoelastic properties and increase water permeability, xyloglucan (XG) was adsorbed onto the surface of microcrystalline cellulose (MCC) in water dispersion prior to the extrusion of 79–80 wt % polylactide acid (PLA), 20 wt % MCC, and 0–1 wt % XG. For comparison, composites of PLA, MCC, and non-absorbed XG were produced. Analysis of thermal properties showed no differences for glass-transition or melting temperatures, but the crystallinity of the films increased with the addition of MCC and XG. Storage modulus of the composite materials increased with XG content; however, at higher humidities storage modulus decreased, probably because of lower interfacial adhesion. Water permeability through the films increased more with the addition of XG adsorbed to the MCC than with the MCC and XG simply mixed in the same amounts.



Denna post skapades 2014-11-07. Senast ändrad 2016-04-20.
CPL Pubid: 205426

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Farmaceutisk teknologi (2005-2014)
SuMo Biomaterials

Ämnesområden

Materialkemi
Polymerkemi

Chalmers infrastruktur

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