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High Performance Polysodium Acrylate Superabsorbents Utilizing Microfibrillated Cellulose to Augment Gel Properties

Mikael Larsson (Institutionen för kemi- och bioteknik, Farmaceutisk teknologi ; SuMo Biomaterials) ; Mats Stading (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer) ; Anette Larsson (Institutionen för kemi- och bioteknik, Farmaceutisk teknologi ; SuMo Biomaterials)
Soft Materials (1539-445X). Vol. 8 (2010), 3, p. 207-225.
[Artikel, refereegranskad vetenskaplig]

Microfibrillated cellulose was utilized at low concentrations as a filler material, added prior to free radical polymerization, in cross-linked superabsorbent polysodium acrylate hydrogels. The effect of microfibrillated cellulose concentration on equilibrium swelling, shear modulus after synthesis, and shear modulus at equilibrium swelling was studied at different degree of cross-linking. For the characterization of the microfibrillated cellulose optical microscopy, atomic force microscopy, and transmittance analysis were used. The shear modulus of the samples was determined using uniaxial compression analysis. The swelling of the gels was determined using classical gravimetrical measurements. It was found that microfibrillated cellulose was highly efficient in increasing the shear modulus of the gels. Furthermore, the microfibrillated cellulose was found to have the same effect on the swelling and shear modulus at equilibrium swelling as the same mass of the conventional covalent cross-linker N,N'-methylenebisacrylamide (MBA), while in fact improving the fracture resistance of the gels. In conclusion, microfibrillated cellulose shows great potential as an additive to enhance the performance of soft materials.

Nyckelord: Hydrogels, MFC, Superabsorbents, elastic-modulus, rheological properties, rayleigh-scattering, swelling, properties, nanocomposite gels, polymer networks, hydrogels, reinforcement, composites, behaviors



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Denna post skapades 2010-09-17. Senast ändrad 2016-09-06.
CPL Pubid: 126533

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Farmaceutisk teknologi (2005-2014)
SuMo Biomaterials
Institutionen för material- och tillverkningsteknik, Polymera material och kompositer

Ämnesområden

Materialvetenskap
Materialteknik

Chalmers infrastruktur

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