Oxygen permeability of amylose and amylopectin films

Forssell, Pirkko; Lahtinen, Riitta; Lahelin, Mika; Myllärinen, Päivi

doi:10.1016/s0144-8617(01)00175-8

Cited by 177 publications

(78 citation statements)

References 10 publications

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“…Indeed, studies have shown that under dry or moderate humidities amylose films are mechanically stronger and exhibit better gas barrier properties than amylopectin films (Forssell et al 2002;Myllarinen et al 2002a, b). Research has therefore focused on amylopectin-nanocellulose composites.…”

Section: Amylopectinmentioning

confidence: 99%

Microfibrillated cellulose and new nanocomposite materials: a review

2010

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Due to their abundance, high strength and stiffness, low weight and biodegradability, nano-scale cellulose fiber materials (e.g., microfibrillated cellulose and bacterial cellulose) serve as promising candidates for bio-nanocomposite production. Such new high-value materials are the subject of continuing research and are commercially interesting in terms of new products from the pulp and paper industry and the agricultural sector. Cellulose nanofibers can be extracted from various plant sources and, although the mechanical separation of plant fibers into smaller elementary constituents has typically required high energy input, chemical and/or enzymatic fiber pre-treatments have been developed to overcome this problem. A challenge associated with using nanocellulose in composites is the lack of compatibility with hydrophobic polymers and various chemical modification methods have been explored in order to address this hurdle. This review summarizes progress in nanocellulose preparation with a particular focus on microfibrillated cellulose and also discusses recent developments in bio-nanocomposite fabrication based on nanocellulose.

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Section: Amylopectinmentioning

confidence: 99%

Microfibrillated cellulose and new nanocomposite materials: a review

2010

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“…This corresponds well to OP data for PONP and HONP S films in this work. Furthermore, Forssell et al 21 showed that amylopectin films exhibited increased OP with 10% glycerol compared to films without glycerol, while amylose films were unaffected by the glycerol content.…”

Section: Opmentioning

confidence: 99%

Effects of film forming and hydrophobic properties of starches on surface sized packaging paper

2007

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The effect on mechanical and barrier properties upon addition of glycerol to temperature-responsive hydrophobically modified (HM) potato starch was studied on free films. The addition of glycerol lowered the glass transition temperature, the storage modulus, and the water vapor permeability (WVP) for the HM starch films. The HM starch phase separates upon cooling below an upper critical temperature into a solid and a liquid phase. Adding glycerol to the warm starch solution had an inhibiting effect on the particulate precipitation. Substrates surface sized with HM starch with various amounts of glycerol were investigated with respect to barrier properties; WVP, contact angle and Cobb values. Hydroxypropylated starch was used as a reference. Cobb values and WVP results on surface-sized substrates indicated that the film formation properties of the starches were of great importance for the final surface properties. Good film formation properties were essential for the gas barrier and water resistance while they were less important for high contact angles. The WVP decreased as the glycerol content of the sizes increased, but no sufficient water vapor barrier could be obtained. The HM starches investigated in this work provided good oxygen barrier and the contact angles indicated a hydrophobic character of the surface. The role of the precipitate was investigated, and surface sizing with the precipitate gave low WVP and high contact angles despite its poor film-forming properties under the experimental conditions. Cobb 60 values were slightly improved for HM starch with increasing glycerol content over glycerol-free sizing.

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“…Films based on polysaccharides and proteins have been reported as effective barriers to gas transport (O 2 , CO 2 ), although they present high water vapor permeability (FORSELL et al, 2002). The main functional properties (mechanical and barrier properties) of these hydrophilic materials depend on their water content.…”

Section: Introductionmentioning

confidence: 99%

Water barrier properties of starch-clay nanocomposite films

Slavutsky

Bertuzzi

Armada

2012

Braz. J. Food Technol.

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SummaryThe functional properties of corn starch based films were improved by incorporating nanoclay (Montmorillonite). Nanoclay was incorporated in the polymer matrix using two different methodologies and the films were formed by casting. The effect of film preparation methodology and of the nanoclay concentration on the physicochemical properties of the films was studied. Depending on film preparation method used, intercalated or exfoliated nanocomposite films were obtained. The FTIR spectra showed a strong interaction between the montmorillonite and the starch molecules. Opacity was dependent on the nanoclay dispersion method used. Water vapor solubility and permeability decreased with increasing montmorillonite content and were affected by the dispersion method. Water diffusion was only dependent on the nanoclay content due to the increase in tortuosity of the diffusion path, caused by the nanoparticles. The results showed that the incorporation of 5% of montmorillonite using an adequate dispersion method, improved the water resistance and barrier properties of corn starch based films. Nanoparticles reduced the damage caused to the properties of these hydrophilic films by the increase in moisture content.

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Oxygen permeability of amylose and amylopectin films

Cited by 177 publications

References 10 publications

Microfibrillated cellulose and new nanocomposite materials: a review

Microfibrillated cellulose and new nanocomposite materials: a review

Effects of film forming and hydrophobic properties of starches on surface sized packaging paper

Water barrier properties of starch-clay nanocomposite films

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