Chitosan‐coated paper: Effects of nisin and different acids on the antimicrobial activity

Vartiainen, Jari; Motion, Rose; Kulonen, Heikki; Rättö, Marjaana; Skyttä, Eija; Ahvenainen, Raija

doi:10.1002/app.20701

Cited by 97 publications

(68 citation statements)

References 40 publications

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“…The TS and %E of coated papers were greater than that of uncoated paper (23.94 ± 0.60 MPa; 4.52 ± 0.32%), which means that HPMC coating improved paper strength and ductility. Our results are in agreement with those of Vartiainen et al (2004), who reported that chitosan coating improved the tensile properties of paper and could be regarded as a reinforcement layer. The TS and %E values for HPMC-coated papers in this study are similar to those obtained by Rhim et al (2006) for alginate-or soy protein-coated paperboards.…”

Section: Tensile Propertiessupporting

confidence: 93%

Physical and Mechanical Properties of Hydroxypropyl Methylcellulose–Coated Paper as Affected by Coating Weight and Coating Composition

Khwaldia

2013

BioRes

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Hydroxypropyl methylcellulose (HPMC)-coated papers without plasticizer and plasticized with polyols were prepared, and the effects of coating weight, different plasticizers (glycerol (GLY), sorbitol (SOR), and polyethylene glycol (PEG)), and plasticizer contents (20% to 50%) on the physical and mechanical properties of the resulting biopolymer-coated papers were studied. Coating weight was the most important factor affecting mechanical properties. Conversely, increasing coating weight led to a decrease in gloss and to an increase in tensile strength (TS), elongation at break (%E), and tearing resistance of coated papers. The application of unplasticized HPMC coatings (3 g/m 2 ) on paper reduced water vapor permeability (WVP) and water absorption capacity by 25% as compared with uncoated paper. All plasticizers significantly (p < 0.05) increased WVP and Cobb 60 values of the films. With the exception of PEG, no effect was found with plasticizers on TS and %E of coated papers compared with those without plasticizer. HPMC-coated papers with PEG as a plasticizer showed significantly lower TS and higher %E and tearing resistance than the other plasticized films (p < 0.05). HPMC coating improved tensile properties and tearing resistance of paper and could be regarded as a reinforcement layer.

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Section: Tensile Propertiessupporting

confidence: 93%

Physical and Mechanical Properties of Hydroxypropyl Methylcellulose–Coated Paper as Affected by Coating Weight and Coating Composition

Khwaldia

2013

BioRes

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“…[12][13][14][15][16][17] These reports, however, focus mainly on antimicrobial or medical applications, although barrier properties are also occasionally reported. Several, mostly Japanese, patents on chitosan-cellulose blends exist.…”

Section: Introductionmentioning

confidence: 99%

Packaging-related properties of protein- and chitosan-coated paper

Gällstedt

Brottman

Hedenqvist

2005

Packag. Technol. Sci.

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The mechanical and gas-barrier properties of paper and paperboard coated with chitosan-acetic acid salt (chitosan), whey protein isolate, whey protein concentrate and wheat gluten protein were studied. Paper sheets were solution-coated using a hand applicator. In addition, bi-layer composites of wheat gluten and paper or paperboard were produced by compression moulding, and the chitosan solution was also applied on paperboard using curtain coating. Young's modulus, fracture stress, fracture strain, tearing strength, air permeance and oxygen permeability were assessed. The mechanical and air permeance measurements of solution-coated paper showed that chitosan was the most effective coating on a coat weight basis. This was due to its high viscosity, which limited the degree of penetration into the paper. The proteins, however, also enhanced the strength and toughness of the paper. Compression-moulded wheat gluten/paper or paperboard, as well as curtaincoated chitosan paperboard laminates, showed oxygen barrier properties comparable to those of paper and paperboard coated with commercial barrier materials. None of the composites could be delaminated without fibre rupture, indicating good adhesion between the coatings and the substrates. INTRODUCTIONEnvironmental concerns, including the limitation of greenhouse gases and the presumably higher cost of petrochemicals in the future, have made renewable materials more interesting as a substitute for synthetic oxygen-barrier packaging materials, including ethylene-vinyl alcohol copolymers, poly(vinylidene chloride), polyesters and polyamides. Interesting renewable barrier materials include various proteins and polysaccharides, mainly because of their high content of hydrogen bonds.Even though oils are the group which has been most studied among renewable paints and coatings in non-food applications, 1,2 some studies have considered proteins as coatings on paper. Han and Krochta 3 studied the increase in gloss and the increase in oil resistance of paper coated with whey protein isolate (WPI). Chan and Krochta 4 reported a significant reduction in oxygen permeability (OP) for paperboard coated with denatured and undenatured WPI. Compared to their study, we have used a lower content of plasticizer and we have measured the mechanical properties. Trezza et al. 5 reported a reduction in the OP of paper coated with corn zein (a corn protein). The OP was, however, still significantly higher than that of most conventional polymers. Other studies/patents of protein coatings on paper have focused mostly on grease resistance and/or water permeability, 6-10 or on improving the strength of paper.11 Studies of chitosan coatings on paper, paperboard and cellophane have been reported. [12][13][14][15][16][17] These reports, however, focus mainly on antimicrobial or medical applications, although barrier properties are also occasionally reported. Several, mostly Japanese, patents on chitosan-cellulose blends exist.Many studies have also dealt with whey and other proteins as oxygen-barrier...

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“…Freestanding films of chitosan exhibit very low oxygen permeability as was reported by Butler et al [65]. The possibility of obtaining an oxygen barrier by coating paper with chitosan has also been tested in an experiment in which a copy paper was coated with five layers using a bench-scale rod coater [60]. The total coat weight obtained was 6.9 g/m 2 and the oxygen permeability of this material was reported to be 1.1 (cm 3 mm)/(m 2 day kPa) when using a modified curtain coater on a bench scale.…”

Section: Chitosanmentioning

confidence: 82%

“…However, like other hydrophilic natural biopolymers, its properties as a packaging material also need to be improved. Chitosan exhibits high cohesive energy density due to its relatively high crystallinity and the hydrogen bonds between the molecular chains [57][58][59][60][61][62][63]. A study on composite films consisting of mixtures of chitosan and [52], 95% RH cellulose fibers showed that the films provided a good oxygen barrier [64].…”

Section: Chitosanmentioning

confidence: 99%