Contact-active antibacterial multilayers on fibres: a step towards understanding the antibacterial mechanism by increasing the fibre charge

Illergård, Josefin; Wågberg, Lars; Ek, Monica

doi:10.1007/s10570-015-0629-8

Cited by 21 publications

(30 citation statements)

References 36 publications

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“…However, many of them combine chitosan with other bactericides like silver ions or silver nanoparticles to get a leaching antibacterial effect (Guibal et al 2013;Ma et al 2008;Vimala et al 2010), which makes it difficult to compare the results with the cellulose foams, especially since the testing procedure varies. The studies using PVAm in LbL modified antibacterial cellulose have shown a bacterial reduction greater than 99.9% when using pulp modified with PVAm and polyacrylic acid in similar reduction tests (Illergård et al 2012(Illergård et al , 2015. However, the materials are produced in completely different manner compared to the cellulose foams and it is not possible to compare the antibacterial effect of PVAm as the foam forming process involve other components like CA and SDS.…”

Section: Reducing Bacteriamentioning

confidence: 99%

“…Polyvinylamine (PVAm) is a cationic polymer that is used in the paper industry to increase the strength of paper (BASF 2010). PVAm has good antibacterial properties, due to its primary amine groups, and has been used in several studies to create contact-active antibacterial cellulose using Layer-by-Layer (LbL) modification (Chen et al 2017;Henschen et al 2016;Illergård et al 2011Illergård et al , 2015Westman et al 2009). Chitosan is a cationic polysaccharide derived from naturally occurring chitin through deacetylation, and it is used in cosmetic, food and pharmaceutical products because of its antimicrobial properties (Rinaudo 2006;Sebti et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Ottenhall

Seppänen

2018

Cellulose

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New bio-based packaging materials are highly interesting for replacing conventional fossil based products for a more sustainable society. Waterstable cellulose fiber foams have been produced in a simple one-batch foam-forming process with drying under ambient conditions. The cellulose fiber foams have a low density (33-66 kg/m 3 ) and can inhibit microbial growth; two highly valuable features for insulating packaging materials, especially in combination with stability in water. Cationic chitosan and/or polyvinylamine have been added during the foamforming process to give the foams water-stability and antimicrobial properties. The structural and mechanical properties of the cellulose fiber foams have been studied and the antimicrobial properties have been evaluated with respect to both Escherichia coli, a common model bacteria and Aspergillus brasiliensis, a sporulating mold. The cellulose foams containing chitosan had both good water-stability and good antibacterial and antifungal properties, while the foams containing PVAm did disintegrate in water and did not inhibit fungal growth when nutrients were added to the foam, showing that it is possible to produce a bio-based foam material with the desired characters. This can be an interesting low-density packaging material for protection from both mechanical and microbial damage without using any toxic compounds.

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Section: Reducing Bacteriamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Ottenhall

Seppänen

2018

Cellulose

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“…Three polyelectrolytes are very common, namely, polyvinylamine (PVAm), poly(diallyl dimethyl ammonium chloride) (PDADMAC) and poly(allylamine hydrochloride) (PAH) (Lu and Xiao 2007;Lu et al 2008a,b). In a series of articles, Illergård et al (2011Illergård et al ( , 2012Illergård et al ( , 2013Illergård et al ( , 2015 described the antibacterial effect of a system of PVAm and polyacrylic acid (PAA) on cellulose fibers and found a perfect growth inhibition. By visualization of Escherichia coli by SEM, it was also observed that the bacteria suffered severe damage (Illergård et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of cationic polyelectrolytes in contact-active antibacterial layer-by-layer functionalization

et al. 2017

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Contact-active surfaces have been created by means of the layer-by-layer (LbL) modification technique, which is based on previous observations that cellulose fibers treated with polyelectrolyte multilayers with polyvinylamine (PVAm) are perfectly protected against bacteria. Several different cationic polyelectrolytes were applied, including PVAm, two different poly(diallyl dimethyl ammonium chloride) polymers and two different poly(allylamine hydrochloride) polymers. The polyelectrolytes were self-organized in one or three layers on cellulosic fibers in combination with polyacrylic acid by the LbL method, and their antibacterial activities were evaluated. The modified cellulose fibers showed remarkable bacterial removal activities and inhibited bacterial growth. It was shown that the interaction between bacteria and modified fibers is not merely a charge interaction because a certain degree of bacterial cell deformation was observed on the modified fiber surfaces. Charge properties of the modified fibers were determined based on polyelectrolyte titration and zeta potential measurements, and a correlation between high charge density and antibacterial efficiency was observed for the PVAm and PDADMAC samples. It was demonstrated that it is possible to achieve antibacterial effects by the surface modification of cellulosic fibers via the LbL technique with different cationic polyelectrolytes.

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“…Despite this, a clear multilayer buildup was detected because the amount of adsorbed PVAm increased with every polymer layer, indicating that the aerogel surface is recharged for every layer. This indeed indicates that not all the charges of the aerogel are available for polymer adsorption.Earlier studies of the effect of multilayers of PVAm/PAA as antibacterial materials have demonstrated that bacteria efficiently attach to the surface of the modified material[36]. The porous structure of an aerogel provides a material with a large specific surface area that allows large numbers of bacteria to adhere.…”

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confidence: 99%

Contact-active antibacterial aerogels from cellulose nanofibrils

Henschen

Illergård

Larsson

et al. 2016

Colloids and Surfaces B: Biointerfaces

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Contact-active antibacterial multilayers on fibres: a step towards understanding the antibacterial mechanism by increasing the fibre charge

Cited by 21 publications

References 36 publications

Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Water-stable cellulose fiber foam with antimicrobial properties for bio based low-density materials

Effect of cationic polyelectrolytes in contact-active antibacterial layer-by-layer functionalization

Contact-active antibacterial aerogels from cellulose nanofibrils

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