Surface Modification of Polyethylene

Desai, Shrojal M.; Singh, R. P.

doi:10.1007/b13524

Cited by 114 publications

(78 citation statements)

References 229 publications

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“…7,8 Several strategies aimed at the integration of bioactive compounds into the surface of conventional packaging materials have been developed, for example, plasma treatment 9 or other surface modifi cations of plastic materials. 10,11 These show good perspectives also for the controlled release of these antimicrobials when they are used in contact with the product materials. 12,13,14,15 However, most of these studies have considered only non-renewable materials.…”

Section: Introductionmentioning

confidence: 97%

Modification of cellulose‐based packaging materials for enzyme immobilization

Mascheroni

Capretti²,

Marengo

et al. 2009

Packag Technol Sci

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SUMMARYActive cellulose-based packaging materials were prepared by binding lysozyme to paper modifi ed with anionic polyelectrolytes. Polyelectrolytes improve the paper binding capacity towards the positively charged lysozyme and play a protective role towards lysozyme activity during the paper-making process. The charge density of paper was increased by incorporating carboxymethylcellulose (CMC) or polygalacturonic acid (PGA). The presence of either CMC or PGA greatly increased the amount of bound lysozyme, and the stability of its binding towards buffers or towards non-ionic chaotropes which disrupt the three dimensional structure in macromolecules (urea, 8 M). Binding of lysozyme to modifi ed papers was sensitive to anionic detergents (sodium dodecyl sulphate, 1%) and to non-chaotrope salts (NaCl, 0.5M). These data provide information about the nature of the interactions between the protein and the various types of paper, and provide insights on how to preserve the activity of lysozyme-loaded paper. The polymers used for lysozyme immobilization were found to affect only marginally the structural and functional properties of the antimicrobial protein, and to facilitate the recovery of structural features of the protein after heat treatment. Presence of a negative polyelectrolyte (and of CMC in particular) improves the thermal stability of the protein, making it resistant to thermal inactivation, even under the conditions used for drying processes without compromising the paper's mechanical properties. The activity measurements showed that paperbound lysozyme retains its lytic (and therefore, antimicrobial) activity against the cell walls of Micrococcus lysodeikticus, the target microrganism used as standard for lysozyme bioassays.

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Section: Introductionmentioning

confidence: 97%

Modification of cellulose‐based packaging materials for enzyme immobilization

Mascheroni

Capretti²,

Marengo

et al. 2009

Packag Technol Sci

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“…Such surface modifications are quite rough and can thus possibly lead to unwanted side-effects such as a faster degradation rate and a reduction of mechanical performance (Chong et al, 2007, Desmet et al, 2009). In addition, research indicated that these techniques can lead to irregular surface etching and that the degree of modification strongly depends on molecular weight, crystallinity or tacticity and may therefore not be reproducible (Goddard & Hotchkiss, 2007, Desai & Singh, 2004. Moreover, it is clear that these wet-chemical techniques use substantial amounts of water or other liquids and consequentially generate hazardous chemical waste.…”

Section: Polybutylene Succinate (Pbs)mentioning

confidence: 99%

Non-Thermal Plasma Surface Modification of Biodegradable Polymers

Morent¹

2012

Biomedical Science, Engineering and Technology

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“…Recently, there has been an interest in introducing specifi c reactive functional groups for the purpose of covalently immobilizing bioactive molecules on the surface. This concept has been researched in the biomedical fi eld for the development of tissue engineering scaffolds, antimicrobial textiles, hemocompatible in-dwelling devices and drug delivery systems 7,8 . It is also attractive in food packaging, as it allows for non-migratory active packaging applications such as antimicrobial packaging or in-package processing.…”

Section: Introductionmentioning

confidence: 99%

Plasma modification of polyolefin surfaces

2008

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In order to functionalize the surface of blown low-density polyethylene (LDPE) and cast polypropylene (CPP) fi lms, and ultimately to maximize the attachment of active molecules onto them, the optimum treatment parameters of capacitivelycoupled radio-frequency (13.56 MHz) oxygen plasma were investigated by using contact angle, toluidine blue dye assay, X-ray Photoelectron Spectroscopy ( confi rmed the presence of carboxylic acids on LDPE and CPP fi lms. By exposing the plasma-treated sample to air rather than water and treating fi lms repeatedly with oxygen plasma, a higher carboxyl group concentration could be obtained. Copyright

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Surface Modification of Polyethylene

Cited by 114 publications

References 229 publications

Modification of cellulose‐based packaging materials for enzyme immobilization

Modification of cellulose‐based packaging materials for enzyme immobilization

Non-Thermal Plasma Surface Modification of Biodegradable Polymers

Plasma modification of polyolefin surfaces

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