Plasma modification of polyolefin surfaces

Lee, Keun Taik; Goddard, Julie M.; Hotchkiss, Joseph H.

doi:10.1002/pts.829

Cited by 32 publications

(21 citation statements)

References 32 publications

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“…This effect is due to the increase in other functionalities on the surface and to the loss of species of low molecular weight because of oxidation (LMWOM-low molecular weight oxidized moieties) due to the breakage of polymeric chains on the topmost layers of PLA because of the action of plasma. [13,34,35] It is worth mentioning the important increase in the atomic percentage of oxygen, with maximum values that almost twice the initial value for the untreated material, changing from 19% (untreated sample) to nearly 33% (sample treated with an advance rate of 100 mm·s . This is due to the fact that with low advance speeds, the treatment is more effective since lower rates leads to higher exposure times to atmospheric plasma.…”

Section: Tablementioning

confidence: 99%

“…Atmospheric plasma is a versatile technology, with uniform and reproducible results and it does not damage the environment because it does not generate waste. [12][13][14][15][16] In this paper, the effects of atmospheric plasma processing conditions, nozzlesubstrate distance and advance rate, on PLA surface are assessed by determining the solid surface free energy (SFE) through contact angle measurements. The plasma acting mechanisms are analyzed from a chemical and physical viewpoint.…”

Section: -Introductionmentioning

confidence: 99%

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Surface modification of polylactic acid (PLA) by air atmospheric plasma treatment

Jordá‐Vilaplana

Fombuena

Garcia‐Garcia

et al. 2014

European Polymer Journal

200

104

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Section: Tablementioning

confidence: 99%

Section: -Introductionmentioning

confidence: 99%

Surface modification of polylactic acid (PLA) by air atmospheric plasma treatment

Jordá‐Vilaplana

Fombuena

Garcia‐Garcia

et al. 2014

European Polymer Journal

200

104

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“…Recently, there has been an interest in introducing functional groups in food packaging materials for the purpose of immobilizing bioactive molecules. 1 This concept is attractive in food packaging applications, since it may provide an antimicrobial packaging. Microbial growth occurring on the food surface is one of the main causes of deterioration for both fresh and processed solid food products.…”

Section: Introductionmentioning

confidence: 99%

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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“…The oxidative conditions lead to the formation of OH groups and other oxygen based functionalities on the surface. [ 25 ] These functional groups can be used to attach a siloxane monolayer of GOPTMS. The present epoxide groups were subsequently quenched by the reaction with the amine groups of polymers 2 , 3 , or 4 .…”

Section: Surface Functionalizationmentioning

confidence: 99%

Lab in a Tube: Purification, Amplification, and Detection of DNA Using Poly(2‐oxazoline) Multilayers

Leiske

Hartlieb

Paulenz

et al. 2015

Adv Funct Materials

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Fast and easy purifi cation and amplifi cation of DNA are prerequisites for the development of point-of-care diagnostics. For this reason covalent coatings of amine containing poly(2-oxazoline)s (POx) on glass and poly(propylene) surfaces are prepared, to reversibly bind genetic material directly from biological samples. The polymer is deposited in a layer-by-layer process, whereas initial immobilization of macromolecules on the surface is accomplished by the use of an epoxy functionalized siloxane monolayer. Alternating treatment with polymer and cross-linker leads to the construction of amine containing POx multilayers on the substrates. Successful deposition is investigated by confocal laser scanning microscopy (using labeled polymers), contact angle measurements, as well as refl ectometric interference spectroscopy. The interaction of these layer systems with DNA regarding binding and temperature dependent release is studied using labeled genetic material. Finally, polymerase chain reaction (PCR) vessels are coated with POx layers on the inside, and used for quantitative realtime PCR (qPCR) experiments. It is possible to bind genetic material directly from cell lysates to perform qPCR assays from surface adsorbed DNA within the same tube including amplifi cation, as well as detection. The presented system displays an easy to use device for a point of care diagnostic.

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Plasma modification of polyolefin surfaces

Cited by 32 publications

References 32 publications

Surface modification of polylactic acid (PLA) by air atmospheric plasma treatment

Surface modification of polylactic acid (PLA) by air atmospheric plasma treatment

Modification of cellulose‐based packaging materials for enzyme immobilization

Lab in a Tube: Purification, Amplification, and Detection of DNA Using Poly(2‐oxazoline) Multilayers

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