Characterization of the Ageing of Plasmadeposited Polymer Films: Global Analysis of Xray Photoelectron Spectroscopy Data

Gengenbach, Thomas R.; Chatelier, Ronald C.; Griesser, Hans J.

doi:10.1002/(sici)1096-9918(199604)24:4<271::aid-sia116>3.3.co;2-a

Cited by 70 publications

(132 citation statements)

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“…These findings agree well with results obtained by other groups showing that oxidation processes support stabilization of the a-C:H:N plasma polymer starting several days after deposition [11,12,16]. Some studies, however, report enhanced adhesion and spreading within hours post seeding of mammalian cells on amine or amide containing surface coatings [3,10,32].…”

Section: Resultssupporting

confidence: 92%

“…The chemical changes were found to saturate after about 20 days of aging in air (21°C, 65% RH), which agrees well with findings by other groups [16]. Using dry air (or nitrogen) slows down the degradation mechanism, revealing the influence of humidity [11,16].…”

Section: Resultssupporting

confidence: 89%

“…Plasma polymers containing primary amino groups are known to show aging effects, i.e. oxidation reactions yielding the formation of amides (among other functional groups) [11,13,14]. Immersion in water results in weight loss and removal of nitrogen groups from the residual deposit, e.g., by hydrolysis of imine groups.…”

Section: Resultsmentioning

confidence: 99%

“…Degradation effects such as oxidation and leaching of low molecular weight fragments that are known to occur for amino-functional plasma polymers, however, require special handling [9,[11][12][13][14][15][16]. Prior to cell attachment a-C:H:N-coated samples are therefore stored in air for several weeks, thermally treated (in vacuum) and/or washed with solvents, while the media is frequently exchanged during cell growth [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Considering the degradation effects of amino-functional plasma polymer coatings for biomedical application

Hegemann¹,

Hanselmann²,

Guimond³

et al. 2014

Surface and Coatings Technology

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Materials for biomedical applications typically involve surface engineering. Scaffolds used for tissue engineering, for example, require a surface functionalization in order to support cell growth. The deposition of functional plasma polymer coatings seems to be an attractive approach to modify substrates for biomedical applications. Possible degradation of highly functional plasma polymers and the effect of its degradation products on cell growth, however, are not yet investigated in detail. Plasma polymer formation is governed by gas phase (mainly determining the chemical composition) and surface processes (inducing cross-linking) which both influence the incorporation of amino groups in a-C:H:N coatings deposited by NH 3 /C 2 H 4 discharges. Aging is studied in air and in aqueous conditions revealing the degradation of such plasma polymers (loss in thickness and loss of amino groups). Degradation products seem to influence viability and proliferation of mouse skeletal muscle cells on electrospun poly(ε-caprolactone) scaffolds. Thus, possible chemical changes as a function of time or exposure to different media must be taken into account in the design of functional plasma polymer coatings for biomedical applications in order to avoid possible adverse effects on cell growth.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Considering the degradation effects of amino-functional plasma polymer coatings for biomedical application

Hegemann¹,

Hanselmann²,

Guimond³

et al. 2014

Surface and Coatings Technology

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show abstract

“…However, the hydrophilicity of the surfaces is not stable over time 12 . In order to enhance the long-term stability, the plasma treated surface can be chemically modified after or during the plasma process [13][14][15] . This treatment is normally performed by adding a reactive monomer species into the gas phase during the plasma process; these monomers then polymerize from the created radicals of the polymer surface.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process

Schöller

Baumann

Hegemann

et al. 2014

JoVE

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In order to modify the surface tension of commercial available track-edged polymer membranes, a procedure of surface-initiated polymerization is presented. The polymerization from the membrane surface is induced by plasma treatment of the membrane, followed by reacting the membrane surface with a methanolic solution of 2-hydroxyethyl methacrylate (HEMA). Special attention is given to the process parameters for the plasma treatment prior to the polymerization on the surface. For example, the influence of the plasma-treatment on different types of membranes (e.g. polyester, polycarbonate, polyvinylidene fluoride) is studied. Furthermore, the time-dependent stability of the surface-grafted membranes is shown by contact angle measurements. When grafting poly(2-hydroxyethyl methacrylate) (PHEMA) in this way, the surface can be further modified by esterification of the alcohol moiety of the polymer with a carboxylic acid function of the desired substance. These reactions can therefore be used for the functionalization of the membrane surface. For example, the surface tension of the membrane can be changed or a desired functionality as the presented light-responsiveness can be inserted. This is demonstrated by reacting PHEMA with a carboxylic acid functionalized spirobenzopyran unit which leads to a light-responsive membrane. The choice of solvent plays a major role in the postmodification step and is discussed in more detail in this paper. The permeability measurements of such functionalized membranes are performed using a Franz cell with an external light source. By changing the wavelength of the light from the visible to the UV-range, a change of permeability of aqueous caffeine solutions is observed. Video LinkThe video component of this article can be found at

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Modification of polysulfone membranes. 2. Plasma grafting and plasma polymerization of acrylic acid

Gancarz¹,

Poźniak

Bryjak

et al. 1999

Acta Polym.

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Polysulfone membranes were modified with acrylic acid using plasma initiated graft polymerization (both in solution and vapor phase) and plasma polymerization. Changes on the surface were monitored by contact angle measurements and FTIR‐ATR technique. Pore size and ultrafiltration properties were also evaluated. Grafting in solution gave as a result hydrophobic membranes with pore size diameter signficantly reduced. Such membranes lost their ultrafiltration properties. Grafting in vapor phase seems to give brush‐like structure. Membranes possess hydrophilic surface and unique filtration properties in basic environment. Plasma polymerization of acrylic acid on the PSU surface creates a layer of material highly reminding pure poly(acrylic acid). Performance of such membranes was also pH‐dependent showing better properties in basic solution.

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Characterization of the Ageing of Plasmadeposited Polymer Films: Global Analysis of Xray Photoelectron Spectroscopy Data

Cited by 70 publications

References 0 publications

Considering the degradation effects of amino-functional plasma polymer coatings for biomedical application

Considering the degradation effects of amino-functional plasma polymer coatings for biomedical application

Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process

Modification of polysulfone membranes. 2. Plasma grafting and plasma polymerization of acrylic acid

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