Plasma functionalization of polypropylene with acrylic acid

Sciarratta, Vincenzo; Vohrer, U.; Hegemann, Dirk; Müller, Michaela; Oehr, Christian

doi:10.1016/s0257-8972(03)00564-4

Cited by 125 publications

(78 citation statements)

References 27 publications

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“…The broad band observed in the AAc monomer's spectrum, at around 2900-3300 cm -1 , can also be seen in the PlasmaStream's (prewashing) and the PlasmaTreats's spectra (pre & post-washing). This band represents C-H and O-H symmetric stretching [19]. This band is missing from the PlasmaStream spectra postwashing and is further evidence that this film dissolved in the water.…”

Section: Coating Comparison Studymentioning

confidence: 78%

“…Similarly the C-O bending peaks at 1234-1167 cm -1 also undergo a loss of intensity. The peaks near 1727 cm -1 and 1715 cm -1 , represent the carbonyl C=O stretching band, are clearly visible in the monomer and on all the PlasmaStream coating spectra [30]. The peak at 1715 cm -1 is also present on the PlasmaTreat ppAAc coating however, the peak at 1727 cm -1 is absent.…”

Section: Coating Comparison Studymentioning

confidence: 84%

“…These include: radiofrequency (13.56 MHz) parallel plate [14,15,19], glow discharge [16] and two-phase plasma polymerisation processes [20]. The coatings obtained using these techniques displayed similar properties such as the retention of a high degree of monomer structure and functionality.…”

Section: Introductionmentioning

confidence: 99%

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Protein adhesion on water stable atmospheric plasma deposited acrylic acid coatings

Donegan

Dowling

2013

Surface and Coatings Technology

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There is considerable interest in the application of plasma polymerised acrylic acid (ppAAc) coatings due to their ability to enhance the adhesion of cells and proteins. An issue with this coating however it its stability in water and previous studies carried out using low pressure plasmas have demonstrated that high plasma powers are required to achieve water stable coatings. In this paper the use of both helium and air atmospheric plasmas are compared for the deposition of ppAAc coatings. The deposition studies were carried out on silicon wafer substrates using the PlasmaStream TM and PlasmaTreat TM plasma jet deposition systems respectively. The coatings were characterized using contact angle, FTIR, SEM, XPS, ellipsometry and optical profilometry. While both the helium and air plasmas were successful in the deposition of ppAAc coatings, the nm thick films deposited using the PlasmaTreat system exhibited significantly higher levels of water stability, probably due to a higher level of coating cross linking. Ellipsometry measurements demonstrated only a 0.2 nm reduction in the thickness of an 18 nm thick ppAAc coating, when immersed in an aqueous buffer solution for one hour. Protein attachment studies were carried out using a flow cell system, which was monitored using a spectroscopic ellipsometer. This study was carried out with Bovine Serum Albumin (BSA), Immunoglobulin G (IgG) and Fibrinogen (Fg) proteins. In all three cases increased levels of protein adhesion was observed for the ppAAc coating, compared to that obtained on the uncoated silicon wafer substrates.Keywords: Atmospheric Plasma, Thin Film, Nano-coatings, Surface Engineering, Protein Adhesion IntroductionControlling protein adhesion is an important issue affecting many different fields including bio-processing, medical device implants, biosensors, and drug delivery devices [1,2]. When the surface of a material interacts with a biological environment one of the initial interactions is through protein adhesion [3]. Amongst the factors influencing protein adsorption, are surface chemical functionality and morphology [4]. Amongst the techniques that have been investigated to modify the surfaces of polymers prior to protein adhesion studies have been micro patterning and monomer polymerisation by free radical solution, emulsion, grafting as well as plasma processes [5][6][7][8][9]. It has been demonstrated by a number of authors that plasma techniques enable both the surface functionality and morphology to be tailored [10,11]. This makes it possible to create a surface which will inhibit or enhance the rate of protein adhesion onto a biomaterial surface, without changing the properties of the bulk material [12].One surface chemistry that has received considerable attention for cell and protein adhesion has been acrylic acid. Surfaces containing this coating have been reported in applications ranging from platelet adhesion promotion [13], RGD peptide immobilisation [14], attachment of osteoblast-like [15], fibroblast [16] and keratinocyte [17]...

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Section: Coating Comparison Studymentioning

confidence: 78%

Section: Coating Comparison Studymentioning

confidence: 84%

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Protein adhesion on water stable atmospheric plasma deposited acrylic acid coatings

Donegan

Dowling

2013

Surface and Coatings Technology

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“…The ATR-FTIR spectrum of the untreated PP film shows four large peaks in the wavenumber range 3000-2800 cm −1 : the peaks at 2955 and 2873 cm −1 can be attributed to CH 3 asymmetric and symmetric stretching vibrations respectively, while the peaks at 2922 and 2843 cm −1 are due to CH 2 asymmetric and symmetric stretching vibrations respectively. [13,14] The ATR-FTIR spectrum also shows two intense peaks at 1460 and 1378 cm −1 : the peak at 1460 cm −1 is caused by CH 3 asymmetric deformation vibrations or CH 2 scissor vibrations, while the peak at 1378 cm −1 is due to CH 3 symmetric deformation vibrations. The ATR-FTIR spectrum of the untreated PP film also shows numerous small peaks in the wavenumber range 1200-750 cm −1 .…”

Section: Atr-ftir Analysismentioning

confidence: 99%

Comparison between XPS‐ and FTIR‐analysis of plasma‐treated polypropylene film surfaces

Morent

Geyter

Leys

et al. 2008

Surface & Interface Analysis

298

144

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Plasma treatment is often used to modify the surface properties of polymer films, since it offers numerous advantages over the conventional surface modification techniques. In this paper, a polypropylene (PP) film is plasma-treated using a dielectric barrier discharge (DBD) operating in air at medium pressure (5.0 kPa). The modified polymer films are characterized using contact angle measurements, XPS-analysis and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy. Results show that plasma treatment leads to a remarkable decrease in contact angle owing to the implantation of oxygen-containing functional groups. Using XPS and ATR-FTIR, these oxygen-containing groups can be identified as C-O, C O and O-C O. In this paper, it is also shown that XPS is well-suited to provide quantitative chemical analysis of the PP films, while ATR-FTIR can only give qualitative information. To perform quantitative ATR-FTIR measurements, chemical derivatization will be explored in the near future.

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“…Surface modification can be accomplished by increasing the polarity introducing special chemical functionalities like carboxylic groups, or by coating the surfaces with polar thin films, for example, poly(acrylic acid) (PAA). Surface grafting techniques including photo-initiated grafting [10][11][12][13][14], living radical grafting [15], ceric ion induced grafting [16], layer-by-layer ionic grafting [17] and plasma polymerization [18,19] have proven to be effective to graft poly-functional monomers or polymers onto PP surfaces. Among the methods to modify polymers, radical photo-grafting polymerisation appears as an attractive method to impart a variety of functional groups to a polymer [20,21].…”

Section: Introductionmentioning

confidence: 99%

Poly(acrylic acid) surface grafted polypropylene films: Near surface and bulk mechanical response

Fasce¹,

Costamagna²,

Pettarín³

et al. 2008

Express Polym. Lett.

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Abstract. Radical photo-grafting polymerization constitutes a promising technique for introducing functional groups onto surfaces of polypropylene films. According to their final use, surface grafting should be done without affecting overall mechanical properties. In this work the tensile drawing, fracture and biaxial impact response of biaxially oriented polypropylene commercial films grafted with poly(acrylic acid) (PAA) were investigated in terms of film orientation and surface modification. The variations of surface roughness, elastic modulus, hardness and resistance to permanent deformation induced by the chemical treatment were assessed by depth sensing indentation. As a consequence of chemical modification the optical, transport and wettability properties of the films were successfully varied. The introduced chains generated a PAA-grafted layer, which is stiffer and harder than the neat polypropylene surface. Regardless of the surface changes, it was proven that this kind of grafting procedure does not detriment bulk mechanical properties of the PP film.

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Plasma functionalization of polypropylene with acrylic acid

Cited by 125 publications

References 27 publications

Protein adhesion on water stable atmospheric plasma deposited acrylic acid coatings

Protein adhesion on water stable atmospheric plasma deposited acrylic acid coatings

Comparison between XPS‐ and FTIR‐analysis of plasma‐treated polypropylene film surfaces

Poly(acrylic acid) surface grafted polypropylene films: Near surface and bulk mechanical response

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