Plasma surface treatments of poly(l-lactic acid) (PLLA) and poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV)

Ferreira, Betina M. P.; Pinheiro, L. M.; Nascente, P. A. P.; Ferreira, Marcelo Juni; Duek, Eliana A. R.

doi:10.1016/j.msec.2008.07.026

Cited by 76 publications

(45 citation statements)

References 10 publications

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“…Most of the modifications are performed using low-temperature or "cold" plasma [48]. When we speak of plasma, we mean the highly ionized gas consisting of neutral and charged particles (ions, radicals, excited molecules, and electrons), wherein the total charge remains neutral [49]. Plasma can provide modification of the upper layer of polymer surface without using solvent or generating chemical waste and with less degradation and roughening of the material compared with many wet chemical treatments [50].…”

Section: Plasma-treated Polymermentioning

confidence: 99%

Wettability and Other Surface Properties of Modified Polymers

Kasálková¹,

Slepička²,

Kolská³

et al. 2015

Wetting and Wettability

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Surface wettability is one of the crucial characteristics for determining of a material's use in specific application. Determination of wettability is based on the measurement of the material surface contact angle. Contact angle is the main parameter that characterizes the drop shape on the solid surface and is also one of the directly measurable properties of the phase interface. In this chapter, the wettability and its related properties of pristine and modified polymer foils will be described. The wettability depends on surface roughness and chemical composition. Changes of these parameters can adjust the values of contact angle and, therefore, wettability. In the case of pristine polymer materials, their wettability is unsuitable for a wide range of applications (such as tissue engineering, printing, and coating). Polymer surfaces can easily be modified by, e.g., plasma discharge, whereas the bulk properties remain unchanged. This modification leads to oxidation of the treated layer and creation of new chemical groups that mainly contain oxygen. Immediately after plasma treatment, the values of the contact angles of the modified polymer significantly decrease.In the case of a specific polymer, the strongly hydrophilic surface is created and leads to total spreading of the water drop. Wettability is strongly dependent on time from modification.Wettability plays a key role, e.g., in the development of biomaterials in tissue engineering and regenerative medicine. Biocompatibility tests of the cell adhesion, proliferation and viability are performed in an aqueous medium, and it is necessary to control the surface wettability. Various cell types have different requirements on surface properties, but while maintaining suitable parameters, the optimal value of © 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.water contact angle for cell adhesion is in the interval of 50-70°. In the case of polymers, which have usually higher values of contact angles, the decrease in water contact angle and adjustment of the surface may be accomplished by introducing selected chemical groups (by plasma treatment), chemical compounds (by grafting, i.e., chemical bath deposition), or nanoparticles. In the case of grafting of polyethylene glycol (PEG) on the plasma activated high-density polyethylene was under "properly" selected conditions of modification (molecular weight of PEG, concentration of PEG in solution) prepared layers that positively influenced the cell adhesion. In addition, low concentration of gold nanoparticles increased the number of adhered cells without decreasing cell viability.Whether the surface of the polymeric substrate is attractive for the adhesion and proliferation of cells is determined not only by wettability but also by a range of other surface properties...

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Section: Plasma-treated Polymermentioning

confidence: 99%

Wettability and Other Surface Properties of Modified Polymers

Kasálková¹,

Slepička²,

Kolská³

et al. 2015

Wetting and Wettability

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show abstract

“…Plasma treatment can avoid wet chemical treatment and consequent degradation. Nonthermal plasma treatment at low or medium pressure is usually used [6][7][8][9] at a gas temperature less than the 200°C PLA decomposition temperature.…”

Section: Introductionmentioning

confidence: 99%

Polylactic acid surface activation by atmospheric pressure dielectric barrier discharge plasma

et al. 2014

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Polylactic acid (PLA) is suitable for applications in packaging and biomedicine due to its biodegradability. To improve PLA surface adhesion a plasma-chemical treatment using nonthermal plasma generated in ambient air via diffuse coplanar surface barrier discharge (DCSBD) was used. The optimal treatment time and power were investigated. Interaction between active plasma species and the polymer surface, and the resulting surface changes were studied by contact angle measurement, surface energy determination, FTIR, and XPS. The most hydrophilic surface was obtained after only 3-4 s treatment. Treatment up to 10 s did not damage the polymer but longer treatments (30 and 60 s) caused partial degradation. The plasma broke C-C/C-H bonds and formed more C-O, O-C=O and C-O-C bonds. During storage surface oxygen decreased and a negligible amount of nitrogen was adsorbed. The oxygen-containing functional groups probably sank into the PLA volume after treatment.

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“…(a) (b) (c) The most common polyhydroxyalkanoate subjected to plasma treatments is the co-polymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and oxygen plasmas have been widely employed to modify this co-polymer , Kose et al, 2003b, Kose et al, 2003a, Ferreira et al, 2009. A low pressure oxygen plasma was employed to PHBV films containing 8% hydroxyvalerate in its structure by Hasirci et al (Hasirci et al, 2003).…”

Section: Wwwintechopencommentioning

confidence: 99%

Non-Thermal Plasma Surface Modification of Biodegradable Polymers

Morent¹

2012

Biomedical Science, Engineering and Technology

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Plasma surface treatments of poly(l-lactic acid) (PLLA) and poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV)

Cited by 76 publications

References 10 publications

Wettability and Other Surface Properties of Modified Polymers

Wettability and Other Surface Properties of Modified Polymers

Polylactic acid surface activation by atmospheric pressure dielectric barrier discharge plasma

Non-Thermal Plasma Surface Modification of Biodegradable Polymers

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