The chemistry of deposits formed from acrylic acid plasmas

Alexander, Morgan R.; Đức, Trần Minh

doi:10.1039/a708064f

Cited by 143 publications

(115 citation statements)

References 6 publications

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“…35 In this study, we used plasma polymerization, under lowpower conditions, to deposit acrylic acid onto medical-grade silicone elastomers with good functional retention. Alexander et al 27 demonstrated that deposits formed under an energydeficient regime have an elemental and functional composition similar to that of conventional acrylic acid. The presence of surface acid groups increases the number of oxygencontaining species on the surface, which correlates positively with surface wettability, and in most cases cell adhesion.…”

Section: Discussionmentioning

confidence: 99%

“…Parameters were optimized based on spectra from similarly prepared surfaces in the literature. 27 Static water contact angles (WCA) were measured by dropping 2 mL of distilled water onto the sample surface via a Hamilton syringe, and recording the angle between the edge of the water droplet and the surface plane using a goniometer (Rame Hart, Mountain Lakes, NJ). Two points on each sample were measured from three replicate preparations.…”

Section: Production Of Plasma-polymerized Surfaces (Carriers)mentioning

confidence: 99%

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A Chemically Defined Carrier for the Delivery of Human Mesenchymal Stem/Stromal Cells to Skin Wounds

Walker

Mistry²,

Smith³

et al. 2012

Tissue Engineering Part C: Methods

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Skin has a remarkable capacity for regeneration, but age-and diabetes-related vascular problems lead to chronic non-healing wounds for many thousands of U.K. patients. There is a need for new therapeutic approaches to treat these resistant wounds. Donor mesenchymal stem/stromal cells (MSCs) have been shown to assist cutaneous wound healing by accelerating re-epithelialization. The aim of this work was to devise a low risk and convenient delivery method for transferring these cells to wound beds. Plasma polymerization was used to functionalize the surface of medical-grade silicone with acrylic acid. Cells attached well to these carriers, and culture for up to 3 days on the carriers did not significantly affect their phenotype or ability to support vascular tubule formation. These carriers were then used to transfer MSCs onto human dermis. Cell transfer was confirmed using an MTT assay to assess viable cell numbers and enhanced green fluorescent protein-labeled MSCs to demonstrate that the cells post-transfer attached to the dermis. We conclude that this synthetic carrier membrane is a promising approach for delivery of therapeutic MSCs and opens the way for future studies to evaluate its impact on repairing difficult skin wounds.

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Section: Discussionmentioning

confidence: 99%

Section: Production Of Plasma-polymerized Surfaces (Carriers)mentioning

confidence: 99%

A Chemically Defined Carrier for the Delivery of Human Mesenchymal Stem/Stromal Cells to Skin Wounds

Walker

Mistry²,

Smith³

et al. 2012

Tissue Engineering Part C: Methods

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show abstract

“…1,6,7,12h16 Recently we used surface analytical techniques (XPS and static SIMS) and functional group derivatization to characterize the chemistry of plasma-polymerized acrylic acid (ppAAc). 11 We determined that deposits formed at low plasma power had a surface chemistry similar to conventional poly(acrylic acid) (PAA), whereas the chemistry of deposits formed at high power contained a greater proportion of ester functionalities. All applications of plasma polymers require good bonding of the polymer to the substrate.…”

Section: Introductionmentioning

confidence: 99%

Interfacial interactions of plasma-polymerized acrylic acid and an oxidized aluminium surface investigated using XPS, FTIR and poly(acrylic acid) as a model compound

Alexander¹,

Payan²,

Đức³

1998

Surf. Interface Anal.

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116

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X‐ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) are used to characterize the interface between poly(acrylic acid) (PAA) and an aluminium oxyhydroxide (AlOOH) surface. Reaction of the PAA carboxylic acid functionality with hydroxyl groups at the surface of the oxide to form a monodentate carboxylate complex C(O)OAl was identified by FTIR. The degree of conversion of the acid to the salt at the interface was estimated to be 40% from the XPS analysis of PAA overlayers of varying thickness. An equivalent reaction was identified at the interface between AlOOH and a monolayer of strongly bonded plasma‐polymerized acrylic acid (ppAAc) that remained after solvent washing. The resistance of the monolayer of ppAAc to solvent washing was attributed to the formation of interfacial carboxylate complexes with the AlOOH surface. © 1998 John Wiley & Sons, Ltd.

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“…Deconvolution of all peaks was carried out using a constrained fitting procedure 16 after subtraction of a simple Shirley-type background. The full width at half-maximum of all peaks was constrained to be equal within each core level.…”

Section: Surface Chemical Analysismentioning

confidence: 99%

Wettability conversion of ultrafast laser structured copper surface

Long¹,

Zhong²,

Fan³

et al. 2015

Journal of Laser Applications

151

112

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The wettability of metal oxides is vital to many applications including water erosion, filtration, and bioimplantation. In this work, the authors studied the wettability conversion behavior of picosecond laser structured copper surfaces in different atmospheres. The copper surfaces showed hydrophilicity initially after being irradiated by a picosecond laser. However, when they were stored in ambient air, their contact angles increased over time and became highly hydrophobic finally. The storage atmosphere influenced this process greatly, the atmosphere rich in CO2 or O2 would restrain the wettability transition, but the organic-rich and vacuum atmosphere would accelerate it. Detailed surface chemical analysis revealed that the adsorption of organic matters from the air played an important role in this wettability conversion process.

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The chemistry of deposits formed from acrylic acid plasmas

Cited by 143 publications

References 6 publications

A Chemically Defined Carrier for the Delivery of Human Mesenchymal Stem/Stromal Cells to Skin Wounds

A Chemically Defined Carrier for the Delivery of Human Mesenchymal Stem/Stromal Cells to Skin Wounds

Interfacial interactions of plasma-polymerized acrylic acid and an oxidized aluminium surface investigated using XPS, FTIR and poly(acrylic acid) as a model compound

Wettability conversion of ultrafast laser structured copper surface

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