Biomedical applications of plasma polymerization and plasma treatment of polymer surfaces

Point-to-plane corona discharge is widely used for modifying polymer surfaces for biomedical applications and for sterilization and decontamination. This paper focuses on an experimental investigation of the influence of the single-point and multi-point corona discharge electric field on gel surface. Three types of gelatinous agar were used as the gel medium: blood agar, nutrient agar and Endo agar. The gel surface modification was studied for various time periods and discharge currents.

Download Full-text

Surface Modification of Ti-30Ta Alloy by Electrospun PCL Deposition

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.930 ◽

2016 ◽

Vol 869 ◽

pp. 930-934

Author(s):

Cristiane Mayumi Wada ◽

André Luiz Reis Rangel ◽

Marisa Aparecida de Souza ◽

Rosemeire dos Santos Almeida ◽

Marcos Akira D’Ávila ◽

...

Keyword(s):

Contact Angle ◽

Plasma Treatment ◽

Biomedical Applications ◽

Plasma Reactor ◽

Melting Furnace ◽

Argon Atmosphere ◽

Electrospun Fibers ◽

X Rays ◽

Arc Melting ◽

Hydrophilic Behavior

In this study, PCL electrospun fibers were deposited on the Ti-30Ta alloy for change the surface properties. Experimental Ti-30Ta alloy was obtained by melting titanium and tantalum in arc melting furnace with argon atmosphere. Ingots were homogenized and bars with 10 mm of diameter were obtained in rotative swagging. PCL fibers were deposited on disks of the alloy by electrospinning. Plasma treatment was carried out for change PCL electrospun superficial energy by using stainless steel plasma reactor. Samples were immersed in mineralization solution for apatite growth. Surfaces were evaluated by using SEM, X-rays diffraction and contact angle. Samples exhibited hydrophilic behavior after plasma treatment and mineralization. Results are very interesting for biomedical applications.

Download Full-text

Plasma Coating and Enhanced Dispersion of Carbon Nanotubes

MRS Proceedings ◽

10.1557/proc-791-q10.7 ◽

2003 ◽

Vol 791 ◽

Cited By ~ 2

Author(s):

Peng He ◽

Jie Lian ◽

Donglu Shi ◽

Lumin Wang ◽

Wim van Ooij ◽

...

Keyword(s):

Thin Film ◽

Carbon Nanotubes ◽

Plasma Treatment ◽

Polymer Films ◽

Plasma Polymerization ◽

Plasma Coating ◽

Experimental Results ◽

Multi Wall Carbon Nanotubes ◽

Aligned Carbon Nanotubes ◽

Ultrathin Polymer Films

ABSTRACTUltrathin polymer films have been deposited on both multi-wall and aligned carbon nanotubes using a plasma polymerization treatment. TEM experimental results showed that a thin film of polystyrene layer (several nanometers) was uniformly deposited on the surfaces of the nanotubes including inner wall surfaces of the multi-wall nanotubes. The coated multi-wall nanotubes were mixed in polymer solutions for studying the effects of plasma coating on dispersion. It was found that the dispersion of multi-wall carbon nanotubes in polystyrene composite was significantly improved. The deposition mechanisms and the effects of plasma treatment parameters are discussed.

Download Full-text

A Novel Approach of Promoting Adhesion of Reinforcing Cord to Elastomers by Plasma Polymerization

Polymers ◽

10.3390/polym11040577 ◽

2019 ◽

Vol 11 (4) ◽

pp. 577 ◽

Cited By ~ 4

Author(s):

Wilma Dierkes ◽

André Louis ◽

Jacques Noordermeer ◽

Anke Blume

Keyword(s):

Plasma Treatment ◽

Polyethylene Terephthalate ◽

Plasma Polymerization ◽

Promising Alternative ◽

Resorcinol Formaldehyde ◽

Plasma Activation ◽

Novel Approach ◽

Adhesion System ◽

Adhesion Level ◽

Sulfur Containing

Adhesion of cords to elastomers is crucial for many elastomeric products, such as tires and V-belts. The best adhesion system so far is based on a combination of resorcinol, formaldehyde, and a latex (RFL). However, this cord treatment has serious disadvantages in terms of processing and toxicity. A promising alternative is a plasma treatment of the cords prior to be embedded in the elastomer. For rayon cords, a plasma polymerization of sulfur-containing precursors results in adhesion levels close to RFL treatment. However, for polyethylene terephthalate (PET) cords, this treatment is not satisfactory. For this type of cords, a water-plasma activation followed by a silane dip is more promising, as 72% of the adhesion level of RFL treatment could be achieved. For rayon, an even higher adhesion level was realized.

Download Full-text

Surface modification of plastics by plasma treatment and plasma polymerization and its effect on adhesion

Surface and Interface Analysis ◽

10.1002/sia.740200518 ◽

1993 ◽

Vol 20 (5) ◽

pp. 441-448 ◽

Cited By ~ 32

Author(s):

C. M. Gilbert Carlsson ◽

Kenth S. Johansson

Keyword(s):

Surface Modification ◽

Plasma Treatment ◽

Plasma Polymerization

Download Full-text

Multi-Layer Coating of Ultrathin Polymer Films on Nanoparticles of Alumina by a Plasma Treatment

MRS Proceedings ◽

10.1557/proc-635-c4.28 ◽

2001 ◽

Vol 635 ◽

Cited By ~ 3

Author(s):

Donglu Shi ◽

Zhou Yu ◽

S. X. Wang ◽

Wim J. van Ooij ◽

L. M. Wang ◽

...

Keyword(s):

Plasma Treatment ◽

Polymer Films ◽

Ultrathin Films ◽

Plasma Polymerization ◽

Single Layer ◽

Process Time ◽

Transmission Electron ◽

Ultrathin Polymer Films ◽

Secondary Ion ◽

Layer Coating

AbstractMulti-layer ultrathin polymer films have been deposited on the surfaces of nanoparticles of alumina using a plasma polymerization treatment. The nanoparticles ranged from 10-150 nm in spherical shapes. High-resolution transmission electron microscopy (HRTEM) experiments showed that an extremely thin film of the pyrrole layer (10-20 Å) was uniformly deposited on the surfaces of the nanoparticles. In particular, the particles of all sizes (10-150 nm) exhibited equally uniform ultrathin films indicating well-dispersed nanoparticles in the fluidized bed during the plasma treatment. After single layer coating, hexamethyldisiloxane (HMDSO) was coated again as a second layer onto the surface of pyrrole. Subsequently, a third layer of pyrrole was coated on the top of HMDSO film completing the multi-layer coating process. Time-of-Flight Secondary ion mass spectroscopy (TOFSIMS) experiments confirmed the deposition of these multi-layer thin films on the nanoparticles. The deposition mechanisms and the effects of plasma treatment parameters are discussed.

Download Full-text