Surface Modification of Nanoparticles for their Dispersion in Organic Solvents and Polymeric Materials

2010 ◽  
Vol 47 (7) ◽  
pp. 481-484 ◽  
Author(s):  
Motoyuki Iijima
Keyword(s):  
Surface Modification ◽  
Organic Solvents ◽  
Polymeric Materials

Surface Modification of Poly(Vinylchloride) for Manufacturing Advanced Catheters

2020 ◽  
Vol 27 (10) ◽  
pp. 1616-1633 ◽  
Author(s):  
Oana Cristina Duta ◽  
Aurel Mihail Ţîţu ◽  
Alexandru Marin ◽  
Anton Ficai ◽  
Denisa Ficai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Chemical Modification ◽  
Medical Devices ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Modern Medicine ◽  
Structural Failure ◽  
Chemical Grafting ◽  
One Step

Polymeric materials, due to their excellent physicochemical properties and versatility found applicability in multiples areas, including biomaterials used in tissue regeneration, prosthetics (hip, artificial valves), medical devices, controlled drug delivery systems, etc. Medical devices and their applications are very important in modern medicine and the need to develop new materials with improved properties or to improve the existent materials is increasing every day. Numerous reasearches are activated in this domain in order to obtain materials/surfaces that does not have drawbacks such as structural failure, calcifications, infections or thrombosis. One of the most used material is poly(vinylchloride) (PVC) due to its unique properties, availability and low cost. The most common method used for obtaining tubular devices that meet the requirements of medical use is the surface modification of polymers without changing their physical and mechanical properties, in bulk. PVC is a hydrophobic polymer and therefore many research studies were conducted in order to increase the hydrophilicity of the surface by chemical modification in order to improve biocompatibility, to enhance wettability, reduce friction or to make lubricious or antimicrobial coatings. Surface modification of PVC can be achieved by several strategies, in only one step or, in some cases, in two or more steps by applying several techniques consecutively to obtain the desired modification / performances. The most common processes used for modifying the surface of PVC devices are: plasma treatment, corona discharge, chemical grafting, electric discharge, vapour deposition of metals, flame treatment, direct chemical modification (oxidation, hydrolysis, etc.) or even some physical modification of the roughness of the surface.

Comparison of surface modification of polymeric materials for protection from severe oxidative environments using different ion sources

2000 ◽  
Vol 127 (1) ◽  
pp. 18-23 ◽  
Author(s):  
Z. Iskanderova ◽  
J. Kleiman ◽  
Y. Gudimenko ◽  
R.C. Tennyson ◽  
W.D. Morison
Keyword(s):  
Surface Modification ◽  
Polymeric Materials ◽  
Ion Sources

Plasma Surface Modification of Polymeric Materials

2005 ◽  
Vol 890 ◽  
Author(s):  
Ali Razavi
Keyword(s):  
Surface Modification ◽  
Surface Analysis ◽  
Polymeric Materials ◽  
Fluorinated Polymers ◽  
Plasma Surface Modification ◽  
Plasma Surface ◽  
Ethylene Propylene ◽  
Holding Power ◽  
Pressure Sensitive ◽  
Fluorinated Ethylene Propylene

ABSTRACTThis study was undertaken to improve the bonding of fluorinated and non-fluorinated polymers to acrylic and silicone based adhesives. The polymeric materials were exposed to plasma which is comprised of methane and a second gas selected from air, Oxygen and Nitrogen or a mixture thereof. By application of surface analysis (XPS), the optimized functionality can be incorporated in the surface of desired polymers to enhance the bond ability of prepared films for pressure sensitive tape applications. Perfluoroalkoxy-tetrafluoroethylene copolymer PFA, fluorinated ethylene-propylene FEP, Polytetrafluoroethylene PTFE, and Polyester materials were exposed to this plasma. The treated samples were coated with adhesives and the adhesion to steel, holding power and other properties associated with tapes performance were studied.

Noncovalent surface modification of carbon nanotubes for solubility in organic solvents

Carbon ◽  
2006 ◽  
Vol 44 (8) ◽  
pp. 1613-1616 ◽  
Author(s):  
Yi-Tao Liu ◽  
Wei Zhao ◽  
Zhen-Yu Huang ◽  
Yan-Fang Gao ◽  
Xu-Ming Xie ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Modification ◽  
Organic Solvents

Room-Temperature Hydrogen Absorption of Titanium with Surface Modification by Organic Solvents

2019 ◽  
Vol 123 (32) ◽  
pp. 19269-19274 ◽  
Author(s):  
Keita Shinzato ◽  
So Hamamoto ◽  
Hiroki Miyaoka ◽  
Takayuki Ichikawa
Keyword(s):  
Surface Modification ◽  
Organic Solvents ◽  
Hydrogen Absorption ◽  
Room Temperature

scholarly journals Improvement of hydrophilicity of polyamide using atmospheric pressure plasma jet

BIBECHANA ◽  
2020 ◽  
Vol 17 ◽  
pp. 133-138 ◽  
Author(s):  
H B Baniya ◽  
R P Guragain ◽  
B Baniya ◽  
G Qin ◽  
D P Subedi
Keyword(s):  
Material Processing ◽  
Surface Modification ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Polymeric Materials ◽  
Plasma Jet ◽  
Angle Measurement ◽  
Atmospheric Pressure Plasma Jet ◽  
High Voltage Power Supply ◽  
Pressure Plasma

Atmospheric Pressure Plasma Jet (APPJ) has many applications in material processing such as surface modification and biomedical material processing. APPJ has been generated by a high voltage power supply (0-20 KV) at an operating frequency of (20-30) 23 kHz. This paper reports the generation and characterization of APPJ in Argon environment and its application in the surface modification of polymeric materials. The discharge has been characterized by optical and electrical methods. In order to characterize the plasma jet, its electron temperature and electron density has been determined by optical emissions spectroscopy. The surface properties of the untreated and plasma treated Polyamide (PA) samples were characterized by contact angle measurement and surface energy analysis. BIBECHANA 17 (2020) 133-138

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