Surface modification of polyamide 12 angioplasty balloons by photochemical reaction with an aromatic azide

2018 ◽  
Vol 30 (1) ◽  
pp. 51-57 ◽  
Author(s):  
Simone D'Onofrio ◽  
Fabio Bignotti
Keyword(s):  
Surface Modification ◽  
Photochemical Reaction ◽  
Polyamide 12 ◽  
Aromatic Azide

scholarly journals Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

2018 ◽  
Vol 15 (7) ◽  
pp. 1800032 ◽  
Author(s):  
Alaa Almansoori ◽  
Robert Masters ◽  
Kerry Abrams ◽  
Jan Schäfer ◽  
Torsten Gerling ◽  
...  
Keyword(s):  
Surface Modification ◽  
Laser Sintering ◽  
Polyamide 12 ◽  
Plasma Treatments ◽  
Standard Powder

Surface Modification by Low-Pressure Plasma of Polyamide 12 (PA12). Improvement of the Water Barrier Properties

Langmuir ◽  
2002 ◽  
Vol 18 (26) ◽  
pp. 10411-10420 ◽  
Author(s):  
F. Dreux ◽  
S. Marais ◽  
F. Poncin-Epaillard ◽  
M. Métayer ◽  
M. Labbé
Keyword(s):  
Surface Modification ◽  
Barrier Properties ◽  
Low Pressure ◽  
Polyamide 12 ◽  
Water Barrier ◽  
Pressure Plasma ◽  
Low Pressure Plasma

scholarly journals Photochemical reaction on graphene surfaces controlled by substrate-surface modification with polar self-assembled monolayers

2020 ◽  
Vol 22 (3) ◽  
pp. 1268-1275 ◽  
Author(s):  
Ryo Nouchi ◽  
Kei-ichiro Ikeda
Keyword(s):  
Surface Modification ◽  
Charge Carrier ◽  
Chemical Reaction ◽  
Photochemical Reaction ◽  
Substrate Surface ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Molecular gating, a methodology that can alter charge carrier concentrations, is exploited to control a chemical reaction on graphene surfaces.

An efficient surface modification using 2-methacryloyloxyethyl phosphorylcholine to control cell attachment via photochemical reaction in a microchannel

Lab on a Chip ◽  
2010 ◽  
Vol 10 (15) ◽  
pp. 1937 ◽  
Author(s):  
Kihoon Jang ◽  
Kae Sato ◽  
Yo Tanaka ◽  
Yan Xu ◽  
Moritoshi Sato ◽  
...  
Keyword(s):  
Surface Modification ◽  
Photochemical Reaction ◽  
Cell Attachment ◽  
Control Cell

scholarly journals Calcium Carbonate as Functional Filler in Polyamide 12-Manipulation of the Thermal and Mechanical Properties

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 937
Author(s):  
Fabio Ippolito ◽  
Gunter Hübner ◽  
Tim Claypole ◽  
Patrick Gane
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Thermal Properties ◽  
Calcium Carbonate ◽  
Selective Laser Sintering ◽  
Thermal Response ◽  
Size Ratio ◽  
Polymeric Compound ◽  
Polyamide 12 ◽  
Twin Screw

Adjusting the thermal response properties of a polymeric compound can significantly improve the usability in a selective laser-sintering process. As previously shown, combining a precise amount of coarse and narrow size distribution fine calcium carbonate fillers results in a potential optimization of the thermal properties of a polyamide 12 matrix. Additionally, up to 60% of the normally associated lost ductility can be re-gained by surface modification, thus functionalizing the filler. To optimize the functionality further this study combines a precisely defined particle size ratio of fillers adopting a specially selected surface modification using amino hexanoic acid. Morphology of the carbonate filler was also investigated. The range of effect of each parameter on the thermal response and mechanical properties was studied. The results show that the thermal properties have large potential to be optimized, without reducing the ductility significantly, by adjusting the morphology and size ratio of coarse and fine filler particles. The compound properties were demonstrated using a twin-screw extruder, indicating the potential for producing a preparate composite for additive manufacturing.

scholarly journals Influence of the Surface Modification of Calcium Carbonate on Polyamide 12 Composites

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1295
Author(s):  
Fabio Ippolito ◽  
Gunter Hübner ◽  
Tim Claypole ◽  
Patrick Gane
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Calcium Carbonate ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Hexanoic Acid ◽  
Mineral Filler ◽  
Polyamide 12 ◽  
Twin Screw ◽  
Surface Modified

In previous investigations, it was found that the thermal properties of a polyamide 12 compound can be manipulated, using a designed filler, to improve the melting as well as crystallization behavior, determined for selective laser sintering. A common downside of the introduction of a non-flexing mineral filler is the reduction of the mechanical properties, such as ductility. This paper investigates the influence of content and surface modification of limestone on the mechanical properties. The aim is to understand the effect of an optimized coupling agent on the properties of a compound, containing polyamide 12 filled with 10 wt % of surface modified calcium carbonate. A range of four mineral filler modifications was chosen to investigate their coupling effect, namely 6-amino hexanoic acid, ε-caprolactam, l-arginine or glutamic acid. The in advance surface modified fillers were then each used in combination with the polyamide 12 in a twin-screw extrusion process. With an optimized surface modifying agent, the tensile strength as well as elongation at break can be improved in comparison with uncoated filler implementation, such that up to 60% of the loss of ductility and toughness of a final part when using an untreated filler could be regained using an optimized surface modifier at a correct amount. With the tested filler grade and the specific tested filler amount, the optimized amount of 6-amino hexanoic acid was approx. 2.5 mmol of treatment agent per 100 m2 of CaCO3. These found improvements in a twin-screw extruded polyamide 12 compound show the possible usage of modified calcium carbonate as a functional filler in additive manufacturing and can potentially be transferred in a subsequent investigation in the selective laser sintering process.

Thermoplastic composites of polyamide-12 reinforced by cellulose nanofibers with cationic surface modification

2014 ◽  
Vol 131 (20) ◽  
pp. n/a-n/a ◽  
Author(s):  
Takeshi Semba ◽  
Akihiro Ito ◽  
Kazuo Kitagawa ◽  
Takeshi Nakatani ◽  
Hiroyuki Yano ◽  
...  
Keyword(s):  
Surface Modification ◽  
Cellulose Nanofibers ◽  
Thermoplastic Composites ◽  
Polyamide 12

A remote photochemical reaction for surface modification of polymeric substrate

2012 ◽  
Vol 50 (18) ◽  
pp. 3698-3702 ◽  
Author(s):  
Changwen Zhao ◽  
Zhengdong Zhang ◽  
Wantai Yang
Keyword(s):  
Surface Modification ◽  
Photochemical Reaction ◽  
Polymeric Substrate
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