scholarly journals Bioinspired polymer microstructures for directional transport of oily liquids

2017 ◽  
Vol 4 (3) ◽  
pp. 160849 ◽  
Author(s):  
C. Plamadeala ◽  
F. Hischen ◽  
R. Friesenecker ◽  
R. Wollhofen ◽  
J. Jacak ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Technical Problems ◽  
Oil Transport ◽  
Two Photon ◽  
Liquid Front ◽  
Polymer Microstructures ◽  
Wear Reduction ◽  
The Right ◽  
Directional Transport ◽  
Two Photon Polymerization

Nature has always served as an inspiration for scientists, helping them to solve a large diversity of technical problems. In our case, we are interested in the directional transport of oily liquids and as a model for this application we used the flat bug Dysodius lunatus . In this report, we present arrays of drops looking like polymer microstructures produced by the two-photon polymerization technique that mimic the micro-ornamentation from the bug's cuticle. A good directionality of oil transport was achieved, directly controlled by the direction of the pointed microstructures at the surface. If the tips of the drop-like microstructures are pointing towards the left side, the liquid front moves to the right and vice versa. Similar effects could be expected for the transport of oily lubricants. These results could, therefore, be interesting for applications in friction and wear reduction.

Mechanical Property Enhancement of Nanocomposite Microstructures Generated by Two Photon Polymerization

2010 ◽  
Vol 1 (4) ◽  
Author(s):  
M. Alubaidy ◽  
K. Venkatakrishnan ◽  
B. Tan ◽  
Abdulsalam Mahmood
Keyword(s):  
Mechanical Properties ◽  
Femtosecond Laser ◽  
Volume Fraction ◽  
Laser Material Processing ◽  
Laser Material ◽  
Two Photon ◽  
Reinforced Polymer ◽  
Direct Fabrication ◽  
Polymer Microstructures ◽  
Two Photon Polymerization

The mechanical properties of nanofiber reinforced polymer microstructures were investigated in this work by means of nanoindentation. The femtosecond laser was used to generate nanofibers on selected area on the surface of the substrate and to generate microstructures. These microstructures were formed via two photon polymerization using femtosecond laser material processing by incorporation of silicon nanofibers into Ormocer matrix. Results show that the hardness and elastic modulus of the nanocomposites have improved by 25% and 75%, respectively, with the incorporation of nanofibers using the described method, which has the potential of direct fabrication of reinforced micro-/nanostructures. The volume fraction of the generated nanofibers in the nanocomposite was calculated by using nanoindentation analysis.

Pattern writing in a liquid-crystal-monomer mixture using two-photon polymerization

2013 ◽  
Author(s):  
Chandroth P. Jisha ◽  
Kuei-Chu Hsu ◽  
YuanYao Lin ◽  
Ja-Hon Lin ◽  
Chien-Chung Jeng ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Monomer Mixture ◽  
Two Photon ◽  
Two Photon Polymerization

Two-photon polymerization nanomanufacturing based on the definition-reinforcement-solidification (DRS) strategy

2020 ◽  
pp. 1-1
Author(s):  
Zhi-Yong Hu ◽  
Hang Ren ◽  
Hong Xia ◽  
Zhen-Nan Tian ◽  
Jin-Lei Qi ◽  
...  
Keyword(s):  
Two Photon ◽  
Two Photon Polymerization

Goodbye fouling: A unique coaxial lamination mixer (CLM) enabled by two-photon polymerization for the stable production of monodisperse drug carrier nanoparticles

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Peer Erfle ◽  
Juliane Riewe ◽  
Heike Bunjes ◽  
Andreas Dietzel
Keyword(s):  
Drug Carrier ◽  
Poorly Soluble Drugs ◽  
Microfluidic Systems ◽  
Routes Of Administration ◽  
Two Photon ◽  
Antisolvent Precipitation ◽  
Stable Production ◽  
Poorly Soluble ◽  
Two Photon Polymerization

Poorly soluble drugs can be incorporated in lipid carrier nanoparticles to achieve sufficient bioavailability and open up diverse routes of administration. Preparation by antisolvent precipitation in microfluidic systems enables excellent...

Two-Photon Polymerization Lithography and Laser Doppler Vibrometry of a SU-8-Based Suspended Microchannel Resonator

2015 ◽  
Vol 24 (4) ◽  
pp. 1038-1042 ◽  
Author(s):  
Celso Accoto ◽  
Antonio Qualtieri ◽  
Ferruccio Pisanello ◽  
Carlo Ricciardi ◽  
Candido Fabrizio Pirri ◽  
...  
Keyword(s):  
Laser Doppler ◽  
Laser Doppler Vibrometry ◽  
Two Photon ◽  
Two Photon Polymerization

scholarly journals Investigation of the Tribological Performances of Graphene and WS2 Nanosheets as Additives for Perfluoroalkylpolyethers Under Simulated Space Environment

2021 ◽  
Vol 69 (2) ◽  
Author(s):  
Jia Ren ◽  
Kuiliang Gong ◽  
Gaiqing Zhao ◽  
Wenjing Lou ◽  
Xinhu Wu ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Atomic Oxygen ◽  
Friction And Wear ◽  
Surface Oxidation ◽  
Space Environment ◽  
Composition And Structure ◽  
Before And After ◽  
Wear Reduction ◽  
Ws2 Nanosheets ◽  
Effects Of Irradiation On

AbstractThe tribological performances of perfluoroalkylpolyethers (PFPE) with graphene (Gr), WS2, and the mixture of Gr and WS2 (Gr + WS2) before and after ultraviolet (UV), atomic oxygen (AO), and proton (Pr) irradiations were investigated. The composition and structure of PFPE, Gr, WS2, and Gr + WS2 were also analyzed to understand the effects of irradiation on the tribological behaviors of PFPE with additives. The results indicated that serious deterioration and degradation of PFPE took place and Gr was transformed to amorphous carbon after Pr irradiation, and surface oxidation of WS2 occurred under the irradiations of AO and Pr. Moreover, compared to PFPE and PFPE additized with Gr and WS2, PFPE with the addition of Gr + WS2 exhibited excellent friction and wear reduction before and after UV and AO irradiations. Graphical Abstract

scholarly journals Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 732
Author(s):  
Yeoh Jun Jie Jason ◽  
Heoy Geok How ◽  
Yew Heng Teoh ◽  
Farooq Sher ◽  
Hun Guan Chuah ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Graphene Nanoplatelets ◽  
Friction Reduction ◽  
Engine Oil ◽  
Protective Film ◽  
Tribological Behaviour ◽  
Wear Reduction ◽  
Pongamia Oil ◽  
Interacting Surfaces ◽  
Worn Surface

This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

Design and Fabrication of Double-Layer Curved Compound Eye via Two-Photon Polymerization

2021 ◽  
Vol 33 (5) ◽  
pp. 231-234
Author(s):  
Xian Jing ◽  
Kaixuan Wang ◽  
Rongxin Zhu ◽  
Jieqiong Lin ◽  
Baojun Yu ◽  
...  
Keyword(s):  
Double Layer ◽  
Compound Eye ◽  
Two Photon ◽  
Two Photon Polymerization
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