ARGAZKI ZIENTIFIKOEN LEHIAKETA 2021


Nork parte hartu  dezake?


• POLYMATeko Doktoradutza ikasleak
• Aurreko edizioen irabazleak ezin dute parte hartu.
• Jasotzeko epea: 2021ko Urtarrilaren 31a.
• Dokumentuak e-mailez bidali behar dira helbide honetara: polymat@ehu.eus


Igorri beharreko informazioa


Word txantiloia erabili ondorengo informazioa gehituaz:

• (Material polimeriko baten argazki bat, erabilitako teknika zehazki deskribatuaz (SEM, TEM, ...) eta eskala garbi adieraziz. Gainera laginaren prestaketaren azalpen zehatza gehitu behar da).

• Tesi proiektuaren laburpena (gehienez 200 hitz).
• Argazkiaren izena eta deskribapena tesiaren kontestuan edo ikerketa egin den proiektuaren kontestuan.
• Tesiaren zuzendaria (k).
• Dokumentu osoaren papereko bertsioa.


Ebaluazio-irizpideak

  • Tesiaren edo proiektuarekin duen erlazioa eta irudiaren interpretazioa eta argazkia lortzeko laginaren prestaketaren xehetasunak (%25)
  • Irudiaren estetika (%25)
  • Irudiaren kalitatea (%25)
  • Argazkia lortzeko zailtasuna (%25)

Lehenengo bi irizpideak POLYMAT institutuko kontseiluak ebaluatuko ditu, eta hirugarrena eta laugarrena Unibertsitateko AFM eta TEM Zerbitzu Orokorretako (SGIker) Dolores Martin eta Ana Martínez doktoreak ebaluatuko dituzte.


Saria


• Tesi zuzendariaren arabera aukeratutako nazionarteko kongresu baterako izen ematea, bidaia-gastuak eta ostatua barne,1.500 €-ko maximoarekin.

 

2020 Photography contest winner

Honeycomb-like microstructured materials for mechanically strong polymer films. Author: Ms. Nerea Jiménez

TEM micrograph of a cross-section of an acrylic polymer film for coatings applications. In the image, the darkest component forms a honeycomb microstructure around the lightest phase. The dark phase was composed of tannic acid, a naturally occurring polyphenol, and the light phase was consisting of poly(N-vinyl pyrrolidone-co-butyl acrylate-co-methyl methacrylate) (P(NVP/BA/MMA) polymer particles produced by seeded semibatch emulsion polymerization. For the preparation of the sample, 5% based on polymer of tannic acid was added as an aqueous solution to the P(NVP/BA/MMA) polymer dispersion. The blend was stirred for 30 minutes, cast into a silicone mould and dried for 7 days at 55 % relative humidity and 25 ºC. The resulting polymer film was cut employing a microtome and stained with ruthenium tetraoxide (RuO4) in order to increase the contrast of the aromatic rings of tannic acid. The staining process allowed the observation of the honeycomb microstructure formed by tannic acid around the polymer particles. The honeycomb microstructure was formed as a result of the strong hydrogen bonds between the aromatic hydroxyl groups of tannic acid and the amide groups of the pyrrolidones present in the polymer, which promoted the homogeneous distribution of tannic acid around the polymer particles. This conclusion was made by comparing the microstructure of the materials prepared without the pyrrolidone: The tannic acid formed aggregates instead of the continuous honeycomb microstructure. The P(NVP/BA/MMA)/tannic acid hydrogen bonded materials presented greater Young’s modulus and yield stress as a result of the hard honeycomb structure. The high stiffness presented by these materials make them excellent candidates for applications that require hard polymer films and opens the way for the complete replacement of solventborne coatings.

2019 Photography contest winner

Tittle:
Description: AFM phase image of a double crystalline PE494.9-b-PEO515.2 diblock copolymer. The long edge on lamellae in the center of the image correspond to the polyethylene block crystals. To the top and the bottom of the image, flat on lamellae can be observed, which can correspond to both PE and PEO block crystals. The thin vertical short lamellae on the middle of the image (looking like fish bones) are most probably poly(ethylene oxide) lamellae. Author: Ms. Eider Matxinandiarena

2018 Photography contest winner

Centipede
2018 Awarded picture: "Centipede" by Mr. Jesus Alvaro Iregui. Description: AFM phase image of an electrospun PCL-DGEBA nanofiber. Due to the spinning process, it is observed a high degree of crystalline orientation

Laugarren Argazki Zientifikoko Lehiaketa

AFM phase image of the top surface of a dried film of latex with particles polymerized in presence of cellulose nanocrystals. Elodie Limousin

Hirugarren Argazki Zientifikoko Lehiaketa

"The eyes": Double crystalline nascent spherulite. AFM micrographs of a PEO-b-PCL diblock copolymer taken at a room temperature. Jordana Palacios.

Bigarren Argazki Zientifikoko Lehiaketa

Foto ganadora:
Argazki irabazlea: Ana Belén López, "SEM micrograph showing multiscale roughness". Ana Belén López

 

 

Bigarren  Argazki Zientifikoko Lehiaketaren argazkiak. Pdf bertsioa

 

 

Lehenengo Argazki Zientifikoko Lehiaketa

Awarded Picture
Argazki irabazlea: Ana Belén López, "SEM micrograph of a dispersion of fluorinated polymer particles"

 

1go Argazki Zientifikoko Lehiaketaren argazkiak. Pdf bertsioa