Få opslag som dette inden alle andre

DTU Studieprojekt - Formulation and test of the antifouling performance of photocatalytic coatings at laboratory scale

Danmarks Tekniske Universitet (DTU)

Opret en karriereprofil og deltag i lodtrækningen om ét gavekort på 2.000 kr til LETZ SUSHI!

Formulation and test of the antifouling performance of photocatalytic coatings at laboratory scale

Udbyder
Vejleder
Sted
København og omegn

  • Background
    Photocatalytic coatings have been investigated for several years as a promising technology able to promote air purification via abatement of organic and inorganic pollutants, as well as creation of surfaces with self-cleaning and antibacterial properties. The photocatalytic functionality is usually provided by nanosized titanium dioxide (TiO2) pigments dispersed in an organic-based film-forming agent [1]. TiO2 is a wide band gap semiconductor active under UV. The exposure of TiO2 to UV irradiation, either from sunlight or artificial light source, generates electron/hole pairs that react with surrounding water and oxygen molecules to yield highly oxidizing compounds (e.g. hydroxyl radical and hydrogen peroxide) [2].

&l Forudsætninger
Relevant BSc degree, with emphasis on physical chemistry and material science. Experience in coatings technology and surface characterization techniques is an advantage.

[5] F. Avelelas, R. Martins, T. Oliveira, F. Maia, E. Malheiro, A.M.V.M. Soares, S. Loureiro, J. Tedim, Efficacy and Ecotoxicity of Novel Anti-Fouling Nanomaterials in Target and Non-Target Mari

[4] D.M. Yebra, S. Kiil, K. Dam-Johansen, Antifouling technology - Past, present and future steps towards efficient and environmentally friendly antifouling coatings, Prog. Org. Coatings. 50 (2004) 75–104. doi:10.1016/j.porgcoat.2003.06.001.

[3] R. Ciriminna, F. V. Bright, M. Pagliaro, Ecofriendly antifouling marine coatings, ACS Sustain. Chem. Eng. 3 (2015) 559–565. doi:10.1021/sc500845n.

[2] V. Binas, D. Venieri, D. Kotzias, G. Kiriakidis, Modified TiO2 based photocatalysts for improved air and health quality, J. Mater. 3 (2017) 3–16. doi:10.1016/j.jmat.2016.11.002.

References
[1] N.S. Allen, M. Edge, J. Verran, J. Stratton, J. Maltby, C. Bygott, Photocatalytic titania based surfaces: Environmental benefits, Polym. Degrad. Stab. 93 (2008) 1632–1646. doi:10.1016/j.polymdegradstab.2008.04.015.

· Based on the obtained results, further modification of the formulation may be necessary to improve the antifouling functionality.

· Structural characterization of the tested coatings to evaluate the potential changes occurring as result of the incorporation of the photocatalytic component and the irradiation.

· Formulation of antifouling coatings containing commercial photocatalyst and evaluation of the activity using the novel setups, including test of non-photocatalytic coatings as reference.

· Fabrication/assembly of the experimental setups.

· Brainstorming of experimental setups that could be potentially used in the investigation, including strategies to monitor the functionality of the coatings (e.g. release of biocide agents). The setups could be based on current equipment available at CoaST laboratories or specifically design for this study.

· Literature study (~1 month) to establish past and current efforts in this area, as well as to get insight into the concepts of coatings, photocatalytic coatings and antifouling coatings.

Project structure
This work will take place within the framework of the CoaST research center and conceive the following steps as tentative plan:

Aim of the project
The main purpose of this project is the formulation and evaluation at laboratory scale of the potential antifouling properties of photocatalytic coatings, in order to predict their performance under real operation. To this end, the student will produce coatings containing photocatalytic pigments and perform experiments where the coatings will be subjected to artificial illumination, with the production of photo-generated biocide agents being monitored. The experimental setup will approach the configuration adopted by the coatings during sailing (i.e. exposure to seawater and water movement), but quasi-static conditions could be also investigated to simulate idle periods. On the other hand, strategies for the formulation of antifouling photocatalytic coatings will be addressed, starting with the modification of standard antifouling formulations with commercial photocatalytic pigments. Preparation of coatings containing pre-treated pigments or even novel synthesized photocatalysts is also conceived for further testing using the implemented experimental setups

In contrast, photocatalytic coatings are conceived as a more efficient and sustainable alternative to traditional biocide-based antifouling coatings [6]. The photocatalytic reactions can potentially trigger the degradation of the binder, even during idle conditions, and ensure the exposure of photocatalytic pigments. The highly oxidizing species produced by the photocatalyst create an unfavorable region around the hull for fouling proliferation. Moreover, as the photo-generated compounds have typically a very short lifetime, they will be rapidly consumed upon creation, leading to negligible bioaccumulation.

Fouling is defined as the accumulation of microorganisms, algae and invertebrates on vessels and other artificial surfaces immersed in water [3]. Fouling proliferation on the hull of ships causes multiple complications, namely higher frictional resistance, affecting the navigation and increasing fuel consumption, leading to more frequent dry-docking maintenance operations. State-of-the-art antifouling paints make use of self-polishing copolymer binders in combination with biocide agents (e.g. Cu2O pigments, Zn/Cu-pyrithione) that are released upon sailing [4]. However, the antifouling property of these coatings is hindered during idle periods due to the immobility of the vessel. In addition, mass release of biocide agents can have a negative impact on the aquatic environment, as they can also interact with non-target organisms [5].

Emneord
  • Bioteknologi og biokemi
  • Fysik
  • Informationsteknologi
  • Kemi
  • Matematik
  • Transport og logistik
  • Teknisk kemi
  • Sundhed og sygdomme
Kontakt
Virksomhed/organisation
DTU Kemiteknik

Navn
Amado Andrés Velázquez-Palenzuela

Stilling
Forsker

Mail
aavp@kt.dtu.dk

Vejleder-info
Kandidatuddannelsen i Kemisk og Biokemisk Teknologi
Vejleder
Amado Andrés Velázquez-Palenzuela

Medvejledere
Jakob Munkholt Christensen, Kim Dam-Johansen, Sara Golbarg

ECTS-point
25 - 35

Type
Kandidatspeciale

Opslaget er indhentet automatisk fra virksomhedens jobsider og vises derfor kun som uddrag. Log ind for at se det fulde opslag eller gå videre til opslaget her:

læs opslaget hos Danmarks Tekniske Universitet (DTU)



gem
husk frist
print
send til mig
Ansøgningsfrist: snarest muligt
Geografiske områder

Jobsøgerinteresse

Hvor meget interesse vækker opslaget hos de jobsøgende? Log ind og se, hvor populært opslaget er.



Angiv venligst i din ansøgning, at du har set opslaget i StuderendeOnline

Ansøg
Opslagstype
Ph.d. & forskning
Studieprojekt/speciale
Geografi
Storkøbenhavn
Uddannelse
Fødevarer & Veterinær
Kemi, Biotek & Materialer
Klima, Miljø & Energi
Maskin & Design
Matematik, Fysik & Nano
Naturvidenskab
Produktion, Logistik & Transport
Teknik & Teknologi
Arbejdsområde
Forskning & Udvikling
Naturvidenskab
Teknik
Få opslag som dette inden alle andre

Danmarks Tekniske Universitet (DTU) - hurtigt overblik


Danmarks Tekniske Universitet (DTU)
Danmarks Tekniske Universitet (DTU)
DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 11.200 studerende uddanner sig her til fremtiden, og 6.000 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

Placering
Anker Engelunds Vej 1
2800 Kgs. Lyngby
Logo: Danmarks Tekniske Universitet (DTU)
Efterspørgsel efter nye talenter

Hvilke jobtyper og arbejdsområder udbyder vi normalt og hvor mange nye talenter søger vi efter?


LinkedIn

Følg vores aktiviteter på LinkedIn.


Webside

Få mere info omkring vores virksomhed på vores egne websider:

www.dtu.dk


Danmarks Tekniske Universitet (DTU) i Google

Er der andre informationer om os, som du burde vide? Se, hvad en Google-søgning siger.




https://studerendeonline.dk/job/1692479//
Karriereprofil i Jobbanken
Opret karriereprofil: Automatiser din jobsøgning med jobagenter, få adgang til nyeste job før andre og bliv synlig for arbejdsgivere med en talentprofil.
nej tak, tag mig til jobopslaget
nej tak, vis ansøgningsinfo
KONKURRENCE
HPT