Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Microwave-Assisted Upcycling of Polypropylene to Carbon Nanospheres and Fluorescence Water-Soluble Products
KTH, School of Chemical Science and Engineering (CHE).
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Mikrovågsassisterad 'upcycling' av polypropen till kolnanosfärer och fluorescerade vattenlösliga produkter (Swedish)
Abstract [en]

Polypropylene (PP) is one of the most common plastics due to its stable properties and relatively easy synthesis and processing. However, its non-biodegradable property can cause environmental problems. In this project, an accessible method was explored to convert PP into high value carbon materials without using metal and/or clay as catalyst.

PP does not absorb microwave irradiation due to its non-polar structure . However, with the synergistic effect of acidic aqueous solution and microwave irradiation, PP can be effectively carbonised and/or liquefied under relatively mild conditions .

The carbonized product has amorphous graphitic structure. Under the SEM image, carbon nanospheres were observed. This carbonized product was then reduced under microwave irradiation and its thermal stability was simultaneously significantly improved. This reduced carbonized product can further be applied for increasing the mechanical property of the PMMA film.

The product in aqueous phase cont ained polycyclic aromatic structure with oxygen functional groups. In addition, it  showed some fluorescence properties. Photoluminescence spectra showed that the emission peak red-shift when a higher excitation wavelength was applied. This fluorescent product in aqueous phase could possibly be further applied for sensing or drug delivery.

 

 

 

Place, publisher, year, edition, pages
2017. , 51 p.
Keyword [en]
Microwave, carbonisation, carbonized, reduce, polypropylene, hydrothermal, recycling, carbon dots, C-dots, porous carbon, graphene oxide
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-215293OAI: oai:DiVA.org:kth-215293DiVA: diva2:1147570
Available from: 2017-10-06 Created: 2017-10-06 Last updated: 2017-10-06Bibliographically approved

Open Access in DiVA

No full text

By organisation
School of Chemical Science and Engineering (CHE)
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 25 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf