kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Release of micro- and nanoparticles from a polypropylene/claynanocomposite, a methodology for controlled degradation and evaluation
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0001-7944-4103
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0002-2139-7460
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.ORCID iD: 0000-0002-6071-6241
2021 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 319, p. 128761-Article in journal (Refereed) Published
Abstract [en]

A methodology was developed for qualitative assessment and characterisation of particle lossesfrom nanocomposites during service life. The methodology can be generalised to other systemswhere the material fragments during ageing and can be extended to quantitative analysis. Achamber was constructed for ageing of selected materials, which enabled effective collectionand subsequent analysis of released particles. A combination of scanning and transmissionelectron microscopy and energy dispersive X-ray spectroscopy was found to be suitable forcharacterising particles in terms of size, shape and content. The methodology was tested on acommon nanoclay composite with polypropylene as the matrix. There was no need forphysical/mechanical wear to generate particles, slow flow of air and elevated temperature ledto cracking and fragmentation of the material, and subsequent release of nanocompositeparticles containing embedded or protruding clay. The release of pure clay particles andpolypropylene particles was also detected. Using the methodology, it was observed that evenin ‘mild’ degradation conditions (pure thermo-oxidation with no wear), fillers andnanocomposite particles can be released to the environment, which is an environmental andhealth concern.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 319, p. 128761-
Keywords [en]
Microparticles, Microplastics, Release, Nanocomposite, Ageing, Clay
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-301253DOI: 10.1016/j.jclepro.2021.128761ISI: 000704409500002Scopus ID: 2-s2.0-85113398981OAI: oai:DiVA.org:kth-301253DiVA, id: diva2:1591531
Note

QC 20211027

Available from: 2021-09-06 Created: 2021-09-06 Last updated: 2022-06-25Bibliographically approved
In thesis
1. Interactions between polymers and the environment
Open this publication in new window or tab >>Interactions between polymers and the environment
2021 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation addresses the structure and properties of a number of polymer-based materials when they come into contact with specific environments. The first part describes the migration and depletion of active substances from insecticide-impregnated polyethylene sheets in water and air at different humidity levels and higher temperatures. 

  In the second part, the structure, crystallization kinetics, and mechanical and transport properties of multilayer polymer films, consisting of metallocene (mPE) and low-density (LDPE) polyethylene layers, and in some cases also with layers of poly(ethylene-co-vinyl alcohol) and a polyethylene compatibilizer were investigated. Furthermore, inhomogeneous swelling was observed in the 2-layer films containing mPE and LDPE due to differences in the uptake of n-hexane (and limonene) in the respective film layers. These differences caused a bending/curvature of the film upon exposure to the vapour. This effect was further evaluated to determine whether solvent-induced bending could be used as a passive sensor to detect the presence and content of volatile organic compounds in air (VOC). 

  The third part of this thesis describes the possibility of producing biopolymer materials based on larvae from the black soldier fly. After adding a plasticizer to the degreased larval material, protein-based biopolymer films were prepared via compression-moulding. The lipid extracted from the degreasing operation could potentially be used in various applications, such as those involving lubricants. 

  In the last part of this work the release of micro- and nano-particles were determined from a polypropylene nanoclay-composite in a commonly occurring environment for plastics (air at elevated temperature). A prototype exposure chamber was built, and a method was developed to allow aging (degradation) of the sample in this chamber and analyze the effects of aging on the sample.

Abstract [sv]

Denna avhandling behandlar struktur och egenskaper hos ett antal polymerbaserade material i kontakt med vissa specifika miljöer. Den första delen behandlar migration och utarmning av aktiva substanser från insekticid-impregnerade polyetenplattor i vatten och luft vid olika luftfuktigheter och högre temperatur.

I den andra delen studerades strukturen, kristallisationskinetiken samt mekaniska och transportegenskaper hos flerskiktade polymerfilmer uppbyggda av metallocen-polyeten (mPE) och lågdensitetspolyeten (LDPE), och i vissa fall också med skikt av poly(etylen-co-vinylalkohol) och en polyetenkompatibilisator. Vidare observerades en inhomogen svällning i 2-skiktsfilmen med mPE och LDPE, på grund av skillnader i upptag av n-hexan (och limonen) i respektive filmskikt, vilket orsakade en böjning/krökning av filmen vid exponering för ångan. Denna effekt utvärderades ytterligare för att se om den lösningsmedelsinducerade böjningen kunde användas som en passiv sensor för att detektera närvaron och halten av flyktiga organiska föreningar i luft (VOC). 

I den tredje delen av detta arbete visades möjligheten att producera biopolymer-material baserat på larver (Svart soldatfluga). Efter tillsats av en mjukgörare till det avfettade larvmaterialet framställdes protein-baserade biopolymerfilmer genom kompressionsgjutning. Den extraherade lipiden från avfettningen kan potentiallt också användas i olika applikationer, såsom i smörjmedel. 

I den sista delen av detta arbete undersöktes frisättningen av mikro- och nanopartiklar från en nanokomposit av polypropen och nanolera i en vanlig miljö för plast (luft vid förhöjd temperatur). En prototyp-exponeringskammare konstruerades och en metodik utvecklades för att kunna åldra (bryta ned) provet i denna kammare och analysera effekten av åldrandet.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2021. p. 64
Series
TRITA-CBH-FOU ; 35
Keywords
Deltamethrin, piperonyl butoxide, polyethylene, migration, multilayer film, EVOH, n-hexane, crystallization, mechanical properties, X-ray scattering, swelling, larvae, protein, lipid, moisture sorption, release, nanoclay, polypropylene, degradation
National Category
Polymer Technologies
Research subject
Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-301255 (URN)978-91-7873-970-7 (ISBN)
Public defence
2021-09-30, https://kth-se.zoom.us/webinar/register/WN_QLyLOUD-SA-H4j7Gw00qfA, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 2021-09-07

Available from: 2021-09-07 Created: 2021-09-06 Last updated: 2022-06-25Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Alipour, NazaninStrömberg, EmmaHedenqvist, Mikael S.

Search in DiVA

By author/editor
Alipour, NazaninStrömberg, EmmaHedenqvist, Mikael S.
By organisation
Fibre- and Polymer TechnologyPolymeric Materials
In the same journal
Journal of Cleaner Production
Polymer Technologies

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 240 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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