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
Rigid gluten foams formed at ambient conditons
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
Starka glutenskummaterial tillverkade vid normalt tryck och temperatur (Swedish)
Abstract [en]

A new method based on mechanical foaming to produce renewable foam materials based on gluten, i.e. without using freeze-drying, using high shear mixing and stabilizing the foam using glutaraldehyde is presented. An optimization of the amount of glutaraldehyde is shown and then three ways to tailor the mechanical properties of the foams are evaluated, including increasing the gluten content in the system, adding TEMPO-oxidised cellulose as reinforcement or adding glycerol for plasticization. One system using both the TEMPO cellulose and glycerol combined was also analyzed. The mechanical properties and morphology of the foams were analyzed with compression tests and scanning electron microscopy (SEM). The results shows that foams can be obtained using the method with an optimal glutaraldehyde concentration of 0.25g/10g gluten, resulting in rigid foams with 50-70% porosity and a pore size of 0.25-0.30 mm. Increasing gluten content or adding TEMPO cellulose results in stronger foams with a higher modulus, while glycerol can be added to increase ductility and strain recovery. Combining TEMPO cellulose with glycerol in the foam resulted in weaker materials than for similar samples with only glycerol.

Abstract [sv]

En ny metod baserad på mekanisk skumning för att producera förnybara skum material baserade på gluten, dvs utan användning av frystorkning, med användning av högskjuvningsblandning och stabilisering skummet med av glutaraldehyd presenteras. En optimering av mängden glutaraldehyd visas och tre sätt att skräddarsy de mekaniska egenskaperna hos skummen utvärderas, inklusive ökning av halten gluten i systemet, tillsättning av TEMPO-oxiderad cellulosa som förstärkning eller tillsats av glycerol under plasticering. Ett system som använder både TEMPO cellulosa och glycerol kombinerat analyserades också. De mekaniska egenskaperna och morfologin hos skummen analyserades med kompressionsprov och svepelektronmikroskopi (SEM). Resultaten visar att skum kan erhållas genom metoden med en optimal glutaraldehydkoncentration på 0,25 g / 10 g gluten, vilket resulterar i styva skum med 50-70% porositet och en porstorlek på 0,25-0,30 mm. Ökande gluteninnehåll eller tillsats av TEMPO-oxiedrad cellulosa resulterar i starkare skum med högre E-modul, medan glycerol kan tillsättas för att öka duktiliteten och stam återhämtning. Kombinering av TEMPO cellulosa med glycerol i skumresulterade i svagare material än för liknande prover med endast glycerol.

Place, publisher, year, edition, pages
2017.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-212552OAI: oai:DiVA.org:kth-212552DiVA: diva2:1135405
Available from: 2017-08-23 Created: 2017-08-23 Last updated: 2018-01-17Bibliographically 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: 90 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