Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Surface treatment of cellulose ethers Ytmodifiering av cellulosaetrar
Högskolan i Borås, Institutionen Ingenjörshögskolan.
2014 (Engelska)Självständigt arbete på grundnivå (kandidatexamen)Studentuppsats (Examensarbete)
Abstract [en]

The aim of this diploma work was to execute surface treatment of non-ionic cellulose ethers EHEC that AkzoNobel provides under the tradename Bermocoll®. In order for the cellulose ether to dissolve without forming lumps, some surface treatment is commonly required. In this work glyoxal has been used for this surface modification using two different lab-scale methods that in different ways mimic the full scale production. It is an everlasting challenge for the chemical industry to reduce the consumption of chemicals and also reduce energy consumption in the production. Therefore one objective of this work was to gain fundamental understanding about the glyoxal reaction with EHEC in terms of required equivalents glyoxal, reaction temperature and reaction time. Another aim of this work was to compare the two lab scale methods with regards to their predictivity and reproducibility of results. One method is called the dry method in which a water solution of glyoxal was added to dry, non-glyoxal treated EHEC at varying temperature during heavy agitation. The second method is called the acetone method where the EHEC and glyoxal were first suspended in acetone at room temperature, and then heated at different temperature for various time periods. The parameters in the experiments made was chosen using a design of experiments (DoE) approach in order to gain as much information as possible from a few experiments and also facilitating a statistical analysis of the results. This diploma work indicates that the acetone method have a better reproducibility and would be the better choice when investigating various parameters for the reaction. On the other hand the dry method might be better suited for the further analysis of temperature dependence of the glyoxal reaction with cellulose ethers. The most important factor for the reaction was the amount of glyoxal used, whereas it is indicated that the reaction temperature had a minor effect on the reaction yields.

Ort, förlag, år, upplaga, sidor
University of Borås/School of Engineering , 2014.
Serie
Kandidatuppsats
Nyckelord [en]
Cellulose ether, cellulose, Bermocoll, glyoxal, surface treatment with glyoxal, EHEC
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:hb:diva-17977Lokalt ID: 2320/13974OAI: oai:DiVA.org:hb-17977DiVA, id: diva2:1309890
Anmärkning
Program: Högskoleingenjörsexamen i Kemiingenjör – tillämpad bioteknikTillgänglig från: 2019-04-30 Skapad: 2019-04-30

Open Access i DiVA

fulltext(1578 kB)48 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 1578 kBChecksumma SHA-512
96cba742dcb08ca80d1f41d68265f86ce29af9dc13d1e927b9cd1a75433f91b80e323979adf567a0fcc4ef9070d266a5de1dc5d20d939e699c65600acd858539
Typ fulltextMimetyp application/pdf

Av organisationen
Institutionen Ingenjörshögskolan
Teknik och teknologier

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 48 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 41 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf