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Replacing benzyl chloride with a lignin-degradation product in cellulose etherification decreases the melting point
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.ORCID-id: 0000-0002-1705-5249
2023 (Engelska)Ingår i: BioResources, E-ISSN 1930-2126, Vol. 18, nr 1, s. 161-174Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A cellulose ether that is easier to melt than benzyl cellulose was produced from the lignin degradation product veratryl alcohol. Veratryl chloride and bromide were synthesized from the alcohol, and these two chemicals were used to react with Avicel® cellulose to form the novel cellulose ether veratryl cellulose (VC). Spectroscopic characterisation techniques (1H NMR, FTIR) indicated the successful conversion of Avicel® cellulose to the cellulose ether VC, by both routes, at a degree of substitution of 1.4 to 1.6. Melting measurements of the VC samples showed a gradual softening from approximately 110 °C; the VC was melted below 200 °C. XRD analysis confirmed that the chemical treatments affect the degree of crystallinity. Size exclusion chromatography results showed that the products differ remarkably in molecular weight. The VC synthesized with veratryl chloride degraded almost twice as much as when veratryl bromide were used. The cellulose ethers were soluble in DMSO, DMAc, and CHCl3.

Ort, förlag, år, upplaga, sidor
North Carolina State University , 2023. Vol. 18, nr 1, s. 161-174
Nyckelord [en]
Cellulose ether, Characterisation techniques, Degree of substitution, Melting measurements, Size exclusion chromatography, Veratryl cellulose
Nationell ämneskategori
Organisk kemi
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URN: urn:nbn:se:umu:diva-205016DOI: 10.15376/biores.18.1.161-174ISI: 000884908100011Scopus ID: 2-s2.0-85147794860OAI: oai:DiVA.org:umu-205016DiVA, id: diva2:1738487
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KempestiftelsernaBio4EnergyTillgänglig från: 2023-02-22 Skapad: 2023-02-22 Senast uppdaterad: 2024-08-23Bibliografiskt granskad

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Yahia, MohamedSundman, Ola

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