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On the importance of variation of alkalisation conditions on cellulose ether synthesis
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- Forsberg, Diana Carolina Reyes (author)
- MoRe Research AB, Örnsköldsvik, Sweden
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- Sundman, Ola (author)
- Umeå universitet,Kemiska institutionen
- (creator_code:org_t)
- Publishing House of the Romanian Academy, 2022
- 2022
- English.
- In: Cellulose Chemistry and Technology. - : Publishing House of the Romanian Academy. - 0576-9787. ; 56:3-4, s. 227-238
- Journal article (peer-reviewed)
Abstract
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- With a multivariate approach, we investigate and correlate the effect of mercerization conditions on the properties of a cellulose ether. We have chosen to work with carboxymethylcellulose (CMC) for analytical reasons. As expected, the DS was found to increase when the NaOH/AGU (anhydroglucose unit) stoichiometric ratio (r) was increased (range 1.0–1.3) and [NaOH] was decreased (range 50-30%). However, such changes also favoured the formation of unwanted side products. Decreased (r) and increased [NaOH] resulted in increased heterogeneity, and thus the quantities of insoluble particles and unreacted chemicals also increased. As another result, the prediction between mercerisation and synthesis weakens. Consequently, a DS of 0.18–0.7 was obtained; the measured solubility was much lower than expected. A non-statistical distribution of substituents was further found. Interestingly, the relative importance of substitution at increases with an increased [NaOH].
Subject headings
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Keyword
- alkalisation
- carboxymethylcellulose
- cellulose ethers
- mercerization
- sodium diglycolate
- sodium glycolate
Publication and Content Type
- ref (subject category)
- art (subject category)
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