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Regioselective cationization of cellulosic materials using an efficient solvent-minimizing spray-technique

Hanna de la Motte (Institutionen för kemi- och bioteknik, Organisk kemi) ; Gunnar Westman (Institutionen för kemi- och bioteknik, Organisk kemi)
Cellulose (0969-0239). Vol. 19 (2012), 5, p. 1677-1688.
[Artikel, refereegranskad vetenskaplig]

Cationization of different cellulosic materials was successfully accomplished using an efficient solvent-minimizing spray-technique. The obtained materials were studied and evaluated in regard to reaction efficiency and regioselectivity using 1D and H-1-C-13 correlated 2D NMR experiments. The high consistencies and temperatures applied using the spray-technique resulted in reagent effective etherifications and shorter reaction times. The NMR spectra indicated that the spray-technique favors substitutions at position O-6, showing a regioselectivity of O-6 > O-2 > O-3 for softwood kraft pulp (SKP) and cotton linters. However, cationization of mercerized cellulose and dissolving pulp, using the spray-technique, demonstrated more efficient reactions compared to SKP and cotton, and a regioselectivity of O-6 a parts per thousand yen O-2 > O-3. Nanocrystalline cellulose showed the lowest reactivity and a regioselectivity of O-6 a parts per thousand << O-2 > O-3. In this work we provide information on structure-property relationships and characterization methods for modified polysaccharides, together with a solvent system that is well known industrially and in line with sustainability aspects.

Nyckelord: Cationization, Softwood kraft pulp, Nanocrystalline cellulose, Dissolving pulp, Regioselectivity, NMR, chitosan, etherification, biomaterials, derivatives, strength, behavior, chloride, starch, fiber

Denna post skapades 2012-10-04. Senast ändrad 2016-02-01.
CPL Pubid: 164335


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Organisk kemi (2006-2014)


Pappers-, massa- och fiberteknik

Chalmers infrastruktur