+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Aggregation of cellulose in lithium chloride/N,N-dimethylacetamide

Aggregation of cellulose in lithium chloride/N,N-dimethylacetamide

Carbohydrate Polymers 41(2): 153-161

Hardwood kraft pulps can be completely dissolved in lithium chloride/N,N-dimethylacetamide (LiCl/DMAc). The cellulose and hemi-cellulose components can be separated by size exclusion chromatography (SEC). The molecular weight distribution that corresponds to cellulose is extended up to the high molecular weight region and the weight average molecular weight (Mw) relative to pullulan of this distribution is high. Light scattering (LS) measurements were conducted on a cotton linters sample of a similar elution volume as the cellulose portion of the pulp. The true Mw of the cotton linters sample measured by LS was in close agreement with the Mw determined relative to pullulan using SEC. Gaussian curve fitting revealed an additional high molecular weight component, not apparent in the chromatogram of hardwood pulp. Based on this finding the high Mw is suggested to be due to aggregation of cellulose in LiCl/DMAc. The influence of dissolution conditions is discussed and a method for deaggregating the cellulose portion of dissolved hardwood pulps is proposed.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 010139293

Download citation: RISBibTeXText

DOI: 10.1016/s0144-8617(99)00080-6

Related references

Competitive formation of azetidinium pyrrolidinium and aziridinium ions during the fluorination of certain di o mesylated dimethylaminopentofuranosides. Tetrahedron 48(29): 6033-6042, 1992

Conformation and concerted dynamics of the integrin-binding site and the C-terminal region of echistatin revealed by homonuclear NMR. Biochemical Journal 387(Pt 1): 57-66, 2005

Size exclusion chromatography. Analytical Chemistry. 66(12): 595r-620r, 1994

Dissolution mechanism of calcium apatites in acids: A review of literature. World Journal of Methodology 2(1): 1-17, 2012

Chlorinated residues in the adipose tissue of pigs treated with gamma-hexachlorocyclohexane. Journal of the Science of Food and Agriculture 34(4): 378-387, 1983

Preferential interaction of Na+ over K+ with carboxylate-functionalized silver nanoparticles. Science of the Total Environment 490: 11-18, 2014

Size-exclusion chromatographic study of the reduction of recombinant hepatitis B surface antigen. Journal of Chromatography B 713(2): 401-407, 1998

Homogeneous epithelial gammadelta T cell repertoire of the skin is shaped through peripheral selection. Journal of Dermatological Science 25(2): 150-155, 2001

Study of the stability of an oil blanched with activated earth with cation exchange. 1970

Hydrolytic polyketide shortening by ayg1p, a novel enzyme involved in fungal melanin biosynthesis. Journal of Biological Chemistry 279(43): 44613-44620, 2004

Influence of the subtending leaf on the growth of axillary bud and formation of banji bud in tea. Indian Journal of Plant Physiology 10(3): 267-272, 2005

Dissolution kinetics of guar gum powders-III. Effect of particle size. Carbohydrate polymers11 64(2): 239-246, 2006