Abstract
Triblock cooligomers consisting of tri-O-methyl-glucopyranosyl and unmodified glucopyranosyl residues, methyl 2,3,4,6-tetra-O-methyl-β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-β-d-glucopyranosyl-(1 → 4)-β-d-glucopyranosyl-(1 → 4)-β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-α-d-glucopyranoside (1: ABA triblock cooligomer; DS = 2.1) and β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-β-d-glucopyranosyl-(1 → 4)-2,3,6-tri-O-methyl-β-d-glucopyranosyl-(1 → 4)-d-glucopyranose (2: BAB triblock cooligomer; DS = 1.8) were prepared. Compound 1 dissolved both in distilled water and chloroform but compound 2 dissolved in distilled water not in chloroform, though compounds 1 and 2 consist of 4 tri-O-methyl-glucopyranosyl and 2 unmodified anhydro glucopyranosyl units.
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References
Hartmann RG, Deshmukh BK, Conklin J, Torowski M, Lynch S (2007) Determination of methylcellulose and hydroxypropyl methylcellulose food gums in food products: collaborative study. J AOAC Int 90(3):786–793
Kamitakahara H, Nakatsubo F, Murakami K (1994) Ring-opening polymerization of 1, 4-anhydro-α-d-glucopyranose derivatives having acyl-groups and synthesis of (1 → 5)-β-d-glucofuranan. Macromolecules 27(21):5937–5942
Kamitakahara H, Nakatsubo F, Klemm D (2006) Block co-oligomers of tri-O-methylated and unmodified cello-oligosaccharides as model compounds for methylcellulose and its dissolution/gelation behavior. Cellulose 13(4):375–392
Kamitakahara H, Nakatsubo F, Klemm D (2007) New class of carbohydrate-based nonionic surfactants: diblock co-oligomers of tri-O-methylated and unmodified cello-oligosaccharides. Cellulose 14(5):513–528
Kamitakahara H, Yoshinaga A, Aono H, Nakatsubo F, Klemm D, Burchard W (2008) New approach to unravel the structure-property relationship of methylcellulose. Self-assembly of amphiphilic block-like methylated cello-oligosaccharides. Cellulose 15(6):797–801
Klemm D, Heublein B, Fink HP, Bohn A (2005) Cellulose: fascinating biopolymer and sustainable raw material. Angew Chem Int Ed 44(22):3358–3393
Nishinari K, Takahashi R (2003) Interaction in polysaccharide solutions and gels. Curr Opin Colloid Interface Sci 8(4):396–400
Savage AB (1957) Temperature-viscosity relationships for water-soluble cellulose ethers. Ind Eng Chem 49:99
Acknowledgments
The authors are indebted to Prof. Dr. D. Klemm for helpful discussions and his encouragement. The investigation was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, and Culture of Japan (No. 18680009).
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Kamitakahara, H., Nakatsubo, F. ABA- and BAB-triblock cooligomers of tri-O-methylated and unmodified cello-oligosaccharides: syntheses and structure-solubility relationship. Cellulose 17, 173–186 (2010). https://doi.org/10.1007/s10570-009-9348-3
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DOI: https://doi.org/10.1007/s10570-009-9348-3