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Erschienen in: Cellulose 7/2021

06.03.2021 | Original Research

Linear and branched structures present in high-molar-mass fractions in holocelluloses prepared from chara, haircap moss, adiantum, ginkgo, Japanese cedar, and eucalyptus

verfasst von: Yuko Ono, Yasutaka Nakamura, Yaxin Zhou, Yoshiki Horikawa, Akira Isogai

Erschienen in: Cellulose | Ausgabe 7/2021

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Abstract

The land plants evolved from a salt-water algal ancestor, diversifying on land into fresh-water algae, mosses, ferns, gymnosperms, and finally the angiosperms that dominate land today. In this study, the structures of high-molar-mass fractions in holocelluloses prepared from chara (a freshwater alga), haircap moss, adiantum, ginkgo, Japanese cedar, and eucalyptus were investigated using size-exclusion chromatography with multi-angle laser-light scattering, ultraviolet, and refractive index detection (SEC/MALLS/UV/RI). 4% NaOH-extracted holocelluloses prepared from the above algal and land plants were dissolved in 8% (w/w) lithium chloride/N,N-dimethylacetamide and subjected to SEC/MALLS/UV/RI analysis. The neutral sugar compositions of the samples were also measured. The holocelluloses prepared from chara, haircap moss, and adiantum had the same crystalline microfibril structures (~ 3 nm in width) as those prepared from ginkgo, Japanese cedar, and eucalyptus. However, SEC/MALLS/UV/RI analysis gave different results among samples. Haircap moss, adiantum, Japanese cedar, and ginkgo had cellulose/glucomannan branched structures linked through degraded fragments of residual lignin or lignin-like phenolic compounds. In contrast, 4% NaOH-extracted chara holocellulose had no such branched structures, but contained the same linear structure as found in eucalyptus. The results obtained in this study, therefore, showed the possibility that land plant cellulose fibers, have branched structures with glucomannan in the HMM fractions, even though the cellulose fibers are prepared by repeated delignification and successive 4% NaOH extraction.

Graphic abstract

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Metadaten
Titel
Linear and branched structures present in high-molar-mass fractions in holocelluloses prepared from chara, haircap moss, adiantum, ginkgo, Japanese cedar, and eucalyptus
verfasst von
Yuko Ono
Yasutaka Nakamura
Yaxin Zhou
Yoshiki Horikawa
Akira Isogai
Publikationsdatum
06.03.2021
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 7/2021
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-03792-z

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