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Related Experiment Videos

Cellulose: its regeneration in the native lattice.

R H Atalla, S C Nagel

    Science (New York, N.Y.)
    |August 9, 1974
    PubMed
    Summary

    Regenerated cellulose from phosphoric acid solutions reformed into its original native cellulose I structure. This structural identification was confirmed using X-ray diffractogram and Raman spectroscopy analysis.

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    Area of Science:

    • Materials Science
    • Polymer Chemistry
    • Biochemistry

    Background:

    • Cellulose regeneration is crucial for creating new materials.
    • Understanding the crystalline structure of regenerated cellulose is key to its properties.
    • Previous methods have yielded different cellulose polymorphs.

    Purpose of the Study:

    • To investigate the crystalline structure of cellulose regenerated from 85% phosphoric acid.
    • To determine if the regeneration process preserves the native cellulose I lattice.
    • To compare the regenerated cellulose structure with other known cellulose polymorphs.

    Main Methods:

    • Dissolving cellulose in 85% phosphoric acid.
    • Regenerating cellulose by immersion in glycerol at 170°C.
    • Analyzing the crystal structure using X-ray diffractogram and Raman spectroscopy.

    Main Results:

    • Cellulose was successfully regenerated from phosphoric acid solution.
    • The regenerated cellulose exclusively formed the native cellulose I lattice.
    • X-ray and Raman spectra matched those of native cellulose I, differing from cellulose II and IV.

    Conclusions:

    • Regeneration of cellulose in 85% phosphoric acid followed by glycerol treatment at 170°C yields cellulose I.
    • This method effectively preserves the native cellulose structure.
    • The findings provide insights into controlling cellulose polymorph formation.

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