Oligomeric Cellulose Co-Crystallization with DMSO

POSTER

Abstract

Oligomeric cellulose with a median degree of polymerization of 7 (DP7) is produced by hydrolysis of cellulose in phosphoric acid. DP7 molecular weight distribution was characterized by NMR, MALDI-TOF, and GPC. DP7 is soluble in hot DMSO and crystallizes in the form of spherulites upon cooling. The spherulite morphologies and crystallization kinetics was characterized by polarized optical microscopy. The structure of the crystal has been studied by synchrotron radiation XRD, TEM and MD simulation. The oligomeric cellulose and DMSO co-crystallize. After removing excessive solvent, the crystal is metastable in dry air but transforms into the cellulose II crystal structure when exposed to humidity.

Presenters

  • Xin Zhang

    University of Maryland, College Park

Authors

  • Xin Zhang

    University of Maryland, College Park

  • Feng Jiang

    University of Maryland, College Park

  • Yimin Mao

    University of Maryland, College Park

  • Doug Henderson

    University of Maryland, College Park

  • Yoshiharu Nishiyama

    CERMAV, CNRS, Grenoble, Isère, France

  • Robert M Briber

    University of Maryland, College Park

  • Howard Wang

    University of Maryland College Park, University of Maryland, College Park