Skip to main content
SpringerLink
Log in

SANS Study of Chirality and Order in Liquid Crystalline Cellulose Suspensions

  • Article
  • Published:
MRS Online Proceedings Library Aims and scope

Abstract

Small angle neutron scattering, SANS, was used to describe the magnetic alignment and in situ shear ordering of polyelectrolytic, liquid crystalline cellulose microfibrils in aqueous (D2O) suspension. In a 2.4 Tesla magnetic field, microfibril suspensions exhibit anisotropic chiral nematic (cholesteric) ordering in which the distance between nematic planes along the cholesteric axis is shorter than between rods within a nematic plane. This is consistent with the hypothesis that cellulose microfibrils are helically twisted rods. During shear, the SANS interference peaks perpendicular to the flow direction sharpen with increasing shear rate. Yet, the highest degree of alignment (for microfibrils with axial ratios of ~45) was observed a short period after the cessation of shear flow.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Certain commercial materials and equipment are identified in this paper in order to specify the experimental procedure. This in no way implies recommendation or endorsement by the National Institute of Standards and Technology.

  2. R.H. Marchessault, F.F. Morehead, and N.M. Walter, Nature 184, 632 (1959).

    Article  CAS  Google Scholar 

  3. J.-F. Revol, H. Bradford, J.H. Giasson, R.H. Marchessault, D.G. Gray, Int. J. Biol. Macromol. 14, 170, (1992).

    Article  CAS  Google Scholar 

  4. J.-F. Revol, L. Godbout, X.-M. Dong, D.G. Gray, H. Chanzy, G. Maret, Liq. Cryst. 16(1), 127, (1994).

    Article  CAS  Google Scholar 

  5. J.F. Revol, and R.H. Marchessault, Int. J. Biol. Macromol. 15, 329 (1994).

    Article  Google Scholar 

  6. J.-F. Revol, W.J. Orts, L. Godbout, R.H. Marchessault, Proc. of the ACS, Div. of PMSE 71, 334(1994).

    CAS  Google Scholar 

  7. J.P. Straley, Phys. Rev. A 14, 1835 (1976).

    Article  CAS  Google Scholar 

  8. G.C. Straty, J. Res. Natl. Inst. Stand. Technol. 94, 259, (1989).

    Article  CAS  Google Scholar 

  9. R. Oldenbourg, X. Wen, R.B. Meyer, D.L.D. Caspar, Phys. Rev. Lett. 61, 1851, (1988).

    Article  CAS  Google Scholar 

  10. S. Onogi, and T. Asada in Rheology, edited by G. Astarita, G. Marrucci, L. Nicolais, (Plenum: New York, 1980; Vol. 3).

  11. K. Hongladarom, W.R. Burghardt, S.G. Baek, S. Cementwala, J.J. Magda, Macromolecules 26, 785, (1993).

    Article  CAS  Google Scholar 

  12. R. Podgornik, D.C. Rau, V.A. Parsegian, Macromolecules 22, 1780, (1989).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. NIST, Gaithersburg, 20899, MD, USA

    W. J. Orts

  2. PAPRICON, McGill Pulp and Paper Research Centre, Montreal, H3A 2A7, PQ, Canada

    J.-F. Revol, L. Godbout & R. H. Marchessault

Authors
  1. W. J. Orts
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J.-F. Revol
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. L. Godbout
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. R. H. Marchessault
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Orts, W.J., Revol, JF., Godbout, L. et al. SANS Study of Chirality and Order in Liquid Crystalline Cellulose Suspensions. MRS Online Proceedings Library 376, 317–322 (1994). https://doi.org/10.1557/PROC-376-317

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1557/PROC-376-317

Search

Navigation