Characterization of Surface Chemical Heterogeneity of Cellulosic Fibers

Authors

  • Delong Song
  • Kevin T. Hodgson

Keywords:

Single fiber wettability, wood pulp fibers, contact angle, surface chemical heterogeneity, surface roughness, AKD and ASA sizing, paper sizing, sizing tests

Abstract

In this study, the surface chemical heterogeneity and surface physical properties of single wood pulp and rayon fibers were investigated. Wetting force traces along the fiber length were obtained by applying the Wilhelmy technique to individual fibers. A parameter called the heterogeneity index was developed from advancing and receding wetting force traces via a cubic spline statistical routine and has been shown to be a meaningful parameter to quantify the surface heterogeneity of fibers. This was done for both "as is" wood pulp and rayon fibers and wood pulp treated with various dosages of the commercial sizing agents alkyl ketene dimer (AKD) and alkenyl succinic anhydride (ASA). The results indicated that the surface chemical heterogeneity index of AKD-sized fibers increased with AKD dosage, whereas the surface roughness of fibers remained virtually unchanged. This heterogeneity index is useful to more fully understand macroscopic sizing behavior of paper sheets beyond simply the value of a single fiber average advancing contact angle.

References

Berg JC (2010) An introduction to interfaces and colloids: The bridge to nanoscience. World Scientific, Singapore. 233 pp.nBoone S (2005) Testing of paper and board sizing. Pages 306-308 in JM Rodriguez and JM Guess, eds. The sizing of paper, 3rd ed. TAPPI Press, Atlanta, GA.nBosch RJ, Ye Y, Woodworth GG (1995) A convergent algorithm for quantile regression with smoothing splines. Comput Stat Data Anal 19:613-618.nDeng YL, Abazeri M (1998) Contact angle measurement of wood fibers in surfactant and polymer solutions. Wood Fiber Sci 30(2):155-164.nDraper EA (2003) Effect of single fiber properties and structure on the absorbency. MS thesis, University of Washington, Seattle, WA. 44 pp.nHearle JWS (2001) Physical structure and fibre properties. Pages 310-312 in C. Woodings, ed. Regenerated cellulose fiber. Woodhead Publishing Company, Philadelphia, PA.nHodgson KT, Berg JC (1988) Dynamic wettability properties of single wood pulp fibers and their relationship to absorbency. Wood Fiber Sci 20(1):3-17.nIhaka R, Gentleman RR (2004) (programming language). Wikipedia. http://en.wikipedia.org/wiki/R_(programming_language)'>http://en.wikipedia.org/wiki/R_(programming_language)nKlungness JH (1981) Measuring the wetting angle and perimeter of single wood pulp fibers: A modified method. TAPPI J 64(12):65-66.nKrueger JJ (1993) The relationship between single fiber contact angle and sizing performance. MS thesis, University of Washington, Seattle, WA. p. 27, 53, 58.nKrueger JJ, Hodgson KT (1994) Single-fiber wettability of highly sized pulp fibers. TAPPI J 77(7):83-87.nKrueger JJ, Hodgson KT (1995) The relationship between single fiber contact angle and sizing performance. TAPPI J 78(2):154-161.nMahale A, Wesson SP (1994) A computer model for wetting hysteresis 1. A virtual wetting balance. Colloid Surface A 89(2-3):117-131.nNeimo L (1999) Papermaking chemistry. Fapet Oy Press, Helsinki, Finland. 157 pp.nNess JM (1999) An investigation of peroxide bleached newsprint pulp self-sizing. MS thesis, University of Washington, Seattle, WA. 16 pp.nOkagawa A, Mason S (1978) Capillarography: A new surface probe. Pages 581-586 in Fundamental Research Committee, ed. Proc Fibre-Water Interactions in Papermaking, September 1977, Oxford, UK. British Paper and Board Industry Federation, London, UK.nPollock DSG (1993) Smoothing with cubic splines. Pages 1-31 in Smoothing splines, Queen Mary and Westfield College, The University of London, London, UK.nScott WE (1995) Properties of paper: An introduction, 2nd ed. TAPPI Press, Atlanta, GA. p. 127-128.nShen W, Filonanko Y, Troung Y, Parker IH, Brack N, Pigram P, Liesegang J (2000) Contact angle measurement and surface energetics of sized and unsized paper. Colloid Surface A 173:117-126.nSimonoff JS (1996) Smoothing methods in statistics. Springer-Verlag, Berlin, Germany.nSong D (2005) Characterization of surface energetic properties of wood pulp fibers. MS thesis, University of Washington, Seattle, WA. p. 24, 27, 56, 92.nTAPPI (2002a) T205. Forming handsheets for physical tests of pulp. Technical Association of the Pulp and Paper Industry, Atlanta, GA.nTAPPI (2002b) T441. Water absorptiveness of sized (non-bibulous) paper and paperboard (Cobb Test). Technical Association of the Pulp and Paper Industry, Atlanta, GA.nWesterlind BS, Berg JC (1988) Surface energy of untreated and surface-modified cellulose fibers. J Appl Polym Sci 36(3):523-534.n

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Published

2014-04-04

Issue

Number 2 / April 2014

Section

Research Contributions

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