Improvement of Physical Properties of Paper by Esterification of Cellulose

셀룰로오스 에스테르화에 의한 종이의 강도변화

  • Published : 1998.06.01

Abstract

This treatment was applied to bleached softwood kraft pulp handsheets in an effort to improve physical strength of paper. Paper strength was improved by esterification of cellulose and polycarboxylic acid. Because hydrogen bond of carboxyl group is stronger than that of hydroxyl group, polycarboxylic acid forms stronger hydrogen bond than cellulose does. 1,2,3,4,-cyclopentanetetracarboxylic acid (CPTA) and sodium dihydrogen phosphate ($NaH_2O_4$) were used as polycarboxylic acid and catalyst, respectively This reaction was confirmed by the weight gain of the handsheets, by FTIR spectrum and by changes in mechanical properties of sheets. Wet tensile strength was improved when handsheets were treated with polycarboxylic acid. However, tear strength and burst strength decreased.

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References

  1. Tappi.J v.77 no.8 Horie,D;Biermann
  2. Tappi. J v.77 no.3 Caulfield,D.F.
  3. Pulp & Paper(Third Edition) v.3 Casey, J.P.
  4. Paper Chemistry Roberts, J. C.
  5. Indian Journal of Chemistry v.27A Biemann, CJ
  6. Textile Chemist and Colorist v.21 no.2 Welch,C.M.;Kottes-Andrews, B.A.
  7. Textile Rearch J v.37 no.11 Rowland, S.P.;Welch, C.M.;Bramann, M.A.F.
  8. Textile Rearch J v.58 no.8 Welch, C.M.
  9. American Dyestuff Reporter v.52 Gaglliardi, D.D.;Shippee, F.B.
  10. U.S. Pat. 4,975,209 Welch, C.M.;Andrews, B.K.