Bonding of Oxidized Cellulose Fibers and Interaction with Wet Strength Agents
Keywords:
Cellulose fibers, bonding, oxidization, wet strengthAbstract
A sulphite pulp was oxidized with oxidized with dichromate in oxalic acid to introduce primarily aldehyde groups into the fibers. Compared to unmodified pulps, this method results in greater wet strength, which can be further enhanced by hert treatment, Addition of a high molecular weight carbony] containing additives, such as dialdehyde starch, was found tol have a synergistic effect on the wet strength. Although acetal and hemiacetal bonds may contribute to this wet strength, an additional crosslinking reaction has been postulated to more satisfactorily explain the experimental observations. An aldol condensation type reaction between adjacent carbony] groups has thus been suggested as a primary reaction in the development of wet strength in pulp systems containing aldehyde groups. Confirmation of this theory, however, awaits model compound studies.References
Eldred, N. R., and J. C. Spicer. 1963. Glyoxal: a unique wet-strength agent. Tappi 46:608-612.nGoring, D. A. I., and G. Suranyi. 1967. Modification of cellulose in a corona discharge. Pulp Paper Mag. Can, 68:T-372-377.nHofretter, B. 1965. Dialdehyde starches, Chap, 5 in Wet strength in paper and paperboard. Tappi Monograph No. 29. New York Pp. 50-73.nJohns, W. E., H. D. Layton, T. Nguyen, and J. K. Woo. 1978. The nonconventional bonding of white fir flakboard using nitric acid. Holzforschung 32: 162-166.nJohns, W. E., and T. Nguyen. 1977. Peroxyacetic acid bonding of wood. For. Prod. J. 27:17-23.nKim, C. Y., and D. A. I. Goring. 1971. Surface morphology of polyethelene after treatment in a corona discharge. J. Appl, Polym. Sci. 15:1357-1364.nLuner, P., E. Erickson, K. P. Vemuri, and B. Leopold. 1967a. The effect of chemical modification on the mechanical properties of paper. I. Oxidation and reduction of rayon fibers. Tappi 50:37-39.nLuner, P., P. Vemuri, and B. Leopold. 1967b. The effect of chemical modification on the mechanical properties of paper. II. Wet strength of oxidized springwood and summerwood southern pine kraft fibers. Tappi 50:117-120.nLuner, P., P. Vemuri, and F. Womeldorff. 1967c. The effect of chemical modification on the mechanical properties of paper. III. Dry strength of oxidation springwood and summerwood southern pine kraft fibers. Tappi 50:227-230.nMack, C. H., and W. A. Reeves. 1961. Wrinkle resistant properties of dialdehyde cotton, Text. Res, J. 31:800-803.nMeller, A. 1958. The effect on paper wet strength of oxidation of the carbodydrate polymers in wood pulps. Tappi 41:679-683.nMirza, J., P. J. Borchert, W. L. Kaser, and J. H. Curtis. 1964. Cationic dispersion of dialdehyde starch. II. A comparative evaluation on bleached softwood sulfate. Tappi 47:583-589.nSradel, M., and D. A. I. Goring. 1975. Corona induced autohesion of polypropylene. Dependence of bonding on frequency and power consumption in various gases. Can. J. Chem. Eng. 53:427-430.nYoung, R., P. Luner, and E. Fishman. 1970. The effect of chemical modification on the mechanical properties of paper. IV, Hydrogen bonding of tetrahydropyran derivatives. Tappi 53:1126-1130.n
Downloads
Published
Issue
Section
License
The copyright of an article published in Wood and Fiber Science is transferred to the Society of Wood Science and Technology (for U. S. Government employees: to the extent transferable), effective if and when the article is accepted for publication. This transfer grants the Society of Wood Science and Technology permission to republish all or any part of the article in any form, e.g., reprints for sale, microfiche, proceedings, etc. However, the authors reserve the following as set forth in the Copyright Law:
1. All proprietary rights other than copyright, such as patent rights.
2. The right to grant or refuse permission to third parties to republish all or part of the article or translations thereof. In the case of whole articles, such third parties must obtain Society of Wood Science and Technology written permission as well. However, the Society may grant rights with respect to Journal issues as a whole.
3. The right to use all or part of this article in future works of their own, such as lectures, press releases, reviews, text books, or reprint books.
