Depth profile of paper additives within a pulp fibre

Daisuke Tatsumi, Tatsuo Yamauchi

Research output: Contribution to conferencePaperpeer-review

11 Citations (Scopus)


Paper sheets containing polyacrylamide (PAM) as a paper chemical additive have been analysed by attenuated total reflectance Fourier transform infrared (ATR/FT-IR) spectroscopy. Absorbance ratios of the selected band of PAM to that of cellulose were used to determine PAM content. In order to determine the distribution of the additive in the radial direction of pulp fibre, ATR/FT-IR analysis was carried out after successive etching of the paper sheet. From the relationship between etching time and the thickness of removed surface layer it is possible to follow the partial concentration profiles of the additive as a function of distance from the original surface. The obtained profiles are found to be consistent with those of variable-angle ATR/FT-IR depth profiling method qualitatively. Being distributed from fibre surface toward the centre of fibre wall, PAM exists, on the whole, close to fibre surface. Addition level does not affect the distribution curve, i.e. the concentration at every depth level is roughly proportional to the addition level. In the case of a paper sheet from heavily beaten pulp, this tendency is not so clear i.e. PAM shows broad distribution at near surface layer. PAM whose molecular weight is low is distributed widely toward the inner side of the fibre wall.

Original languageEnglish
Number of pages26
Publication statusPublished - 1997
Externally publishedYes
EventTransactions of the 11th Fundamental Research Symposium in: teh Fundamentals of Papermaking Materials - Cambridge, United Kingdom
Duration: Sept 1 1997Sept 1 1997


ConferenceTransactions of the 11th Fundamental Research Symposium in: teh Fundamentals of Papermaking Materials
Country/TerritoryUnited Kingdom

All Science Journal Classification (ASJC) codes

  • General Materials Science


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