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Physical chemistry for papermaking - labwork - 4FME3070

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  • Number of hours

    • Lectures : 0
    • Tutorials : 0
    • Laboratory works : 12.0
    • Projects : 0
    • Internship : 0
    • Written tests : 0
    ECTS : 17.0
  • Officials : Evelyne MAURET

Goals

Learning outcomes :

  • To measure and control the pH and electrical conductivity of fibrous suspensions.
  • To measure the zeta potential of cellulosic fibres.
  • To use the zeta potential values to observe the effect of introducing additives into a fibrous suspension.
  • To make shapes for different pastes and different dosages of additives.
  • To establish a list of physical and mechanical properties based on the additives tested Carry out mechanical and physical tests on the manufactured forms.
  • To synthesize the results of the experiments, analyze the experimental results, and present the experiments conducted and the experimental results obtained in teams (CR, graphs and tables of results showing mean, standard deviation, coefficients of variation, appropriate units).
Contact Evelyne MAURET

Content

This teaching corresponds to a series of pratical works which operate as a mini-project, the goal of which is to apply the theoretical knwoledge related to the course "4FMT1061 : Physical chemistry for papermaking processes".
Each group of students (made of 6 to 8 persons) specifically studies one kind of additive commonly used in papermaking. The experimental methods, the obtained results and their analysis are then presented to the entire student class.

This mini-project is made of 4 sessions.
session 1.The students have at their disposal two fibrous suspensions and additives classicaly used as wet-end chemicals for imparting specific properties to paper. The students define their own objectives for one kind of additive and prepare fibrous suspensions for which pH and conductivity are controled. The effect of the additive on the zeta potential of the fibres is evaluated. Then, the students produce handsheets from the fibrous suspensions for the different dosages.
Séance 2 : Les étudiants établissent une liste de propriétés physiques et mécaniques qui leur paraissent pertinentes au regard des additifs testés. Ils réalisent ces essais sur les formettes qu'ils ont fabriquées.
Session 2. The students list the relevant physical and mechanical properties that they want to study, regarding the addtives tested. They perform the tests on the produced handsheets.
Session 3. This corresponds to a an analysis and a discussion of the obtained results which must have been consolidated by the students before the session.
Session 4. The students make an oral presentation of their work to the entire class.



Prerequisites

Basic knowledge:

  • of the main sorts of pulps and of the papermaking process,
  • of the physical and mechanical properties of paper and board,
  • in polymer chemistry and physical chemistry.

Tests

The assessment of the student group is made from a report given to the teacher. This report is limited in size: no more than one recto verso page plus tables and figures including all the obtained results (averages, standard deviations, coeffeicient of variation, appropriate units). The assessment also includes other individual evaluations such as autonomy, involvement, initiative for the sessions 1 and 2, involvement and ability to analyse the results for the session 3, quality of the oral presentation for the session 4.
Score A = report
Score B = individual evaluation of the above listed skills.



Note finale (/20) = 0.6A + 0.4B
Final score (/20) = 0.6A + 0.4B

Calendar

The course exists in the following branches:

Additional Information

Curriculum->Pagora Engineer - Student->Semester 8


Sécurité-Environnement
Consignes données en début de séance

Bibliography

[1] Eklund, D., and Lindström, T., Paper Chemistry, DT PaperScience Publications, Grankulla, Finland, 1991.
[2] Scott, W.E., Principles of Wet End Chemistry, TAPPI Press, Atlanta, Georgia, USA, 1996.
[3] Roberts, J.C., The Chemistry of Paper, The Royal Society of Chemistry, Cambridge, UK, 1996..
[4] Neimo, L., Editor, Papermaking Chemistry, Fapet Oy, Helsinki, Finland, 1999..
[5] Scott, W.E., and Abott, J.C., Properties of paper: An Introduction, 2nd edition, TAPPI Press, Atlanta, Georgia, USA, 1995.
[6] Paulapuro, H., Paper and board grades, Fapet Oy, Helsinki, Finland, 2000 [co-edition with TAPPI, Atlanta, Ga.].
[7] Hubbe, M. (2006). Bonding between cellulosic fibers in the absence and presence of dry-strength agents: a review, Bioresources, 1(2), 281-318.
[8] Lindström, T., Wägberg, L., and Larsson, T. (2005). On the nature of joint strength in paper: A review of dry and wet strength resins used in paper manufacturing, Proceedings of the 13th Fundamental Research Symposium, Cambridge, 457-562.
[9] WAGBERG L., ANNERGREN G. Physicochemical characterization of papermaking fibres.
in The Fundamentals of papermaking materials, transactions of the 11th fundamental research symposium, Cambridge, 1997, p.-82.
[10] CHAN L.L. Wet-strength resins and their application. Atlanta : TAPPI Press, 1994.

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Date of update July 24, 2020

Université Grenoble Alpes