Helena Fjellström

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Background

Ph D, Research Engineer
My area of research is within Mechanical Fibre Technology, and my present studies include improving energy efficiency during refining by studying the swelling properties of fibres under different process conditions.

Publications

Articles in journals

Fjellström, H. , Engstrand, P. & Htun, M. (2013). ON THE RELATIONSHIP BETWEEN WOOD FIBRE WALL SWELLING, CHARGED GROUPS, AND DELAMINATION DURING REFINING. J-FOR-JOURNAL OF SCIENCE & TECHNOLOGY FOR FOREST PRODUCTS AND PROCESSES, vol. 3: 4, pp. 30-34.  

Fjellström, H. , Engstrand, P. & Htun, M. (2013). On the relationship between wood fibre wall swelling, charged groups, and delamination during refining. Journal of Science & Technology for Forest Products and Processes, vol. 3: 4, pp. 30-34.

Fjellström, H. , Höglund, H. , Paulsson, M. & Forsberg, S. (2009). The UV-screening properties of coating layers : The influence of pigments, binders and additives. Nordic Pulp & Paper Research Journal, vol. 24: 2, pp. 206-212.    

Fjellström, H. , Höglund, H. , Paulsson, M. & Rundlöf, M. (2008). Discolouration of mechanical and chemimechanical pulps : influence of wood raw material, process and ageing method. Nordic Pulp & Paper Research Journal, vol. 23: 1, pp. 14-18.    

Fjellström, H. , Höglund, H. , Forsberg, S. , Paulsson, M. & Rundlöf, M. (2007). A novel method of studying the ability of coating layer to retard the photo-yellowing of the base paper. Nordic Pulp & Paper Research Journal, vol. 22: 3, pp. 343-349.    

Fjellström, H. , Höglund, H. , Forsberg, S. & Paulsson, M. (2007). Inhibition of light-induced brightness reversion of high-yield pulps : the UV-screening properties of coating layers containing kaolin or calcium carbonate pigments. Nordic Pulp & Paper Research Journal, vol. 22: 3, pp. 350-355.    

Fjellström, H. , Höglund, H. & Paulsson, M. (2007). Light-induced yellowing of mechanical and chemimechanical pulp sheets : influence of wood raw material, process and ageing method. Nordic Pulp & Paper Research Journal, vol. 22: 1, pp. 117-123.    

Conference papers

Logenius, L. , Fjellström, H. & Engstrand, P. (2014). A sustainable analysis of sulphonic acid content in CTMP pulps. In International Mechanical Pulping Conference, IMPC 2014, part of PulPaper 2014 Conference. Espoo :

Logenius, L. , Engberg, B. A. , Fjellström, H. & Engstrand, P. (2013). Mechanical Properties of Sulphonated Spruce Wood. Paper presented at the 8th Fundamental mechanical pulping research seminar

Fjellström, H. , Engstrand, P. & Htun, M. (2013). On the relationship between charged groups, chemical environment and delamination during refining.. Paper presented at the 8th International Fundamental Mechanical Pulp Research Seminar (IFMPRS), Åre, Sweden, Jan 29-31, 2013

Fjellström, H. , Engstrand, P. & Htun, M. (2012). Aspects of fibre wall swelling in high-yield pulp.. In PROCEEDING OF THE 4TH INTERNATIONAL CONFERENCE ON PULPING, PAPERMAKING AND BIOTECHNOLOGY (ICPPB '12), VOLS. I AND II.. pp. 1183--1186.  

Fjellström, H. , Engstrand, P. , Granfeldt, T. & Logenius, L. (2011). Predicting CTMP bleachability using wood shavings. In 16th International Symposium on Wood, Fiber and Pulping Chemistry - Proceedings, ISWFPC.. pp. 613--616.    

Fjellström, H. , Höglund, H. , Paulsson, M. & Forsberg, S. (2006). A novel method for studying the photo-stabilising properties of coating layers. Paper presented at the 5th Fundamental Mechanical Pulp Reserch Seminar (FMPRS),Trondheim, Norway, 31 May-1 June 2006

Fjellström, H. , Höglund, H. , Paulsson, M. & Forsberg, S. (2005). Influence of coating formulation on light-induced brightness stability of mechanical and chemimechanical pulp sheets. In International Mechanical Pulping Conference: IMPC 2005, Oslo, Norway, 7-9 June 2005.. pp. 339--343.

Doctoral theses, comprehensive summaries

Fjellström, H. (2008). Inhibition of light-induced colour reversion of wood-containing papers by means of coating. Dis. (Comprehensive summary) Sundsvall : Mid Sweden University, 2008 (Mid Sweden University doctoral thesis : 44)  

Licentiate theses, comprehensive summaries

Fjellström, H. (2006). The Photostabilising Effect of Coating Layers on CTMP‐based Papers. Lic. (Comprehensive summary) Sundsvall : Mid Sweden University, 2006 (Mid Sweden University licentiate thesis : 13)