Pulp Fines-Characterization, Sheet Formation, and Comparison to Microfibrillated Cellulose
Wolfgang Johann Fischer1,2, Melanie Mayr3, Stefan Spirk4
1Institute of Paper, Pulp and Fibre Technology, Graz University of Technology, Inffeldgasse 23, 8010 Graz, Austria. WolfgangJohann.Fischer@sappi.com.
Polymers
|April 12, 2019
Summary
Fiber fines, cellulosic microparticles in papermaking, were isolated and analyzed. Their properties were similar to microfibrillated celluloses, suggesting potential new applications for these paper byproducts.
Area of Science:
- Materials Science
- Chemical Engineering
- Forest Products
Background:
- Fiber fines are cellulosic microparticles generated during pulp and paper production.
- These fines influence the properties of the final paper product.
- Understanding fines requires their isolation and study as independent materials.
Purpose of the Study:
- To isolate fiber fines from pulp using laboratory methods.
- To characterize the morphological and physical properties of isolated fines.
- To compare fines with microfibrillated celluloses (MFC) and explore potential applications.
Main Methods:
- Isolation of fines using a laboratory pressure screen.
- Concentration of fines suspension via dissolved air flotation.
- Morphological analysis and handsheet preparation for property testing (density, contact angle, elasticity, strain).
Main Results:
- Isolated fines were characterized and compared morphologically to MFC.
- Handsheets made from fines exhibited properties comparable to MFC.
- Key paper properties like apparent density, contact angle, modulus of elasticity, and strain were measured.
Conclusions:
- Fiber fines possess properties similar to MFC, indicating their potential as a valuable material.
- This research enhances the understanding of fines' impact on paper products.
- Identified properties suggest new avenues for utilizing fiber fines beyond traditional papermaking.
Keywords:
contact anglefiber finesmicrofibrillated cellulosepulp finessheet formingsurface roughnesstensile propertiesvacuum filtrationMore Related Videos
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