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Green materials from added-lignin thermoformed pulps
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0002-0583-224x
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0003-0140-1693
2022 (English)In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 185, article id 115102Article in journal (Refereed) Published
Abstract [en]

In this article, added-lignin thermoformed pulps (ALTP) were explored as a new alternative for green materials. Technical lignin was added to mechanical pulp and subsequently thermoformed, yielding a biobased material with lignin contents above natural levels. This material was tested for its mechanical properties, water-uptake, and density. In addition, FTIR and TGA-DSC were used to characterize the lignin samples, i.e., Soda, Kraft, and hydrolysis lignin, as well as lignosulfonates. The material properties were significantly changed at 20 – 40 wt% added-lignin per dry fiber. Lignin addition increased density and reduced water-uptake and wettability. The effect on mechanical properties could vary, however, pure lignin had a more beneficial effect than hydrolysis lignin containing residual cellulose. Higher stiffness was observed for the pure lignin samples at constant or decreasing tensile strength. In conclusion, ALTP is a promising material for developing new pulp products and plastics-replacements, where the ratio and type of added-lignin may be used to fine-tune the desired characteristics. © 2022 The Authors

Place, publisher, year, edition, pages
Elsevier B.V. , 2022. Vol. 185, article id 115102
Keywords [en]
Fiber-based materials, Hydrolysis lignin, Kraft lignin, Lignin, Lignosulfonates, Soda lignin, Thermoforming, Density (specific gravity), Hydrolysis, Tensile strength, Bio-based materials, Fibre-based materials, Green materials, Hydrolysis lignins, Lignin contents, Water uptake, salt, secondary metabolite, stiffness, Hot Forming
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-60005DOI: 10.1016/j.indcrop.2022.115102Scopus ID: 2-s2.0-85131223944OAI: oai:DiVA.org:ri-60005DiVA, id: diva2:1701839
Note

Funding text 1: The authors gratefully acknowledge the financial support from the Trøndelag County Council.

Available from: 2022-10-07 Created: 2022-10-07 Last updated: 2023-05-25Bibliographically approved

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Ruwoldt, JostOpedal, Mihaela Tanase

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