PAPER making! FROM THE PUBLISHERS OF PAPER TECHNOLOGY INTERNATIONAL ® FROM THE PUBLISHERS OF PAPER TEC Volume 11, Number 1, 2025
Preparation of marine-sourced alginate fibres to produce composite paper from both green and blue carbons RM. MUHAMMAD NUR FAUZAN, 1 KOTCHAPORN THANGUNPAI, 1 AKIKO NAKAGAWA-IZUMI, 2 MIKIO KAJIYAMA 2 & TOSHIHARU ENOMAE 2 Recent trends in papermaking have led to an increase in the use of alternative resources. Alginate fibres, derived from marine sourced brown seaweed (blue carbon), offer a potential alternative to wood pulp in paper production. The process of obtaining alginate involves pre-treatment, alkaline extraction, precipitation, and purification. Through successful extraction, alginates were obtained from Laminaria japonica (L. japonica) and Sargassum polycystum (S. polycystum) with yields ranging from 17.4% to 28.9% and 14.7% to 26.8%, respectively. The molecular mass of the alginates ranged from 0.68 × 105 to 2.74 ×105 g mol − 1 for L. japonica and from 0.39 × 105 to 0.994 × 105 g mol − 1 for S. polycystum. Calcium alginate fibres and wood pulp fibres were combined to create composites. The results from this study suggest that the composites achieved an optimum tensile index when the samples contained 50% calcium alginate fibres. Although the results were promising, the tensile index of the paper made exclusively from pulp fibres remained superior. Furthermore, thermal degradation tests demonstrated improved thermal stability for the composite papers compared to hardwood bleached kraft pulp (HBKP) sheets. In conclusion, a composite prepared from a mixture of calcium alginate and wood pulp fibres was successfully produced and overall 50% inclusion of calcium alginate fibres provided an optimum composite. Contact information: 1 Degree Programs in Life and Earth Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8572, Japan. 2 Institute of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8572, Japan. RSC Sustainability, 2025, 3, 599 – 610 https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00073k Creative Commons Attribution 3.0 International License
The Paper Industry Technical Association (PITA) is an independent organisation which operates for the general benefit of its members – both individual and corporate – dedicated to promoting and improving the technical and scientific knowledge of those working in the UK pulp and paper industry. Formed in 1960, it serves the Industry, both manufacturers and suppliers, by providing a forum for members to meet and network; it organises visits, conferences and training seminars that cover all aspects of papermaking science. It also publishes the prestigious journal Paper Technology International ® and the PITA Annual Review , both sent free to members, and a range of other technical publications which include conference proceedings and the acclaimed Essential Guide to Aqueous Coating .
Article 2 – Algae Fibres for Papermaking
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