Ceramics-Silikáty |
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ISOLATION OF CELLULOSE NANOFIBRILS FROM Enteromorpha prolifera AND ITS REINFORCEMENT CAPABILITY FOR CEMENTITIOUS COMPOSITES
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Bai Jian 1,2, Yuan Ye 2, Yang Yiming 2, Lin Yanran 2, Luo Xiaoquan 2, Wang Xinyang 2, Zhou Yihong 1, 3
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1 Hubei Provincial Key Laboratory of Construction and Management in Hydropower Engineering，
2 School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
3 School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China
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Keywords: Cellulose nanofibrils, Enteromorpha prolifera, Microwave-assisted alkali treatment, High-intensity ultrasonication, Mechanical properties
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In this study, Enteromorpha-based cellulose nanofibrils (ECNFs) were isolated from Enteromorpha prolifera, a coastal algal biomass, through a sustainable process involving microwave-assisted alkali treatment, bleaching, demineralisation, and high-intensity ultrasonication. The isolated ECNF exhibited a high aspect ratio, with an average diameter of 25.7 nm and a length of several micrometres, and demonstrated excellent thermal stability with a maximum degradation temperature of 345 °C. When incorporated into cement mortar, the ECNFs significantly enhanced the mechanical properties of the composites. At an optimal dosage of 0.05 wt.%, ECNFs improved the compressive and flexural strengths of the mortar by 12.7% and 16.7%, respectively, after 7 days of curing. This reinforcement effect was superior to that achieved with commercial cellulose nanofibrils (CCNFs), attributed to ECNF’s larger specific surface area, higher water retention capacity, and nanoscale bridging ability, which contributed to a denser and more uniform microstructure. The findings highlight the potential of ECNFs as a sustainable and effective reinforcement material for cementitious composites, offering a sustainable approach to utilizing algal waste for high-performance construction applications. |
doi: 10.13168/cs.2025.0020
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