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Fibers, Volume 11, Issue 4

April 2023 - 5 articles

Cover Story: Chitosan (CS) fibers coated with TEMPO-oxidized cellulose nanofibers (CS/TOCN fibers) were made using a wet spinning method, dissolving CS in acetic acid. Increasing TOCN concentration improved the tensile strength and ammonia adsorption (41.39%, 8.3 mg/g). Using 2% NaOH and 0.01% TOCN as the coagulation solution produced the highest ammonia adsorption. In water, CS/TOCN fibers with negative charges adsorbed more positively charged lysozyme (Lz) than CS fibers with positive charges, while CS fibers adsorbed more negatively charged cytochrome C (Cyt C) and bovine serum albumin (BSA) in phosphate-buffered saline solutions. The adsorption of phytic acid using the CS/TOCN fibers reached 64.18% (288 mg/g) in 60 min. Therefore, TOCNs improved the tensile properties of CS fibers and preferred positively charged materials like ammonia, Lz, and phytic acid contaminated in water. View this paper

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Article

23 Citations

3,882 Views

16 Pages

Shear Strengthening and Repairing of Reinforced Concrete Deep Beams Damaged by Heat Using NSM–CFRP Ropes

Ahmad Al-khreisat,
Mu’tasime Abdel-Jaber and
Ahmed Ashteyat

Fibers2023, 11(4), 35;https://doi.org/10.3390/fib11040035

13 April 2023

This study investigates experimentally the shear strengthening and repairing of reinforced concrete (RC) deep beams damaged by heat utilizing near-surface mounted carbon fiber reinforced polymers (NSM-CFRP) ropes. The main parameters adopted in this...

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Article

32 Citations

3,588 Views

25 Pages

An Electromechanical Impedance-Based Application of Realtime Monitoring for the Load-Induced Flexural Stress and Damage in Fiber-Reinforced Concrete

Maria C. Naoum,
George M. Sapidis,
Nikos A. Papadopoulos and
Maristella E. Voutetaki

Fibers2023, 11(4), 34;https://doi.org/10.3390/fib11040034

11 April 2023

Effective real-time structural health monitoring in concrete structures is paramount to evaluating safety conditions and the timely maintenance of concrete structures. Especially, the presence of discrete fibers in fiber-reinforced concrete restrains...

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Article

17 Citations

4,112 Views

24 Pages

Improving the Physical and Mechanical Characteristics of Modified Aerated Concrete by Reinforcing with Plant Fibers

Alexey N. Beskopylny,
Evgenii M. Shcherban’,
Sergey A. Stel’makh,
Levon R. Mailyan,
Besarion Meskhi,
Alexandr Evtushenko,
Diana El’shaeva and
Andrei Chernil’nik

Fibers2023, 11(4), 33;https://doi.org/10.3390/fib11040033

3 April 2023

An urgent and promising direction in the development of building materials science is the improvement of the quality of non-autoclaved aerated concrete. In view of the obvious disadvantages of non-autoclaved aerated concrete compared to the autoclave...

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Article

1 Citations

2,895 Views

15 Pages

Adsorption Studies of Ammonia, Protein, and Phytic Acid Using Chitosan Fiber Coated with Oxidized Cellulose Nanofiber

Duangkamol Dechojarassri,
Kensuke Nishida,
Ryousuke Ozakiya,
Tetsuya Furuike and
Hiroshi Tamura

Fibers2023, 11(4), 32;https://doi.org/10.3390/fib11040032

30 March 2023

Herein, chitosan (CS) fibers coated with TEMPO-oxidized cellulose nanofibers (CS/TOCN fibers) were successfully prepared using a wet spinning technique; CS was dissolved in acetic acid to obtain a CS doping solution. The tensile strength and ammonia...

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Article

10 Citations

3,081 Views

18 Pages

Effect of Elevated Temperature on the Behavior of Amorphous Metallic Fibre-Reinforced Cement and Geopolymer Composites

Faiz Uddin Ahmed Shaikh,
Narwinder Singh Kahlon and
Attiq Ur Rahman Dogar

Fibers2023, 11(4), 31;https://doi.org/10.3390/fib11040031

28 March 2023

To improve the tensile, flexural, and ductility properties of geopolymer composites, amorphous metallic fibres (AMF) are used to reinforce these composites, and the behavior of these composites at elevated temperatures has been assessed in this study...

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