Article
Environmental Sciences
K. R. Jaya Sheeba, Jagadeesh Kumar Alagarasan, Jeyaprakash Dharmaraja, S. Anne Kavitha, Sutha Shobana, Sundaram Arvindnarayan, Manoharan Vadivel, Moonyong Lee, Krishna Priya Retnam
Summary: The aim of this study is to investigate the effects of alkali treatment on the morphology, chemical composition, tensile capabilities, structural changes, and thermal degradation of Acacia pennata stem fibers. SEM image and pXRD analyses support the improved surface roughness of the fibers after alkaline treatment. XRD analysis reveals an improved fiber crystallinity index, which is consistent with the SEM pictograms. Alkali-treated fibers exhibit a higher percentage of cellulose and ash, and a lower percentage of hemi-cellulose, lignin, pectin, wax, and moisture compared to untreated fibers. The low density and high cellulosic content of alkali-treated fibers enhance their suitability as fiber matrices. The thermal behavior of the fibers at various temperatures is demonstrated by TG-DTA analysis, and their tensile strength is also investigated.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Composites
Mohammad Jawaid, Sameer A. Awad, Mohammad Asim, Hassan Fouad, Othman Y. Alothman, Carlo Santulli
Summary: In this study, OPF and PALF reinforced biophenolic resin composites and hybrid composites were fabricated and analyzed for their structural, thermal, and mechanical properties. Results showed that the hybrid composites exhibited better properties compared to pure composites, with improved tensile, flexural, and thermal stability. The reinforcement of pure and hybrid composites into the matrix also enhanced storage and loss moduli, with significant improvements observed in the pure composite samples. Additionally, the damping factor was significantly reduced by the reinforcement of hybrid composites. This study suggests that the obtained hybrid composites are suitable for various structural and nonstructural applications.
POLYMER COMPOSITES
(2021)
Article
Multidisciplinary Sciences
Bernhard Ungerer, Ulrich Mueller, Antje Potthast, Enrique Herrero Acero, Stefan Veigel
Summary: In the development of structural composites based on regenerated cellulose filaments, the physical and chemical interactions at the fibre-matrix interphase need to be fully understood. The isocyanate treatment significantly decreased the mechanical properties of the yarn, with a reduced molecular weight of cellulose and critical process parameters affecting the extent of reduction in mechanical performance identified. Additional steps using calcium carbonate to trap hydrogen ions are proposed to address the degradative reactions caused by the treatment.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Textiles
Abubakar D. Ahmed, Babangida D. Mathew, Sabastine C. Ezike, Pascal Timtere
Summary: This paper investigates the effects of sodium hydroxide treatment on the surface of baobab pod fibers (BPFs) at different soaking times. The optimized duration is found to be 80 minutes, which improves the thermal stability and mechanical properties of the fibers.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Textiles
Sivasubramanian Palanisamy, Kalimuthu Mayandi, Shanmugam Dharmalingam, Nagarajan Rajini, Carlo Santulli, Faruq Mohammad, Hamad A. Al-Lohedan
Summary: The tensile strength and fracture morphology of fibers extracted from Acacia Caesia bark were investigated for their potential use as reinforcement in polymer composites. The study found that fibers treated with 10% NaOH showed the highest tensile strength and exhibited various fracture morphologies.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Construction & Building Technology
Raylane de Souza Castoldi, Lourdes Maria Silva de Souza, Felipe Souto, Marco Liebscher, Viktor Mechtcherine, Flavio de Andrade Silva
Summary: This study evaluated the effect of alkali treatment on sisal fibers and found that it can improve the fiber properties and enhance their effectiveness as reinforcement in cement-based matrices, while also being sustainable and suitable.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Textiles
Walid Abotbina, S. M. Sapuan, M. T. H. Sultan, M. F. M. Alkbir, R. A. Ilyas
Summary: The study examines the use of black seed fiber as a reinforcing material for cornstarch-based biocomposites. Different concentrations of black seed fiber and a plasticizer mixture were used to fabricate the biocomposites. The results showed that increasing the black seed fiber concentration improved the mechanical properties and thermal stability of the films, but decreased biodegradability. The addition of black seed fiber has the potential to enhance the performance of biopolymers in response to community needs and environmental concerns.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Textiles
Amutha Venugopal, Senthil Kumar Boominathan
Summary: This study investigated the fundamental properties of raw and alkalized Acacia Concinna fiber (ACF), including diameter, density, chemical composition, crystalline nature, thermal behaviors, tensile properties, and surface topography. The results showed that the optimal treatment of ACF with 5% NaOH for 45 minutes resulted in favorable changes in chemical composition. Alkalization also led to reductions in lignin and hemi-cellulose content, improvement in crystallinity index and crystalline size, and alteration in surface topography. Overall, alkalization enhanced the suitability of ACF as reinforcement in green composites.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Energy & Fuels
Praveen Nagarajan Durai, Kathir Viswalingam, B. Senthilkumar, Divya Divakaran, Suchart Siengchin
Summary: In this study, the surface of the raw Musa acuminata peduncles fiber (MAPF) was modified by using a 5% alkali solution. Chemical and physical analyses showed that soaking the MAPF in the alkali solution for 60 minutes resulted in higher cellulose fraction, reduced diameter, slightly increased density, eradication of amorphous fraction, and improved bonding ability with polymer matrix. Thermogravimetric analysis revealed that MAPF-reinforced plastics could be used up to 175 degrees C. Single fiber tensile testing confirmed enhancement in the tensile strength and tensile modulus of the optimally alkalized MAPF.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Construction & Building Technology
Haoyu Dou, Jin Bai, Hao Lu, Tingting Zhang, Lingxue Kong, Zongqing Bai, Wen Li
Summary: The addition of TiO2 in basalt fiber can effectively enhance its alkali resistance and mechanical properties. The presence of TiO2 reduces the viscosity of basalt melt and increases the tensile strength of the fiber. Moreover, TiO2 forms insoluble titanium hydroxide in the basalt fibers, reducing the weight loss in alkaline solution.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Materials Science, Textiles
V. Amutha, B. Senthilkumar
Summary: This study evaluated the suitability of fiber collected from the bark of Acacia concinna for composite reinforcement through chemical analysis, Fourier Transform-Infrared (FTIR) Analysis, and X-ray diffraction analysis. It was found that ACF possesses higher thermal stability and lower density, making it a desirable asset for reinforcement in polymer matrices.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Materials Science, Textiles
XiaoHui Song, ChuanMo Huang, Huadong Qin, WenFang Guan, YiShen Ye
Summary: In this study, willow fiber was modified using acid and alkali treatment. Acid treatment removed lignin and improved thermal stability and reactivity, while alkali treatment further removed lignin and improved fiber surface and crystallinity.
JOURNAL OF ENGINEERED FIBERS AND FABRICS
(2022)
Review
Polymer Science
N. M. Nurazzi, M. R. M. Asyraf, M. Rayung, M. N. F. Norrrahim, S. S. Shazleen, M. S. A. Rani, A. R. Shafi, H. A. Aisyah, M. H. M. Radzi, F. A. Sabaruddin, R. A. Ilyas, E. S. Zainudin, K. Abdan
Summary: Chemical treatments significantly impact the thermal stability of natural fiber-reinforced polymer composites, influencing the structure, drying, and ignition temperatures. Thermo gravimetric analysis data serves as guidance in determining composite purity, composition, and stability temperatures, while also affecting the effectiveness of chemical treatments in bonding natural fibers with polymer matrix.
Article
Multidisciplinary Sciences
Gurukarthik Babu Balachandran, P. Narayanasamy, Anandha Balaji Alexander, Prince Winston David, Rajesh Kannan Mariappan, Muthu Eshwaran Ramachandran, Suyambulingam Indran, Sanjay Mavinkere Rangappa, Suchart Siengchin
Summary: This study isolated and characterized micro-cellulosic fibers from the bark of Morinda tinctoria for the first time. The results showed that the fibers had a relatively large diameter and density, as well as strong surface absorption properties, good crystallinity, and thermal stability. These fibers have the potential to be used as substitutes for reinforcing novel bio composites.
Article
Polymer Science
Mariana Domnica Stanciu, Horatiu Teodorescu Draghicescu, Ioan Calin Rosca
Summary: The study compared the mechanical properties of two different types of glass fiber-reinforced polyester composite materials (GFRP-RT500 and GFRP-MAT450), revealing differences in elastic modulus, ultimate tensile stress, and performance under cyclic loading.