Article
Materials Science, Textiles
Carlos Tenazoa, Holmer Savastano, Samuel Charca, Maria Quintana, Elena Flores
Summary: The study examined the chemical and physical properties of Ichu and Cabuya fibers, showing that alkali treatment can effectively remove non-cellulosic components to enhance adhesion in polymer composites. Additionally, Ichu fibers were found to have amorphous silica particles on their surface, making them suitable for use in cement composites.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Polymer Science
Natalia Sienkiewicz, Midhun Dominic, Jyotishkumar Parameswaranpillai
Summary: Epoxy resins are important organic matrices with unique properties, making them widely used in composite industries. Recent studies have focused on using green fillers, such as post-agricultural waste powder and natural fibers, as reinforcement for epoxy resins instead of non-biodegradable fillers. The advantages of natural fillers include sustainability, low cost, wide availability, and biodegradability, which align with the current environmental concerns. The development and progress of green products based on epoxy resin and natural fillers have been increasing due to their desirable properties.
Review
Materials Science, Composites
Praveenkumara Jagadeesh, Madhu Puttegowda, Sanjay Mavinkere Rangappa, Suchart Siengchin
Summary: Natural fiber reinforced polymer composite is gaining popularity for its extensive properties suitable for various applications, but further fundamental knowledge in raw material processing and composite structure fabrication is needed. The quality of natural fibers depends on extraction methods and processing techniques, and their surface characteristics can be improved with suitable treatments. Alkaline treatment (NaOH) is preferred for its effectiveness and low cost among all chemical treatments.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Textiles
S. Thamarai Selvi, R. Sunitha, L. Ammayappan, C. Prakash
Summary: In this study, a futuristic approach was used to improve the compatibility between reinforcement and polymer matrix in composites through various chemical treatments. The adhesion of the reinforcement to the matrix was enhanced by modifying the surface using these chemical treatments. The chemical treatments had different effects on fiber properties and surface morphology.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Composites
Thanikodi Sathish, Praveenkumara Jagadeesh, Sanjay Mavinkere Rangappa, Suchart Siengchin
Summary: This study fabricates hybrid composites reinforced with jute, bamboo, and coir fibers and analyzes their mechanical, thermal, and morphological properties. The results show that the composite JC8, with 21% jute, 1.5% coir, and 7.5% bamboo, exhibits the highest tensile and flexural strengths, thermal stability, and better surface morphology among other hybrid composites.
POLYMER COMPOSITES
(2022)
Article
Engineering, Environmental
Gregoire David, Laurent Heux, Stephanie Pradeau, Nathalie Gontard, Helene Angellier-Coussy
Summary: The study investigates the potential of using vine shoot waste as fillers in PHBV biocomposites, demonstrating that surface gas-phase esterification can significantly improve the hydrophobicity of ViSh particles. It also concludes that ViSh particles can be used as low-cost fillers to decrease the overall cost of materials.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Materials Science, Textiles
Srinivas Shenoy Heckadka, Suhas Yeshwant Nayak, Thomas Joe, Jacob N. Zachariah, Sonia Gupta, Anil N. Kumar, Marta Matuszewska
Summary: The present study aimed to analyze the effects of chemical treatment on the physical and mechanical characteristics of natural fibers, specifically areca frond fibers, banana fibers, and flax fibers. The results indicated that the treatments led to changes in fiber diameter and tensile strength. Scanning electron microscopy and Fourier transform infrared spectroscopy were used to observe the surface morphology and functional group modifications. The findings showed that different treatments had varying effects on different types of fibers.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Chemistry, Physical
Olivier Teraube, Lea Gratier, Jean-Charles Agopian, Monica Francesca Pucci, Pierre-Jacques Liotier, Samar Hajjar-Garreau, Elodie Petit, Nicolas Batisse, Angelique Bousquet, Karine Charlet, Eric Tomasella, Marc Dubois
Summary: This study aims to improve the compatibility between flax natural fibers and mostly dispersive polymers by grafting fluorine atoms onto the fiber surface using plasma fluorination. The covalently grafted fluorine atoms reduce the fiber polarity and make it compatible with dispersive polymers. The mechanical properties and fluorine release during fiber combustion were investigated and no negative impact was observed. This eco-friendly approach improves the wettability of the fibers and shows potential for enhancing the mechanical performance of eco-composites reinforced with fluorinated fibers.
APPLIED SURFACE SCIENCE
(2023)
Review
Chemistry, Physical
Pankaj, C. S. Jawalkar, Suman Kant
Summary: Natural fiber centered polymer composites are attracting researchers due to their unique advantages, but the inferior qualities of natural fibers make them less attractive. Treatment of natural fibers to achieve good interfacial strength between fibers and polymer matrix is necessary to enhance mechanical properties of composites.
Article
Engineering, Environmental
Leonardo Davi Bonatto, Lucas Dall Agnol, Vinicius Polo Vergani, Claudio Antonio Perottoni, Otavio Bianchi, Janete Eunice Zorzi
Summary: Wild moth silk fibers have distinct properties from cultivated silk and show promising applications. However, few Lepidoptera species have had their silk properly characterized. Silk is used for various purposes in Lepidoptera, including cocoon construction, collective shelters, migration, lifelines, and prey capture. Understanding the composition and properties of these silks can help understand their role in biology and potential applications. The results of this study provide insights into the mechanical properties of different Lepidoptera silks and the correlation with specific components.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Ceramics
Liguo Zhang, Yun Ji, Jinghua Mu, Xin Ma, Lulu Wang, Guanglei Chang, Enxia Xu, Xinhong Liu, Huiyu Yuan, Junyan Cui, Jinxing Gao
Summary: In this study, β-SiAlON ceramics were prepared by adding different contents of wollastonite to the raw materials. The effect of wollastonite on the physical, chemical, and biological properties of β-SiAlON was investigated. The results showed that the addition of wollastonite improved sintering performance, increased compressive strength, and resulted in tighter sample bonding. The material exhibited low ion release and stable chemical properties. Moreover, when the content of wollastonite was <12 wt%, the ceramics demonstrated good biocompatibility and unaffected bone formation.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Fouad Belayali, Walid Maherzi, Mahfoud Benzerzour, Nor-Edine Abriak
Summary: This study aims to optimize the use of dredged sediments as fillers in hydrocarbon materials like mastic asphalt for sealing applications. River sediments from Hauts de France region were collected to investigate their impact on asphalt formulations. Certain sediments, such as MEL and NSL, have limitations due to their high organic matter content and intergranular voids, resulting in excessive bitumen consumption. However, calcination of these sediments at 550 degrees C can remove organic matter and significantly improve physical and mechanical performance. By using a soft grade of bitumen, the sediments can be substituted up to 23% and reduce the bitumen quantity by 19%.
Article
Engineering, Multidisciplinary
Elise Elsacker, Lars De Laet, Eveline Peeters
Summary: Biological materials formed by growing mycelium-forming fungal microorganisms on natural fibers can provide a solution to environmental pollution and scarcity of natural resources. This study investigates the effects of inorganic particles on mycelium materials and finds that nanoclay leads to decreased growth rate, reduced mechanical properties, and increased difficulties in degrading fibers.
Article
Materials Science, Textiles
Pedro Henrique P. M. da Silveira, Matheus P. Ribeiro, Thuane T. Silva, Andreza M. Lima, Mauricio F. Lemos, Anthony G. B. A. M. Oliveira, Lucio Fabio C. Nascimento, Alaelson Gomes, Sergio N. Monteiro
Summary: This study investigates a combination of alkaline treatment and graphene oxide coating in hemp fibers to improve their composite performance and thermal properties. The research found that the crystallinity of hemp fibers increased after alkaline treatment, leading to enhanced thermal stability and changes in glass transition temperature. The effect of GO-coating was confirmed through various analytical methods.
JOURNAL OF NATURAL FIBERS
(2022)
Review
Chemistry, Physical
Stepan S. Batsanov, Sergey M. Gavrilkin, Dmitry A. Dan'kin, Andrei S. Batsanov, Alexander V. Kurakov, Tatiana B. Shatalova, Inna M. Kulikova
Summary: This review explores the interaction between DND and water, as well as the unique physico-chemical and biological properties of colloids with low DND content. These colloids exhibit a large dielectric permittivity with temperature dependence, and quasi-periodic fluctuations during evaporation or dilution. The study also reveals the formation of cottonwool-like fibers comprising living micro-organisms and DND particles through the interaction of DND with water and air.
Article
Construction & Building Technology
Huan Zhang, Shuai Cao, Erol Yilmaz
Summary: This study investigates the effect of carbon nanotubes (CNTs) on the strength behavior of cementitious tailings backfill (CTB). The results show that CNTs significantly improve the strength and microstructure of CTB by inhibiting crack expansion and enhancing material integrity. Among them, ordinary multi-walled CNT (CNTPL) has the most significant impact on the mechanical properties of CTB. In conclusion, this study demonstrates that using the fractal properties of microstructure can better estimate the strength development of CTB specimens reinforced with different types of CNTs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ziyue Zhao, Shuai Cao, Erol Yilmaz
Summary: For mines with poor ore bodies and surrounding rocks, the most suitable mining method is the downward layered filling mining technique, which can eliminate problems related to poor ore deposit conditions. However, the safety of the artificial roof is crucial in this technique.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Geochemistry & Geophysics
Bo Gao, Shuai Cao, Erol Yilmaz
Summary: Polypropylene fiber significantly affects the strength and microstructure of cemented tailings backfill. Experimental results show that the compressive strength of fiber-reinforced cemented tailings backfill (FRCTWRF) reaches its highest value of 0.93 MPa at 6 mm fiber length and 0.6 wt.% fiber content. The peak strain of FRCTWRF is highest at 2.88% with 12 mm fiber length and 0.3 wt.% fiber content. Increasing fiber length reduces fracture volume and enhances crack resistance of FRCTWRF.
Article
Green & Sustainable Science & Technology
Muhammet Sari, Erol Yilmaz, Tugrul Kasap
Summary: This study aims to improve the long-term filling performance of cemented paste backfill (CPB) and reduce cement-related costs and environmental risks by partially substituting tailings with sand. The experimental results showed that using sand as a substitute for tailings in CPB can increase its strength and improve its structure. Additionally, sand contributes to the hydration reactions of cement and prevents acid/leach formations that may occur in the long-term ageing. Overall, the use of sand enhances the performance of CPB and reduces the environmental impacts of tailings.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Shun-man Chen, Erol Yilmaz, Zheng-gui Xiang, Yi-ming Wang
Summary: This study investigates the influence of curing conditions on the mechanical and pore structure characteristics of cementitious tailings backfill (CTB). The results show that as the curing temperature and stress increase, the strength and elastic modulus of CTB increase while the growth rates decrease. The porosity of CTB decreases and there is a good linear correlation between the strength and apparent porosity.
Article
Metallurgy & Metallurgical Engineering
Mahboube Bakhshoude, Esmaeel Darezereshki, Fereshteh Bakhtiari
Summary: The role of chloride ion in the performance of extreme thermophiles bacterium Sulfolobus acidocalarius in bioleaching process of copper sulfide concentrate at Midouk Shahr-e-Babak Complex was investigated. Gradual adaptation of bacteria to chloride ions at pH=1.5 showed that chloride ions in solution reduced the reproduction and growth rate of bacteria but did not prevent their growth. Lowering the pH from 2.0 to 1.5 increased the recovery of copper in the first few days of bioleaching.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Geochemistry & Geophysics
Nihat Utku Guner, Erol Yilmaz, Muhammet Sari, Tugrul Kasap
Summary: This study aims to improve the strength performance of cementitious paste backfill (CPB) by improving its gradation, while reducing costs and the amount of binder used per unit volume. Experimental investigation showed that adding sand significantly increased the strength of CPB (up to 99%), but the replacement rate of sand was limited to 30% due to its segregation effect. Microstructural tests revealed that the void volume of CPB decreased as the amount of added sand increased. Therefore, it was concluded that calcareous sand made a major contribution to filling strength by improving gradation adjustment and reducing the amount of cement used in CPB manufacturing.
Article
Construction & Building Technology
Huan Zhang, Shuai Cao, Erol Yilmaz
Summary: This study investigates the mechanical properties of microscopic damage and fracture evolution of 3D-printed polymer reinforced CTB. The experimental results show that the failure mode of CTB mainly starts from the low-density pore area, gradually evolves to a crack, and finally expands to the main crack by the center of the specimen. Incorporating 3D-PPL into CTBs decreases the penetrated pore number and enhances the density of CTB's microstructure.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Editorial Material
Materials Science, Multidisciplinary
Shenghua Yin, Chongchong Qi, Erol Yilmaz, Shuai Cao, Qiusong Chen
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Environmental Sciences
Zhiqiang Huang, Shuai Cao, Erol Yilmaz
Summary: Without appropriate waste management, the storage of tailings and waste rocks can cause devastating damage to ecosystems. This study evaluated the microstructure and strength behavior of cementitious tailings-crushed rock backfill with gold/tungsten tailings and rock contents. The results showed that tungsten tailings based backfills were more sensitive to crushed rock gradation, and the content and gradation of crushed rock significantly affected the failure modes of the backfills. The study's findings provide important guidance for the industrial uses of cementitious tailings-crushed rock backfill.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Baoxu Yan, Hanwen Jia, Zhen Yang, Erol Yilmaz, Honglei Liu
Summary: Based on large-scale similar simulations, this study analyzes the evolution of full-stress/strain and acoustic emission response relevant to the instability and failure of concealed goafs under multiple blasting disturbances in an open-pit iron mine. The results show the formation of a tension-shear dislocation area at the side corner of the goaf after three blasting disturbances. The vertical displacement of the goaf roof exhibits a 'two-stage increase' before roof caving, while the axial stress on the side wall undergoes 'two-stage pressure relief'.
INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Ziyue Zhao, Shuai Cao, Erol Yilmaz
Summary: This study investigates the strength and bending features of layered-fiber-reinforced cemented tailings backfill (LFR-CTB). The results show that LFR-CTB has higher flexural strength and toughness when proper fiber delamination and cement are used, and accumulated fiber delamination effectively improves the flexural features of CTB. Through the action of fibers and bonding materials, LFR-CTB maintains high post-peak rigidity. The study's key consequence is to provide a technical guideline and reference for industrial applications.
Article
Materials Science, Multidisciplinary
Jiajian Li, Shuai Cao, Erol Yilmaz
Summary: This study investigates the impact of composite fibers on the microstructure of FRCTBs, revealing that the addition of fibers can increase the percentage of weak surface, reduce the porosity of FRCTB, and limit crack expansion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Aiai Wang, Shuai Cao, Erol Yilmaz
Summary: This study analyzes the influence of different nanocellulose contents, types, and intermediate microstructure on the strength and fracture features of cementitious tailings backfill. The results show that optimizing nanocellulose content can improve the pore structure of the backfill and help suppress cracking. The study also proposes a dual nanocellulose-pore network model to explain the microscopic enhancement mechanism.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Correction
Materials Science, Multidisciplinary
Ufuk Gokhan Akkaya, Kenan Cinku, Erol Yilmaz
FRONTIERS IN MATERIALS
(2023)