Article
Polymer Science
Francesc Xavier Espinach, Fernando Julian, Manel Alcala, Fabiola Vilaseca, Felix Carrasco, Pere Mutje
Summary: The performance of henequen fibers and polypropylene composites with and without coupling agent were evaluated. Henequen fibers were found to be a possible substitute reinforcement material for sized glass fibers, and the use of a 4% coupling agent improved the tensile strength of the composites significantly within the studied range. The interface quality between the fibers and the composites was also evaluated.
Article
Mechanics
Milan Ferdinand, Robert Vardai, Thomas Lummerstorfer, Claudia Pretschuh, Markus Gahleitner, Gabor Faludi, Janos Moczo, Bela Pukanszky
Summary: Polypropylene composites with poly(ethylene terephthalate) fibers were prepared by injection molding at temperatures ranging from 190 to 260 degrees C. Increasing the processing temperature resulted in shrinkage of the fibers due to relaxation of orientation and recrystallization. These structural changes led to deterioration of the composite properties, reducing impact resistance to about 1 kJ/m2 at 260 degrees C. Heat setting of the PET fibers improved the crystalline structure, reducing shrinkage and improving composite properties even at high processing temperatures. PP composites modified with PET fibers are suitable for automotive structural materials, providing a stiffness of around 2 GPa and an impact resistance of over 20 kJ/m2 if processed at low temperatures.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Lei Zhou, Hadi Haeri, Vahab Sarfarazi, Soheil Abharian, Manoj Khandelwal, Mohammad Fatehi Marji
Summary: The effects of porosity and its geometry on the tensile features of concrete were investigated using the Brazilian test and three-dimensional PFC model. The study found that the porosity geometry plays an important role in the fracturing pattern, with different pore shapes leading to different fracture energies and crack initiation stresses. The results highlight the significance of considering porosity geometry in understanding the mechanical behavior of concrete.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Biochemistry & Molecular Biology
Hong Gun Kim, Yong-Sun Kim, Yun-Su Kuk, Lee Ku Kwac, Sun-Ho Choi, Jihyun Park, Hye Kyoung Shin
Summary: Carbon fibers were produced from lyocell by grafting polyacrylamide (PAM) through electron-beam irradiation (EBI), resulting in increased carbon yields of up to 55%. The morphology and mechanical properties of the fibers were highly influenced by the concentration of PAM, with fibers produced at lower concentrations exhibiting better characteristics. This study established the feasibility of using EBI-induced PAM grafting on lyocell fabrics for high-performance carbon fiber production.
Article
Polymer Science
Hsi-Hsun Tsai, Shao-Jung Wu, Yu-De Wu, Wei-Zheng Hong
Summary: This study examines the crystallinity and thermal stability of glycol-modified Poly(ethylene terephthalate) (PETG) and PET materials using differential scanning calorimetry (DSC) and Thermogravimetric Analyzer (TGA). It is found that the addition of talcum powder improves the viscosity and crystallinity of PET material, resulting in highly mechanical 3D printed parts.
Article
Chemistry, Physical
N. K. Pramanik, R. S. Haldar, Y. K. Bhardwaj, R. K. Khandal
Summary: The crosslinking efficiency of Triallyl isocyanurate (TAIC) in electron beam (EB) induced crosslinking of Nylon 6 (N6) has been studied, showing an increase in physico-chemical properties with higher TAIC concentration. A synergistic effect between TAIC and absorbed dose was observed, leading to a decrease in N6 crystallinity. The presence of TAIC was found to predominantly induce crosslinking in N6 under EB irradiation, resulting in decreased water absorption capacity.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Construction & Building Technology
Olga Szlachetka, Joanna Witkowska-Dobrev, Marek Dohojda
Summary: This paper presents the results of strength tests and surface structure evaluation of selected vapor-permeable membranes. The obtained results for tensile parameters and resistance to tearing are within the manufacturer's declared values. However, the mass per unit area of one membrane was outside the specified range. Structure analysis showed that digital images are sufficient to observe the changes occurring in the microstructure of membranes.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Review
Construction & Building Technology
Jie Li, Jun Xia, Luigi Di Sarno, Guobin Gong
Summary: This review focuses on the manufacturing methods and performance optimization of fiber-reinforced pervious concrete (FPC), including mix design, mixing procedures, compaction techniques, and curing methods. By analyzing the available research data, recommendations for optimizing fiber usage in PC are provided, and the effects of different fiber types on PC performance are summarized.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Chemical
Ribin Varghese Pazhamannil, V. N. Jishnu Namboodiri, Haitham M. M. Hadidi, Abhilash Edacherian, P. Govindan
Summary: The mechanical properties of components manufactured by fused filament fabrication are not sufficient for industrial applications, requiring post-processing for improved interlayer strength and mechanical characteristics. This study explores the effects of annealing on polycarbonate acrylonitrile butadiene styrene (PC/ABS) manufactured by fused filament fabrication. Experimental analysis demonstrates that heat treatment at 180℃ for 1 hour improves the ultimate tensile strength by 20.39% and enhances flexural strength by 53.21%. Microstructural imaging confirms enhanced interlayer diffusion and bonding, although surface flaws are observed due to high heat exposure.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yan Yu, Yang Yu
Summary: This study investigates the irradiation damage process of NiCoCrFe high-entropy alloy (HEA) using molecular dynamics simulations. The results show that the distribution of irradiation defects in NiCoCrFe is relatively scattered, and higher energy irradiation leads to smaller clusters and fewer dislocations. As a result, the mechanical properties of NiCoCrFe decline less when applying tensile stress compared to Ni. These findings demonstrate the radiation resistance of high-entropy alloys and the stability of the mechanical properties of NiCoCrFe under high-energy irradiation.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Construction & Building Technology
K. R. Jaya Sheeba, R. Krishna Priya, Krishna Prakash Arunachalam, Siva Avudaiappan, Erick Saavedra Flores, Pavel Kozlov
Summary: This study explores the potential of Acacia pennata fibers (APFs) treated with benzoyl chloride as reinforcements for construction materials. The study examines the physico-chemical, thermal, and mechanical properties of the fibers to understand their suitability for various applications in the construction industry.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Jikai Zhou, Song Jin, Lu Sun
Summary: The study reveals the significant impact of pore size on the mechanical properties of cementitious materials, especially pores with radii larger than 100 nm. Materials with larger pores tend to exhibit a more pronounced rate effect and higher dynamic increase factor.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
L. X. Meng, D. D. Ben, H. J. Yang, H. B. Ji, D. L. Lian, Y. K. Zhu, J. Chen, J. L. Yi, L. Wang, J. B. Yang, Z. F. Zhang
Summary: This study investigated the effects of single spherical defects on the tensile properties of SLM Ti6Al4V specimens. Different combinations of pore diameters and locations were designed to mimic sub-millimeter defects, showing negligible influence on elastic modulus and tensile strength but noticeable impact on tensile elongation. It was found that the specimens tended to have stochastic elongation to failure with increasing pore size, and fractured at a critical diameter of approximately 1000 μm. Additionally, the location of the embedded pore also influenced ductility, with elongation to failure decreasing as the embedded pore moved closer to the free surface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Chemical
Ying Liu, Xueli Zhao, Weijian Hua, Tongmin Yu, Danyang Zhao, Yifei Jin, Tieli Zhu
Summary: This study systematically investigated the effects of key process parameters on the mechanical properties and microstructures of polymeric parts fabricated through injection molding. The optimal combination of process parameters was obtained through orthogonal experiments, resulting in the successful fabrication of polymeric parts with superior performance.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Girja Mani Aryal, Krishna Prasad Kandel, Ram Kumar Bhattarai, Basant Giri, Menuka Adhikari, Alisha Ware, Shubo Han, Gibin George, Zhiping Luo, Bhoj Raj Gautam, Bhanu Bhakta Neupane
Summary: In this study, multiple material properties of handmade Lokta paper from Nepal were measured and analyzed. The findings revealed that the papers are lightweight with intermediate to high strength, and the tensile strength is significantly higher along the length direction. Features of cellulose, hemicellulose, and lignin were observed in FTIR spectra, and crystalline and amorphous phases were identified in XRD data. Electron microscopy images showed a cross-linked network of fibers contributing to strength and durability.
Article
Materials Science, Textiles
Myoung-Ok Kim, Jung-Soon Lee
FIBERS AND POLYMERS
(2016)
Article
Materials Science, Multidisciplinary
Hyunsik Bang, Ke Ma, Kai Wei, Chang-Yong Kang, Byoung-Suhk Kim, Mayakrishnan Gopiraman, Jung Soon Lee, Ick-Soo Kim
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2016)
Article
Materials Science, Multidisciplinary
Jeong Hwa Kim, Hoik Lee, Abdul Wahab Jatoi, Seung Soon Im, Jung Soon Lee, Ick-Soo Kim
Article
Materials Science, Textiles
Hoik Lee, Abdul Wahab Jatoi, Yamaguchi Kyohei, Kyu-Oh Kim, Kyung Hun Song, Jungsoon Lee, Chunhong Zhu, Hisanaga Tsuiki, Ick Soo Kim
TEXTILE RESEARCH JOURNAL
(2018)
Article
Pharmacology & Pharmacy
Hoik Lee, Gang Xu, Davood Kharaghani, Masayoshi Nishino, Kyung Hun Song, Jung Soon Lee, Ick Soo Kim
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2017)
Article
Materials Science, Multidisciplinary
Kai Wei, Kyu-Oh Kim, Kyung-Hun Song, Chang-Yong Kang, Jung Soon Lee, Mayakrishnan Gopiraman, Ick-Soo Kim
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2017)
Article
Engineering, Chemical
Guohao Yuan, Mayakrishnan Prabakaran, Sun Qilong, Jung Soon Lee, Ill-Min Chung, Mayakrishnan Gopiraman, Kyung-Hun Song, Ick Soo Kim
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2017)
Article
Materials Science, Paper & Wood
Hoik Lee, Masayoshi Nishino, Daewon Sohn, Jung Soon Lee, Ick Soo Kim
Article
Multidisciplinary Sciences
Hoik Lee, Kei Watanabe, Myungwoong Kim, Mayakrishnan Gopiraman, Kyung-Hun Song, Jung Soon Lee, Ick Soo Kim
SCIENTIFIC REPORTS
(2016)
Article
Nanoscience & Nanotechnology
Sana Ullah, Motahira Hashmi, Davood Kharaghani, Muhammad Qamar Khan, Yusuke Saito, Takayuki Yamamoto, Jungsoon Lee, Ick Soo Kim
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2019)
Article
Materials Science, Textiles
Ho Woo Woo, Jung Soon Lee
Summary: This study investigated the antioxidant properties of Aronia melanocarpa fruit extracts and explored the possibility of producing nanofibers by incorporating the extract into polyurethane. The results showed that acidified distilled water extract at a pH of 3 exhibited the highest antioxidant activity. Additionally, by controlling the concentrations of PU and AE, nanofibers with different diameters could be successfully prepared. Furthermore, FT-IR, XRD, and DSC analyses confirmed the interaction between AE and PU, indicating a good mixing of the two components.
FASHION AND TEXTILES
(2021)
Article
Materials Science, Textiles
Jeongwon Mun, Sunhee Lee, YingXing Bian, Jungsoon Lee
Summary: In this study, natural dyeing using turmeric and lac was conducted to evaluate their effectiveness as yellow and red dyes in 3D-printed thermoplastic polyurethane material. The results confirmed the composition of the turmeric and lac extracts and their optimal dyeing conditions. The dyed thermoplastic polyurethane material exhibited high color fastness, indicating the potential usage of these natural dyes in actual production.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Textiles
Mei Xi Chen, Md. Kaiser Haider, Ick Soo Kim, Jung-Soon Lee
Summary: In this study, the total polyphenol content, total flavonoid content, and antioxidant activity of Houttuynia cordata extracted with ethanol and distilled water were analyzed. The results showed that the ethanol extracted Houttuynia cordata had higher total polyphenol content, total flavonoid content, and antioxidant activity than the distilled water extracted Houttuynia cordata. Therefore, the ethanol extracted Houttuynia cordata was used to prepare Houttuynia cordata extract loaded polyurethane (HCE/PU) nanofibers. The addition of Houttuynia cordata extract increased the crystallinity, thermal decomposition temperature, and thermal stability of the HCE/PU nanofibers, which can be attributed to the presence of quercitrin and quercetin crystallite solids in the extract.
FASHION AND TEXTILES
(2023)
Article
Materials Science, Textiles
Myoung Ok Kim, Jung Soon Lee
FASHION AND TEXTILES
(2019)
Article
Chemistry, Multidisciplinary
Ma Ke, Jatoi Abdul Wahab, Bang Hyunsik, Kyung-Hun Song, Jung Soon Lee, Mayakrishnan Gopiraman, Ick Soo Kim