Materials Science Forum最新文献

Study of the Potential of Typha Domingensis Fibers as Reinforcement for Composite Materials 蒲草纤维增强复合材料的潜力研究

Materials Science Forum Pub Date : 2026-01-28 DOI: 10.4028/p-z8kogw

Gollé Diouf, Arnaud Magnien, M. Sarr, Christophe Herbelot, Abdelatif Imad

{"title":"Study of the Potential of Typha Domingensis Fibers as Reinforcement for Composite Materials","authors":"Gollé Diouf, Arnaud Magnien, M. Sarr, Christophe Herbelot, Abdelatif Imad","doi":"10.4028/p-z8kogw","DOIUrl":"https://doi.org/10.4028/p-z8kogw","url":null,"abstract":"This study investigates the potential of typha domingensis fibers to be used as reinforcement in composite materials. Morphological, mechanical, and thermal analyses were conducted on fibers extracted from leaves and stems using various methods. The leaf fibers (LNF-00, LRD-41, LRS-41), with transverse dimensions ranging between 185 to 244 µm, were on average 48% thinner than stem fibers (SNF-00, SRD-20, SRS-20), whose transverse dimensions ranged from 305 to 334 µm. Transverse dimensions variations were most pronounced for fibers retted in distilled water (65%), followed by those retted in seawater (47%) and mechanically processed fibers (37%). Stem fibers subjected to seawater retting (SRS-20) exhibited less dispersion in mechanical properties, with a Young’s modulus of 2.2 GPa and a tensile strength of 55.9 MPa. Overall, leaf fibers outperformed stem fibers, with average increases of 38, 60, and 31% for Young’s modulus, tensile strength, and elongation at failure, respectively. Finally, thermal analysis revealed that fibers retted in distilled water provided the highest thermal stability, attributed to a reduction in lignin and hemicelluloses.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"1177 1","pages":"55-67"},"PeriodicalIF":0.0,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147381800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Luminescence of Novel O-Phenanthroline-Acyl Amino Acid Rare Earth Praseodymium Complexes 新型邻菲罗啉-酰基氨基酸稀土镨配合物的制备与发光研究

Materials Science Forum Pub Date : 2025-11-07 DOI: 10.4028/p-hnni7j

Zi Hao Qiu, Gerile Naren, Rui Meng, Rui Liang, Zi-Nan Chen

{"title":"Preparation and Luminescence of Novel O-Phenanthroline-Acyl Amino Acid Rare Earth Praseodymium Complexes","authors":"Zi Hao Qiu, Gerile Naren, Rui Meng, Rui Liang, Zi-Nan Chen","doi":"10.4028/p-hnni7j","DOIUrl":"https://doi.org/10.4028/p-hnni7j","url":null,"abstract":"The o-phenanthroline-acyl-amino acid praseodymium complex (Pr [CH 3 (CH 2 ) 4 CO NHC H(CH 3 )COO] 3 ꞏphen) has been synthesized by an in-solution chemical reaction method using H(hex-ala) and 1,10-phenanthroline (phen) as ligands with a view to obtaining rare-earth organic complexes with good optical properties. The molecular structure of the praseodymium complex was determined using CHN elemental analysis, 13 C NMR testing, and FT-IR spectroscopic testing. We also perform wide-angle and small-angle XRD diffraction wave analysis, polarization microscopy observation, light absorption testing, fluorescence spectral analysis, fluorescence lifetime analysis, and fluorescence variable temperature spectral analysis. The results indicate that the introduction of the auxiliary ligand phen results in a periodic short-range ordered structure and better crystallinity of Pr (hex-ala) 3 ꞏphen, which exhibits strong optical anisotropy in the molten state. Good light absorption in the UV-visible region (200 nm - 420 nm), switching from ligand luminescence to a rare earth centered luminescence mechanism, and photoluminescence shifting from the blue to the green region. High fluorescence intensity in the visible and near-infrared regions, good fluorescence lifetime (0.76 µs), and good thermal stability in the range of 25 °C - 200 °C.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"1167 1","pages":"71-80"},"PeriodicalIF":0.0,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147889657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silicon from Shoda-Kedela (Georgia) Quartz Deposition Shoda-Kedela （Georgia）石英沉积的硅

Materials Science Forum Pub Date : 2025-11-06 DOI: 10.4028/p-m9y8k2

Tengiz Qamushadze, Korneli Svanidze, Gocha Kurdadze, Elza Khutsishvili, Nana Kobulashvili, Marina Chumbadze

引用次数: 0

Stable Fabrication of Chitosan/Polycaprolactone (CS/PCL) Core-Shell Nanofibers by Electrospinning 静电纺丝稳定制备壳聚糖/聚己内酯（CS/PCL）核壳纳米纤维

Materials Science Forum Pub Date : 2024-12-18 DOI: 10.4028/p-pf2lep

Ha Tran Phuong, Duyen Nguyen Thu, Nguyen Thanh Liem, Vu Anh Doan

{"title":"Stable Fabrication of Chitosan/Polycaprolactone (CS/PCL) Core-Shell Nanofibers by Electrospinning","authors":"Ha Tran Phuong, Duyen Nguyen Thu, Nguyen Thanh Liem, Vu Anh Doan","doi":"10.4028/p-pf2lep","DOIUrl":"https://doi.org/10.4028/p-pf2lep","url":null,"abstract":"Chitosan (CS), with its non-toxic and antibacterial properties, and Poly(ε-caprolactone) (PCL), known for its biodegradability and biocompatibility, are crucial materials in medical applications. This study proposed a solution utilizing electrospinning to manufacture fibers with nanometer-sized core-shell structures from these materials, with CS serving as the fiber core and PCL forming the shell. The influence of manufacturing technology parameters on fiber size and morphology was thoroughly researched and investigated. The solvent system used, Chloroform/Dimethylformamide (DMF), ensured complete solubility, viscosity control, conductivity, and proper solvent evaporation. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) results clearly demonstrated the morphology and internal structure of the nanofibers. The water contact angle (WCA) measurements of the fiber membrane showed almost no significant change over time, indicating strong hydrophobicity of the nanofibers. Additionally, the FTIR spectrum revealed distinct core-shell layers without any blending between them, while DSC analysis showed the thermal properties of fiber membranes. In summary, the electrospinning of nanofibers proved to be stable, producing thin fibers with an average diameter of approximately 400 nm. These findings are expected to significantly enhance the applicability of CS/PCL nanofibers across various fields, including healthcare and smart agriculture.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"1139 1","pages":"107-114"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147877700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction of a Binary Organocatalytic System Based on Urea-Based Hydrogen Bond Donors and Polyether Ionic Liquids and its Application to CO<sub>2</sub> Cycloaddition Reactions 基于脲基氢键给体和聚醚离子液体二元有机催化体系的构建及其在CO&lt；sub>2</sub&gt；环加成反应中的应用

Materials Science Forum Pub Date : 2024-12-17 DOI: 10.4028/p-txk48h

Ya Ya Wang, Xin Jin

引用次数: 0

Study of the Physic-Mechanical Properties of a Typha Concrete Composites: A Possible New Material for Sustainable Construction 香蒲混凝土复合材料的物理力学性能研究：一种可能用于可持续建筑的新材料

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-bxp2lf

El Moustapha Elhaj-Maham, Babacar Diouf, El Hadji Babacar Ly, Moise Manga

{"title":"Study of the Physic-Mechanical Properties of a Typha Concrete Composites: A Possible New Material for Sustainable Construction","authors":"El Moustapha Elhaj-Maham, Babacar Diouf, El Hadji Babacar Ly, Moise Manga","doi":"10.4028/p-bxp2lf","DOIUrl":"https://doi.org/10.4028/p-bxp2lf","url":null,"abstract":"Natural fibers have garnered considerable attention from researchers and academics alike due to their eco-friendly nature and sustainability. These fibers are being explored for their potential use in polymer composites. The use of natural fiber-reinforced polymer composite materials is rapidly increasing in both industrial and fundamental research applications due to their renewable, low, and biodegradable properties. In order to reduce the CO2 emissions, the building energy consumption and preserve the natural sand. The present study involved conducting an analysis of the results obtained from the experimental investigation where five mixtures of typha fiber sand, and cement (MHC0, MHC5, MHC10, MHC15 and MHC20)) were utilized to make Typha-concrete. The experimental mixtures being examined and the results indicate that the density of the samples diminishes in proportion to the incorporation of typha fiber, while the thermal conductivity is enhanced. In addition, the characteristics of lightweight structures can be attributed to the generated specimens, which have been determined by their documented compressive strength. Based on the results of RILEM's functional classification analysis, it can be concluded that Typha-concrete meets the mechanical and thermal requirements of construction materials, making it a feasible option for both structural and insulating concrete applications.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"44 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141113522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Bleaching Variation on Schoutenia Ovata Korth Fiber as a Composite Reinforcement 漂白变化对作为复合材料增强材料的 Schoutenia Ovata Korth 纤维的影响

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-55sktf

A. Andoko, Riduwan Prasetya

引用次数: 0

Parameter Design of Sand Casting to Minimize Shrinkage Defects, Porosity Defects and Incomplete Defects 最小化收缩缺陷、孔隙缺陷和不完整缺陷的砂型铸造参数设计

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-ck89wq

Syah Rizal Muzaqqi, S. Suprayitno, Y. Pradana

{"title":"Parameter Design of Sand Casting to Minimize Shrinkage Defects, Porosity Defects and Incomplete Defects","authors":"Syah Rizal Muzaqqi, S. Suprayitno, Y. Pradana","doi":"10.4028/p-ck89wq","DOIUrl":"https://doi.org/10.4028/p-ck89wq","url":null,"abstract":"Casting is one of the most commonly used manufacturing method for geometrically complex product. Among the casting technologies, sand casting is often found in application. Beside the advantages of the sand-casting process, it also has a drawback that is often encountered, namely product defects. Product defects can be caused by a lack of attention to sand casting parameters. This work aims to minimize those defects, including porosity defects, shrinkage defects and incomplete defects by optimizing process parameters using the Taguchi method. The identified sand-casting process parameters include gating location, riser location, molding conditions and pouring temperature with each parameter consisting of 3 levels. This research using the fractional factorial L9 (34). Data processing is carried out by analysis of mean (ANOM) to obtain plot effects. The results showed that the optimal combination of parameters that resulted in shrinkage, porosity and minimal incomplete defects were at gating location level 2, riser location level 1, mold condition level 2 and pouring temperature level 3. The results of the comparison before and after optimization were an increase of 0.77, where previously it was 1.30 to 2.07 based on normalized data.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141113882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing Micro Friction Stir Spot Welding (mFSSW) of Aluminum Alloy AA1100 Using Neural Network Model 利用神经网络模型优化铝合金 AA1100 的微摩擦点焊 (mFSSW)

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-bbosi6

Tri Haryanto Soleh Atmaja, L. A. Safitri, P. Rupajati, A. Baskoro

{"title":"Optimizing Micro Friction Stir Spot Welding (mFSSW) of Aluminum Alloy AA1100 Using Neural Network Model","authors":"Tri Haryanto Soleh Atmaja, L. A. Safitri, P. Rupajati, A. Baskoro","doi":"10.4028/p-bbosi6","DOIUrl":"https://doi.org/10.4028/p-bbosi6","url":null,"abstract":"This study explores the optimization of Micro Friction Stir Spot Welding (mFSSW) by investigating the influence of tool profiles on welding outcomes, using aluminum alloy AA1100 with a 0.42 mm thickness as the specimen material. Monitoring temperature and RPM during welding with thermocouples and tachometers, mechanical properties are assessed through tensile shear tests, microhardness measurements, and macrostructural observations. The findings serve as the basis for developing Neural Network models using Rapidminer software, marking a transformative development that positions Neural Networks as potent tools for optimizing welding processes, potentially leading to achieving optimal weld quality. The investigation also delves into three welding tool configurations – the two-stage pin, one-stage pin, and pinless mFSSW probes – highlighting their distinct impacts on tensile shear test values and overall welding quality. Notably, the two-stage pin configuration emphasizes the significance of larger pin diameters and controlled heat generation for enhanced weld strength, while the one-stage pin configuration underscores the pivotal role of pin diameter and elevated temperatures in improving weld quality. The pinless mFSSW probe configuration, on the other hand, emphasizes the importance of shoulder diameter and temperature control for superior tensile shear test results. Leveraging Neural Network modeling for optimization, this study advances our understanding of parameter interactions and underscores the efficacy of Neural Networks in achieving superior tensile shear test values and welding quality in mFSSW, offering valuable insights for future endeavors in the field..","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"1 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141114464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hardness and Microstructure of TiN Coating on Aluminum Alloy with DC Sputtering 铝合金直流溅射 TiN 涂层的硬度和微观结构

Materials Science Forum Pub Date : 2024-05-21 DOI: 10.4028/p-2clvvz

Margono Margono, D. Darmadi, T. D. Widodo, Suprapto Suprapto, T. Sujitno, Muhammad Kozin

引用次数: 0