Materials Science Forum最新文献_第10页

Use of Domestic Waste Polyethylene as a Bitumen Modifier in Bituminous Pavement Applications 在沥青路面应用中使用生活垃圾聚乙烯作为沥青改性剂

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-lc2bt4

Mitali Saharia, Kh.Lakshman Singh

{"title":"Use of Domestic Waste Polyethylene as a Bitumen Modifier in Bituminous Pavement Applications","authors":"Mitali Saharia, Kh.Lakshman Singh","doi":"10.4028/p-lc2bt4","DOIUrl":"https://doi.org/10.4028/p-lc2bt4","url":null,"abstract":"The present study evaluated the use of domestic waste polyethylene (PE) in the applications of bituminous pavement. This study investigates the performance of the mixes using different waste PE percentages, i.e., 1%, 2%, 3%, 4% and 5%. It is observed that the softening point and elastic recovery value increase with PE content increases. The penetration index (PI) and temperature susceptibility of binders were evaluated. Adding PE to bitumen shows an improvement in the temperature susceptibility of the modified binders. The Marshall Stability value of bitumen containing 3% PE is higher at 69.65% than virgin binder stability. When 3% PE modified bitumen to the mixes, its indirect tensile strength (ITS) is 70.44 % higher than the conventional mix. The tensile strength ratio (TSR) value improved from 62% (unmodified binder) to 91.18% (modified binder) at 3% PE content, which is 47% higher than the conventional mixture. It indicates that the moisture susceptibility of mixes using PE is higher than conventional mix. Additionally, the mix deformation resistance with 3% PE was found to be 68.75% higher than the mix made with the unmodified binder. The study found that the bituminous mixes using PE have shown higher effectiveness in the properties such as stability, indirect tensile strength, rutting resistance, etc. of the mixes. It indicates that bituminous mixes with modified binders with PE provide higher resistance to permanent deformation.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"23 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140265084","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

Metalworking Technologies and Building Materials 金属加工技术和建筑材料

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/b-9mvw2a

Steven Y. Liang, H. Watari, A. Abioye

引用次数: 0

Processing Maps and Optimized Plastic Behavior Model of TC4 Titanium Alloy Diffusion Bonded Joint at α+β Region Temperatures TC4 钛合金扩散粘接接头在 α+β 区域温度下的加工图和优化塑性行为模型

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-uvb9dt

Can Li, Yong Li, Xiao Xing Li, Dexin Zhang, Imran Sardar Muhammad, Yue Liu

引用次数: 0

Reduction of Surface Cracking for Al-4.6%Mg Strips Cast Surface Using an Unequal-Diameter Twin-Roll Caster by Back-Dam Plate with Lip 使用带唇背坝板的不等径双辊连铸机减少 4.6%Mg 铝带铸造表面裂纹

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-0gcjos

T. Haga, Kazuki Yamazaki, H. Watari, Shinichi Nishida

{"title":"Reduction of Surface Cracking for Al-4.6%Mg Strips Cast Surface Using an Unequal-Diameter Twin-Roll Caster by Back-Dam Plate with Lip","authors":"T. Haga, Kazuki Yamazaki, H. Watari, Shinichi Nishida","doi":"10.4028/p-0gcjos","DOIUrl":"https://doi.org/10.4028/p-0gcjos","url":null,"abstract":"Cracks occur on the surface of Al-Mg strips cast using a high-speed twin-roll caster. Surface cracking of the as-cast strip decreases with decreasing roll load. However, the difficulty of roll casting increases as the roll load is decreased because the strip becomes brittle and is easily broken because the strip is not completely solidified. In the present study, an unequal-diameter twin-roll caster, which is capable of high-speed casting, was used with a lip attached to a back-dam plate in an attempt to decrease surface cracking without deceasing the roll load. The thickness of the solidified layer was found to decrease as the length of the solidified region decreased. The thickness of the solidified layer at the center of the width direction of a strip on the lower roll decreased by shortening the solidification length by a lip attached to a back dam-plate. The solidified layer at the edges was thicker than that inside the cast strip. The thickness of semisolid metal inside the cast strip increased more than that at the edges of the roll bite. The roll load at the width of the lip decreased. The effect of the lip length on surface cracks was investigated.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"129 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140078755","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

Mechanical and Microstructural Behavior of Sintered NiAl-Based High Entropy Alloy 烧结镍铝基高熵合金的力学和微结构行为

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-4mp8t4

E. Olorundaisi, B. Babalola, M. L. Teffo, P. Olubambi

引用次数: 0

Effect of Particle Size and Molarity of Hardening Solution on the Mechanical Properties of New Geopolymeric Mortars Manufactured from Mine Tailings 粒度和硬化溶液摩尔浓度对利用矿山尾矿制造的新型土工聚合物砂浆力学性能的影响

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-jjcux5

C. Palomino-Ñaupa, F. Huamán-Mamani

引用次数: 0

A New Green Solvent: Synthesis and Characterization of Natural-Deep-Eutectic-Solvent (NADES) for Application on Aqueous-Two-Phase System (ATPS) for Extraction of Anthocyanin 新型绿色溶剂：天然深共晶溶剂 (NADES) 的合成与表征：应用于提取花青素的水-两相体系 (ATPS)

Materials Science Forum Pub Date : 2023-12-22 DOI: 10.4028/p-mumd2p

Adityanindran Mahaindran, Xiaon Qin Meng, L. H. Tee, B. L. Chua, Kai Siang Oh

{"title":"A New Green Solvent: Synthesis and Characterization of Natural-Deep-Eutectic-Solvent (NADES) for Application on Aqueous-Two-Phase System (ATPS) for Extraction of Anthocyanin","authors":"Adityanindran Mahaindran, Xiaon Qin Meng, L. H. Tee, B. L. Chua, Kai Siang Oh","doi":"10.4028/p-mumd2p","DOIUrl":"https://doi.org/10.4028/p-mumd2p","url":null,"abstract":"Anthocyanins are said to possess antidiabetic, anticancer, anti-inflammatory, antimicrobial, and anti-obesity effects. There is lot of emphasis placed on the improvement of the methods for extracting anthocyanins; one of which being extraction via aqueous two-phase systems (ATPS). Aqueous two-phase system is a liquid-liquid extraction method that has many benefits like easy to scale up with high recovery yield. However, ATPS also has drawbacks as it utilizes organic solvents and low biodegradability ionic liquid. In this context, Natural Deep Eutectic Solvents (NADESs) which are inexpensive, eco-friendly can be employed in aqueous two-phase system. Thus, the purpose of this research is to explore the feasibility of NADES-ATPS in the extraction and purification of anthocyanins. This research will investigate the solubility of anthocyanins and characterize the NADESs in terms of density, viscosity, and polarity to screen out NADESs that are suitable to be used for the extraction of anthocyanins. To do this, 6 different types of NADES with different molar ration, such as 1:1,1:2 and 1:3 of hydrogen bond acceptor (HBA) to hydrogen bond donor (HBD) ratio, were prepared and screened. The NADES was prepared using choline chloride as HBA, and malonic acid, lactic acid, glycerol, ascorbic acid, urea, and citric acid as HBD. The solubility of 10% anthocyanin was found in a range of 0.60×10−2 g/g to 1.81×10−2g/g. The solubility of the anthocyanins in NADES was correlated to the viscosity and polarity of the NADES where it was seen that the solubility has a positive relationship with polarity. The solubility also showed a similar trend to the viscosity however up to critical point, upon which the solvent was too viscous and was unable to be utilized in room temperature. The research concludes that malonic acid-based NADES to be the most suitable to be utilized for the extraction of anthocyanin using ATPS.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"74 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945407","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

Material Perspective for Hole Transport Material-Free Perovskite Solar Cell: A Mini Review 无空穴传输材料的透镜太阳能电池的材料视角：微型综述

Materials Science Forum Pub Date : 2023-12-22 DOI: 10.4028/p-0pbnie

S. S. Nisa, T. Paramitha, H. Aliwarga, H. Widiyandari, Agus Supriyanto, Rista Tristanti Kisdina, Rifdha Hendianti Kisdina, Nanda Yudi Shofi Subekti, Marcus Saputra

{"title":"Material Perspective for Hole Transport Material-Free Perovskite Solar Cell: A Mini Review","authors":"S. S. Nisa, T. Paramitha, H. Aliwarga, H. Widiyandari, Agus Supriyanto, Rista Tristanti Kisdina, Rifdha Hendianti Kisdina, Nanda Yudi Shofi Subekti, Marcus Saputra","doi":"10.4028/p-0pbnie","DOIUrl":"https://doi.org/10.4028/p-0pbnie","url":null,"abstract":"The technology for converting energy from sunlight (photovoltaic) has entered the third generation. The Perovskite Solar Cell (PSC) can compete with the efficiency of current silicon solar cells. However, from the commercial side, there are still obstacles due to the high price of the hole transport material. This component prevents electrons from being transferred to the anode. It also extracts and transports active layer holes to the electrode. This material can be removed since perovskite material can play a dual role. Perovskite materials can be utilized as light harvesters and hole conductors. However, the absence of one component in the PSC structure certainly affects PSC performance. Therefore, in this review, several developments of hole-transport material-free PSC are discussed regarding the type of material used. It starts from the electron transport layer, perovskite layer, and counter electrode. The TiO2 material is most often used for the electron transport layer because it can achieve a power conversion efficiency (PCE) of >12%. Moreover, with the addition of doping, the PCE value can reach 14.06%. In addition, for the perovskite layer, with a slight modification of the MAPbI3 material, the PCE value is >16%.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"10 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138943875","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

Tensile Properties Characterisation of Hybrid Luffa/GCW Fiber Reinforced Polymer Composite 丝瓜/GCW 纤维增强聚合物混合复合材料的拉伸特性表征

Materials Science Forum Pub Date : 2023-12-22 DOI: 10.4028/p-tw3ujj

Mohd Khairul Afiq, H. Kuan, Mohamad Zaki Hassan

{"title":"Tensile Properties Characterisation of Hybrid Luffa/GCW Fiber Reinforced Polymer Composite","authors":"Mohd Khairul Afiq, H. Kuan, Mohamad Zaki Hassan","doi":"10.4028/p-tw3ujj","DOIUrl":"https://doi.org/10.4028/p-tw3ujj","url":null,"abstract":"Extensive research has been conducted on fiber reinforced polymer (FRP) composites, which have demonstrated superior mechanical properties compared to their individual components. In order to add on to current research trends, the use of ground coffee waste (GCW) and Luffa fibers reinforced polyethylene (PE) composites were fabricated to produce a hybrid natural FRP composite. Tensile testing of the composite indicates that the optimum fiber volume to be between 15% and 35%, as the tensile strength exhibited 9.32 MPa and 8.75 MPa, respectively. Similarly, the tensile modulus of the fabricated composite peaked at 25% with 238 MPa, then declined to 173 MPa at 35%. This indicates that the fibers effectively reinforce the polymer matrix, but once the composite reaches its optimal fiber volume, a decrease in both tensile strength and tensile modulus is observed. The reduction in tensile properties can be attributed to an uneven distribution of load-bearing capacity throughout the composite, as the fibers are no longer able to fully support the matrix once the optimal fiber volume is reached. The specific tensile strength and specific tensile modulus also shows that with the inclusion of Luffa fiber and GCW microfiber contributed to a lighter weight composite. In a nutshell, the hybrid composite fabricated using 25% fiber volume exhibited a tensile strength almost similar to its neat matrix counterpart, though has a noteworthy value in terms of its tensile modulus. The hybrid composite can be as strong in terms of tensile strength, but far more significant in its rigidity, in comparison to the neat polyethylene laminate. Therefore, it showed that the hybrid natural Luffa/GCW FRP has the potential in the engineering industry, such as lightweight furniture, household appliances, automotive parts, and other composite engineering applications.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"9 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138943966","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

Development and Properties Improvement of Tea Dregs-Based Biodegradable Packaging Formulated with Starch and Poly(Lactic Acid) 用淀粉和聚乳酸配制的茶渣基生物降解包装的开发与性能改进

Materials Science Forum Pub Date : 2023-12-22 DOI: 10.4028/p-mptn9p

Sulkhan Windrayahya, Yudi Pranoto, T. Wittaya

{"title":"Development and Properties Improvement of Tea Dregs-Based Biodegradable Packaging Formulated with Starch and Poly(Lactic Acid)","authors":"Sulkhan Windrayahya, Yudi Pranoto, T. Wittaya","doi":"10.4028/p-mptn9p","DOIUrl":"https://doi.org/10.4028/p-mptn9p","url":null,"abstract":"Tea dregs are usually discarded and increase the landfill problem, even though it still contains some fibers that might be used as an alternative fiber source for biodegradable packaging bowl (BPB) production. A novel BPB from tea dregs reinforced with starch and poly (lactic acid) (PLA) was produced in this study by subjecting the mixture to a compression molding with a bowl shape. Tea dregs, starch, and PLA in the ratio of 50:30:20 resulted in the best appearance and highest value of the mechanical properties. Properties improvements with plasticizers, microcrystalline cellulose (MCC), and PLA coating were performed sequentially in the best product ratio, significantly affecting appearance, mechanical, and water absorption properties. Adding sorbitol 5pph, MCC 3pph, and coating with 6% PLA solution improved the product's properties most effectively. These improvements resulted in the best appearance, higher compressive strength, higher hardness value, and lower water absorption. This study concluded that tea dregs could be used as an alternative fiber source in the production of BPB. The addition of plasticizer, MCC, and PLA coating at the optimum concentration can be conducted for the properties improvement of BPB.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"5 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138944817","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