Key Engineering Materials最新文献_第2页

Effect of Mercerization on Mechanical Properties of Grewia Optiva Natural Fiber Polymer Composites 丝光处理对 Grewia Optiva 天然纤维聚合物复合材料机械性能的影响

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-bji4ez

S. Chauhan, P. C. Gope

{"title":"Effect of Mercerization on Mechanical Properties of Grewia Optiva Natural Fiber Polymer Composites","authors":"S. Chauhan, P. C. Gope","doi":"10.4028/p-bji4ez","DOIUrl":"https://doi.org/10.4028/p-bji4ez","url":null,"abstract":"The concerns towards sustainable development have triggered the need of adopting biodegradable products in different applications. The natural fibers are being widely explored in the field of composites for various applications. Sustainable architecture is also seeking the research and development of new materials to minimize the negative environmental effect of the traditional structural materials. A bast fiber obtained from Grewia Optiva (G.O.) tree is abundantly available in the sub-Himalayan terrains and is still underutilized in the field of biocomposites. The promotion of G.O. fiber in fabrication of biocomposites may give a source of income and employment to rural hilly populations. This research work utilizes the G.O. fiber collected from the Okhalkanda block of Nainital district of Uttarakhand to develop biocomposites. The effect of mercerization on the water absorption behavior and mechanical properties has been also studied. It is found that the treatment of fibers with NaOH reduces the water absorption tendency of G.O. Natural Fiber Reinforced Biocomposites (NFRB) upto 41.05% and the mechanical properties are also improved by appreciable amount. The tensile and flexural strength obtained are 141.45 MPa and 109.84 MPa respectively for mercerized fiber reinforcement. Impact strength and mode-I fracture toughness have been recorded as 11.97 KJ/m2 and 1.85 MPa√m respectively. SEM images of fractured surfaces indicate good bonding of mercerized fibers as compared to untreated fibers with epoxy matrix. Hence the Grewia Optiva biocomposites have potential to be used in different architectural applications like wall panels, false ceilings, doors, windows, etc.","PeriodicalId":507685,"journal":{"name":"Key Engineering Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140979331","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

Comparative Review of Mechanical Properties of Rice Straw and RiceHusk Fiber Reinforced Polymer Composite 稻草和稻壳纤维增强聚合物复合材料力学性能对比综述

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-93j3hv

D. Patel, Sachin Kumar, Hari Om Sharma, S. Kumar

引用次数: 0

Determining the Properties of Unfired Stabilized Kaolinitic Clay Brick for Sustainable Construction 确定用于可持续建筑的未烧制稳定高岭土粘土砖的特性

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-05qmwb

S. Odeyemi, Abdulqudus Adeyanju Adegun, Michael Oluwasegun Adisa

{"title":"Determining the Properties of Unfired Stabilized Kaolinitic Clay Brick for Sustainable Construction","authors":"S. Odeyemi, Abdulqudus Adeyanju Adegun, Michael Oluwasegun Adisa","doi":"10.4028/p-05qmwb","DOIUrl":"https://doi.org/10.4028/p-05qmwb","url":null,"abstract":"Kaolin is one of the most vital industrial minerals whose application is reliant on its chemistry and structural makeup. This research attempts to determine the properties of unfired kaolinitic clay bricks for sustainable construction. Samples of the material were pre-treated and analyzed to obtain their physical and refractory properties, such as chemical composition, microstructure, moisture content, dry density, linear shrinkage, plastic index, and crushing strength. The results revealed that the clay comprises high percentages of silicon and alumina oxides being 75.6% and 17.0% of the total oxide composition respectively. The clay also contained some residual impurities in the form of metallic oxides i.e., oxides of iron, sodium, calcium, potassium, manganese, and lead. Characterization tests on the clay presented a specific gravity of 2.66, liquid limit of 38, plastic limit of 25.9, and plasticity index of 12.1 which classifies the clay as low-plasticity clay based on the Unified Soil Classification System. The river sand used was distributed between 0.06 – 3 mm falling within the category of medium and fine sand. The aggregate fineness modulus was obtained as 3.03%. The coefficient of uniformity was lower than 4.0 and thus classified as being uniformly graded. Stabilization of the clay with sand and lime resulted in decreased compression and flexural strength but increased durability. The results imply that kaolinitic clay can be used in an unfired form for earth construction.","PeriodicalId":507685,"journal":{"name":"Key Engineering Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140978882","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

Thermal Cycle Simulation of Heat Affected Zone in the Welded Mild Steel 焊接低碳钢热影响区的热循环模拟

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-4rswbo

I. Hamdi, Z. Boumerzoug, Oualid Bedjaoui, W. Melik, F. Delaunois

引用次数: 0

A Comparative Study on the Synthesis of Type NaX Zeolite Prepared from Kaolin for Builder Application in Detergent Production 以高岭土为原料合成 NaX 型沸石并将其应用于洗涤剂生产的比较研究

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-lvxdd1

I. Ekpe, H. Mgbemere, Lawal Ganiyu, Henry Ovri, Anna Lisa Sargent, Obioha Charles

{"title":"A Comparative Study on the Synthesis of Type NaX Zeolite Prepared from Kaolin for Builder Application in Detergent Production","authors":"I. Ekpe, H. Mgbemere, Lawal Ganiyu, Henry Ovri, Anna Lisa Sargent, Obioha Charles","doi":"10.4028/p-lvxdd1","DOIUrl":"https://doi.org/10.4028/p-lvxdd1","url":null,"abstract":"Zeolites being used as builders in detergents are synthesized from expensive chemicals with a cumbersome production process. In this study, zeolite was synthesized from cheaper and readily available kaolin for possible use in detergent production. Kaolin from two sources namely Ajebo, Ogun State and Darazo, Bauchi State, Nigeria was used as starting materials while wet beneficiation followed by acid leaching was used to purify the kaolin and hydrothermal process was used to synthesize the zeolite. The chemical analysis confirms the presence of silica and alumina which are the precursors materials for zeolite synthesis. An increase in the amounts of the desired silica and alumina for both kaolin accompanied by a reduction in the amounts of the undesired oxides present in the kaolin as impurities are clear indications that the acid leaching was successful. The zeolites synthesized from both kaolin shows better water adsorption capacity and ion exchange capacity compared to those reported for zeolite synthesized from pure chemicals, this ability makes zeolite more suitable for the production of detergent. These results are indications that zeolites synthesized from kaolin can serve as a possible replacement for the more expensive zeolite synthesized from chemicals used as builders in detergent production.","PeriodicalId":507685,"journal":{"name":"Key Engineering Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140980068","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

Evaluation of the Use of Adhesive Tape in Laser Welded Ultra-High-Strength Steel Lap Joints 评估在激光焊接超高强度钢搭接接头中使用胶带的情况

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-a9bpem

M. Hietala, M. Keskitalo, A. Järvenpää

引用次数: 0

Optimization, Sodium Hydroxide and Plantain Fibres: Mechanical Properties of Unsaturated Polyester Composites for Transtibial Prosthetic Socket 优化、氢氧化钠和车前草纤维：用于经胫骨假体插座的不饱和聚酯复合材料的力学性能

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-gx7c9i

C. O. Nwaiwu, Jervas Ekezie, O. T. Azeez, Ada, J., Daniel, Oluchi Blessing Igbokwe, Magdalene Nkeiru Akanbi

{"title":"Optimization, Sodium Hydroxide and Plantain Fibres: Mechanical Properties of Unsaturated Polyester Composites for Transtibial Prosthetic Socket","authors":"C. O. Nwaiwu, Jervas Ekezie, O. T. Azeez, Ada, J., Daniel, Oluchi Blessing Igbokwe, Magdalene Nkeiru Akanbi","doi":"10.4028/p-gx7c9i","DOIUrl":"https://doi.org/10.4028/p-gx7c9i","url":null,"abstract":"Low mechanical behaviors of natural fibres in the reinforcement of polymer composites have remain an issue of concern. This study is aimed at investigating the effect of NaOH treatment on the mechanical properties of plantain fiber for the transtibial prosthetic sockets made of polyester resin. Plantain fiber was extracted from the plantain bast using water retting techniques. The fibres were modified using alkaline treatment method of 5 – 25% for variable time of 30 to 150 minutes. It was optimized using 3-level Factorial design (3-LCD) of response surface methodology based on tensile properties of treated fibres. The polyester composites of plantain and glass fibers were prepared using hand-layup techniques. Instron Universal testing machine-3369 model was used to determine the tensile and impact properties of fibers and polyester composites. Rockwell hardness tester-RBHT/S-39 model was used to determine the hardness property. The optimum process conditions of 5 % NaOH for 119 minutes improved plantain fiber tensile strength, modulus, strain, energy, and extension by improved by 102.03, 208.07, 9.70, 210.52 and 205.73 %, respectively. The ultimate tensile strength and modulus was obtained at 10 and 12.5% fiber loading. The hardness and impact strength of NaOH modified unsaturated polyester composites was marginally more than 3.51 and 10.69% of glass fiber reinforced unsaturated composites, respectively, at 12.5% fiber loading. FTIR analysis revealed the improvement in mechanical properties. Thus, NaOH modified plantain fiber unsaturated polyester composites serves as a better alternative for making transtibial prosthetic socket.","PeriodicalId":507685,"journal":{"name":"Key Engineering Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140979721","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

Structural and Functional Advanced Materials 结构性和功能性先进材料

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/b-k2h7ue

Cecilia Poletti, J. M. Torralba

引用次数: 0

Eggshells Utilisation in Polymer Composites 蛋壳在聚合物复合材料中的应用

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-8o3v3t

Sachin Kumar, D. Patel, Hari Om Sharma, S. Kumar

引用次数: 0

Preparation of Silane-Treated Eggshells Polyvinyl Chloride Films by Co-Precipitation: Effect of Vinyltrimethoxysilane Surface Treatment on the Tensile Properties 用共沉淀法制备硅烷处理过的蛋壳聚氯乙烯薄膜：乙烯基三甲氧基硅烷表面处理对拉伸性能的影响

Key Engineering Materials Pub Date : 2024-05-14 DOI: 10.4028/p-gl3hot

D. Kiryakova, Ganka Kolchakova

引用次数: 0