Synthesis and Sintering最新文献_第6页

Examination of water uptake performance and mechanical properties of PLA/flax fiber biocomposites with the coupling agent 偶联剂对聚乳酸/亚麻纤维生物复合材料吸水性能和力学性能的影响

Synthesis and Sintering Pub Date : 2022-04-01 DOI: 10.53063/synsint.2022.22102

A. Avcı, Ayşegul Akdogan Eker, M. Bakkal, M. Bodur

{"title":"Examination of water uptake performance and mechanical properties of PLA/flax fiber biocomposites with the coupling agent","authors":"A. Avcı, Ayşegul Akdogan Eker, M. Bakkal, M. Bodur","doi":"10.53063/synsint.2022.22102","DOIUrl":"https://doi.org/10.53063/synsint.2022.22102","url":null,"abstract":"The paper reports, the effect of water sorption on the microstructural and flexural properties of the flax fiber/ polylactic acid (PLA) biocomposites compared to the composites with maleic anhydride (MAH) as coupling agents and alkali treatment. In the current study, five different biocomposites which are 15 % wt. flax/PLA, 25 % wt. flax/PLA as control group and15 % wt. flax/PLA, 25 % wt. flax /PLA, and 35% wt. flax / PLA with 5 % wt. MAH was produced. Ten different soaking times were studied to understand the water absorption behavior of the biocomposites. To investigate mechanical properties of the biocomposites impact test was applied on the dry and 750 h, 1850 h water sorption composites. A three-point bending test was performed on the dry and 1850 h water sorption biocomposites to determine flexural properties. Short flax fiber-reinforced PLA matrix biocomposites were compounded using extrusion and manufactured by injection molding. Flax fiber surface was treated using sodium hydroxy solution to advance the interface interaction between fiber-matrix and surface performance of the fiber and matrix. According to the results, alkali treatment improved the water gain resistance of the composites since its enhancement of the interfacial bonding. Alkali-treated composites with maleic anhydride showed the better impact and flexural strength than composites without alkali-treated after 1850 h water sorption.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73778440","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: 1

Recent advances in hydrogen production using MXenes-based metal sulfide photocatalysts mxenes基金属硫化物光催化剂制氢研究进展

Synthesis and Sintering Pub Date : 2022-03-29 DOI: 10.53063/synsint.2022.21106

Asieh Akhoondi, H. Ghaebi, L. Karuppasamy, Mohammed M. Rahman, P. Sathishkumar

{"title":"Recent advances in hydrogen production using MXenes-based metal sulfide photocatalysts","authors":"Asieh Akhoondi, H. Ghaebi, L. Karuppasamy, Mohammed M. Rahman, P. Sathishkumar","doi":"10.53063/synsint.2022.21106","DOIUrl":"https://doi.org/10.53063/synsint.2022.21106","url":null,"abstract":"At present, the composition and crystalline structure of transition metal nitrides or carbides (MXenes) and their derivatives are continuously expanding due to their unique physicochemical properties, especially in the photocatalytic field. Advances over the past four years have led to improved preparation of new MAX phases, resulting in new MXenes with excellent photo-thermal effect, considerable specific surface area, long-term stability and optimum activity. Since MXenes have good electrical conductivity and their bandgap is adjustable under the visible light range, this group is one of the best promising candidates for hydrogen production from photo-splitting of water as an environment-friendly method of converting sunlight to chemical energy. Progress in noble metal-free photocatalyst associated with more understanding of the fundamental mechanism of photocatalysis has enabled a proper choice of cocatalyst with better efficiency. In this study, the photocatalytic production of hydrogen through MXens as a support and co-catalyst on metal sulfide is summarized and discussed. Recent advances in the design and synthesis of MXenes-based metal sulfide nanocomposites to increase the efficiency of photocatalytic hydrogen production are then highlighted. Finally, the challenges and future prospects for the development of MXenes-based metal sulfide composites are outlined.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90374108","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: 6

Oxidation-affected zone in the sintered ZrB2–SiC–HfB2 composites 烧结ZrB2-SiC-HfB2复合材料的氧化影响区

Synthesis and Sintering Pub Date : 2022-03-26 DOI: 10.53063/synsint.2022.21111

E. Dodi, Z. Balak, Hosein Kafashan

引用次数: 4

Performance of glucose, sucrose and cellulose as carbonaceous precursors for the synthesis of B4C powders 葡萄糖、蔗糖和纤维素作为碳质前驱体合成B4C粉末的性能

Synthesis and Sintering Pub Date : 2022-03-25 DOI: 10.53063/synsint.2022.21108

Seyed Faridaddin Feiz, L. Nikzad, H. Majidian, E. Salahi

引用次数: 3

Role of Ti3AlC2 MAX phase on characteristics of in-situ synthesized TiAl intermetallics. Part III: microstructure Ti3AlC2 MAX相对原位合成TiAl金属间化合物性能的影响第三部分:微观结构

Synthesis and Sintering Pub Date : 2022-03-20 DOI: 10.53063/synsint.2022.2182

M. Akhlaghi, E. Salahi, S. A. Tayebifard, G. Schmidt

{"title":"Role of Ti3AlC2 MAX phase on characteristics of in-situ synthesized TiAl intermetallics. Part III: microstructure","authors":"M. Akhlaghi, E. Salahi, S. A. Tayebifard, G. Schmidt","doi":"10.53063/synsint.2022.2182","DOIUrl":"https://doi.org/10.53063/synsint.2022.2182","url":null,"abstract":"In this paper, the 3rd part of a series of publications on the sinterability and characteristics of TiAl–Ti3AlC2 composites, the microstructure development during the synthesis and sintering processes was studied by scanning electron microscopy (SEM). Chemical evaluation of various phases in the developed microstructures was performed using energy-dispersive X-ray spectroscopy (EDS) in different ways such as point, line scan and two-dimensional elemental map analyses. For this purpose, five samples were fabricated with different percentages of Ti3AlC2 MAX phase additive (10, 15, 20, 25 and 30 wt%). Ball-milling and spark plasma sintering (SPS: 900 °C/7 min/40 MPa) of as-purchased Al and Ti powders with already-synthesized Ti3AlC2 additive were selected as composite making methodology. SEM/EDS analyses verified the in-situ manufacturing of TiAl/Ti3Al intermetallics as the matrix during the SPS process and the presence of Ti3AlC2 as the ex-situ added secondary phase. Moreover, the in-situ synthesis of Ti2AlC, another member of MAX phases in Ti-Al-C system, was also detected in titanium aluminide grain boundaries and attributed to a chemical reaction between TiC (an impurity in the initial Ti3AlC2 additive) and TiAl components.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83401885","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: 2

Impact of bridging oxygens formation on optical properties of Fe3+ doped Li2O–Al2O3–SiO2–TiO2 glasses 桥氧形成对Fe3+掺杂Li2O-Al2O3-SiO2-TiO2玻璃光学性能的影响

Synthesis and Sintering Pub Date : 2022-03-13 DOI: 10.53063/synsint.2022.2179

A. Faeghinia

引用次数: 0

Molecular hydrogen production by radiolysis of water on the surface of nano-ZrO2 under the influence of gamma rays 伽玛射线作用下纳米zro2表面水的辐射解氢研究

Synthesis and Sintering Pub Date : 2022-02-19 DOI: 10.53063/synsint.2022.21105

G. Imanova

引用次数: 4

Synthesis and sintering of Fe-32Mn-6Si shape memory alloys prepared by mechanical alloying 机械合金化制备Fe-32Mn-6Si形状记忆合金的合成与烧结

Synthesis and Sintering Pub Date : 2022-02-07 DOI: 10.53063/synsint.2022.2185

A. Shamsipoor, Babak Mousavi, M. Shakeri

{"title":"Synthesis and sintering of Fe-32Mn-6Si shape memory alloys prepared by mechanical alloying","authors":"A. Shamsipoor, Babak Mousavi, M. Shakeri","doi":"10.53063/synsint.2022.2185","DOIUrl":"https://doi.org/10.53063/synsint.2022.2185","url":null,"abstract":"Fe-32Mn-6Si alloy was produced using the mechanical alloying (MA) process of high purity powders under an inert argon gas atmosphere. The aim of this investigation is the in-depth study of the microstructure and phase transformation during the milling-sintering process of Fe-32Mn-6Si shape memory alloys. During the milling process, a significant amount of amorphous phase was created as well the crystalline martensite and austenite phases. The amorphous phase was increased by milling time enhancement and then it was decreased due to the mechano-crystalization phenomenon. It was detected that the microhardness of the alloyed powder directly depends on the amount of the amorphous phase. Furthermore, the particle size of as-milled powder firstly decreased and then increased, when the amorphous phase cojoined gradually during the milling process the transformation of martensite into austenite. The lattice strain was increased considerably during the milling process which was a reason for martensite phase creation resulting in the high shape memory properties. The amount of pre-strain for Fe-32Mn-6Si alloy was calculated to be 3.3%. Furthermore, the optimum sintering temperature was approved to be 950 °C by reduction of the percentage of pores and suitable densification.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75143085","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: 1

Sol-gel zinc oxide nanoparticles: advances in synthesis and applications 溶胶-凝胶氧化锌纳米颗粒:合成与应用进展

Synthesis and Sintering Pub Date : 2021-12-29 DOI: 10.53063/synsint.2021.1477

Parisa Shafiee, Mehdi Reisi Nafchi, Sara Eskandarinezhad, S. Mahmoudi, E. Ahmadi

{"title":"Sol-gel zinc oxide nanoparticles: advances in synthesis and applications","authors":"Parisa Shafiee, Mehdi Reisi Nafchi, Sara Eskandarinezhad, S. Mahmoudi, E. Ahmadi","doi":"10.53063/synsint.2021.1477","DOIUrl":"https://doi.org/10.53063/synsint.2021.1477","url":null,"abstract":"Zinc oxide nanoparticles (ZnO) exhibit numerous characteristics such as biocompatibility, UV protection, antibacterial activity, high thermal conductivity, binding energy, and high refractive index that make them ideal candidates to be applied in a variety of products like solar cells, rubber, cosmetics, as well as medical and pharmaceutical products. Different strategies for ZnO nanoparticles’ preparation have been applied: sol-gel method, co-precipitation method, etc. The sol-gel method is an economic and efficient chemical technique for nanoparticle (NPs) generation that has the ability to adjust the structural and optical features of the NPs. Nanostructures are generated from an aqueous solution including metallic precursors, chemicals for modifying pH using either a gel or a sol as a yield. Among the various approaches, the sol-gel technique was revealed to be one of the desirable techniques for the synthesis of ZnO nanoparticles. In this review, we explain some novel investigations about the synthesis of zinc oxide nanoparticles via sol-gel technique and applications of sol-gel zinc oxide nanoparticles. Furthermore, we study recent sol-gel ZnO nanoparticles, their significant characteristics, and their applications in biomedical applications, antimicrobial packaging, drug delivery, semiconductors, biosensors, catalysts, photoelectron devices, and textiles.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74521384","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: 7

Hydrogen evolution via noble metals based photocatalysts: A review 贵金属基光催化剂析氢研究进展

Synthesis and Sintering Pub Date : 2021-12-29 DOI: 10.53063/synsint.2021.1468

Asieh Akhoondi, Anirudh Sharma, D. Pathak, M. Yusuf, T. Demissie, R. Guo, Adnan Ali

{"title":"Hydrogen evolution via noble metals based photocatalysts: A review","authors":"Asieh Akhoondi, Anirudh Sharma, D. Pathak, M. Yusuf, T. Demissie, R. Guo, Adnan Ali","doi":"10.53063/synsint.2021.1468","DOIUrl":"https://doi.org/10.53063/synsint.2021.1468","url":null,"abstract":"In recent decades, the use of photocatalysts in the evolution of hydrogen (H2) has received much attention. However, the use of the well-known titanium oxide and another photocatalyst as a base for noble metals is limited due to their major weakness in electron-hole pair separation. The use of cocatalysts can be a good way to overcome this problem and provide better performance for the evolution of hydrogen. In this review, suitable high-efficiency cocatalysts for solar hydrogen production have been thoroughly reviewed. New strategies and solutions were examined in terms of increasing the recombination of charge carriers, designing reactive sites, and enhancing the wavelengths of light absorption. Several new types of cocatalysts based on semiconductors in noble groups and dual metals have been evaluated. It is expected that these photocatalysts will be able to reduce the activation energy of reaction and charge separation. In this regard, the existing views and challenges in the field of photocatalysts are presented. The characteristics of monoatomic photocatalysts are reviewed in this manuscript and the latest advances in this field are summarized. Further, the future trends and upcoming research are also briefly discussed. Finally, this review presents noble metal-based photocatalysts for providing suitable photocatalysts on a larger scale and improving their applicability.","PeriodicalId":22113,"journal":{"name":"Synthesis and Sintering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80037477","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: 7