Materials Science Forum最新文献_第7页

Curing Kinetics of Epoxy Adhesive by Non-Isothermal DSC 利用非等温 DSC 分析环氧树脂粘合剂的固化动力学

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-e5vlmg

Wiwiek Utami Dewi, Rizky Sutrisna, Heru Supriyatno, S. Astutiningsih, Mochamad Chalid

引用次数: 0

The Performance Study of Microstrip Patch Antenna Made of Polyurethane - Oil Palm Empty Fruit Bunch Composite 聚氨酯-油棕空果束复合材料制成的微带贴片天线的性能研究

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-qch4ro

Syarifah Norsuhaila binti Syed Mahmud, Nur Iffah Zulaikha binti Azman, N. Salim, Kok Yeow You, M. Jusoh

引用次数: 0

The Effect of Lotus Root Starch Content on the Water Barrier Properties and Biodegradability of Cassava Bioplastic Films 莲藕淀粉含量对木薯生物塑料薄膜阻水性能和生物降解性的影响

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-29ugkz

Muhammad Iezwan Izuddin Abdullah, Wan Zarina Wan Mohamed

引用次数: 0

Dissolving Pulp from Sansevieria Trifasciata Fiber Processed with Water-Pre-Hydrolysis, Soda-Anthraquinone Cooking and Clorine Free Bleaching 采用水预水解、苏打-蒽醌蒸煮和无氯漂白工艺加工的三叶草纤维溶解纸浆

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-1p8sdj

Yusnimar Yusnimar, Khairat Khairat, Drastinawati Drastinawati, C. Chairul, Syamsu Herman, S. Ramadhana

引用次数: 0

Intensify Biodegradation Process of Polylactic Acid (PLA) Waste Generated from 3D Printing Activities 强化 3D 打印活动产生的聚乳酸 (PLA) 废弃物的生物降解过程

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-m2eeip

Muhammad Naqib Hamdan, Amir Mustaqim Mohd Naim, Nuradlyna Safyah Mohd Rozi, Mohd Shaiful Sajab, H. Kaco

{"title":"Intensify Biodegradation Process of Polylactic Acid (PLA) Waste Generated from 3D Printing Activities","authors":"Muhammad Naqib Hamdan, Amir Mustaqim Mohd Naim, Nuradlyna Safyah Mohd Rozi, Mohd Shaiful Sajab, H. Kaco","doi":"10.4028/p-m2eeip","DOIUrl":"https://doi.org/10.4028/p-m2eeip","url":null,"abstract":"Additive manufacturing, or 3D printing, is a key technology driving Industry 4.0. via the formation of three-dimensional objects from a computer-aided design model which can be done through layer-by-layer technique. Polylactic acid (PLA) ranks as one of the most favored materials as a 3D printing filament. Despite its unique properties, PLA took about 12 weeks to biodegrade which is slow degradation leads to an increased rate of plastic pollution in the environment. The aim of this study was to provide an alternative method for bioplastic waste management through biodegradation process using potting mix soil at different incubation temperatures and times. The PLA was designed in coupon shapes and eventually, 3D printed, respectively. Consequently, potting mix soil was prepared in a container and coupon, as all PLA samples were then planted 7 cm from the soil surface. Eventually, PLA samples were subjected to biodegradation process in the soil at 25 °C and 50 °C. Subsequently, each sample was drawn from the soil at different incubation times up to 65 days. The results show that prolong incubation time has resulted in PLA coupon losing weight up to 10.4% and 1.4% for the incubation time of 25 °C and 50 °C, respectively. Meanwhile, the physical structure has deteriorated to powder form and the fragility decreases proportionally as prolonged incubation time. Functional groups analysis showed the functional groups altered after the biodegradation process of PLA and soil. Ergo, this method can be utilized for the community to execute self-degradation of their PLA waste generated even at their own facility.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":"3 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140438691","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

Detection of Green-Synthesized Fe3O4/ Chitosan Using Spin Valve GMR Sensor with Wheatstone Bridge Circuit 利用带有惠斯通电桥电路的自旋阀 GMR 传感器检测绿色合成的 Fe3O4/ 壳聚糖

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-7ulydw

Shania Garcia, Ni’matil Mabarroh, Rona Cuana, H. Ardiyanti, N. Istiqomah, E. Suharyadi

{"title":"Detection of Green-Synthesized Fe3O4/ Chitosan Using Spin Valve GMR Sensor with Wheatstone Bridge Circuit","authors":"Shania Garcia, Ni’matil Mabarroh, Rona Cuana, H. Ardiyanti, N. Istiqomah, E. Suharyadi","doi":"10.4028/p-7ulydw","DOIUrl":"https://doi.org/10.4028/p-7ulydw","url":null,"abstract":"Detection of magnetic nanoparticles (MNPS) label is essential to determine the performance of giant magnetoresistance (GMR) sensors in biosensing technology. This research identifies the potency of green-synthesized Fe3O4/Chitosan on GMR sensors, which has never been explored. MNPS label was synthesized by the coprecipitation method based on the green synthesis route because cost-effective, non-toxic, and reduces waste production. Chitosan is considered the best polymer candidate as a stabilizer of Fe3O4 because they are biodegradable, biocompatible, and hydrophilic. The characteristics of Fe3O4/Chitosan with several concentrations and the effect on sensor signals were investigated. Measurement of Fe3O4/Chitosan using a spin-valve based sensor with a Ta (2nm)/Ir20Mn80(10nm)/Co90Fe10(3nm)/Co84Fe10B4(10nm)/Ta (5nm) structure on Si/SiO2 substrate. Fe3O4/Chitosan has a spherical shape with an inverse spinel cubic structure. The crystallite sizes of Fe3O4/Chitosan (1:1) and Fe3O4/Chitosan (2:1) are 7.9 and 7.5 nm, respectively. Fourier transforms infrared spectra of Fe3O4/Chitosan showed the NH2 bending at 1560 cm−1, C-O-C stretching at 1386 cm−1, and Fe-O stretching at 580 cm−1. The results indicate that chitosan effectively coated the surface of Fe3O4. The sensitivity of the GMR sensor increased to 0.04 mV/mg/mL and 0.05 mV/mg/mL, in the case of Fe3O4/Chitosan (1:1) and Fe3O4/Chitosan (2:1). The increase in the sensitivity was caused by the decrease in diamagnetic material composition, crystallite size and the increase in the saturation magnetization of Fe3O4/Chitosan. Green-synthesized Fe3O4/Chitosan can be detected by GMR sensor by providing a low external magnetic field within the 60s and reach ruthless performance as a magnetic label to be applied to biosensors application in the future.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140439411","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 Effects of Silver Nanoparticles on the Antimicrobial and Biodegradation of Cornstarch Bioplastic 银纳米粒子对玉米淀粉生物塑料抗菌和生物降解的影响

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-vvm7a4

Rina Ningtyas, Shanaz Nadya, Muryeti Muryeti, D. Priadi, Mochamad Chalid

{"title":"The Effects of Silver Nanoparticles on the Antimicrobial and Biodegradation of Cornstarch Bioplastic","authors":"Rina Ningtyas, Shanaz Nadya, Muryeti Muryeti, D. Priadi, Mochamad Chalid","doi":"10.4028/p-vvm7a4","DOIUrl":"https://doi.org/10.4028/p-vvm7a4","url":null,"abstract":"The development of bioplastics is currently increasing, because bioplastics are an effort to reduce landfill waste. One of the bioplastics that has good degradation ability is cornstarch. The addition of nanoparticles was carried out to improve the properties of bioplastic packaging. One example of the application of nanotechnology in food packaging is silver nanoparticles (AgNP), known as antimicrobial substances. This research was conducted to determine the effect of adding AgNP (0%, 1%, and 2%) on the antimicrobial and biodegradation of cornstarch bioplastics. Bioplastics are made by casting method. AgNP was used from the synthesis of silver nitrate (AgNO3) and trisodium citrate dihydrate (C6H5Na3O7.2H2O) as a reducing agent and stabilizer by chemical reduction method, which was then analyzed by FTIR. The results obtained showed that cornstarch bioplastic AgNP 1% has the ability to estimate the fastest degradation time among other concentrations with an addition of 103 days. Cornstarch bioplastic AgNP 2% had the best ability to inhibit bacterial growth, with antibacterial inhibition zone diameters of 11.03 mm (Staphylococcus aureus) and 10.61 mm (Escherichia coli). However, AgNP could not inhibit the mold growth of Aspergillus niger. The addition of AgNP to cornstarch bioplastics can increase the degradation capabilities and antibacterial activity of bioplastics.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":"23 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140439506","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

Impact Resistance Enhancement of GLARE Composite Laminates Reinforced with Shape Memory Alloy Wires 用形状记忆合金丝增强 GLARE 复合材料层压板的抗冲击性能

Materials Science Forum Pub Date : 2024-02-22 DOI: 10.4028/p-9wdbiu

Yudha Arya Sumbaga, Rahmat Saptono

{"title":"Impact Resistance Enhancement of GLARE Composite Laminates Reinforced with Shape Memory Alloy Wires","authors":"Yudha Arya Sumbaga, Rahmat Saptono","doi":"10.4028/p-9wdbiu","DOIUrl":"https://doi.org/10.4028/p-9wdbiu","url":null,"abstract":"This study investigates the impact resistance of Glass Laminate Aluminum Reinforced Epoxy (GLARE) composite laminates by incorporating shape memory alloy (SMA) wires. The influence of varying percentages of pre-strain (0%, 1%, 3%, and 5%) on the SMA wires embedded in the GLARE composites was examined. Laminate composites were made by hand lay-up method using 1100 series aluminum, glass laminate, epoxy resin, and nitinol wire. Impact testing was carried out using the Charpy (un-notched) method. The results demonstrate that the presence of SMA wires significantly enhances the impact resistance of the laminates. The energy absorption capacity of the laminates was found to increase with increasing pre-strain percentage. The highest impact resistance was observed in the specimens with 3% pre-strain, which exhibited a 35.2% increase in energy absorption compared to the specimens without SMA wires. However, a further increase in pre-strain to 5% resulted in a 21.5% decrease in energy absorption due to the higher fraction of stress-induced martensite, limiting the shape memory effect. Additionally, the damage analysis revealed that the absence of SMA wires led to severe debonding and delamination in the GLARE laminates. Conversely, specimens with 3% pre-strain exhibited the least damage, with limited debonding observed only in the front interface of the aluminum and epoxy-laminated fiberglass layers. The higher damage resistance of these specimens is attributed to their optimal energy absorption capability. Based on the findings, it is recommended to further investigate alternative shape memory alloy materials to determine their impact resistance enhancement potential compared to the current SMA wires. Additionally, conducting experiments with pre-strain percentages in the range of 3-5% would provide a better understanding of the maximum achievable performance. Furthermore, microscale observations should be conducted to gain more detailed insights into the damage mechanisms of the tested specimens.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":"67 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140439021","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

Synthesis and Characterization of AuNP/TiO2 Hybrid Nanoparticles for Possible Photocatalytic Application 可用于光催化应用的 AuNP/TiO2 混合纳米粒子的合成与表征

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-ogeu80

Jay C. Dulog, Romnick B. Unabia, Jared Deve P. Delicana, Aldrin Lalem, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno

{"title":"Synthesis and Characterization of AuNP/TiO2 Hybrid Nanoparticles for Possible Photocatalytic Application","authors":"Jay C. Dulog, Romnick B. Unabia, Jared Deve P. Delicana, Aldrin Lalem, Noel Lito B. Sayson, R. Capangpangan, A. Lubguban, Arnold A. Alguno","doi":"10.4028/p-ogeu80","DOIUrl":"https://doi.org/10.4028/p-ogeu80","url":null,"abstract":"Nanoparticles have been intensively studied due to their unique, size-dependent properties, paving the way for various applications, particularly in photocatalysis. This study aims to determine the physicochemical characteristics of TiO2 and Au nanoparticles and the AuNP/TiO2 hybrid nanoparticles. Employing multiple characterization techniques, the structural and functional parameters were elucidated. The Brunauer-Emmett-Teller (BET) surface area analysis revealed the pore sizes of TiO2 and the Au/TiO2 hybrid nanoparticles as 12 nm and 18 nm, respectively. The Dynamic light scattering (DLS) measurements revealed the hydrodynamic size of the AuNP/TiO2 hybrid nanoparticles at 386 nm. The UV-visible spectroscopy showed the absorbance peaks associated with their electronic structures and potential photocatalytic applications. The fast Fourier infrared (FTIR) spectroscopy results revealed the surface molecular interactions crucial for nanoparticle functionalities. The AuNP/TiO2 hybrid nanoparticles exhibit a larger pore size compared to TiO2NPs, indicating their superior adsorption capability. Moreover, the unique band gap of TiO2NPs and electron-hole pair generation make it a formidable candidate for photocatalysis. The incorporation of AuNPs may further augment charge separation, optimizing photocatalytic activity. These findings spotlight the promise of these AuNP/TiO2 hybrid nanoparticles in possible photocatalytic applications.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":"8 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774805","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

Application of Green Synthesized Silver Nanoparticles for Dye Wastewater Treatment 绿色合成银纳米粒子在染料废水处理中的应用

Materials Science Forum Pub Date : 2024-02-15 DOI: 10.4028/p-uifca6

Feb Alexis P. Marquez, E. Fundador, N. G. Fundador

{"title":"Application of Green Synthesized Silver Nanoparticles for Dye Wastewater Treatment","authors":"Feb Alexis P. Marquez, E. Fundador, N. G. Fundador","doi":"10.4028/p-uifca6","DOIUrl":"https://doi.org/10.4028/p-uifca6","url":null,"abstract":"A facile one-pot synthesis of silver nanoparticles (AgNPs) was achieved using the ethanolic extract of Cavendish banana florets as source of reducing agents for the conversion of Ag+ to Ag. The appearance of surface plasmon resonance peak between 410–435 nm in the UV Vis spectra confirmed the formation of AgNPs. The effects of different reaction conditions on the size and concentration of AgNPs were evaluated. The optimum conditions identified were pH 7 at 80 °C. Transmission electron microscopy (TEM) revealed spherical AgNPs with a mean particle size of 13.55 nm. On the other hand, energy-dispersive X-ray (EDX) analysis confirmed the presence of silver (Ag) as the bulk element (87.25%). Other elements such as carbon (C) and oxygen (O) are attributed to the capping agents of AgNPs which agrees with the results in the Fourier-transform infrared spectroscopy (FTIR) analysis. The optimized AgNPs were used for dye degradation using methyl orange (MO) as the model dye under acidified conditions. The maximum MO dye degradation of 96.07% and 77.32% at pH 1.5 and 2 were achieved after 10 min and 1320 min, respectively. This highlights the potential use of green-synthesized AgNPs for dye wastewater treatment.","PeriodicalId":507742,"journal":{"name":"Materials Science Forum","volume":"83 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774840","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