M. Bijarimi, Tan Joo Yee, La Ode Muhammad Zuhdi Mulkiyan
This study utilizes a polymer matrix made from a combination of Poly (Lactic Acid) (PLA) and Linear Low-Density Polyethylene (LLDPE). The polymer matrix is then improved by adding a compatibilizer, Polyethylene-graft-maleic anhydride (PE-g-MA), a filler, Recycled Tyre Waste (RTW), and a nano-scale filler, Graphene nanoplatelets (GNPs). Examining how PE-g-MA, RTW, and GNPs influence the binary blend's (PLA/RTW) chemical and thermo-mechanical characteristics is the focus of this study. A twin-screw extruder is used for the melting and intercalating processes. The binary mixture consists of 5% PE-g-MA, five percent RTW, and 3% GNPs. The samples are then pelletized after being cooled to room temperature. Analysis and characterization of the pelletized samples thermal and chemical characteristics follow. After including a compatibilizer, filler, and nanofiller into the bionanocomposite, improved qualities are anticipated.
{"title":"Green Bionanocomposites of Poly(Lactic Acid) (PLA) and Linear Low-Density Polyethylene (LLDPE): Fabrication and Properties","authors":"M. Bijarimi, Tan Joo Yee, La Ode Muhammad Zuhdi Mulkiyan","doi":"10.4028/p-8e7oya","DOIUrl":"https://doi.org/10.4028/p-8e7oya","url":null,"abstract":"This study utilizes a polymer matrix made from a combination of Poly (Lactic Acid) (PLA) and Linear Low-Density Polyethylene (LLDPE). The polymer matrix is then improved by adding a compatibilizer, Polyethylene-graft-maleic anhydride (PE-g-MA), a filler, Recycled Tyre Waste (RTW), and a nano-scale filler, Graphene nanoplatelets (GNPs). Examining how PE-g-MA, RTW, and GNPs influence the binary blend's (PLA/RTW) chemical and thermo-mechanical characteristics is the focus of this study. A twin-screw extruder is used for the melting and intercalating processes. The binary mixture consists of 5% PE-g-MA, five percent RTW, and 3% GNPs. The samples are then pelletized after being cooled to room temperature. Analysis and characterization of the pelletized samples thermal and chemical characteristics follow. After including a compatibilizer, filler, and nanofiller into the bionanocomposite, improved qualities are anticipated.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140220332","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}
Computational research on the influence of the electron acceptor group position of cyano-3-acetic acid on γ-mangostin as a sensitizer in Dye-Sensitized Solar Cell (DSSC) has been carried out with variations in the positions of the atoms O-1, O-2, O-3 and O- 4. The photoelectric properties are known from the HOMO-LUMO energy parameters, UV-Vis absorption, |VRP|, ΔGinject, ΔGreg, τ, LHE and FEDAM. Geometry optimization uses Orca 4.2.1 with a 6-31G* basis set and interpretation uses Avogadro, Chemissian and GaussSum. Ground state optimization uses the DFT-B3LYP method and excited state optimization uses the TD-DFT-B3LYP method. The results showed that the difference in photoelectric properties affected the DSSC performance. O-2 has the best parameters for electron scattering and UV-Vis light with an absorption of 426 nm. O-3 has the best value for excited state lifetime (τ) and coupling constant (|VRP|). O-3 has a weakness in the LHE value. The LHE value for compounds without modification has the best value. Based on the qualitative parameters of the Full-Electron Donor-Acceptor Map (FEDAM) it was found that the ability of cyano-3-acetic acid as an electron acceptor is better at O-2.
{"title":"The Effect of Position of Cyano-3-Acetic Acid Electron Withdrawing Group on γ-Mangostin as a Sensitizer on Dye-Sensitized Solar Cells (DSSC): Theoretical Study","authors":"Zulfa Ahmad Nurkholiq, Sudarlin Sudarlin","doi":"10.4028/p-8zxx1r","DOIUrl":"https://doi.org/10.4028/p-8zxx1r","url":null,"abstract":"Computational research on the influence of the electron acceptor group position of cyano-3-acetic acid on γ-mangostin as a sensitizer in Dye-Sensitized Solar Cell (DSSC) has been carried out with variations in the positions of the atoms O-1, O-2, O-3 and O- 4. The photoelectric properties are known from the HOMO-LUMO energy parameters, UV-Vis absorption, |VRP|, ΔGinject, ΔGreg, τ, LHE and FEDAM. Geometry optimization uses Orca 4.2.1 with a 6-31G* basis set and interpretation uses Avogadro, Chemissian and GaussSum. Ground state optimization uses the DFT-B3LYP method and excited state optimization uses the TD-DFT-B3LYP method. The results showed that the difference in photoelectric properties affected the DSSC performance. O-2 has the best parameters for electron scattering and UV-Vis light with an absorption of 426 nm. O-3 has the best value for excited state lifetime (τ) and coupling constant (|VRP|). O-3 has a weakness in the LHE value. The LHE value for compounds without modification has the best value. Based on the qualitative parameters of the Full-Electron Donor-Acceptor Map (FEDAM) it was found that the ability of cyano-3-acetic acid as an electron acceptor is better at O-2.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140212918","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}
R. N. M. Delda, R. L. B. del Rosario, B. Tuazon, G. S. Robles, M. V. Villablanca, M. T. Espino, J. R. Dizon
3D printing is now being applied in various research areas due to its ability to produce highly complex parts whenever needed. This is highly helpful in the fields of robotics; radiation environment monitoring and space applications where stand-alone equipment are usually required. In this work, FDM 3D-printed polycarbonate acrylonitrile butadiene styrene (PCABS) samples were subjected to 1 kGy to 9 kGy of gamma irradiation from a Cobalt-60 irradiator. Parameters such as infill density and dose rate were modified to determine the best setting to improve the mechanical characteristics of the 3D-printed thermoplastic. Results show that samples with lower infill density obtain higher ultimate strength when exposed to higher doses of radiation.
由于 3D 打印能够根据需要随时生产高度复杂的部件，因此目前已被应用于各种研究领域。这对于通常需要独立设备的机器人、辐射环境监测和空间应用领域大有帮助。在这项工作中，FDM 三维打印的聚碳酸酯丙烯腈丁二烯苯乙烯（PCABS）样品受到来自钴-60辐照装置的 1 kGy 至 9 kGy 伽马辐照。对填充密度和剂量率等参数进行了修改，以确定改善 3D 打印热塑性塑料机械特性的最佳设置。结果表明，填充密度较低的样品在接受较高剂量的辐照时可获得较高的极限强度。
{"title":"Effects of Gamma Irradiation on the Tensile Properties of 3D-Printed Polycarbonate Acrylonitrile Butadiene Styrene","authors":"R. N. M. Delda, R. L. B. del Rosario, B. Tuazon, G. S. Robles, M. V. Villablanca, M. T. Espino, J. R. Dizon","doi":"10.4028/p-6xqmkv","DOIUrl":"https://doi.org/10.4028/p-6xqmkv","url":null,"abstract":"3D printing is now being applied in various research areas due to its ability to produce highly complex parts whenever needed. This is highly helpful in the fields of robotics; radiation environment monitoring and space applications where stand-alone equipment are usually required. In this work, FDM 3D-printed polycarbonate acrylonitrile butadiene styrene (PCABS) samples were subjected to 1 kGy to 9 kGy of gamma irradiation from a Cobalt-60 irradiator. Parameters such as infill density and dose rate were modified to determine the best setting to improve the mechanical characteristics of the 3D-printed thermoplastic. Results show that samples with lower infill density obtain higher ultimate strength when exposed to higher doses of radiation.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140218627","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}
The graphite electrode was changed by applying cyclic voltammetry to electropolymerized curcumin. Then, the polycurcumin-modified graphite electrodes (GECU) were used to determine Cd2+ concentration. The results showed that the GECU electrodes had higher electrocatalytic activity toward Cd2+ than bare graphite electrodes. Furthermore, the effect of the scan rates showed that the electrochemical process controlling the redox behavior of Cd2+ on GECU is a diffusion-controlled electrochemical process. At Cd2+ ranging from 0.22 to 11.03 ppm, the relationship between oxidation peak current (Ip) and Cd2+ concentration follows the linear regression equation of Ip = 73.024[Cd2+] + 722.02 (μA, R2 = 0.9936). It means that under experimental conditions, an increase in Cd2+ from 0.22 to 11.03 ppm can increase the Ip value. On the other hand, At Cd2+ ranging from 11.03 to 55.07 ppm, the relationship between Ip and Cd2+ concentration follows the linear equation of Ip = 24.227[Cd2+] + 1212.6 (μA, R2 = 0.9920). The LOD and LOQ were determined at low Cd2+ concentrations, namely 0.86 ppm, and 2.84 ppm, respectively. Furthermore, the suggested modification has been used successfully and with satisfactory recoveries to determine the presence of Cd2+ in laboratory liquid wastewater.
{"title":"Preparation of Polycurcumin-Modified Graphite Electrode via Electropolymerization and its Application for Determining Cd2+","authors":"S. Marwati, A. Prodjosantoso, R. T. Padmaningrum","doi":"10.4028/p-oxx5yp","DOIUrl":"https://doi.org/10.4028/p-oxx5yp","url":null,"abstract":"The graphite electrode was changed by applying cyclic voltammetry to electropolymerized curcumin. Then, the polycurcumin-modified graphite electrodes (GECU) were used to determine Cd2+ concentration. The results showed that the GECU electrodes had higher electrocatalytic activity toward Cd2+ than bare graphite electrodes. Furthermore, the effect of the scan rates showed that the electrochemical process controlling the redox behavior of Cd2+ on GECU is a diffusion-controlled electrochemical process. At Cd2+ ranging from 0.22 to 11.03 ppm, the relationship between oxidation peak current (Ip) and Cd2+ concentration follows the linear regression equation of Ip = 73.024[Cd2+] + 722.02 (μA, R2 = 0.9936). It means that under experimental conditions, an increase in Cd2+ from 0.22 to 11.03 ppm can increase the Ip value. On the other hand, At Cd2+ ranging from 11.03 to 55.07 ppm, the relationship between Ip and Cd2+ concentration follows the linear equation of Ip = 24.227[Cd2+] + 1212.6 (μA, R2 = 0.9920). The LOD and LOQ were determined at low Cd2+ concentrations, namely 0.86 ppm, and 2.84 ppm, respectively. Furthermore, the suggested modification has been used successfully and with satisfactory recoveries to determine the presence of Cd2+ in laboratory liquid wastewater.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140218744","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}
Ramesh K. Agarwal, Deny Setiawan, Shofwatul Uyun, Kazuo Umemura
{"title":"Functional and Special Materials, Technologies of Chemical Production","authors":"Ramesh K. Agarwal, Deny Setiawan, Shofwatul Uyun, Kazuo Umemura","doi":"10.4028/b-5awocy","DOIUrl":"https://doi.org/10.4028/b-5awocy","url":null,"abstract":"","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140215399","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}
Yazan Firas Fuad Hussein, Altamish Ahmed Pakeer, R. Muneer, M. Hashmet, Younes Alblooshi
Polymer flooding, an improved oil recovery technique, is a well-established method for improving oil production. Although numerous polymers have been suggested in the literature, identifying suitable ones for applications in high-temperature and high-salinity carbonate reservoirs remains a challenging task. The viscosity of polymer solutions depends on various parameters, including polymer concentration, temperature, and shear rate. Therefore, screening polymers for these demanding conditions necessitates meticulous experimental work. In this experimental study, polymer solutions' physical property—viscosity—was measured as a function of polymer concentration, temperature, and shear rate. Subsequently, the generated rheological data were used to develop empirical models capable of predicting the viscosity of polymer solutions under various conditions. An acceptable match was achieved between the experimental and model-predicted data. Furthermore, a validation was conducted for the empirical models, yielding a root mean square error of 1.75. These models will significantly reduce the number of experiments required for the screening process and prove valuable for optimization procedures.
{"title":"Laboratory Investigation and Empirical Modelling of Polymer Solution Viscosity","authors":"Yazan Firas Fuad Hussein, Altamish Ahmed Pakeer, R. Muneer, M. Hashmet, Younes Alblooshi","doi":"10.4028/p-sd0oki","DOIUrl":"https://doi.org/10.4028/p-sd0oki","url":null,"abstract":"Polymer flooding, an improved oil recovery technique, is a well-established method for improving oil production. Although numerous polymers have been suggested in the literature, identifying suitable ones for applications in high-temperature and high-salinity carbonate reservoirs remains a challenging task. The viscosity of polymer solutions depends on various parameters, including polymer concentration, temperature, and shear rate. Therefore, screening polymers for these demanding conditions necessitates meticulous experimental work. In this experimental study, polymer solutions' physical property—viscosity—was measured as a function of polymer concentration, temperature, and shear rate. Subsequently, the generated rheological data were used to develop empirical models capable of predicting the viscosity of polymer solutions under various conditions. An acceptable match was achieved between the experimental and model-predicted data. Furthermore, a validation was conducted for the empirical models, yielding a root mean square error of 1.75. These models will significantly reduce the number of experiments required for the screening process and prove valuable for optimization procedures.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140217540","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}
In the current era of additive manufacturing, Fused Deposition Modelling (FDM) method of printing is being studied extensively to print a concept model. Therefore, the dimensional accuracy and the mechanical properties of the FDM 3D printed part are very important. In this study, the tensile specimens are prepared according to ASTM D638 Type I. Dimensions of the specimen is measured in the x-direction (length), y-direction (width), and z-direction (height) and is compared against the standard measurement for accuracy. Tensile stress, strain at break and Young’s modulus were also investigated. Overall, the dimension accuracy achieved is more than 98%. The highest accuracy is obtained by using 0.2mm layer thickness and 0.2mm initial layer thickness. The tensile stress, Young’s modulus and strain at break are found to decrease when the layer thickness is increased. This is due having more layer with lesser and smaller voids which increases the strength and stiffness. Increasing initial layer thickness, however, has a low influence on the tensile stress but can greatly affect the Young’s modulus.
在当前的增材制造时代，人们正在广泛研究熔融沉积成型（FDM）打印方法来打印概念模型。因此，FDM 三维打印部件的尺寸精度和机械性能非常重要。在本研究中，拉伸试样是根据 ASTM D638 I 类标准制备的。试样的尺寸在 x 方向（长度）、y 方向（宽度）和 z 方向（高度）上进行测量，并与标准测量值进行比较，以确保精度。此外，还对拉伸应力、断裂应变和杨氏模量进行了研究。总体而言，达到的尺寸精度超过 98%。使用 0.2 毫米的层厚和 0.2 毫米的初始层厚获得的精度最高。当层厚度增加时，拉伸应力、杨氏模量和断裂应变都会减小。这是因为层数越多，空隙越小，强度和刚度就越高。然而，增加初始层厚对拉伸应力的影响较小，但对杨氏模量的影响却很大。
{"title":"Investigation on Layer Thickness on Mechanical Properties and Dimension Accuracy in Fused Deposition Modelling 3D Printing","authors":"Ming Yi Chen, Rayson Pang, Mun Kou Lai","doi":"10.4028/p-3s2pqo","DOIUrl":"https://doi.org/10.4028/p-3s2pqo","url":null,"abstract":"In the current era of additive manufacturing, Fused Deposition Modelling (FDM) method of printing is being studied extensively to print a concept model. Therefore, the dimensional accuracy and the mechanical properties of the FDM 3D printed part are very important. In this study, the tensile specimens are prepared according to ASTM D638 Type I. Dimensions of the specimen is measured in the x-direction (length), y-direction (width), and z-direction (height) and is compared against the standard measurement for accuracy. Tensile stress, strain at break and Young’s modulus were also investigated. Overall, the dimension accuracy achieved is more than 98%. The highest accuracy is obtained by using 0.2mm layer thickness and 0.2mm initial layer thickness. The tensile stress, Young’s modulus and strain at break are found to decrease when the layer thickness is increased. This is due having more layer with lesser and smaller voids which increases the strength and stiffness. Increasing initial layer thickness, however, has a low influence on the tensile stress but can greatly affect the Young’s modulus.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 43","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140212602","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}
Pranithan Silprasert, A. Boonmahitthisud, S. Tanpichai
This study focused on the preparation of hydrogels of poly (vinyl alcohol) and cellulose extracted from hemp fibers with the aid of borax as a cross-linking agent. Cellulose extracted from hemp fibers was initially dissolved in a mixed solution of urea and NaOH to obtain a cellulose solution. In the meantime, PVA was also dissolved in the urea and NaOH. These two solutions were mixed, and various loadings of borax were introduced. Moreover, the effect of borax loadings on equilibrium water content (EWC) and compression properties of the cross-linked hydrogels was investigated. The cross-linked hydrogels showed an EWC of 95.76% and a compression set of 9.71%, compared to those of the physical cross-linked hydrogels which had an EWC of 92.40% and a compression set of 29.96%. It was found that the chemically crosslinked hydrogels exhibited greater stability compared with physical ones owing to the stronger interaction induced by borax. Therefore, The PVA/cellulose hydrogels cross-linked with borax hold potential in various applications such as wound dressing, wastewater treatment, and agricultural fields.
{"title":"Using Borax as a Cross-Linking Agent in Poly(Vinyl Alcohol)/Hemp-Extracted Cellulose Hydrogels","authors":"Pranithan Silprasert, A. Boonmahitthisud, S. Tanpichai","doi":"10.4028/p-s30w1d","DOIUrl":"https://doi.org/10.4028/p-s30w1d","url":null,"abstract":"This study focused on the preparation of hydrogels of poly (vinyl alcohol) and cellulose extracted from hemp fibers with the aid of borax as a cross-linking agent. Cellulose extracted from hemp fibers was initially dissolved in a mixed solution of urea and NaOH to obtain a cellulose solution. In the meantime, PVA was also dissolved in the urea and NaOH. These two solutions were mixed, and various loadings of borax were introduced. Moreover, the effect of borax loadings on equilibrium water content (EWC) and compression properties of the cross-linked hydrogels was investigated. The cross-linked hydrogels showed an EWC of 95.76% and a compression set of 9.71%, compared to those of the physical cross-linked hydrogels which had an EWC of 92.40% and a compression set of 29.96%. It was found that the chemically crosslinked hydrogels exhibited greater stability compared with physical ones owing to the stronger interaction induced by borax. Therefore, The PVA/cellulose hydrogels cross-linked with borax hold potential in various applications such as wound dressing, wastewater treatment, and agricultural fields.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140216886","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}
Indah Nursyamsi Handayani, Vivi Fauzia, A. H. Saputro, N. H. Apriantoro
Ensuring the vitamin C requirements are met through dietary intake or supplements is essential for health. In this study, a simple and rapid visual detection method for semi-quantitative analysis of vitamin C was proposed based on sodium citrate-stabilized silver nanoparticles (SC-AgNPs). As a validation of SC-AgNPs as a colorimetric sensor for vitamin C, color changes were observed gradually, shifting from transparent yellow to deep brown after the addition of vitamin C at various concentrations. That is also supported by an increase in absorption intensity at the peak wavelength of 417 nm, which was analyzed using a UV-Vis spectrophotometer. Based on the spectral approach method, the linear relationship between absorbance values and vitamin C is in the range of 0-4.2 mM, with a coefficient correlation of 0.99 and sensitivity of 0.95/mM. Furthermore, the feasibility of the SC-AgNPs for vitamin C detection in healthy beverages and tablet pharmaceuticals has been investigated.
通过膳食摄入或补充剂确保维生素 C 的需求量对健康至关重要。本研究提出了一种基于柠檬酸钠稳定银纳米粒子（SC-AgNPs）的半定量分析维生素 C 的简单快速视觉检测方法。为验证 SC-AgNPs 作为维生素 C 比色传感器的有效性，在加入不同浓度的维生素 C 后，观察到颜色逐渐发生变化，从透明黄色变为深褐色。使用紫外可见分光光度计分析，在峰值波长 417 纳米处的吸收强度增加也证明了这一点。根据光谱法，吸光度值与维生素 C 的线性关系范围为 0-4.2 mM，相关系数为 0.99，灵敏度为 0.95/mM。此外，还研究了 SC-AgNPs 在健康饮料和片剂药物中检测维生素 C 的可行性。
{"title":"Rapid and Visual Detection of Vitamin C Based on Sodium Citrate-Stabilized Silver Nanoparticles","authors":"Indah Nursyamsi Handayani, Vivi Fauzia, A. H. Saputro, N. H. Apriantoro","doi":"10.4028/p-a2dgqn","DOIUrl":"https://doi.org/10.4028/p-a2dgqn","url":null,"abstract":"Ensuring the vitamin C requirements are met through dietary intake or supplements is essential for health. In this study, a simple and rapid visual detection method for semi-quantitative analysis of vitamin C was proposed based on sodium citrate-stabilized silver nanoparticles (SC-AgNPs). As a validation of SC-AgNPs as a colorimetric sensor for vitamin C, color changes were observed gradually, shifting from transparent yellow to deep brown after the addition of vitamin C at various concentrations. That is also supported by an increase in absorption intensity at the peak wavelength of 417 nm, which was analyzed using a UV-Vis spectrophotometer. Based on the spectral approach method, the linear relationship between absorbance values and vitamin C is in the range of 0-4.2 mM, with a coefficient correlation of 0.99 and sensitivity of 0.95/mM. Furthermore, the feasibility of the SC-AgNPs for vitamin C detection in healthy beverages and tablet pharmaceuticals has been investigated.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 40","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140217903","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}
J. Panggabean, P. Simamora, J. Rajagukguk, Chayani S. Sarumaha, J. Kaewkhao
Glass doped with cerium is an attractive material for a variety of applications. The aluminium fluorophosphate glasses were made by the conventional melt-quenching technique. The glass samples were characterized by density, refractive index, FTIR and photoluminescence spectra. The density was shown to increase, but refractive and molar volume were shown to decrease. The FTIR spectra of these glasses showed mainly [PO3] and [PO4] structural units. Transparency of the glass samples is demonstrated by a transmission intensity in the 70-80% range. Regarding the optical properties, under 307 nm excitation, the emission peak around 348 nm of the CeF3-doped aluminium fluorophosphate glasses was confirmed. The emission would be due to the 5d→4f transitions of Ce3+ ions.
{"title":"Physical and Optical Properties of CeF3 Doped with Aluminium Fluorophosphate Glasses","authors":"J. Panggabean, P. Simamora, J. Rajagukguk, Chayani S. Sarumaha, J. Kaewkhao","doi":"10.4028/p-j6x51c","DOIUrl":"https://doi.org/10.4028/p-j6x51c","url":null,"abstract":"Glass doped with cerium is an attractive material for a variety of applications. The aluminium fluorophosphate glasses were made by the conventional melt-quenching technique. The glass samples were characterized by density, refractive index, FTIR and photoluminescence spectra. The density was shown to increase, but refractive and molar volume were shown to decrease. The FTIR spectra of these glasses showed mainly [PO3] and [PO4] structural units. Transparency of the glass samples is demonstrated by a transmission intensity in the 70-80% range. Regarding the optical properties, under 307 nm excitation, the emission peak around 348 nm of the CeF3-doped aluminium fluorophosphate glasses was confirmed. The emission would be due to the 5d→4f transitions of Ce3+ ions.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":" 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140220677","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}
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