Pub Date : 2024-03-19DOI: 10.55713/jmmm.v34i1.1931
K. Boonserm, Anan Sutcha, Rarm Phinjaroenphan
Green synthesis of photocatalyst bimetallic CuO@NiO nanocomposite for eliminating organic hazardous glyphosate (Gly) solution has been introduced. The nanocomposite has been successfully developed from mango (Mangifera indica L.) peel extracted solution by a simultaneous reduction process. HRTEM, XRD, and EDX have also been used to explore the nanostructure, crystal conformation, and chemical compositions of CuO@NiO. Using UV-vis spectrometer, we have observed the photo-catalytic activity and kinetic removal rate constant of CuO@NiO in terms of glyphosate elimination under UV light illumination. Compared with pure CuO and NiO nanoparticles, CuO@NiO displayed improved and enhanced photocatalytic activity. This work demonstrates an eco-friendly, low-cost material with high efficiency for removing Gly, which has applications in environmental protection.
{"title":"Green synthesis of bimetallic CuO@NiO nanocomposite for the removal of glyphosate","authors":"K. Boonserm, Anan Sutcha, Rarm Phinjaroenphan","doi":"10.55713/jmmm.v34i1.1931","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1931","url":null,"abstract":"Green synthesis of photocatalyst bimetallic CuO@NiO nanocomposite for eliminating organic hazardous glyphosate (Gly) solution has been introduced. The nanocomposite has been successfully developed from mango (Mangifera indica L.) peel extracted solution by a simultaneous reduction process. HRTEM, XRD, and EDX have also been used to explore the nanostructure, crystal conformation, and chemical compositions of CuO@NiO. Using UV-vis spectrometer, we have observed the photo-catalytic activity and kinetic removal rate constant of CuO@NiO in terms of glyphosate elimination under UV light illumination. Compared with pure CuO and NiO nanoparticles, CuO@NiO displayed improved and enhanced photocatalytic activity. This work demonstrates an eco-friendly, low-cost material with high efficiency for removing Gly, which has applications in environmental protection.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"57 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140231051","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}
Pub Date : 2024-03-19DOI: 10.55713/jmmm.v34i1.1824
Rajie A. Medina, Michael E. Franco, L. M. De Juan‐Corpuz, Ryan D. Corpuz
The emerging field of carbon dots (CDs), a type of carbon nanostructure that has gained significant attention due to its unique properties and potential applications. CDs possess remarkable attributes, including photoluminescence, electrochemical potential, compatibility with living organisms, solubility in water, chemical stability, and versatile surface properties. The chemical structure, particle size, and surface functionalities of CDs all have an impact on their photoluminescent properties, which are the focus of this review. The photoluminescence mechanism in CDs is discussed, highlighting their amorphous structure, and comparing them to graphene quantum dots. The paper delves into the application of CDs in artificial photosynthesis, which enhances crop growth by improving the photo-synthesis process. CDs increase sunlight and carbon dioxide absorption rates by interacting with plant leaves, potentially leading to substantial crop yield improvements. The advantages of CDs in artificial photosynthesis are explored, including their modifiable absorption characteristics across the ultraviolet to near-infrared spectrum. The paper acknowledges challenges in CD production, such as size control and aggregation, while emphasizing their potential in various fields, including sensing, bioimaging, energy devices, and catalysis. CDs' unique optical properties and versatile applications suggest a promising future for these nanostructures in numerous scientific and technological domains.
碳点（CD）是一种新兴的碳纳米结构，因其独特的性能和潜在的应用而备受关注。碳点具有非凡的特性，包括光致发光、电化学潜力、与生物体的兼容性、水溶性、化学稳定性和多功能表面特性。光盘的化学结构、粒度和表面功能都会对其光致发光特性产生影响，这也是本综述的重点。本文讨论了 CD 的光致发光机制，强调了其非晶结构，并将其与石墨烯量子点进行了比较。论文深入探讨了光盘在人工光合作用中的应用，通过改善光合成过程来促进作物生长。光盘通过与植物叶片相互作用，提高了阳光和二氧化碳的吸收率，从而有可能大幅提高作物产量。本文探讨了人工光合作用中 CD 的优势，包括其在紫外线到近红外光谱范围内可修改的吸收特性。论文承认了光盘生产中的挑战，如尺寸控制和聚集，同时强调了它们在传感、生物成像、能源设备和催化等各个领域的潜力。光盘独特的光学特性和广泛的应用表明，这些纳米结构在众多科学和技术领域前景广阔。
{"title":"Photoluminescent carbon nanodots for artificial photosynthesis","authors":"Rajie A. Medina, Michael E. Franco, L. M. De Juan‐Corpuz, Ryan D. Corpuz","doi":"10.55713/jmmm.v34i1.1824","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1824","url":null,"abstract":"The emerging field of carbon dots (CDs), a type of carbon nanostructure that has gained significant attention due to its unique properties and potential applications. CDs possess remarkable attributes, including photoluminescence, electrochemical potential, compatibility with living organisms, solubility in water, chemical stability, and versatile surface properties. The chemical structure, particle size, and surface functionalities of CDs all have an impact on their photoluminescent properties, which are the focus of this review. The photoluminescence mechanism in CDs is discussed, highlighting their amorphous structure, and comparing them to graphene quantum dots. The paper delves into the application of CDs in artificial photosynthesis, which enhances crop growth by improving the photo-synthesis process. CDs increase sunlight and carbon dioxide absorption rates by interacting with plant leaves, potentially leading to substantial crop yield improvements. The advantages of CDs in artificial photosynthesis are explored, including their modifiable absorption characteristics across the ultraviolet to near-infrared spectrum. The paper acknowledges challenges in CD production, such as size control and aggregation, while emphasizing their potential in various fields, including sensing, bioimaging, energy devices, and catalysis. CDs' unique optical properties and versatile applications suggest a promising future for these nanostructures in numerous scientific and technological domains.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"52 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140231318","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}
Pub Date : 2024-03-19DOI: 10.55713/jmmm.v34i1.1875
Sufriadin, Malyanus Yepta, I. Nur, Purwanto, Rizky Amalia, U. R. Irfan, Djabal Nur Basir, Tsubasa Otake
The atmospheric acid leaching studies of a limonite ore sample from the Wolo mine area, Southeast Sulawesi, Indonesia, have been performed using hydrochloric acid (HCl) and nitric acid (HNO3). The objectives of these studies were to compare the leaching degree of metals (Ni, Co, Fe, and Al) and to analyze the dissolution behavior of minerals under different acid concentrations. Mineralogical characterization of the ore sample was conducted using optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction, whereas chemical composition was determined by X-ray fluorescence (XRF) spectrometry and atomic absorption spectroscopy (AAS), respectively. An atmospheric leaching test was done with the variables of acid concentration, leaching duration of 90 min, and leaching temperature of 100℃. Limonite ore samples contain goethite, gibbsite, talc, quartz, and lizardite. It was revealed that as much as 92.22% of Ni and 90.14% of Fe could be leached using 3 M HCl, whereas only 63.14% of Ni and 38.74% of Fe could be extracted from limonite ore using 3 M HNO3. The higher leaching degree of Fe in HCl indicates low selectivity with Ni, which might contaminate pregnant leach solution (PLS), leading to further complications in the purification process. Results of the leaching experiment show that goethite was more easily dissolved in HCl than in HNO3.
我们使用盐酸（HCl）和硝酸（HNO3）对印度尼西亚东南苏拉威西省沃洛矿区的褐铁矿样本进行了常压酸浸出研究。这些研究的目的是比较金属（镍、钴、铁和铝）的浸出程度，并分析矿物在不同酸浓度下的溶解行为。使用光学显微镜、扫描电子显微镜（SEM）和 X 射线衍射法对矿石样本进行了矿物学表征，并分别使用 X 射线荧光光谱法（XRF）和原子吸收光谱法（AAS）测定了化学成分。在酸浓度、浸出时间为 90 分钟、浸出温度为 100℃的条件下，进行了常压浸出试验。褐铁矿矿石样品中含有鹅卵石、吉比石、滑石、石英和蜥蜴石。结果表明，使用 3 M HCl 可以浸出高达 92.22% 的镍和 90.14% 的铁，而使用 3 M HNO3 只能从褐铁矿中提取 63.14% 的镍和 38.74% 的铁。在盐酸中铁的浸出率较高，说明镍的选择性较低，可能会污染孕浸溶液（PLS），导致提纯过程更加复杂。浸出实验的结果表明，与在 HNO3 中相比，在 HCl 中更容易溶解高铁锰矿。
{"title":"Atmospheric hydrochloric and nitric acid leaching of a limonite ore from the Wolo mine area, Southeast Sulawesi, Indonesia","authors":"Sufriadin, Malyanus Yepta, I. Nur, Purwanto, Rizky Amalia, U. R. Irfan, Djabal Nur Basir, Tsubasa Otake","doi":"10.55713/jmmm.v34i1.1875","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1875","url":null,"abstract":"The atmospheric acid leaching studies of a limonite ore sample from the Wolo mine area, Southeast Sulawesi, Indonesia, have been performed using hydrochloric acid (HCl) and nitric acid (HNO3). The objectives of these studies were to compare the leaching degree of metals (Ni, Co, Fe, and Al) and to analyze the dissolution behavior of minerals under different acid concentrations. Mineralogical characterization of the ore sample was conducted using optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction, whereas chemical composition was determined by X-ray fluorescence (XRF) spectrometry and atomic absorption spectroscopy (AAS), respectively. An atmospheric leaching test was done with the variables of acid concentration, leaching duration of 90 min, and leaching temperature of 100℃. Limonite ore samples contain goethite, gibbsite, talc, quartz, and lizardite. It was revealed that as much as 92.22% of Ni and 90.14% of Fe could be leached using 3 M HCl, whereas only 63.14% of Ni and 38.74% of Fe could be extracted from limonite ore using 3 M HNO3. The higher leaching degree of Fe in HCl indicates low selectivity with Ni, which might contaminate pregnant leach solution (PLS), leading to further complications in the purification process. Results of the leaching experiment show that goethite was more easily dissolved in HCl than in HNO3.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"33 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140230349","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}
Pub Date : 2024-03-19DOI: 10.55713/jmmm.v34i1.1777
Hamza Milles, Louafi Snani, Amel Oulabbas, Khaled Toualbia
Thermal barriers are used as protective coating for critical components working at high temperature of gas turbines. Forsterite (Mg2SiO4) ceramic is proposed by researchers as a novel thermal barrier coating (TBC), due to its low thermal conductivity and good thermal expansion. Hot corrosion results from the molten salts effect on the TBC’s surface, accumulated during the combustion processes. In this study, Mg2SiO4 samples were exposed to Na2SO4 molten salt at 900℃, 1000℃ and 1100℃ for 6 h in air. Samples were investigated and compared using scanning electron microscope (SEM) and X-Ray diffractometer (XRD). MgSO4 was the predominant corrosion product observed on the surface of the samples. Na2Mg5Si12O30 was also observed at 1000℃ and 1100℃, and Na2SiO3 appeared only on sample treated at 900℃.
{"title":"Hot corrosion behavior of Mg(_{2})SiO(_{4}) ceramic exposed to molten Na(_{2})SO(_{4}) at 900℃ to 1100℃","authors":"Hamza Milles, Louafi Snani, Amel Oulabbas, Khaled Toualbia","doi":"10.55713/jmmm.v34i1.1777","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1777","url":null,"abstract":"Thermal barriers are used as protective coating for critical components working at high temperature of gas turbines. Forsterite (Mg2SiO4) ceramic is proposed by researchers as a novel thermal barrier coating (TBC), due to its low thermal conductivity and good thermal expansion. Hot corrosion results from the molten salts effect on the TBC’s surface, accumulated during the combustion processes. In this study, Mg2SiO4 samples were exposed to Na2SO4 molten salt at 900℃, 1000℃ and 1100℃ for 6 h in air. Samples were investigated and compared using scanning electron microscope (SEM) and X-Ray diffractometer (XRD). MgSO4 was the predominant corrosion product observed on the surface of the samples. Na2Mg5Si12O30 was also observed at 1000℃ and 1100℃, and Na2SiO3 appeared only on sample treated at 900℃.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"50 s27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140230150","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}
Pub Date : 2024-03-19DOI: 10.55713/jmmm.v34i1.1939
A. Jinnapat, Auamporn Rattanasing, Nithiwach Nawaukkaratharnant, Kritkeaw Somton, K. Dateraksa
This research aimed to investigate the possibility of using the mixture of boric acid and glutinous rice flour as a cost-efficient alternative additive for producing silicon carbide (SiC) ceramic sintered at 1800℃ via pressureless solid-state sintering. The results indicated that the addition of boric acid- glutinous rice flour mixture (10 wt%) in an appropriate ratio (0.5 by molar ratio) into the SiC mixture (90 wt%) enhanced the densification and flexural strength of sintered SiC samples. However, increasing boric acid/glutinous rice flour ratio reduces density and flexural strength. The 5.45 wt% carbon content was sufficient to remove the oxide layer of the SiC surface and improve the properties of SiC ceramic. In summary, the boric acid-glutinous rice flour mixture has a high potential to be used as an additive for producing dense and porous SiC ceramics via pressureless solid-state sintering.
{"title":"Possibility of using boric acid and glutinous rice flour as additive for producing silicon carbide ceramic via pressureless solid-state sintering","authors":"A. Jinnapat, Auamporn Rattanasing, Nithiwach Nawaukkaratharnant, Kritkeaw Somton, K. Dateraksa","doi":"10.55713/jmmm.v34i1.1939","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1939","url":null,"abstract":"This research aimed to investigate the possibility of using the mixture of boric acid and glutinous rice flour as a cost-efficient alternative additive for producing silicon carbide (SiC) ceramic sintered at 1800℃ via pressureless solid-state sintering. The results indicated that the addition of boric acid- glutinous rice flour mixture (10 wt%) in an appropriate ratio (0.5 by molar ratio) into the SiC mixture (90 wt%) enhanced the densification and flexural strength of sintered SiC samples. However, increasing boric acid/glutinous rice flour ratio reduces density and flexural strength. The 5.45 wt% carbon content was sufficient to remove the oxide layer of the SiC surface and improve the properties of SiC ceramic. In summary, the boric acid-glutinous rice flour mixture has a high potential to be used as an additive for producing dense and porous SiC ceramics via pressureless solid-state sintering.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"38 11-12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140229327","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}
Pub Date : 2024-02-02DOI: 10.55713/jmmm.v34i1.1813
A. A. Kharisma, H. Rudianto, Achmad Benny Mutiara, Sulistyo Puspitodjati, F. Latief, A. Wismogroho, W. Widayatno, Didik Aryanto, C. Firdharini
Titanium alloys are currently widely explored and produced for applications in various engineering fields. Alloying metal elements such as Mo, Cu, and Mn bring more advantages among them to help improve the mechanical properties of titanium alloys. This study is intended for the evaluation of mechanical properties through compression and hardness testing performed on a Ti-10Mo alloy with copper addition by powder metallurgy. Ti-10Mo alloys with the addition of copper contents of 3 wt% Cu, 6 wt% Cu, and 9 wt% Cu were prepared to optimize the properties of Ti-10Mo-xCu alloys. With the addition of 3 wt% copper, the compressive strength increased to 577 MPa, which is the maximum compressive strength in this study. On the other hand, with 6 wt% and 9 wt% Cu addition, the compressive strength became 140 MPa and 201 MPa, respectively. A Ti-10Mo alloy with a 3 wt% copper content was able to achieve the maximum hardness of 576 HV. In short, the addition of 3 wt% copper successfully increased the compressive strength as well as the hardness of the prepared titanium alloys.
{"title":"The effects of copper on the mechanical properties of Ti-10Mo alloy prepared by powder metallurgy method","authors":"A. A. Kharisma, H. Rudianto, Achmad Benny Mutiara, Sulistyo Puspitodjati, F. Latief, A. Wismogroho, W. Widayatno, Didik Aryanto, C. Firdharini","doi":"10.55713/jmmm.v34i1.1813","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1813","url":null,"abstract":"Titanium alloys are currently widely explored and produced for applications in various engineering fields. Alloying metal elements such as Mo, Cu, and Mn bring more advantages among them to help improve the mechanical properties of titanium alloys. This study is intended for the evaluation of mechanical properties through compression and hardness testing performed on a Ti-10Mo alloy with copper addition by powder metallurgy. Ti-10Mo alloys with the addition of copper contents of 3 wt% Cu, 6 wt% Cu, and 9 wt% Cu were prepared to optimize the properties of Ti-10Mo-xCu alloys. With the addition of 3 wt% copper, the compressive strength increased to 577 MPa, which is the maximum compressive strength in this study. On the other hand, with 6 wt% and 9 wt% Cu addition, the compressive strength became 140 MPa and 201 MPa, respectively. A Ti-10Mo alloy with a 3 wt% copper content was able to achieve the maximum hardness of 576 HV. In short, the addition of 3 wt% copper successfully increased the compressive strength as well as the hardness of the prepared titanium alloys.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"63 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139683599","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}
Pub Date : 2024-01-30DOI: 10.55713/jmmm.v34i1.1787
A. Er-rafai, Y. Alaoui, M. Laourayed, M. Ounacer, Mouloud El Moudane, Mohammed Sajieddine, Abdelkbir Bellaouchou
The relationships between the properties and structure of xFe2O3-(40-x)K2O-10MoO3-50P2O5 glasses have been reported in this paper. Homogeneous glasses are formed for different Fe2O3 contents. The density and molar volume evolution of these glasses shows that Fe2O3 acts as a glass former and strengthens the structural bonds of the glass. Experimental 57Fe Mössbauer spectroscopy graphs suggest the existence of divalent Iron (FeII) and trivalent Iron (FeIII). The boost in chemical durability agrees with the growth in glass transition temperature due to more powerful bonding in the structural network. P-O-Fe bonds replace P-O-P bonds when Fe2O3 is present in the phosphate network.
{"title":"A contribution to the exploration of the chemical durability, thermal stability, and structural ability of glasses from the Fe(_{2})O(_{3})-K(_{2})O-MoO(_{3})-P(_{2})O(_{5}) quaternary system","authors":"A. Er-rafai, Y. Alaoui, M. Laourayed, M. Ounacer, Mouloud El Moudane, Mohammed Sajieddine, Abdelkbir Bellaouchou","doi":"10.55713/jmmm.v34i1.1787","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1787","url":null,"abstract":"The relationships between the properties and structure of xFe2O3-(40-x)K2O-10MoO3-50P2O5 glasses have been reported in this paper. Homogeneous glasses are formed for different Fe2O3 contents. The density and molar volume evolution of these glasses shows that Fe2O3 acts as a glass former and strengthens the structural bonds of the glass. Experimental 57Fe Mössbauer spectroscopy graphs suggest the existence of divalent Iron (FeII) and trivalent Iron (FeIII). The boost in chemical durability agrees with the growth in glass transition temperature due to more powerful bonding in the structural network. P-O-Fe bonds replace P-O-P bonds when Fe2O3 is present in the phosphate network.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"61 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140485868","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}
Incorporating novel bio-mineral materials of silicone-arrowroot modified starch (SA) is an environmentally friendly technique to create compressed powder, thereby integrating biodiversity with sustainability and responding to the Bio-Circular-Green (BCG) economy. The SA had improved flowability and water resistance compared with non-modified arrowroot flour (A0), concurring with the Fourier Transform Infrared (FTIR), scanning electron microscope (SEM) analyses that indicated more hydrophobic properties. To investigate the formulated dust and compressed powder, three types of binders including magnesium stearate (Ms), isopropyl myristate (Im), and mineral oil (Mo) were examined. Powder samples of all binders at each concentration gave high water resistance with floating time of more than 15 min and high compressibility at 37.88% ± 0.91% to 42.59% ± 0.28% Carr’s index value and 1.61 ± 0.02 for the Hausner ratio. The hardness was 72.53 g ± 3.25 g to 98.00 g ± 3.78 g and drop test results differed depending on the density and adhesion properties of each formulation. The color stability was acceptable and not statistically significantly different when using different binders. Microbiological analysis of total bacteria count, yeast and mold in the silicone-arrowroot modified starch and pressed powder were <10 CFU∙g–1, while non fecal coliform, fecal coliform, Candida albicans, Staphylococcus aureus, and Clostridium spp. were not found.
将新型生物矿物质材料硅-箭杆改性淀粉（SA）作为一种环保技术用于制造压缩粉，从而将生物多样性与可持续发展相结合，并响应生物循环绿色（BCG）经济。与未改性的箭根粉（A0）相比，硅淀粉具有更好的流动性和耐水性，傅立叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分析也表明硅淀粉具有更强的疏水性。为了研究配制的粉尘和压缩粉末，研究了三种类型的粘合剂，包括硬脂酸镁（Ms）、肉豆蔻酸异丙酯（Im）和矿物油（Mo）。各种浓度的所有粘合剂粉末样品都具有较高的耐水性，漂浮时间超过 15 分钟，可压缩性较高，卡尔指数值为 37.88% ± 0.91% 至 42.59% ± 0.28%，豪斯纳比率为 1.61 ± 0.02。硬度为 72.53 g ± 3.25 g 至 98.00 g ± 3.78 g，滴落测试结果因每种配方的密度和粘附性而异。在使用不同粘合剂时，颜色稳定性是可以接受的，在统计学上没有明显差异。微生物分析显示，硅胶-蓍草变性淀粉和压制粉末中的细菌总数、酵母菌和霉菌均小于 10 CFU∙g-1，而非粪大肠菌群、粪大肠菌群、白色念珠菌、金黄色葡萄球菌和梭状芽孢杆菌均未检出。
{"title":"Incorporating novel bio-mineral materials of silicone-arrowroot modified starch for compressed powder","authors":"Pirada Sudprasert, Ananthaya Sansawat, Piangkhwan Kruapoo","doi":"10.55713/jmmm.v34i1.1803","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1803","url":null,"abstract":"Incorporating novel bio-mineral materials of silicone-arrowroot modified starch (SA) is an environmentally friendly technique to create compressed powder, thereby integrating biodiversity with sustainability and responding to the Bio-Circular-Green (BCG) economy. The SA had improved flowability and water resistance compared with non-modified arrowroot flour (A0), concurring with the Fourier Transform Infrared (FTIR), scanning electron microscope (SEM) analyses that indicated more hydrophobic properties. To investigate the formulated dust and compressed powder, three types of binders including magnesium stearate (Ms), isopropyl myristate (Im), and mineral oil (Mo) were examined. Powder samples of all binders at each concentration gave high water resistance with floating time of more than 15 min and high compressibility at 37.88% ± 0.91% to 42.59% ± 0.28% Carr’s index value and 1.61 ± 0.02 for the Hausner ratio. The hardness was 72.53 g ± 3.25 g to 98.00 g ± 3.78 g and drop test results differed depending on the density and adhesion properties of each formulation. The color stability was acceptable and not statistically significantly different when using different binders. Microbiological analysis of total bacteria count, yeast and mold in the silicone-arrowroot modified starch and pressed powder were <10 CFU∙g–1, while non fecal coliform, fecal coliform, Candida albicans, Staphylococcus aureus, and Clostridium spp. were not found.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"673 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140482752","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 purpose of this research was to enhance the surface of linear low-density polyethylene (LLDPE) film by using single and hybrid nucleating agents to reduce fat stains from food adherence on the film surface for easy rinsing before recycling, consequently reducing energy consumption before recycling. The process begins with the preparation of a high-concentration masterbatch of LLDPE with nucleating agents and polyethylene glycol (PEG), followed by blown film and test analysis. The results showed that both single and hybrid nucleating agents resulted in substantial modifications in the surface characteristics of the film. The altered surface texture of the film makes fat stains easy to remove. In addition, the use of hybrid nucleating agents resulted in considerable roughness on the film's surface. It can calculate the average roughness (Ra) from atomic force microscopy (AFM) images, which is very low at 4.7 nm, and the roughness is consistent. The contact angle was 99.17 degrees, and the percentage of crystallinity was clearly higher than that of a single nucleating agent. As a result, the fat stains on the film surface are easier to remove. The visual appearance, morphology, functional group, and mechanical properties of the films, on the other hand, were not significantly different. In summary, using a nucleating agent helped to rinse fat stains from the film easily.
{"title":"LLDPE film development surface with nucleating agents to reduce fat stains from food adherence on the film surface for easy rinsing before recycling","authors":"Nattapong Pinpru, Chiranicha Ninthap, Supang Sripraphot, Supharada Khaisaat","doi":"10.55713/jmmm.v34i1.1807","DOIUrl":"https://doi.org/10.55713/jmmm.v34i1.1807","url":null,"abstract":"The purpose of this research was to enhance the surface of linear low-density polyethylene (LLDPE) film by using single and hybrid nucleating agents to reduce fat stains from food adherence on the film surface for easy rinsing before recycling, consequently reducing energy consumption before recycling. The process begins with the preparation of a high-concentration masterbatch of LLDPE with nucleating agents and polyethylene glycol (PEG), followed by blown film and test analysis. The results showed that both single and hybrid nucleating agents resulted in substantial modifications in the surface characteristics of the film. The altered surface texture of the film makes fat stains easy to remove. In addition, the use of hybrid nucleating agents resulted in considerable roughness on the film's surface. It can calculate the average roughness (Ra) from atomic force microscopy (AFM) images, which is very low at 4.7 nm, and the roughness is consistent. The contact angle was 99.17 degrees, and the percentage of crystallinity was clearly higher than that of a single nucleating agent. As a result, the fat stains on the film surface are easier to remove. The visual appearance, morphology, functional group, and mechanical properties of the films, on the other hand, were not significantly different. In summary, using a nucleating agent helped to rinse fat stains from the film easily.","PeriodicalId":502897,"journal":{"name":"Journal of Metals, Materials and Minerals","volume":"19 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140488341","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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