Journal of Supercritical Fluids最新文献_第6页

Response surface optimization for supercritical carbon dioxide extraction of Korarima (Aframomum corrorima) seed oil and its antibacterial activity evaluation 超临界二氧化碳萃取科拉利马（Aframomum corrorima）种子油及其抗菌活性评价的响应面优化

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-19 DOI: 10.1016/j.supflu.2024.106411

Mulugeta Guta, Huijun Tan, Yaping Zhao

{"title":"Response surface optimization for supercritical carbon dioxide extraction of Korarima (Aframomum corrorima) seed oil and its antibacterial activity evaluation","authors":"Mulugeta Guta, Huijun Tan, Yaping Zhao","doi":"10.1016/j.supflu.2024.106411","DOIUrl":"10.1016/j.supflu.2024.106411","url":null,"abstract":"<div><div>Oils extracted from natural plants are valuable resources because of their diverse biocidal activity against microorganisms. This paper reports, for the first time, supercritical CO<sub>2</sub> extraction of oil from Korarima (<em>Aframomum corrorima</em>) seeds and its antibacterial activity evaluation. The influences of pressure, temperature, and extraction time on the yield of supercritical CO<sub>2</sub>-extracted oil (scCO<sub>2</sub>-extracted oil) were optimized using the Response Surface Methodology. Under the optimal extraction conditions of 46 °C, 15.5 MPa, and 147 min, the extraction yield reached 1.60±0.04 %, consistent with the theoretical value of 1.58 %. The compositions of the scCO<sub>2</sub>-extracted oil were identified by GC-MS, primarily consisting of nerolidol (33.97–41.20 %), geraniol (23.08–24.50 %), and α-terpinene (8.90–9.06 %). The oil exhibited significant antibacterial activity against <em>Staphylococcus. aureus</em> with a minimum inhibitory concentration of 1 mg·mL<sup>−1</sup>. This study highlights the potential applications of supercritical CO<sub>2</sub> extraction technology for extracting Korarima seed oil and its use as an antibacterial ingredient in cosmetics and pharmaceuticals.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106411"},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002468/pdfft?md5=bd3f2f0442e2635ab13aaeb5bc35c480&pid=1-s2.0-S0896844624002468-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Experimental investigation of the pressure drop of CO2 flow at supercritical pressures in a heated 4 mm smooth pipe with different orientations 超临界压力下二氧化碳流在不同方向的 4 毫米光滑加热管中的压降实验研究

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-18 DOI: 10.1016/j.supflu.2024.106407

Konstantinos Theologou, Rainer Mertz, Jörg Starflinger

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Effect of supercritical CO2 drying variables and gel composition on the textural properties of cellulose aerogels 超临界二氧化碳干燥变量和凝胶成分对纤维素气凝胶纹理特性的影响

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-18 DOI: 10.1016/j.supflu.2024.106414

Noelia D. Machado , María L. Goñi , Nicolás A. Gañán

{"title":"Effect of supercritical CO2 drying variables and gel composition on the textural properties of cellulose aerogels","authors":"Noelia D. Machado , María L. Goñi , Nicolás A. Gañán","doi":"10.1016/j.supflu.2024.106414","DOIUrl":"10.1016/j.supflu.2024.106414","url":null,"abstract":"<div><div>Cellulose aerogels are interesting platforms for biomedical and drug delivery applications, due to their biocompatibility, biodegradability, water absorption capacity, and good textural properties. Supercritical CO<sub>2</sub> drying has been proven as an efficient technology for obtaining aerogels and preserving the porous structure. In this work, the effect of relevant process variables (CO<sub>2</sub> density, depressurization rate, and intermediate depressurization mode) and gel composition on the textural properties of cellulose aerogels is studied. Experiments are performed in batch-mode, and aerogel monoliths are characterized in terms of apparent density, porosity, specific surface area, and crystalline morphology. Water uptake in different buffer solutions is also evaluated. The use of thiourea in the gel formation leads to lower porosity. On the other hand, higher porosity and surface area are obtained when depressurization is slow and the system is only partially depressurized between drying cycles. Aerogels showed a good and fast water uptake capacity, regardless of the pH (200–500 %).</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106414"},"PeriodicalIF":3.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002493/pdfft?md5=ead4f2572c1445030d3d7097f9667018&pid=1-s2.0-S0896844624002493-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Phase boundaries and copolymerization of acrylic acid + butyl methacrylate in supercritical carbon dioxide under high-pressure single-fluid initiation 高压单流体引发的超临界二氧化碳中丙烯酸+甲基丙烯酸丁酯的相界和共聚作用

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-17 DOI: 10.1016/j.supflu.2024.106412

Ramses S. Meleán Brito , Joana E. Tasque , Juan M. Padró , Gerardo Martínez Delfa , Miriam C. Strumia , Facundo Mattea , Juan M. Giussi , Juan M. Milanesio

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Micronization of ciprofloxacin by the Supercritical Antisolvent (SAS) Technique 利用超临界反溶剂（SAS）技术微粉化环丙沙星

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-17 DOI: 10.1016/j.supflu.2024.106413

Fouad Zahran , Pablo Marzal , Helga K. Ruiz , Eduardo Pérez , Lourdes Calvo , Albertina Cabañas

{"title":"Micronization of ciprofloxacin by the Supercritical Antisolvent (SAS) Technique","authors":"Fouad Zahran , Pablo Marzal , Helga K. Ruiz , Eduardo Pérez , Lourdes Calvo , Albertina Cabañas","doi":"10.1016/j.supflu.2024.106413","DOIUrl":"10.1016/j.supflu.2024.106413","url":null,"abstract":"<div><div>Ciprofloxacin is a broad-spectrum antibiotic that is proposed for pulmonary administration. In this work micronization of ciprofloxacin was performed by the Supercritical Antisolvent Technique (SAS) using ciprofloxacin base (CIP) in ethanol/acetic acid and ciprofloxacin hydrochloride salt (CIP·HCl) in methanol at 40–60 ºC and 100–150 bar. Yields ranged from 40 % to 90 %. CIP precipitated incorporating acetate whilst CIP·HCl precipitated as the AH1 anhydrous form. CIP and CIP·HCl particles exhibited an acicular morphology (0.2–0.9 μm wide × 1–4 μm long). Micronization adding lactose, PVP K-10 and K-30 modified the precipitate morphology. CIP·HCl:lactose and CIP·HCl:PVP K-30 at a 4:1 drug:excipient mass ratio precipitated like flakes. CIP·HCl:PVP K-10 precipitated as submicron globular particles suitable for oral formulation. Increasing the PVP content, the morphology changed to sheets and flakes, which could be used for pulmonary administration. The antibacterial activity of the samples for <em>Staphylococcus epidermidis</em> was confirmed.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106413"},"PeriodicalIF":3.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002481/pdfft?md5=13d486dd42dd5050356e46807bcdecd3&pid=1-s2.0-S0896844624002481-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Lipase-catalyzed synthesis of poly(ω-pentadecalactone-co-globalide) in supercritical carbon dioxide 在超临界二氧化碳中脂肪酶催化合成聚(ω-十五内酯-共全球苷)

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-16 DOI: 10.1016/j.supflu.2024.106409

Roseny D. Santos , Evertan A. Rebelatto , Camila Guindani , Heloísa B. Madalosso , Leandro Scorsin , Diego A. Mayer , J. Vladimir Oliveira

{"title":"Lipase-catalyzed synthesis of poly(ω-pentadecalactone-co-globalide) in supercritical carbon dioxide","authors":"Roseny D. Santos , Evertan A. Rebelatto , Camila Guindani , Heloísa B. Madalosso , Leandro Scorsin , Diego A. Mayer , J. Vladimir Oliveira","doi":"10.1016/j.supflu.2024.106409","DOIUrl":"10.1016/j.supflu.2024.106409","url":null,"abstract":"<div><div>This work investigates the enzymatic ring-opening polymerization of poly(ω-pentadecalactone-co-globalide) using supercritical carbon dioxide as a solvent. Copolymerizations were carried out in a high-pressure variable-volume view cell to evaluate the influence of CO<sub>2</sub>:monomers mass ratios and the use of chloroform as a cosolvent. Also, Novozym® 435 and Lipura® Flex were compared as catalysts. The highest molar mass obtained with the use of a cosolvent (M<sub>n</sub> = 24,380 g mol<sup>−1</sup>) was achieved in the 1:2:1 (CO<sub>2</sub>:monomers:chloroform) condition, reflecting the combined effect of the cosolvent and a higher concentration of the monomers, while reactions without it showed better results for molar mass (M<sub>n</sub> up to 27,902 g mol<sup>−1</sup>). Dispersity was higher when a cosolvent was used (Dispersity up to 7.51) than reactions with supercritical carbon dioxide only (Dispersity up to 5.36). Monomer conversions above 97 % and reaction yields from 55.77 wt% up to 79.61 wt% were achieved for copolymerizations with and without a cosolvent, using Novozym® 435 as catalyst. Lipura® Flex produced copolymers with high molar mass (M<sub>n</sub> up to 21,605 g mol<sup>−1</sup>), reaction yields up to 73 wt%, and monomer conversions from 82 % to 96 %.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106409"},"PeriodicalIF":3.4,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002444/pdfft?md5=a7e9759219941e1e1796c17e325bf48d&pid=1-s2.0-S0896844624002444-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Multivariate gradient structure design of flexible thermoplastic polyurethane based composite foam for enhanced electromagnetic interference shielding performance 基于热塑性聚氨酯的柔性复合泡沫的多变量梯度结构设计，提高电磁干扰屏蔽性能

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-16 DOI: 10.1016/j.supflu.2024.106410

Panfeng Shao, Xiaohan Wang, Yishen Zhao, Fangfang Zou, Guangxian Li, Xia Liao

{"title":"Multivariate gradient structure design of flexible thermoplastic polyurethane based composite foam for enhanced electromagnetic interference shielding performance","authors":"Panfeng Shao, Xiaohan Wang, Yishen Zhao, Fangfang Zou, Guangxian Li, Xia Liao","doi":"10.1016/j.supflu.2024.106410","DOIUrl":"10.1016/j.supflu.2024.106410","url":null,"abstract":"<div><p>Flexible and efficient electromagnetic interference (EMI) shielding polymer composite foams are rapidly developing, but it is difficult to avoid the deterioration of shielding properties after foaming. To solve the issue, in this work, composite foams with multivariate gradient structure of thermoplastic polyurethane (TPU) mixed with multiwalled carbon nanotubes (MWCNTs) were constructed by combining the soft-hard domains proportional gradient of TPU with filler content gradient. Gradient-structured TPU/MWCNTs foams with impedance matching layer and high reflector layer were obtained and impedance matching layer with large cells significantly reduced the density while high reflector layer with a few cells maintained relatively perfect conductive network, whose shielding efficiency was 38.2 % higher than that of unfoamed sample. Furthermore, TPU/MWCNTs composite foams presented great stability even after 1000 times bending. This special multivariate gradient structure shows potential applications in microelectronic devices and aerospace fields and is critical to the development of high-performance EMI shielding polymer foams.</p></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106410"},"PeriodicalIF":3.4,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002456/pdfft?md5=818b9351d08c460e2a02cfcba5bce4db&pid=1-s2.0-S0896844624002456-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Supercritical fluid extraction of coumarins and flavonoids from citrus peel 从柑橘皮中超临界流体萃取香豆素和黄酮类化合物

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-05 DOI: 10.1016/j.supflu.2024.106396

Juan J. Mora , Henrique M. Tavares , Romina Curbelo , Eduardo Dellacassa , Eduardo Cassel , Miriam A. Apel , Gilsane L. von Poser , Rubem M.F. Vargas

{"title":"Supercritical fluid extraction of coumarins and flavonoids from citrus peel","authors":"Juan J. Mora , Henrique M. Tavares , Romina Curbelo , Eduardo Dellacassa , Eduardo Cassel , Miriam A. Apel , Gilsane L. von Poser , Rubem M.F. Vargas","doi":"10.1016/j.supflu.2024.106396","DOIUrl":"10.1016/j.supflu.2024.106396","url":null,"abstract":"<div><p>The production manufacture of juices generates a large amount of waste consisting mainly of fruit peels. The peels are source of molecules such as coumarins and flavonoids. In this study, the peels of <em>Citrus limonia</em>, <em>Citrus deliciosa</em>, <em>Citrus latifolia</em> and <em>Citrus sinensis</em> were the raw material for supercritical fluid extraction. The Box-Behnken design was used to optimize the global yield in function of process variables. The chemical analysis of the extract was carried out by LC-MS and GC-MS. CFD was applied to the mass and momentum conservation equations in the study of supercritical extraction using citrus peels, which allowed the determination of unknown parameters of the bidimensional mathematical model. The flavonoids, nobiletin, sinensetin and tangeretin, as well as the coumarin, citropten, were identified in all species investigated. The maximum global yield obtained were 3.93 % for <em>Citrus limonia</em>, 4.18 % for <em>Citrus deliciosa</em>, 3.48 % for <em>Citrus latifolia</em> and 5.32 % for <em>Citrus sinensis</em>.</p></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106396"},"PeriodicalIF":3.4,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002316/pdfft?md5=3e32724276d589a6119ca90e6728741a&pid=1-s2.0-S0896844624002316-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142167829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Fabrication of electromagnetic wave absorption nanocomposite foam with adjustable conductive network by supercritical carbon dioxide foaming 利用超临界二氧化碳发泡技术制造具有可调导电网络的电磁波吸收纳米复合泡沫

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-09-05 DOI: 10.1016/j.supflu.2024.106395

Yishen Zhao , Kun Li , Yanru Li , Xiaoli Zhang , Shixun Zhang , Xia Liao , Jingbo Chen , Chul B. Park

{"title":"Fabrication of electromagnetic wave absorption nanocomposite foam with adjustable conductive network by supercritical carbon dioxide foaming","authors":"Yishen Zhao , Kun Li , Yanru Li , Xiaoli Zhang , Shixun Zhang , Xia Liao , Jingbo Chen , Chul B. Park","doi":"10.1016/j.supflu.2024.106395","DOIUrl":"10.1016/j.supflu.2024.106395","url":null,"abstract":"<div><p>Polymer nanocomposite foams with high electromagnetic interference (EMI) shielding performance have become the research hotspot to reduce electromagnetic wave pollution. Herein, we prepared polyethylene/poly (vinylidene fluoride)/carbon nanotubes/Fe<sub>3</sub>O<sub>4</sub>(PE/PVDF/Fe<sub>3</sub>O<sub>4</sub>/CNTs) nanocomposites and nanocomposite foams by following the simple melt blending and batch foaming procedures. The co-continuous structure system of PVDF/PE was achieved by altering the matrix ratio of PVDF/PE, while reaching a maximum average EMI shielding efficiency of ca. 28 dB for the nanocomposite with PVDF/PE ratio of 5:5. Furthermore, the largest specific EMI SE of as high as 275 dB‧cm<sup>2</sup>‧g<sup>−1</sup> was obtained for the nanocomposite foam with PVDF/PE ratio of 9: 1, in which the EMI shielding mechanism is mainly based on absorption, leading to a significantly reduction in the secondary EM wave pollution. Therefore, the preparation of porous polymer nanocomposite foams with excellent EM wave absorption performance served as a novel strategy to reduce secondary EM wave pollution that holds great potential for applications in both military and civilian fields.</p></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"215 ","pages":"Article 106395"},"PeriodicalIF":3.4,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0896844624002304/pdfft?md5=489bf1582d5d55b5498823c3484be72b&pid=1-s2.0-S0896844624002304-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142163547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Comparative analysis of biological potential of acerola by-product extracts obtained by hydrothermal and gas-expanded liquid extraction 通过水热萃取和气体膨胀液体萃取获得的针叶树副产品提取物的生物潜力比较分析

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-08-31 DOI: 10.1016/j.supflu.2024.106394

Otília Mônica Alves Borges , Karina Cesca , Laís Benvenutti , Matheus Henrique Oliveira de Sousa , Neusa Fernandes de Moura , Jose David Sánchez-Martinez , Alejandro Cifuentes , Acácio A.F. Zielinski , Patrícia Poletto

{"title":"Comparative analysis of biological potential of acerola by-product extracts obtained by hydrothermal and gas-expanded liquid extraction","authors":"Otília Mônica Alves Borges , Karina Cesca , Laís Benvenutti , Matheus Henrique Oliveira de Sousa , Neusa Fernandes de Moura , Jose David Sánchez-Martinez , Alejandro Cifuentes , Acácio A.F. Zielinski , Patrícia Poletto","doi":"10.1016/j.supflu.2024.106394","DOIUrl":"10.1016/j.supflu.2024.106394","url":null,"abstract":"<div><p>The acerola non-pomace, a by-product from the juice clarification step and rich in phenolic compounds and ascorbic acid, was investigated for its biological potential through <em>in vitro</em> tests. Extracts were obtained using hydrothermal extraction (HT) at 121°C as well as CO<sub>2</sub>-expanded ethanol (GXL) at 40°C. The GXL extract contained 159 mg/g of ascorbic acid, while the HT extract showed 70 mg/g. Catechin was found only in the HT extract, and quercetin only in the GXL extract. Both extracts exhibited similar antiglycemic potential, but the GXL extract showed twice the neuroprotective potential against acetylcholinesterase (AChE, IC<sub>50</sub>=302 μg/mL) and lipoxygenase (LOX, IC<sub>50</sub>=227 μg/mL) activities. In human breast cancer cells (MDA-MB-231), the GXL extract demonstrated better antitumor potential with an IC<sub>50</sub> of 100 μg/mL compared to 250 μg/mL for the HT extract.</p></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"214 ","pages":"Article 106394"},"PeriodicalIF":3.4,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0