Journal of Supercritical Fluids最新文献_第4页

Precipitation of micro and nanosilica and PdO/silica particles from SEDS technique using supercritical CO2 超临界CO2沉淀法制备微、纳米二氧化硅和PdO/二氧化硅颗粒

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-28 DOI: 10.1016/j.supflu.2024.106507

Alexander Junges , Thais Feiden , Bruno Fischer , Marcos Hiroiuqui Kunita , Silvana Mattedi , Claudio Dariva , Silvia Maria Egues , Eunice Valduga , Elton Franceschi

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Sequential extraction of industrial spent coffee grounds using pressurized fluids as solvents 用加压流体作溶剂连续提取工业废咖啡渣

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Journal of Supercritical Fluids Pub Date : 2024-12-27 DOI: 10.1016/j.supflu.2024.106503

Akel F. Kanaan, Kallynca C. dos Santos, Maria A.H. Menezes, Fabiane Hamerski, Fernando A.P. Voll, Marcos L. Corazza

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A novel approach to investigating the relation between color strength and relative dye concentration and to controllably modifying the color strength of dyed polyester fabrics through supercritical fluid treatment 提出了一种研究染色涤纶织物色强与染料相对浓度关系的新方法，并通过超临界流体处理对染色涤纶织物色强进行了可控改性

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Journal of Supercritical Fluids Pub Date : 2024-12-27 DOI: 10.1016/j.supflu.2024.106504

Jianhua Ren , Mitsuru Mizuno , Isao Tabata , Teruo Hori , Kazumasa Hirogaki

{"title":"A novel approach to investigating the relation between color strength and relative dye concentration and to controllably modifying the color strength of dyed polyester fabrics through supercritical fluid treatment","authors":"Jianhua Ren , Mitsuru Mizuno , Isao Tabata , Teruo Hori , Kazumasa Hirogaki","doi":"10.1016/j.supflu.2024.106504","DOIUrl":"10.1016/j.supflu.2024.106504","url":null,"abstract":"<div><div>Widely utilized polyester fibers generally have excellent color fastness, making it quite challenging to controllably modify their color strength (<em>K</em>/<em>S</em> value), especially in regulated decolorization. In this study, the relation between the color strength and the relative dye concentration of dyed polyester fabrics was investigated based on the principle that dyes may migrate and reach redistribution equilibrium through supercritical carbon dioxide fluid treatment. The results demonstrated that the relation agreed well with an exponential decay fitting, allowing for the controllable modification of the color strength of dyed polyester fabrics using the derived regression formulas. Furthermore, the correlation between the residual dye in the supercritical fluid treatment vessel and the color strength of the previously treated fabric was clarified. To verify the universality of the above strategies, three dyes with representative anthraquinone, heterocyclic, and azo structures were employed in this study. Furthermore, it was observed that the dyes were evenly diffused throughout the polyester fibers following the supercritical fluid treatment, promising the fibers’ good color fastness. These findings might be significant for exploring the dyeing behavior of fibers in supercritical fluids, stimulating the reutilization of colored polyester and carbon neutrality of textiles, and expanding the potential applications of supercritical fluid technology.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106504"},"PeriodicalIF":3.4,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929236","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 CO2 impregnation of nanodiamonds into polymethylmethacrylate film and the film’s optical property 超临界CO2浸渍纳米金刚石制备聚甲基丙烯酸甲酯薄膜及其光学性能

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-27 DOI: 10.1016/j.supflu.2024.106506

Jinhua Hu, Kunitoyo Osawa, Kaoru Tada, Kentaro Taki, Hirohisa Uchida, Kazuhiro Tamura

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Optimization of subcritical water extraction parameters of phlorotannins from brown alga (Ecklonia stolonifera): Bipotentialities and possible applications 棕藻绿皮单宁亚临界水提取工艺的优化：双电位及应用前景

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-26 DOI: 10.1016/j.supflu.2024.106502

Ye-Seul Park , Vikash Chandra Roy , Jin-Seok Park , Wei Zhang , Byung-Soo Chun

{"title":"Optimization of subcritical water extraction parameters of phlorotannins from brown alga (Ecklonia stolonifera): Bipotentialities and possible applications","authors":"Ye-Seul Park , Vikash Chandra Roy , Jin-Seok Park , Wei Zhang , Byung-Soo Chun","doi":"10.1016/j.supflu.2024.106502","DOIUrl":"10.1016/j.supflu.2024.106502","url":null,"abstract":"<div><div>The study aimed to identify the optimal subcritical water extraction (SWE) parameters for phlorotannin (marine polyphenols) from <em>Ecklonia stolonifera</em> using response surface methodology (RSM). The reaction temperature, time, and the solid-to-solvent ratio were optimized, and the best extraction conditions were 198.5°C, 36.21 min, and 12.23 g/mL, respectively. Under optimal conditions, the total phlorotannin content (TPC) was 50.01 ± 0.12 mg phloroglucinol/g dried seaweed powder. The results indicated that the <em>E. stolonifera</em> extract showed substantial ABTS<sup>+</sup>, DPPH radical scavenging, and FRAP activities (70.94 ± 0.15, 60.03 ± 0.35, and 29.45 ± 0.39 mg Trolox equivalent/g dried seaweed powder, respectively). The resulting extract exhibited potential antihypertensive (95.87 % ± 0.01 %), α-glucosidase inhibitory (69.29 % ± 1.83 %), and anti-inflammatory (68.55 % ± 0.98 %) activity compared with the positive control. In conclusion, this study underscores the immense potential of <em>E. stolonifera</em> as a valuable nutraceutical material when prepared by the SWE method.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106502"},"PeriodicalIF":3.4,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929252","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}

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Supercritical CO2 assisted metallization of polyethylene terephthalate yarns with various twist number 不同捻数聚对苯二甲酸乙二醇酯纱线的超临界CO2辅助金属化

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-24 DOI: 10.1016/j.supflu.2024.106501

Hikaru Kondo , Tomoyuki Kurioka , Kazuhiro Shibata , Takumi Suda , Wan-Ting Chiu , Chun-Yi Chen , Yuko Mima , Roka Ueno , Arisa Jinno , Hiromichi Kurosu , Masato Sone , Tso-Fu Mark Chang

{"title":"Supercritical CO2 assisted metallization of polyethylene terephthalate yarns with various twist number","authors":"Hikaru Kondo , Tomoyuki Kurioka , Kazuhiro Shibata , Takumi Suda , Wan-Ting Chiu , Chun-Yi Chen , Yuko Mima , Roka Ueno , Arisa Jinno , Hiromichi Kurosu , Masato Sone , Tso-Fu Mark Chang","doi":"10.1016/j.supflu.2024.106501","DOIUrl":"10.1016/j.supflu.2024.106501","url":null,"abstract":"<div><div>This study investigates the metallization of polyethylene terephthalate (PET) yarns with varying twist numbers using the supercritical CO<sub>2</sub> (scCO<sub>2</sub>) catalyzation process. The research includes an analysis of the impact on surface morphology, crystallinity, and electrical resistance. The crystallinity of the PET yarns is affected by treatment in pure scCO<sub>2</sub> and scCO<sub>2</sub> containing palladium hexafluroacetylacetonate (Pd(hfa)<sub>2</sub>), which is the scCO<sub>2</sub> catalyzation process and Pd(hfa)<sub>2</sub> is used as the Pd catalyst source. Furthermore, this study uncovers the influence of the twist number on the fiber surfaces where the fibers come into contact in the twisted yarn. Specifically, the electrical resistance decreases with an increase in the twist number, attributed to an increase in conductive pathways and improved contact points between the fibers.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106501"},"PeriodicalIF":3.4,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889234","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}

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Effect of ethanol on supercritical CO2 solvent densities 乙醇对超临界CO2溶剂密度的影响

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-24 DOI: 10.1016/j.supflu.2024.106491

Clément Sevestre, Julien Chabanon, Thomas Deleau, Christophe Coquelet

{"title":"Effect of ethanol on supercritical CO2 solvent densities","authors":"Clément Sevestre, Julien Chabanon, Thomas Deleau, Christophe Coquelet","doi":"10.1016/j.supflu.2024.106491","DOIUrl":"10.1016/j.supflu.2024.106491","url":null,"abstract":"<div><div>The development of new industrial applications in the pharmaceutical, food, and cosmetic fields uses supercritical carbon dioxide as a solvent or antisolvent in their processes for extracting non-polar molecules. Ethanol (<span><math><mtext>EtOH</mtext></math></span>) is added in small quantities to isolate a polar molecule during a unit operation by solubilization or precipitation. Density measurements in pure carbon dioxide (<span><math><msub><mrow><mtext>CO</mtext></mrow><mrow><mn>2</mn></mrow></msub></math></span>) and in binary <span><math><msub><mrow><mtext>CO</mtext></mrow><mrow><mn>2</mn></mrow></msub></math></span>-<span><math><mtext>EtOH</mtext></math></span> mixtures with mass compositions (<span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><msub><mrow><mtext>CO</mtext></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>99</mn></mrow></math></span> and <span><math><mrow><msub><mrow><mi>w</mi></mrow><mrow><msub><mrow><mtext>CO</mtext></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>98</mn></mrow></math></span>) were carried out using a vibrating tube densimeter. The isotherms were determined at temperatures of 303, 308, and 313 K, above the critical temperature, and for a pressure range from 5 to 10 MPa. Fine modeling around the critical point was performed using cubic equations of state with two or three parameters (Peng–Robinson and Coquelet–El Abbadi–Houriez EoS). The Huron-Vidal mixing rule coupled with the NRTL model was employed. To enhance the prediction around the critical point of pure carbon dioxide and binary <span><math><msub><mrow><mtext>CO</mtext></mrow><mrow><mn>2</mn></mrow></msub></math></span>-<span><math><mtext>EtOH</mtext></math></span> mixtures, White’s correction method was used. The results for pure supercritical carbon dioxide show modeling performance with a deviation of 5.8% around the critical point.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106491"},"PeriodicalIF":3.4,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142990559","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}

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Supercritical CO2-assisted preparation of catalytically-active Pd/Ni nanoparticle-embedded carbon from a metal-organic framework 超临界co2辅助从金属有机框架中制备催化活性Pd/Ni纳米颗粒嵌入碳

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-19 DOI: 10.1016/j.supflu.2024.106500

Kiyoshi Matsuyama , Masashi Eiro , Ayano Shoji , Takafumi Kato

{"title":"Supercritical CO2-assisted preparation of catalytically-active Pd/Ni nanoparticle-embedded carbon from a metal-organic framework","authors":"Kiyoshi Matsuyama , Masashi Eiro , Ayano Shoji , Takafumi Kato","doi":"10.1016/j.supflu.2024.106500","DOIUrl":"10.1016/j.supflu.2024.106500","url":null,"abstract":"<div><div>A metal nanoparticle (NP)-carbon composite derived from metal-organic frameworks (MOFs) has garnered significant attention for its high catalytic activity. This study develops a simple method for preparing Pd/Ni NP-embedded carbon from MOFs. Palladium(Ⅱ) acetate (Pd(OAc)<sub>2</sub>) is used as the precursor for Pd NPs and is loaded into the pores of Ni-MOF-74 using supercritical carbon dioxide (scCO₂) assisted immobilization. Pd/Ni NPs are prepared by reduction and pyrosis of Pd(OAc)<sub>2</sub>-loaded Ni-MOF-74. Scanning transmission electron microscopy (STEM) clearly reveals that the Pd/Ni NPs are successfully immobilized in the carbon (Pd/Ni@C) and dispersed with sizes around 10 nm. Pd/Ni@C demonstrates high catalytic activity and high durability in Suzuki–Miyaura coupling reactions, despite having lower Pd content (4.7 wt%) than commercially available Pd@C (10 wt%). The active palladium species Pd(0) on Pd/Ni@C accelerated the Suzuki-Miyaura coupling reactions, because the Ni in Pd/Ni NPs played the sacrificial role to resist Pd-oxidation.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106500"},"PeriodicalIF":3.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874110","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}

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Exploring the potential of deep eutectic systems for the preservation of the chemical profile and antibacterial potential of dill (Anethum graveolens L.) supercritical CO₂ extracts 探讨深层共晶体系在保存莳萝（Anethum graveolens L.）超临界CO₂提取物的化学特征和抗菌潜力方面的潜力

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-16 DOI: 10.1016/j.supflu.2024.106499

Jelena Vladić , Igor Jerković , Valentina Pavić , Dragoljub Cvetković , Stela Jokić , Krunoslav Aladić , Kristian Pastor , Ana Rita C. Duarte

{"title":"Exploring the potential of deep eutectic systems for the preservation of the chemical profile and antibacterial potential of dill (Anethum graveolens L.) supercritical CO₂ extracts","authors":"Jelena Vladić , Igor Jerković , Valentina Pavić , Dragoljub Cvetković , Stela Jokić , Krunoslav Aladić , Kristian Pastor , Ana Rita C. Duarte","doi":"10.1016/j.supflu.2024.106499","DOIUrl":"10.1016/j.supflu.2024.106499","url":null,"abstract":"<div><div>This study evaluated the potential of deep eutectic systems (DESs) to enhance the chemical and microbiological stability, as well as the antibacterial activity of dill (<em>Anethum graveolens</em> L.) supercritical extracts, rich in carvone and limonene, over six months of storage. Various betaine-based DESs were tested for their ability to preserve the chemical integrity and enhance the antibacterial properties of dill extracts. Significant alterations in the headspace profile of extracts during storage indicated degradation reactions. The dill-Bet/LA extract system (dill extract in Bet/LA) proved most effective, significantly slowing degradation and enhancing antibacterial activity compared to the dill-control extract. Specifically, this system exhibited 20–40-fold greater efficacy against Gram-negative bacteria and 5–8-fold stronger activity against Gram-positive bacteria than the dill-control. Furthermore, the dill-Bet/LA system was also the most effective in preserving antimicrobial potency during storage, demonstrating its potential as a sustainable solution for extending the shelf life and bioactivity of dill supercritical extracts.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106499"},"PeriodicalIF":3.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874111","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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Uvaia (Eugenia pyriformis Cambess) fruit: Exploring its antioxidant potential through pressurized liquid extraction Uvaia （Eugenia pyriformis Cambess）果实：通过加压液体提取探索其抗氧化潜力

IF 3.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2024-12-16 DOI: 10.1016/j.supflu.2024.106498

Isadora de Souza Lopes , Rafael Augusto Juliato , Cristiane Conte Paim de Andrade , Ana Clara Troya Raineri Fiocco , Renata Galhardo Borguini , Manuela Cristina Pessanha de Araújo Santiago , Luiz Henrique Fasolin , Carolina Siqueira Franco Picone

{"title":"Uvaia (Eugenia pyriformis Cambess) fruit: Exploring its antioxidant potential through pressurized liquid extraction","authors":"Isadora de Souza Lopes , Rafael Augusto Juliato , Cristiane Conte Paim de Andrade , Ana Clara Troya Raineri Fiocco , Renata Galhardo Borguini , Manuela Cristina Pessanha de Araújo Santiago , Luiz Henrique Fasolin , Carolina Siqueira Franco Picone","doi":"10.1016/j.supflu.2024.106498","DOIUrl":"10.1016/j.supflu.2024.106498","url":null,"abstract":"<div><div>Uvaia (<em>Eugenia pyriformis</em> Cambess) is a Brazilian native fruit with a high concentration of phenolic compounds. In this study, we optimized the extraction of flavonoids and other phenolic compounds from uvaia pulp (U<sub>P</sub>) and seed (U<sub>S</sub>) by Pressurized Liquid Extraction (PLE) using an ethanolic solution as solvent. Both temperature and ethanol concentration enhanced the extraction of the phenolics from U<sub>P</sub> and U<sub>S</sub>. The increase in ethanol concentration decreased the yield of flavonoid extraction from U<sub>P</sub>. In the case of the U<sub>S</sub>, higher temperatures and lower ethanol percentage improved the yield of flavonoid extraction. All extracts showed high antioxidant activity under optimized conditions, especially the U<sub>S</sub> extracts (507.40 µM Trolox.g<sup>−1</sup> of dry U<sub>S</sub>). The present findings highlight the effectiveness of PLE in obtaining antioxidant extracts from U<sub>P</sub> and U<sub>S</sub>, and also contribute to the valorization of uvaia fruit and its residues.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"218 ","pages":"Article 106498"},"PeriodicalIF":3.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889233","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