Journal of Supercritical Fluids最新文献_第2页

Engineering Acyclovir-PVP coprecipitated microparticles obtained via different supercritical processes 不同超临界工艺制备的无环韦- pvp共沉淀微粒。

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.supflu.2026.106922

Maria Chiara Iannaco, Stefania Mottola, Iolanda De Marco

{"title":"Engineering Acyclovir-PVP coprecipitated microparticles obtained via different supercritical processes","authors":"Maria Chiara Iannaco, Stefania Mottola, Iolanda De Marco","doi":"10.1016/j.supflu.2026.106922","DOIUrl":"10.1016/j.supflu.2026.106922","url":null,"abstract":"<div><div>Enhancing the release profile of poorly permeable drugs remains a major challenge in the pharmaceutical field. Coprecipitation with hydrophilic polymers offers a promising strategy to address this issue. The performance of drug delivery systems is largely influenced by particle size, shape, and distribution, critical factors for achieving controlled release and enhanced bioavailability. This study compares two micronization techniques, Supercritical Assisted Atomization (SAA) and Supercritical AntiSolvent (SAS) process, for the coprecipitation of the Acyclovir/Polyvinylpyrrolidone (PVP) system. The effects of polymer-to-drug ratio and total solute concentration were evaluated with respect to particle morphology and size distribution. The thermal behavior, drug loading efficiency, and release profile of the coprecipitates were also examined. Spherical microparticles with a D<sub>50</sub> ranging from 0.54 to 0.93 μm and a D<sub>90</sub> below 1.7 μm, were successfully produced via SAA, while SAS yielded smaller particles, with D<sub>50</sub> between 0.35 and 0.68 μm and D<sub>90</sub> lower than 1.06 μm, indicating high sample uniformity. UV–vis analysis revealed high Acyclovir loading efficiencies for SAA microparticles (80–98 %), with slightly lower values for SAS (74–82 %). The in vitro release experiments showed that incorporating PVP markedly improved the drug’s release profile, supporting the effectiveness of supercritical processing methods in enhancing drug dissolution rate and potentially improving the bioavailability of compounds with permeability-limited absorption.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106922"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146109702","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

Synergistic extraction technologies: A comprehensive review of EASCFE and its applications 协同萃取技术：EASCFE及其应用综述

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.supflu.2026.106885

Rajanikanta Acharya , Mydavolu Sai Niharika , Divina Christopher, Anitha Anbalagan, Meenakshi Sundaram Muthuraman

{"title":"Synergistic extraction technologies: A comprehensive review of EASCFE and its applications","authors":"Rajanikanta Acharya , Mydavolu Sai Niharika , Divina Christopher, Anitha Anbalagan, Meenakshi Sundaram Muthuraman","doi":"10.1016/j.supflu.2026.106885","DOIUrl":"10.1016/j.supflu.2026.106885","url":null,"abstract":"<div><div>EASCFE combines enzymatic hydrolysis with Supercritical Fluid Extraction, offering an innovative and environmentally friendly method for extracting valuable bioactive compounds from complex natural matrices. This comprehensive review explores the principles, mechanisms, and operational parameters governing EASCFE, with a focus on enzyme activity modulation and the role of supercritical CO<sub>2</sub> under varying extraction conditions. Special emphasis is placed on optimizing parameters such as temperature, pH, pressure, enzyme concentration, and the use of co-solvents to improve extraction efficiency. The review also highlights the broad applications of EASCFE, including the recovery of Essential Oils, polyphenols, pigments, lipids, vitamins, and other secondary metabolites. A comparison of traditional and novel extraction methods, such as Ultrasound-Assisted Extraction and Microwave-Assisted Extraction, emphasizes the benefits of EASCFE regarding selectivity, efficiency, and the preservation of compounds. By integrating enzymatic specificity with the unique solvating power of supercritical fluids, EASCFE emerges as a promising green extraction technology with considerable promise in the food, pharmaceutical, and nutraceutical sectors. Future research directions focus on process scale-up, enzyme engineering, and the development of cost-effective industrial applications.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106885"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146109704","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

3-aminopropyltriethoxysilane (APTES) coating of glass surface using supercritical CO2: A solvent-free approach 超临界CO2玻璃表面3-氨基丙基三乙氧基硅烷（APTES）涂层：无溶剂方法

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-09 DOI: 10.1016/j.supflu.2026.106887

Asifa Awan , Peter Fojan , Rudi P. Nielsen , Morten E. Simonsen

{"title":"3-aminopropyltriethoxysilane (APTES) coating of glass surface using supercritical CO2: A solvent-free approach","authors":"Asifa Awan , Peter Fojan , Rudi P. Nielsen , Morten E. Simonsen","doi":"10.1016/j.supflu.2026.106887","DOIUrl":"10.1016/j.supflu.2026.106887","url":null,"abstract":"<div><div>A sustainable alternative to conventional silanization techniques has been investigated with supercritical carbon dioxide (scCO<sub>2</sub>) as a solvent for 3-aminopropyltriethoxysilane (APTES) deposition on glass surfaces. APTES deposition behavior was systematically evaluated under varying operational parameters, including pressure (90 and 150 bar), temperature (100–140°C), and reaction time (3 and 5 hr). FTIR spectroscopy, atomic force microscopy (AFM), and drop shape analysis (DSA) were employed to assess the chemical modifications, surface morphology, and wettability of the coated glass. Results demonstrated that temperature and pressure significantly govern the coating process, with increased pressure positively correlating with APTES deposition while elevated temperatures (100°C to 140°C) reduced deposition efficiency. AFM analysis revealed that surface roughness (Ra) increased progressively with higher pressure and longer reaction times, ranging from approximately 0.7 nm for lightly treated surfaces to over 10 nm for heavily coated samples. This confirmed the transition from uniform coatings to agglomerated surface structures at higher operating conditions. Surface energy determination demonstrated that the dispersive component of the surface energy consistently dominated, while the polar component varied with temperature, indicating a temperature-dependent modification of the surface functionalities. The density of scCO<sub>2</sub> emerged as a critical factor affecting surface deposition, with maximum deposition occurring within the 281–333 kg/m<sup>3</sup> density range. Notably, complete silanization reactions and homogeneous surfaces were achieved primarily at lower scCO<sub>2</sub> densities.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106887"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145956820","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

High-pressure extraction of marigold (Calendula officinalis); Evaluation of chemical composition, pharmacological and antitumor potential 高压提取万寿菊（Calendula officinalis）评价其化学成分、药理及抗肿瘤潜能

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.supflu.2026.106898

Mirjana Sulejmanović , Senka Vidović , Igor Jerković , Nataša Milić , Aleksandra Popović , Jelena Jeremić , Vanja Travičić , Stela Jokić , Krunoslav Aladić , Aleksandra Gavarić

{"title":"High-pressure extraction of marigold (Calendula officinalis); Evaluation of chemical composition, pharmacological and antitumor potential","authors":"Mirjana Sulejmanović , Senka Vidović , Igor Jerković , Nataša Milić , Aleksandra Popović , Jelena Jeremić , Vanja Travičić , Stela Jokić , Krunoslav Aladić , Aleksandra Gavarić","doi":"10.1016/j.supflu.2026.106898","DOIUrl":"10.1016/j.supflu.2026.106898","url":null,"abstract":"<div><div>The isolation of bioactive compounds from plants has gained significant attention due to their potential in developing novel health-promoting products. Among these, marigold (<em>Calendula officinalis</em>) is recognized for its antioxidant, hepatoprotective, and wound-healing properties. This study examined five marigold plant parts–petals (MP), calyxes (MC), calyxes with petals (MCP), stems (MS), and stems with calyxes and petals (MSCP)–extracted using supercritical carbon dioxide (scCO₂), an advanced technique that avoids toxic solvents and reduces extraction time compared to conventional methods. GC–MS analysis of the scCO₂ extracts revealed that sesquiterpenes were the predominant constituents, including δ-cadinene (19.13–26.96 %), γ-cadinene (9.62–12.92 %), t-muurolol (2.08–10.07 %), α-cadinol (1.42–5.81 %), and ledene (1.24–8.87 %). In addition, monoterpenes such as thymol (1.85–2.87 %), camphor (1.77–2.07 %), β-thujone (0.93–1.13 %), and carvacrol (0.58–1.25 %), as well as the alkane nonadecane (0.50–23.17 %), were also identified. The in vitro antitumor potential of MP, MC, and MS plant parts was evaluated in H4IIE hepatoma cells. Cell viability, morphological analysis, and colony formation assays demonstrated cytotoxic activity, with marigold calyxes showing the most pronounced effect. In addition, hepatoprotective properties were confirmed, further supporting the therapeutic relevance of marigold extracts. These findings suggest that sc-CO₂ extracts of marigold hold promise as potential antitumor agents. However, further preclinical and clinical studies are required to assess their safety, efficacy, and applicability in human therapy.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106898"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995409","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

Green preparation of polyvinyl chloride/epoxy resin blend foams using supercritical CO2 超临界CO2绿色制备聚氯乙烯/环氧树脂共混泡沫

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-29 DOI: 10.1016/j.supflu.2026.106916

Xuelin Zhang, Xiulu Gao, Qiyuan He, Haonan Chen, Yichong Chen, Ling Zhao, Dongdong Hu

{"title":"Green preparation of polyvinyl chloride/epoxy resin blend foams using supercritical CO2","authors":"Xuelin Zhang, Xiulu Gao, Qiyuan He, Haonan Chen, Yichong Chen, Ling Zhao, Dongdong Hu","doi":"10.1016/j.supflu.2026.106916","DOIUrl":"10.1016/j.supflu.2026.106916","url":null,"abstract":"<div><div>This study utilized the environmentally friendly plasticizer epoxidized soybean oil as a phthalate alternative and implemented a plasticization-curing-reinforcement strategy via epoxy resin to systematically examine the processing characteristics and supercritical carbon dioxide foaming behavior of a polyvinyl chloride/epoxy resin (PVC/EP) blend system. The incorporation of EP significantly improves the flowability and accelerates the fusion (gelation) process of PVC. The appropriate EP content reduces the complex viscosity of PVC/EP blends and enhances the processability due to the plasticization effect. After EP curing, the tensile properties of PVC/EP blends are enhanced. When the EP content reaches 20 %, the elongation at break of cured PVC/EP blend increases from 11 % to 218 %, while the tensile strength remains comparable to that of pure PVC, collectively resulting in an effective toughening effect. The plasticization effect of EP improves the foaming behavior of PVC/EP blends. When the EP content is 20 %, the cell morphology of PVC/EP blend foam is optimized and the expansion ratio is significantly increased from 5 times to 15 times. Cured PVC/EP blend foam exhibits excellent compressive properties and thermal stability. Compared to pure PVC foam, the compressive modulus, compressive strength, and initial thermal decomposition temperature increased by 340.2 %, 47.8 %, and 36 °C, respectively. This work presents a feasible strategy for producing environmentally friendly, high-performance PVC foams through EP blending and CO<sub>2</sub> foaming.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106916"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071582","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

Multi-objective optimization of a novel non-uniform variable cross-section zigzag printed circuit heat exchanger for supercritical CO2 Brayton Cycle 超临界CO2布雷顿循环非均匀变截面之字形印刷电路换热器多目标优化

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-21 DOI: 10.1016/j.supflu.2026.106904

Houdong Shi , Bingguo Zhu , Qing Zhang

{"title":"Multi-objective optimization of a novel non-uniform variable cross-section zigzag printed circuit heat exchanger for supercritical CO2 Brayton Cycle","authors":"Houdong Shi , Bingguo Zhu , Qing Zhang","doi":"10.1016/j.supflu.2026.106904","DOIUrl":"10.1016/j.supflu.2026.106904","url":null,"abstract":"<div><div>This study proposes a novel non-uniform variable cross-section zigzag printed circuit heat exchanger (UZPCHE) to address the demand for high-performance and compact heat exchangers in the precooler of the supercritical CO<sub>2</sub> Brayton cycle (SCO<sub>2</sub>-BC). Three geometric parameters including the variable diameter (<em>d</em>1) and the inner and outer chord lengths (<em>L</em>1 and <em>L</em>2) of the turning region are selected as design variables, with the Nusselt number (<em>Nu</em>), friction factor (<em>f</em>), and compactness performance (<em>Q/V</em>) as optimization objectives. A quadratic response surface model (RSM) is established using the Box–Behnken design, and grey relational analysis (GRA) is employed to elucidate the influence degree of geometric parameters on thermal–hydraulic performance. Subsequently, a multi-objective optimization framework integrating the non-dominated sorting genetic algorithm II (NSGA-II) and the technique for order preference by similarity to ideal solution (TOPSIS) is applied to derive the optimal compromise design. The results indicate that the developed RSM exhibits high predictive accuracy. The <em>d</em>1 is identified as the dominant parameter, contributing approximately 38 % to the objective functions. The optimized non-uniform variable-cross-section printed circuit heat exchanger (UZPCHE, <em>d</em>1 = 1.2 mm, <em>L</em>1 = 2.5 mm, <em>L</em>2 = 2.7 mm) exhibits superior thermohydraulic performance (PEC=1.173) compared to the traditional zigzag printed circuit heat exchanger (TZPCHE), wavy channel printed circuit heat exchanger (WAPCHE), and straight channel printed circuit heat exchanger (STPCHE). Furthermore, the optimized UZPCHE reduces the maximum equivalent stress in the solid region compared to the TZPCHE. These findings provide valuable insights for the structural optimization of printed circuit heat exchangers in supercritical CO<sub>2</sub> power systems.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106904"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014436","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

Recovery of phytochemicals from cimin black grape seeds with sub/super-critical carbon dioxide extraction 亚/超临界二氧化碳萃取法回收亚红黑葡萄籽中的植物化学物质

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-15 DOI: 10.1016/j.supflu.2026.106894

Tunahan Engin , Eyyup Karaogul , Sümeyra Al Çiçek , Ayhan Çiğdem , Duried Alwazeer , Kairat Bekbayev , Galiya Abdilova , Bakytzhan Bolkenov

{"title":"Recovery of phytochemicals from cimin black grape seeds with sub/super-critical carbon dioxide extraction","authors":"Tunahan Engin , Eyyup Karaogul , Sümeyra Al Çiçek , Ayhan Çiğdem , Duried Alwazeer , Kairat Bekbayev , Galiya Abdilova , Bakytzhan Bolkenov","doi":"10.1016/j.supflu.2026.106894","DOIUrl":"10.1016/j.supflu.2026.106894","url":null,"abstract":"<div><div>In this study, Sub/Super-Critical carbon dioxide (scCO₂) extraction and response surface methodology (RSM) were applied as mathematical modeling and optimization approaches for the recovery of phytochemicals from grape seeds. The optimal extraction conditions were determined as 80 bar pressure, 60 °C temperature, and 5 min time. The total phenolic content (TPC) of the extract obtained under these conditions was 91.86 mg GAE/100 mL extract. Antioxidant activity was determined as 13,100.3 µmol TE/100 mL extract using the DPPH method and 2 004.93 µmol TE/100 mL extract using the ABTS method. Catechin (200.997 mg/L) was the most concentrated phenolic, and chlorogenic acid was the lowest one in the extract. Additionally, the epicatechin content was 91.12 mg/L, and the total phenolic content, as determined by HPLC, was 291.84 mg/L extract. Pearson correlation analysis showed a high correlation between the results obtained and the experimental data. The results were confirmed by the color distributions in the heat map, clustering in the PCA analysis, and hierarchical analysis. These results confirm the success of the modeling and optimization. In conclusion, the pressure, temperature, and time parameters were found to be decisive for achieving high bioactivity. Sub/Super-critical extraction is an effective method for extracting bioactive compounds from agricultural by-products such as grape seeds, using a process that's both efficient and environmentally friendly.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106894"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995412","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

Sequential supercritical and pressurized liquid extraction of flavonoids from Astragalus membranaceus: Optimizing yield and preserving glycoside integrity 连续超临界和加压液体提取黄芪黄酮：优化得率和保持糖苷完整性

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.supflu.2026.106917

Marie Sajfrtová , Helena Sovová , Naděžda Vrchotová , Jan Tříska , Roman Pavela

{"title":"Sequential supercritical and pressurized liquid extraction of flavonoids from Astragalus membranaceus: Optimizing yield and preserving glycoside integrity","authors":"Marie Sajfrtová , Helena Sovová , Naděžda Vrchotová , Jan Tříska , Roman Pavela","doi":"10.1016/j.supflu.2026.106917","DOIUrl":"10.1016/j.supflu.2026.106917","url":null,"abstract":"<div><div>The root of <em>Astragalus membranaceus</em> (AR), one of the most popular Chinese herbal medicines, is used to treat various diseases. Flavonoids (FL), both glycosides and aglycons, belong to its biologically active components. The purpose of the research was to examine the effect of AR sequential extraction on the yield of flavonoids and their composition in extracts. Two high-pressure extraction methods were applied, supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE). Ethanol, methanol, ethyl acetate and water were used as CO<sub>2</sub> modifiers and solvents. The complete succession of applied extraction solvents was neat supercritical CO<sub>2</sub>, modified CO<sub>2</sub>, pressurized organic solvent and overheated water. The PLE results show an increasing yield of FL with increasing modifier polarity from ethyl acetate to ethanol and methanol, and then a decrease for water. The maximum yield of FL, 9.1 mg/100 g AR, was provided by PLE with ethanol at 120 °C and 10 MPa. Similar was the relationship between solvent power of CO<sub>2</sub> modifiers and their polarity in SFE, but the yield of FL was an order of magnitude lower. Thus, according to the FL yield, there was practically no difference between a simple PLE and more complicated sequential extraction SFE, PLE. A marked difference was however in the glycosides-to-aglycons ratio, which was higher in sequential extraction. It is hypothesized that water residue in AR is removed by SFE, preventing thus hydrolysis of glycosides during the following PLE.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106917"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048521","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

Solubility of supercritical CO2 in biopolymers PBAT and PHBV 超临界CO2在生物聚合物PBAT和PHBV中的溶解度

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-15 DOI: 10.1016/j.supflu.2026.106893

Friso G. Versteeg , Guilherme de M.R. Lima , Francesco Picchioni , Kevin M. van Geem , Pablo Druetta

{"title":"Solubility of supercritical CO2 in biopolymers PBAT and PHBV","authors":"Friso G. Versteeg , Guilherme de M.R. Lima , Francesco Picchioni , Kevin M. van Geem , Pablo Druetta","doi":"10.1016/j.supflu.2026.106893","DOIUrl":"10.1016/j.supflu.2026.106893","url":null,"abstract":"<div><div>As environmental concerns surrounding conventional plastics continue to grow, biodegradable alternatives such as polybutylene adipate terephthalate (PBAT) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) have been and are gaining attention as promising candidates for sustainable polymeric foams production. These bioplastics offer potential for use in environmentally friendly foaming processes, particularly when paired with supercritical carbon dioxide (scCO<sub>2</sub>), a non-toxic and inert foaming agent. Understanding the solubility of CO<sub>2</sub> in these polymers is critical for optimizing the foaming conditions and material performance. In this work, the solubility of scCO<sub>2</sub> in PBAT and PHBV was experimentally determined over a temperature range of 373 K to 413 K and pressures up to 130 bar using a magnetic suspension balance (MSB). In order to interpret the results and estimate the degree of swelling, the Sanchez–Lacombe Equation of State (SL-EoS) was applied. Since the solubility of CO<sub>2</sub> can be influenced by the semi-crystalline nature of the polymers, a crystallinity correction was incorporated into the model to better reflect the interaction of CO<sub>2</sub> with the amorphous regions. This adjustment improved the agreement between experimental and calculated values, providing a more accurate representation of solubility behaviour. The developed model serves as a useful predictive tool for designing efficient and sustainable foaming processes using PBAT and PHBV.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106893"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981961","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

Phosphate-induced corrosion of nickel alloys in supercritical water: Mechanistic insights into passivation and accelerated corrosion at elevated temperatures 镍合金在超临界水中的磷酸盐诱导腐蚀：在高温下钝化和加速腐蚀的机理

IF 4.4 3区工程技术

Journal of Supercritical Fluids Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.supflu.2026.106901

Shaoming Ding , Yanhui Li , Wang Zhu , Limei Xing , Qibo Wang , Zhouyang Bai , Pengfei Gao , Fengxiao Hou

{"title":"Phosphate-induced corrosion of nickel alloys in supercritical water: Mechanistic insights into passivation and accelerated corrosion at elevated temperatures","authors":"Shaoming Ding , Yanhui Li , Wang Zhu , Limei Xing , Qibo Wang , Zhouyang Bai , Pengfei Gao , Fengxiao Hou","doi":"10.1016/j.supflu.2026.106901","DOIUrl":"10.1016/j.supflu.2026.106901","url":null,"abstract":"<div><div>This study examines the corrosion behavior of Inconel 600 and Inconel 625 alloys in supercritical water environments containing phosphates, with a focus on the temperature-dependent effects of phosphate in both dissolved and molten states. At 400 °C, dissolved phosphate acts as a passivating agent, forming protective metal phosphate films that reduce corrosion. At 600 °C, the low solubility of phosphate causes it to precipitate into a molten state. This significantly accelerates corrosion by dissolving the protective oxide film and enhancing ion diffusion, increasing the film thickness from 0.16 μm to 0.675 μm. The higher Cr content in Inconel 625 resulted in an 65.9 % reduction in oxide thickness relative to Inconel 600, indicating enhanced oxidation resistance. The core theoretical innovation of this study lies in identifying the dual role of phosphate in alloy corrosion: acting as a passivating agent at lower temperatures and as a corrosion accelerator at higher temperatures. This study further clarifies the competitive relationship between phosphate and oxygen, the mechanism by which molten salts accelerate corrosion, and the synergistic molten corrosion effect of Na⁺. The findings provide valuable insights into corrosion protection strategies for supercritical water oxidation systems, contributing to the optimization of material design in extreme environments.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"232 ","pages":"Article 106901"},"PeriodicalIF":4.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995407","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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