TEXTILE RESEARCH JOURNAL
·
2022
·
IF 2.455
Huizhen Ke,Qin Fang,Yitong Han,Huanda Zheng,Laijiu Zheng,Yuanyuan Dong
Traditional water-based flame-retardant finishing causes serious pollution due to the use of a large number of chemicals, and color change is easily generated since the flame-retardant finishing takes place after the cotton dyeing. An eco-friendly flame-retardant finishing of dyed cotton was explored using 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), 2,2′-oxybis-(5,5-dimethyl-1,3,2,-dioxaphosphorinane-2,2′-disulfide) (5060), SiO2, DOPO/SiO2 (1:1), 5060/SiO2 (1:1) and DOPO/5060 (1:1) in supercritical CO2. The effects of finishing time and pressure as well as temperature on the flame-retarding properties of the cotton were discussed. As expected, samples with the higher weight gain rates exhibit a lower after-flame time as well as after-glow time. In different flame-retardant systems, cotton fabric finished with DOPO presents the lowest after-flame time of 20.6 s and after-glow time of 0 s at 130°C, 22 MPa and 120 min due to its biphenyl ring and O=P-O bond. Moreover, tiny fluctuations of L*, a*, b* and K/S values occurred from 32.10 to 34.24, 5.78 to 6.05, –37.89 to –37.64 and 10.59 to 10.81 when the cotton samples were treated with DOPO, 5060, SiO2, DOPO/SiO2 (1:1), 5060/SiO2 (1:1) and DOPO/5060 (1:1), proving that no significant negative role in the color property of the samples occurs after supercritical CO2 finishing.
研究领域:
纺织科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yang Wang,Sidi Wang,Zhen Li,Liwei Sun,Xiaoyu Yang,Shaokun Tang
UiO-66 nanocrystals were synthesized by supercritical reaction crystallization with anhydrous zirconium chloride as the metal precursor, terephthalic acid as the ligand, and a small amount of N,N-dimethylformamide (DMF) and formic acid as cosolvents in supercritical CO2. In our work, the product UiO-66 obtained exhibits typical octahedral morphology with a specific surface area of 1092 m2/g and concentrated micropore diameters of 0.77, 1.05, and 1.73 nm. The thermal decomposition temperature of the product is 450 °C. It was found that the adsorption selectivity of UiO-66 for Congo red is much higher than those for methylene blue and methyl orange, which can reach up to over 1300 mg/g. The adsorption process conforms to the second-order adsorption kinetics curve, and the adsorption isotherm fits into the Langmuir model. Meanwhile, the adsorbent UiO-66 possesses good cycle stability and its adsorption performance remains excellent after seven cycles.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2025
·
IF 6.4
Yapeng Dong,Yuning Liang,Bo Gao,Qun Xu
Exploring advanced technology to obtain quantum materials presenting novel and unexpected electronic states upon proper manipulation is an important research endeavor. Usually, plastic deformation can lead to some amount of disruption that can result in new physical phenomena and fascinating structures. However, how to realize efficient plasticization and manipulation to obtain irreversible variation in such materials, especially those presenting quantum material behavior, is a great challenge. Herein, we show that upon plastic deformation induced by supercritical CO2 (SC CO2) on SrZrO3, typically at a pressure of 16 MPa, SrZrO3 experiences a transition from a bulk material to a two-dimensional (2D) structure. More importantly, it can be observed that the octahedral rotation of ZrO6 is suppressed. Furthermore, plastic deformation frequently induces magnetism in SrZrO3. Via polarization characterization, SrZrO3 displays multiferroic characteristics, exhibiting a considerable enhancement in the saturation magnetisation strength and polarization strength. At room temperature, SrZrO3 exhibits a saturated magnetisation of 0.1280 emu g−1, accompanied by a polarization of 0.27 μC cm−2. Therefore, this work demonstrates that plastically deformed SrTiO3 induced by SC CO2 can successfully transition into a quantum multiferroic material. These results establish a new method toward plastic deformation for the manipulation of the electronic properties of quantum materials.
研究领域:
材料科学
·
凝聚态物理
·
量子物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2021
·
IF 4.577
Haoxiang Zhang,Guangmeng Li,Jingbo Yang,Ai-zheng Chen,Maobin Xie
Poor solubility limits anticancer efficiency of Artemisinin (ART). Here, two types of micronized ART products were produced in one system, using supercritical CO 2 . ART microfibers (0.590 µm ± 0.160 µm) were obtained at a pressure of 25 MPa, temperature of 55 °C, and concentration of 4 mg/mL. ART microparticles (0.890 µm ± 0.610 µm) were obtained at a pressure of 20 MPa, temperature of 55 °C, and decompression time of 60 min. Importantly, the viabilities of U87 cells were 39.8% ± 2.33% and 35.3% ± 11.8%, respectively; while the viabilities of 4T1 cells were 46.2% ± 4.41% and 30.2% ± 3.74%, respectively, when treated with ART microfibers and microparticles, which could be explained by cell cycle arrest in the S phase associated with apoptotic cell induction. In conclusion, supercritical-derived ART microproducts showed improved anticancer effects.
研究领域:
药理学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lin Li,Kunpeng Yu,Jing Xie,Haixin Sun,Tong Feng,Qinqin Xu,Jianzhong Yin
Graphene has emerged as a highly promising material in the field of membrane separation due to its exceptional properties. However, the challenge of scalable production remains a significant barrier to its widespread application. In this study, we directly used graphene nanosheets (GNs) stripped by supercritical fluid as raw materials to prepare composite membranes with excellent performance. By systematically controlling the intercalation and phase-transition expansion of supercritical CO 2 under the guidance of the established exfoliation theory, a graphene dispersion with a concentration of 2.71 mg∙mL −1 was obtained, which is the highest value reported to date using the supercritical exfoliation (SCE) method. 90 % of the exfoliated GNs are <3 layers, 51 % of GNs exhibiting lateral dimensions >3 μm. The fabricated graphene composite membrane exhibited excellent dye rejection performance, achieving a rejection rate of 99.95 % for Congo red. This method addresses the limitations of conventional liquid-phase exfoliation methods, offering a scalable, cost-effective, and eco-friendly route for the production of graphene and related composite membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Yongqi Sun,Fujun Sheng,Guangyu Sun,Jiaxuan Wang,Lei Shi
Supercritical CO2 (scCO2) extraction exerts a significant effect on the physicochemical characteristics of crude oil. This work focuses on the role that waxes and asphaltenes played in the scCO2 extraction effect. The extraction rate, hydrocarbon composition, wax precipitation characteristics, conductivity, and centrifugal stability are quantitatively characterized. It is found that the extraction rate of model oil without paraffin wax is the highest after scCO2 treatment, approximately 18.3%. When the paraffin wax content is enlarged from 5.0 to 15.0 wt %, the extraction rate decreases from 16.7% to 11.7%. It is indicated that the presence of wax inhibits the extraction effect of scCO2. In addition, with further addition of asphaltenes, the extraction rate increases and then decreases. This manifests that the addition of asphaltene promotes the extraction effect of scCO2, while the combined effect of waxes and asphaltenes inhibits the extraction effect with the further increase of the asphaltene concentration. Considering the wax precipitation characteristics, the wax appearance temperature (WAT) and wax precipitation amount (WPA) are both increased after scCO2 treatment. With the addition of asphaltene, the WAT and WPA of model oil are both decreased. As for wax crystal morphology, the wax crystals in paraffin wax oil become finer after the treatment, and the amount of wax crystals precipitated increases. Lastly, after scCO2 treatment, the conductivity and absorbance of model oil containing asphaltene decrease, while the light transmittance increases, due to the formation of asphaltene aggregates under scCO2.
研究领域:
石油化学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Qing Guo,Ze Li,Xuanxiang Zeng,Dan Li,Huiming An,Li Zhao,Liang Tao,Qiang Li
Reduction of the reservoir permeability during supercritical CO2 fracturing caused significant reservoir damage, which directly affects the crude oil recovery rate. This investigation explored a novel thickener for supercritical CO2 fracturing fluid, this CO2 thickener not only effectively improves the viscosity and rheological properties of CO2 fracturing fluid but also contributes to reduce reservoir damage and improve permeability. The research results indicated that the synthesized CO2 thickener (3 wt %) can increase the apparent viscosity of supercritical CO2 fracturing fluid to 7 mPa·s, and a 9% matrix permeability damage rate and a 0.5 mD permeability decrease value are shown in a 3% CO2 fracturing fluid. However, 3 wt % of commercial CO2 thickener only increases the apparent viscosity of supercritical CO2 fracturing fluid to 3 mPa·s, while the reservoir damage rate increases to 13%. Two thickeners exhibit completely different damage capabilities to the reservoir, and the synthesized CO2 thickener shows excellent characteristics of reducing reservoir permeability and is also conducive to protecting shale reservoirs. Furthermore, supercritical CO2 fracturing fluid containing synthetic thickeners has better temperature and shear resistance compared with commercial thickeners. This may be because the synthesized thickener and the micro grid formed by supercritical CO2 reduce the adsorption in shale crevices, but a large amount of commercial thickeners can adsorb on the surface of shale.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2014
·
IF 2.571
Qin-Qin Xu,Yu-Ling Ma,Gang-Xu,Jian-Zhong Yin,Ai-Qin Wang,Jin-Ji Gao
Well-defined Ag nanowires were obtained in SBA-15 at a short deposition time of 5 min in supercritical CO 2 when adding a small amount of ethylene glycol as the co-solvent. Ethylene glycol played a key role in dictating the nanowire morphology. Through detailed investigation of the whole deposition process, including the dissolution of precursor assisted by the co-solvent, the diffusion properties of the precursor into the nano-scale channels of the substrate, and the interaction between the precursor and the substrate, we found that a small amount of precursors were reduced into Ag 0 by ethylene glycol at the initial stage of the deposition. The resultant Ag 0 then acted as nuclei leading to a non-equilibrium sorption of the precursor. The rapid adsorption of the precursor onto the substrate resulted in a high loading of Ag in a short deposition time and the formation of nanowire morphology. Furthermore, this method was successfully extended to other porous substrates such as γ-Al 2 O 3 , SiO 2 and KIT-6, demonstrating its great potentials in the synthesis of nanocomposites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Bo Zhang,Chunming Xu,Quan Shi,Yiqiang Li,Zheyu Liu,Jianxun Wu
Supercritical CO2 flooding is an efficient method of enhanced oil recovery in which CO2 injection can selectively extract light components and cause the deposition of residue heavy components in reservoir pores. Residues can change the wettability of the rock surface to ultimately reduce crude oil production. In this study, supercritical CO2 extraction experiments were conducted under identical operation conditions using various minerals, including quartz, montmorillonite, Illite, dolomite, albite, calcite, and chlorite. The crude oil, extracts, and residues were comprehensively characterized using high-temperature gas chromatography and high-resolution mass spectrometry. The results indicate that the extraction effect is influenced by the specific surface areas and adsorption strengths of various minerals. The larger the specific surface area, the more readily the heteroatoms in the resins can be adsorbed onto the rock surface. Quartz exhibits weak adsorption strength toward heteroatoms, whereas minerals with high specific surface areas demonstrate significantly higher adsorption strengths compared to those with lower specific surface areas. The wettability changes of various mineral surfaces were also assessed through contact angle measurements. Upon exposure to crude oil, a rock surface undergoes a transition from being water-wet to becoming oil-wet. Subsequently, it reverts back to being more water-wet due to supercritical CO2 extraction which further proves the feasibility of alleviating channeling by injecting water. Furthermore, the alteration in wettability caused by the change in the carbon number of different heteroatoms under supercritical CO2 extraction is also investigated. This study provides a basis for the mechanism study of CO2–crude oil–rock interaction and a comprehensive understanding of the wettability alteration of different reservoirs in carbon dioxide flooding.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 18
·期 11
·3370-3377
·
IF 8.506
Wenjing Yang,Haiyang Cheng,Bin Zhang,Yan Li,Tong Liu,Mingli Lan,Yancun Yu,Chao Zhang,Weiwei Lin,Shin-ichiro Fujita,Masahiko Arai,Fengyu Zhao
The hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) was studied with a homogeneous RuCl2(PPh3)3 catalyst in supercritical CO2 (scCO2). The conversion of LA was observed to increase with CO2 pressure and the possible reasons for this rate acceleration were discussed, including the molecular interactions of CO2 with the reacting and catalytic species as well as the acidity and phase behavior of the reaction mixture. The interaction between CO2 and RuCl2(PPh3)3 was significant, which resulted in the production of an active RuHCl(CO)(PPh3)3 complex and thus enhanced the rate of hydrogenation in the presence of CO2.
研究领域:
化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 23
·52287
·
IF 3.057
Jinjing Wang,Yi Zhang,Jianfei Sun,Zhen Jiao
Multi-modal porous scaffolds can promote bone regeneration. In the present study, they were successfully fabricated from poly (lactic-co-glycolic acid) (PLGA)/superparamagnetic iron oxide nanoparticles (SPIONs) by supercritical CO 2 foaming, where SPIONs was employed as heterogeneous nucleation agent. The effects of SPION size on pore nucleation in PLGA/SPIONs nanocomposites were investigated. It was found that the addition of smaller SPIONs size caused the reduction of pore size. Multi-modal porous scaffolds could be available by controlling the SPIONs content, soaking temperature, pressure, and depressurization rate. The porosity of the PLGA/SPIONs scaffolds ranged from (58.68 ± 0.62)% to (94.97 ± 0.14)% could be obtained via adjusting the supercritical CO 2 foaming conditions. Moreover, it was found that the compressive modulus and porosity of the scaffolds were strongly associated with the porous structure. This study provided a new green preparation method for magnetic scaffolds to realize the controllable adjustment of the multi-mode porous scaffolds.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2022
·
IF 1.695
Kaixiang Cui,Yufei Xia,Linlin Tian,Shuai Wang,Yongyao He
In order to enhance oil recovery, supercritical CO2 (scCO2) flooding has been applied in many oilfields to extract oil and gas post primary recovery. However, it causes serious scaling problems in the reservoir, oil well and production tubing. In this article, the produced water quality before and after scCO2 flooding in carbonate reservoirs are analyzed. The scaling trend of produced water before and after scCO2 flooding was calculated by using the Davis-stiff saturation index and Ryznar stability index methods. Static experiments and scanning electron microscope (SEM) are used to study the scale inhibition performance and mechanism of HEDP, ATMP, MA-AA, and PAA on CaCO3 in produced water before and after scCO2 flooding. The results show that after scCO2 flooding, the quality of produced water changes obviously, thus the scaling trend of produced water increases, the growth of CaCO3 crystal is affected and the scale inhibition efficiency of conventional scale inhibitors decreases.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）