CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2020
·
IF 1.687
Ibrahim A. Alhumaydhi,Rashid Abro,Shaukat Ali Mazari,Masroor Abro,Sabzoi Nizamuddin,Abdul Q. Memon,Guangren Yu
This work presented the preparation of two new systems comprised of ionic liquids (ILs), organic solvent, and cuprous salt. Consequently, their absorption ability was investigated for propylene (C 3 H 6 ) and propane (C 3 H 8 ) and their mixtures at 100 kPa-700 kPa pressure and 298 K-318 K temperature. Representative ILs were 1-butyl-3-methylimidazolium thiocyanate ([C 4 mim]SCN) and 1-ethyl-3-methylimidazolium thiocyanate ([C 2 mim]SCN). N,N-dimethylformamide (DMF) and cuprous thiocyanate (CuSCN) were selected for the absorption system. The effects of operating parameters like Cu + concentration, pressure, temperature, and recycling of ILs absorbency were examined and compared with the literature. It was observed that C 3 H 6 shows a chemical absorption while C 3 H 8 undergoes a physical one by [C 4 mim]SCN-DMF-CuSCN and [C 2 mim]SCN-DMF-CuSCN, and an increase in concentration of Cu + effectively improves the absorption capability for C 3 H 6 and the selectivity of C 3 H 6 /C 3 H 8 . Furthermore, [C 4 mim]SCN-DMF-CuSCN had higher absorption capability and selectivity for C 3 H 6 than [C 2 mim]SCN-DMF-CuSCN. [C 4 mim]SCN-CuSCN-2.0 M absorbed 0.637 mol of C 3 H 6 per litre while 0.16 mol of C 3 H 8 per litre at 700 kPa and 298 K, with a selectivity of 3.9. This work shows that new combination of organic solvent and ILs with Cu + salt is a new class of potential reactive absorbents to separate C 3 H 6 and C 3 H 8 .
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Zhipeng Deng,Kun Lv,Gang Zhu,Xuezhi Zhao,Yujun Feng
Efficient separation of oil–water mixtures, particularly homogeneous and stable emulsions, has always been an industrial challenge. Herein, we report a facile, cost-effective procedure for fabricating superhydrophobic melamine sponges using a single solution–immersion process. The modified sponge has stable superhydrophobicity owing to the synergy of triple hydrophobic mechanisms with a maximum water contact angle of 158°. As an absorbent, the modified sponge block exhibits high porosity, outstanding absorption capacity, excellent mechanical properties, and superior physical and chemical stability, enabling its use for the separation of stratified oil–water mixtures via repeated absorption–extrusion processes with a separation efficiency of nearly 100%. Furthermore, as a filter, the crushed, modified sponge powders exhibit a demulsification efficiency ranging from 97.65 to 99.33% for the separation of ideal water-in-oil emulsions under gravity. Finally, the feasibility of these sponges for oilfield applications is established through the demonstration of the continuous separation of an emulsion of brine in crude oil using the modified sponge powders in conjunction with an in-house built apparatus. This work may open a viable pathway for the efficient separation of both stratified and emulsified oil–water mixtures via wettability, and provide a novel strategy for the reuse of waste sponges.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 4
·1901671
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IF 4.948
Miao Yu,Peng Xu,Jin Yang,Lai Ji,Changsheng Li
For dealing with crude oil spills, the high viscosity of crude oil greatly limits the absorption capacity of the absorbent materials, making crude oil a major obstacle in the cleaning process. Herein, a MoS 2 -rubber sponge (MoS 2 -RS), as a photothermal sorbent, is prepared by a one-step in situ synthesis. The sponge exhibits excellent superhydrophobicity (the water contact angle is 151°), a high absorption capacity for oils and organic liquids (15–67 g g −1 ), and an outstanding compressive elasticity of 38.6 kPa. Furthermore, MoS 2 -RS shows a good photothermal conversion capability. Under illumination, the viscosity of crude oil could be effectively reduced due to the rapid temperature rise in MoS 2 -RS. This response allows the modified sponge to quickly absorb crude oil, which significantly reduces the adsorption time of 20 µL crude oil from 16 h to 19 s when compared to that of absorbent materials without a photothermal conversion capability. Because of the excellent mechanical performance, MoS 2 -RS could be installed in a vacuum pump to continuously collect crude oil from the water surface. This setup greatly improves the crude oil collecting efficiency. The new photothermal absorbent material shows great potential for the collection of crude oil and the cleanup of spill accidents.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2013
·Vol. 4
·期 23
·5701-5710
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IF 5.231
Kui Feng,Xiaoyan Shen,Ying Li,Yujiang He,Dong Huang,Qiang Peng
Two novel supramolecular polymers (PHBTRU and PFBTRU) containing ruthenium(II) metal ions and bis-terpyridyl ligands with cyclopentadithiophene–benzothiazole conjugated bridges, have been successfully synthesized for application in polymer solar cells by the supramolecular self-assembly process. Both polymers exhibit appropriate solubility in organic solvents and excellent thermal stability with decomposition temperatures over 400 °C. The UV-vis and cyclic voltammetry results show that the resulting polymers have good light-harvesting abilities, low bandgaps as well as low-lying HOMO levels. Compared to polymer PHBTRU, the fluorine atom effect significantly improves the above optical and electrochemical properties of PFBTRU. The photovoltaic devices based on PHBTRU and PFBTRU were fabricated and evaluated with a conventional structure of ITO/PEDOT:PSS/polymer:PC71BM/Ca/Al. The PFBTRU device exhibited the highest power conversion efficiency (PCE) of 2.66% with a Voc of 0.73 V, a Jsc of 7.12 mA cm−2 and a FF of 0.51, which was obtained without any additives and/or posttreatment of the active films. The photovoltaic performance achieved in this work is the best result of the reported supramolecular polymers being used in conventional BHJ polymer solar cells.
研究领域:
材料科学
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能源科学
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有机电子学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Ashuang Liu,Shengyong Cui,Lei Song,Xiangshu Guo,Zhimao Huang,Shancan Wang,Kai Cheng,Ying Xiao,Youfen Fan,Rong Wang
Hemostatic powders are widely used for managing bleeding from wounds with various irregular shapes. However, their limited liquid absorption capacity and difficulty in removal after application remain significant clinical challenges. Herein, we introduce a multifunctional hemostatic powder composed of dually crosslinked poly([2-(methacryloyloxy)ethyl]trimethylammonium chloride- co -acrylic acid) (pMATC- co -AA) and N -[(2-hydroxy-3-trimethylammonium)propyl] chitosan chloride (HTCC), which are integrated via electrostatic interactions and hydrogen bonding. This hemostatic powder exhibits superb liquid-absorbing capacity (94.5 times its own weight in water and 9.1 times in blood), sufficient adhesive properties (5.9 kPa on pig skin), and on-demand removability. It significantly reduces the number of viable Escherichia coli and Staphylococcus aureus by 4.61 and 4.04 orders of magnitude, respectively, thus providing an effective microbiological barrier for the wound. Furthermore, a series of in vivo and in vitro experiments confirm the powder's excellent hemostatic properties. The hydrogel formed on the wound after hemostasis can be removed by saline rinsing on demand, due to its superb liquid-absorbing capacity. Notably, the powder demonstrates good in vivo biocompatibility, with minimal risk of impeding wound healing, and it facilitates the healing process during the later stages. In sum, the hemostatic powder offers a promising solution for trauma bleeding control and acute wound treatment.
研究领域:
生物医学工程
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材料科学
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创伤治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Minjie Gao,Yucui Hou,Qi Zhang,Ying Sun,Shuhang Ren,Weize Wu
In this work, we designed three kinds of functional deep eutectic solvents (DESs) to capture SO2 in simulated flue gas. The DESs were composed of imidazole (Im), 2-methylimidazole, and 2-ethylimidazole as the hydrogen-bond acceptor (HBA) and H2O as the hydrogen-bond donor (HBD). The absorption results showed that the mole absorption capacities of 2.1 vol % SO2 by the three DESs at 40 °C were all about 1 mol of SO2/mol of HBA. Im–H2O DES (nHBA/nHBD = 1:4) shows a mass absorption capacity of 0.331 g of SO2/g of DES, which is the highest value reported in the literature. The mole ratio of HBD/HBA, flow rate of flue gas, and other acid gases in flue gas did not influence the absorption capacity of SO2. The absorption capacity decreased when the temperature increased. The absorption capacity of SO2 was almost the same after absorbing and desorbing 5 times. Furthermore, the results of 1H nuclear magnetic resonance and Fourier transform infrared analyses showed that SO2 was interacted with Im by forming Im sulfite.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Foods
·
2022
·Vol. 11
·期 11
·1642
·
IF 5.561
Hui Li,Bingxiao Liu,Kezia Bess,Zhengxuan Wang,Mingcai Liang,Yan Zhang,Qiong Wu,Lin Yang
This study examined the effects of low-temperature storage on the microstructural, absorptive, and digestive properties of cooked rice. Cooked rice was refrigerated and stored at 4 °C for 0.5, 1, 3, 5, and 7 days, as well as frozen and preserved at −20, −40, and −80 °C for 0.5, 1, 3, 5, 7, 14, 21, and 28 days. The results indicated that the stored rice samples generally exhibited a higher absorption capacity for oil, cholesterol, and glucose than the freshly cooked rice. In addition, after storage, the digestibility of the cooked rice declined, namely, the rapidly digestible starch (RDS) content and estimated glycemic index (eGI) decreased, whereas the slowly digestible starch (SDS) and resistant starch (RS) content increased. Moreover, the increment of the storage temperatures or the extension of storage periods led to a lower amylolysis efficiency. Scanning electron microscopy (SEM) analysis indicated that storage temperature and duration could effectively modify the micromorphology of the stored rice samples and their digestion. Moreover, microstructural differences after storage and during simulated intestinal digestion could be correlated to the variations in the absorption capacity and digestibility. The findings from this study will be useful in providing alternative storage procedures to prepare rice products with improved nutritional qualities and functional properties.Keywords:cooked rice;low-temperature storage;microstructure;absorption capacity;digestibility
研究领域:
食品科学
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营养学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2022
·Vol. 10
·期 13
·7300-7313
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IF 14.511
Zhao Sun,Junpeng Liu,Rongjun Zhang,Yu Wu,Hongwei Li,Sam Toan,Zhiqiang Sun
Sorption-enhanced steam reforming of methanol (SE-SRM) is a promising approach to creating a high-purity hydrogen supply. However, catalysts suffer from activity deactivation and low CO2 uptake capacity. In this study, we investigate the role of Ga doping of Cu–MgO in SE-SRM by synthesizing a series of MgO embedded xGaCuMg catalytic sorbents via a sol–gel method. The TEM-EDX mapping results indicate that MgO nanoparticles can be successfully embedded in the bulk-phase of the catalytic sorbent with a stabilized microstructure. The results from in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reveal that the Ga-doped catalytic sorbent is conducive to promoting the conversion of C-containing intermediates in SE-SRM, and absorbing CO2 in the form of bidentate carbonate rather than monodentate carbonate. Experimental studies verify that the best uptake capacity of 18GaCuMg catalytic sorbent (36.25 mg CO2/g MgO) achieves almost complete conversion of methanol (99.70%) with 100% H2 selectivity at 200 °C. Specifically, no CO is formed during the kinetic-control stage of SE-SRM. Density functional theory (DFT) calculations based on the Cu(111)Ga2O3(202)MgO(200) model revealed that the Ga doping can enhance the adsorption energies of methanol and carbon dioxide, promoting methanol activation and increasing CO2 uptake capacity. These findings provide valid strategies for functionalized nanomaterial design, which will substantially promote the SE-SRMR performance with desired catalytic sorbent recyclability.
研究领域:
材料科学
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催化化学
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能源工程
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Zhang Yuanchi,Li Cairong,Guo Along,Yang Yipei,Nie Yangyi,Liao Jiaxin,Liu Ben,Zhou Yanmei,Li Long,Chen Zhitong,Zhang Wei,Qin Ling,Lai Yuxiao
Wet-tissue adhesives have long been attractive materials for realizing complicated biomedical functions. However, the hydration film on wet tissues can generate a boundary, forming hydrogen bonds with the adhesives that weaken adhesive strength. Introducing black phosphorus (BP) is believed to enhance the water absorption capacity of tape-type adhesives and effectively eliminate hydration layers between the tissue and adhesive. This study reports a composite patch integrated with BP nanosheets (CPB) for wet-tissue adhesion. The patch’s improved water absorption and mechanical properties ensure its immediate and robust adhesion to wet tissues. Various bioapplications of CPB are demonstrated, such as rapid hemostasis (within ~1-2 seconds), monitoring of physical-activity and prevention of tumour-recurrence, all validated via in vivo studies. Given the good practicability, histocompatibility and biodegradability of CPB, the proposed patches hold significant promise for a wide range of biomedical applications.
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
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2023
·Vol. 30
·期 6
·1937-1951
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IF 2.6
Liang Jiaming,Lin Shaohui,Feng Xianshe,Pan Qinmin
Frequent oil spills and oily wastewater discharge have caused serious damage to the ecological environment, which make it urgent to address these challenges. Herein, we report an effective strategy and low-cost method to transform commercially available melamine foams into superhydrophobic/superoleophilic absorbents, which has a high separation ability for both oil-water mixtures and emulsions. Our approach involves the co-deposition of tannic acid and 3-aminopropyltriethoxysilane on the foam surface to form a hierarchical structure, followed by the covalent grafting of palmitic acid with low surface energy onto the foam backbones via acylation. The resulting foam maintained a cross-linked porous structure with a water contact angle of 153° and a sliding angle of 7°, exhibiting a high degree of water repellency. Absorption experiments with chloroform and engine oil showed that the foam has high absorption capacity, reaching 99.2 and 172.8 times its own weight, respectively, and the foam still retains excellent elasticity after 1000 compression cycles. In addition, the superhydrophobic foam has a high demulsification ability to oil-in-water emulsions by repeated compression and violent stirring, and its separation ability for toluene-in-water emulsions was up to 99.25%. Based on these results, the superhydrophobic foam has significant potential for large-scale oil spill cleanup and wastewater purification.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Qiangbing Shi,Kaixuan Wang,Mengjun Wang,Tao Li,Baozeng Ren,Yinge Bai,Xiangping Zhang
Four sulfate-based ILs, 1-butyl-3-ethylimidazolium ethyl sulfate [Beim][EtSO4], 1-ethyl-3-ethylimidazolium ethyl sulfate [Eeim][EtSO4], 1-ethyl-3-methylimidazolium ethyl sulfate [Emim][EtSO4], and 1-ethylpyridinium ethyl sulfate [Epy][EtSO4], were synthesized and used as an absorbent for dichloromethane (DCM). Among them, the maximum DCM absorption capacity of 0.426 g DCM g–1 IL was achieved in [Beim][EtSO4] at 313.15 K and 37.7% DCM concentration, which was 42.2% higher than that of common organic solvent bis(2-ethylhexyl) adipate under the same conditions. The density and viscosity of [Beim][EtSO4] containing different mass fractions of DCM were measured. The density of [Beim][EtSO4] increases with the mass fraction of adsorbed DCM, while the viscosity decreases sharply. The efficient performance of ILs to absorb DCM is mainly due to the hydrogen bonding interaction between the anion and DCM, which was confirmed by spectroscopic measurement and quantum chemical calculations. This work demonstrates the great potential of ILs in separating and recovering DCM from exhaust gas.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Fengsong Liu,Yan Zhang,Xinglong Xiao,Yifang Cao,Wenjuan Jiao,Hong Bai,Long Yu,Qingfei Duan
Growing global awareness of environmental issues has led to increased research interest in starch-based foams as a biodegradable packaging material. However, limitations such as low foaming ratio and poor water resistance hinder their development and industrial application. This study aimed to address these challenges by investigating the effect of the polyvinyl alcohol (PVA) content and hydrolysis degree on foam properties, providing insight into the intricate interplay between melt viscoelasticity and foam characteristics. The results demonstrated that the foaming behaviors, viscoelastic properties, thermal stabilities and mechanical performances of the foams were significantly improved with increasing hydrolysis degrees of PVA. These enhancements were attributed to hydrogen bonding interactions and intermolecular entanglements between starch and PVA chains. Additionally, the incorporation of PVA resulted in a remarkable reduction in the water absorption capacity (WAC) of the foams. Specifically, the foam containing 20% PVA with a hydrolysis degree of 98% exhibited the lowest WAC of 7.46% at 75% RH, the lowest bulk density of 12.42 kg/m 3 , the highest foaming ratio of 54.66, and the highest porosity of 99.39%. These properties were equivalent to those of commercially available expanded polystyrene (EPS). Furthermore, the addition of 20% PVA yielded the highest compressive strength of 110.58 MPa and the highest recovery of 92.75%, indicating great potential for diverse cushioning applications. Overall, this work highlights the significant potential for wider application of starch-based foams in large-scale industrial settings.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）