mLife
·
2025
·
IF 4.5
Huahui Chen,Fengfeng Zheng,Xi Feng,Zijing Huang,Wei Yang,Chuanlun Zhang,Wenbin Du,Kira S. Makarova,Eugene V. Koonin,Zhirui Zeng
Eukaryotes are hypothesized to be archaeal–bacterial chimeras. Given the different chemical structures of membrane phospholipids in archaea and bacteria, transformations of membranes during eukaryogenesis that led to the bacterial-type membranes of eukaryotic cells remain a major conundrum. One of the possible intermediates of eukaryogenesis could involve an archaeal–bacterial hybrid membrane. So far, organisms with hybrid membranes have not been discovered, and experimentation on such membranes has been limited. To generate mixed membranes, we reconstructed the archaeal membrane lipid biosynthesis pathway in Escherichia coli , creating three strains that individually produced archaeal lipids ranging from simple, such as DGGGOH (digeranylgeranylglycerol) and archaeol, to complex, such as GDGT (glycerol dialkyl glycerol tetraether). The physiological responses became more pronounced as the hybrid membrane incorporated more complex archaeal membrane lipids. In particular, biosynthesis of GDGT induced a pronounced SOS response, accompanied by cellular filamentation, explosive cell lysis, and ATP accumulation. Thus, bacteria seem to be able to incorporate simple archaeal membrane lipids, such as DGGGOH and archaeol, without major fitness costs, compatible with the involvement of hybrid membranes at the early stages of cell evolution and in eukaryogenesis. By contrast, the acquisition of more complex, structurally diverse membrane lipids, such as GDGT, appears to be strongly deleterious to bacteria, suggesting that this type of lipid is an archaeal innovation. Impact statement The formation of archaeal–bacterial hybrid membranes represents possible intermediates in early life evolution and eukaryogenesis. In this study, we synthesized archaeal membrane-spanning lipid GDGT (glycerol dialkyl glycerol tetraether) in bacteria Escherichia coli to create such hybrid membranes and examined their physiological properties. Our results suggest that the formation of hybrid membranes containing simple archaeal-type lipids could be a plausible intermediate stage at major evolutionary transitions, whereas more complex, membrane-spanning lipid GDGT would have been deleterious and probably represent a later archaeal innovation, possibly an adaption to thermal habitats. These findings provide new insights and perspectives into the evolution of membranes at the earliest stages of cellular evolution as well as at eukaryogenesis.
研究领域:
微生物学
·
分子生物学
·
进化生物学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Xi Zhang,Xiaodong Wang,Wei Huang
In industry, ethylene (C 2 H 4 )/propylene (C 3 H 6 ) separations are usually performed by a cryogenic process, which is energy intensive. Membrane separation technology is an alternative separation process that saves energy and is efficient. In this study, blend membranes were prepared by doping polyethylene glycol (PEG600) into a poly(ether-block-amide) (Pebax® 2533) matrix and were used to separate the C 2 H 4 /C 3 H 6 mixture. The PEG 600 and Pebax® 2533 polymers have good compatibility because they share hydrogen bonds. The addition of PEG600 is conducive to the hydrophilicity and the free volume of blend membranes, and it is also conducive to the solubility of C 2 H 4 and C 3 H 6 in the membranes, which improves the ability of the membranes to separate this gas pair. The Pebax® 2533/PEG600 blend membrane with 15% (mass) PEG600 showed the highest separation performance in our investigated membranes, with a C 3 H 6 /C 2 H 4 selectivity of 8.9 and a C 3 H 6 permeability of 196 barrer (1 barrer = 1.33 × 10 14 m 3 (STP)·m·m −2 ·s −1 ·kPa −1 ) at 238 K and 0.2 MPa, which is higher than that of the Pebax® 2533/NaY-6% (mass) membrane ( α C 3 H 6 /C 2 H 4 =6.5, P C 3 H 6 =211 barrer) reported in our previous work. It is confirmed that incorporating PEG600 into the Pebax® 2533 matrix to fabricate blend membranes is an efficient strategy for separating light olefins .
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Wenli Wu,Lei Feng,Wei Tan,Liqin Han,Qunfeng Yue,Feng Zhang,Xiaoqiang Liang
The rich activated protons and effective proton-conducting paths are of importance to improve conductivities of conductors. Herein, a series of Brönsted acids as proton carrier and proton transfer sites is introduced into the highly stable MOF , contributing to create plentiful hydrogen bonds within frameworks. Consequently, the trifluoromethanesulfonic acid-embedded JUC-1000 ([Cu 24 (BDPO) 12 (H 2 O) 12 ]) displays the relatively highest conductivity of 7.04 × 10 −4 S cm −1 under ∼98% RH and 328 K, ∼16 times that of JUC-1000 (4.47 × 10 −5 S cm −1 ). When TMSA@JUC-1000 (TMSA = CF 3 SO 3 H) blended with chitosan (CS), the proton conductivity of TMSA@JUC-1000/CS-15 is the highest at ∼76% RH and 328 K (1.01×10 −2 S cm −1 ), which is six times higher than that of JUC-1000/CS (1.85×10 −3 S cm −1 ). The CS contains abundant –NH 2 and –OH groups as proton jumping sites, which would activate the –NH– or –OH bonds of JUC-1000 and the acidic groups in Brönsted acids . These would result in an increased content of activated protons and effective formation of H-bonding nets by acid-base interactions. The findings provide valuable insights into the potential application of MOFs materials in energy devices.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yi Ren,Die He,Tong Wang,Hong Qi
Organosilica membranes with good hydrothermal stability are promising for pre-combustion capture, but the trade-off effect still constrains their gas separation performance. Herein, we prepared hybrid membranes by incorporating ZIF-7 nanoparticles into 1, 2-bis(triethoxysilyl)ethane (BTESE) networks to improve the H 2 /CO 2 permselectivity by the intrinsic properties of nanoparticles. The effect of inorganic fillers was investigated by adjusting the doping content of ZIF-7 nanoparticles. We found that the H 2 permeance of hybrid membranes remained at ∼10 −6 mol·m −2 ·s −1 ·Pa −1 , while the H 2 /CO 2 permselectivity decreased with increasing nanoparticle doping content. The E-ZIF-7-0.4 hybrid membrane showed H 2 permeance of 1.2 × 10 −6 mol·m −2 ·s −1 ·Pa −1 and H 2 /CO 2 permselectivity of 21.7. Our results may offer valuable insights into preparing hybrid membranes with optimal nanoparticle doping content.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Lei Hou,Zhe Wang,Zhaoyu Chen,Wenbo Chen,Cancan Yang
PIM-1 and poly(arylene fluorene ether ketone) (Am-PAFEK) were synthesized by polycondensation . Their structures were characterized by 1 H NMR and FT-IR spectral analyses. A series of flexible and transparent blend membranes were prepared by solution blending with different ratios of PIM-1 and Am-PAFEK. DSC and SEM analyses showed good compatibility between them. PIM-1 and Am-PAFEK in the blend membrane perform their respective functions. The former provides excellent permeability; the latter provides high selectivity for CO 2 . Addition of 20% Am-PAFEK into the blend membrane increased the gas separation selectivity of CO 2 /CH 4 and CO 2 /N 2 by 75% and 65%, respectively. The optimum separation performance was achieved with blend membrane with a CO 2 permeability of 752.4 Barrer and a CO 2 /N 2 selectivity ratio of 26.7, extremely close to the Robeson upper bound (2008). After 140-days aging test, the blend membranes still maintained above 70% CO 2 permeability, indicating that it has good antiaging properties. Consequently, the new type of membranes have great potential in industrial applications.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Tingting Zhang,Guangli Yu,Xiaoqiang Liang,Nian Zhao,Feng Zhang,Fengyu Qu
Imidazolium based ionic liquids (denoted BMIM-ILs) with the altering anions (OH − , HCO 3 − and AcO − ) as ionic carriers were synthesized and bottle around ship introduced into the cages of zeolite-type metal organic frameworks (ZIF-8) as porous host, resulting in a series of anion-containing composites (BMIM-ILs/ZIF-8) with anion conducting. Bottle around ship method could integrate with the superiorities of BMIM-ILs and ZIF-8 for more excelling conduction and quite eliminate IL leakage. Besides, the hybrid membranes combined BMIM-ILs/ZIF-8 as fillers with polymer blends consisting of polyvinylidene fluoride (PVDF) and polyvinylpyrrolidone (PVP) as matrix were assembled with varying weight percentages. The structures of the prepared composites and hybrid membranes were inspected. It should be noted that ZIF-8 encapsulating into BMIM-OH (6.8 × 10 −4 S cm −1 ) and BMIM-HCO 3 (1.08 × 10 −3 S cm −1 ) reveal two orders of magnitude increase in conductivity-values comparison to that of the parent framework (2.3× 10 −5 S cm −1 ) at 353 K and ∼98% relative humidity (RH). The hybrid membrane containing 30%BMIM-OH/ZIF-8 has the advantage in proton conductivity of 1.02 × 10 −3 S cm −1 at 353 K and ∼98% RH, which is 6.49 times higher than that of the ZIF-8/PVP/PVDF. The activation energies (E a ) of BMIM-OH/ZIF-8 and its hybrid membrane are calculated to be 0.15 eV and 0.23 eV, respectively. They could be regarded as a fast-ion conductor on the ground of high conduction and low activation energy, which make them bright outlooks and wonderful potential for electrochemical devices .
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 32
·7737-7747
·
IF 5.317
Lei Miao,Yuanyuan Tu,Yang Yang,Shudong Lin,Jiwen Hu,Min Zhang,Yue Li,Fei Li,Yangmiao Mo
Graphical Doubly responsive : A thermo- and pH-sensitive binary graft copolymer bearing anchoring side chains was synthesized and blended with commercial polysulfone to prepare thermo- and pH-responsive blended membranes, which exhibited robust, reversible, independent temperature- and pH-responsive water wettability and water permeability (see figure). A stimuli-responsive membrane exhibiting independent pH- and temperature-responsive behavior was fabricated from a blend of commercial polysulfone with a functional amphiphilic binary graft copolymer, namely, polysulfone- graft -(poly(isopropylacrylamide- co -acrylic acid)- random -poly(methyl acrylate)), denoted PSf- g -(P(NIPAAm- co -AA)- r -PMMA). Two graft copolymers with different lengths of P(NIPAAm- co -AA) side chains were designed and enriched on the membrane surface to serve as thermo- and pH-responsive on/off switches. The differences between the dual-responsive behaviors of the two kinds of polymer-blend membranes were studied by water-flux and contact-angle measurements. The PMMA side chains served to securely anchor the graft copolymers to the membrane substrate, and the blended membrane prepared from binary graft copolymer was more stable and exhibited more robust stimuli-responsive behavior than that prepared from mono-graft copolymer PSf- g -P(NIPAAm- co -AA).
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Bingbing Yang,Lu Bai,Zhenlei Wang,Haiyan Jiang,Shaojuan Zeng,Xiaochun Zhang,Xiangping Zhang
Ammonia (NH3) separation and recovery from NH3-containing gases favor resource utilization and ecological protection. Ionic liquids (ILs) are promising alternatives to fabricate polymer-based hybrid membranes with excellent and tunable properties. Herein, [Eim][NTf2] and [Emim][NTf2], with different hydrogen bond donating abilities and viscosities, were used to tailor NH3 transport properties in the membranes for enhancing NH3 separation performance. Poly(ether-block-amide) (Pebax)/[Eim][NTf2] membranes exhibit superior NH3 permeability of 2118.7 Barrer with NH3/N2 and NH3/H2 selectivities of 467.0 and 127.2, respectively. NH3 solubility in Pebax/[Eim][NTf2] membranes increases significantly when increasing the IL content, while the solubility in Pebax/[Emim][NTf2] membranes is almost unchanged, mainly because the hydrogen bond interaction between NH3 and [Eim][NTf2] is stronger. NH3 diffusion in Pebax/[Eim][NTf2] membranes decreases when increasing the IL content, while the diffusion in Pebax/[Emim][NTf2] membranes exhibits the reverse trend, corresponding to NH3 diffusion properties in pure ILs. Therefore, NH3 solubility is the more dominant factor in improving NH3 permeability in the membranes.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2014
·
IF 2.613
Shengnan Yu,Fusheng Pan,Sen Yang,He Ding,Zhongyi Jiang,Baoyi Wang,Zhuoxin Li,Xingzhong Cao
Hybrid membranes were fabricated with active layers composed of polydimethyl siloxane (PDMS) and metal organic framework MIL-101 (Cr), together with support layers composed of polyvinylidene fluoride (PVDF). Transmission electron microscopy (TEM), X-ray diffraction (XRD) and nitrogen adsorption were used to study the structure of MIL-101 (Cr) particles; scanning electron microscopy (SEM), infrared spectrum (IR), thermogravimetric analysis (TGA), thermomechanical analysis and positron anihilation lifetime spectroscopy (PALS) were employed to characterize the structural morphology, free volume property, thermal and mechanical features of the membranes. The effect of MIL-101 (Cr) incorporation on swelling and pervaporation performance of the hybrid membranes were evaluated with thiophene and n -octane mixture as model gasoline. The packing of PDMS chains was interrupted by MIL-101 (Cr), thus the fractional free volume was increased. Accordingly, the separation performance including permeation flux and selectivity was increased remarkably. The optimal performance was achieved when the weight fraction of MIL-101 to PDMS was 6% with a flux of 5.2 kg·m −2 h −1 (increased by 136% compared with the PDMS control membrane) and an enrichment factor of 5.6 (increased by 38% compared with the PDMS control membrane).
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2019
·Vol. 14
·期 4
·661-672
·
IF 2.809
Zhang Ye,Song Jian,Mayta Josue Quispe,Pan Fusheng,Gao Xue,Li Mei,Song Yimeng,Wang Meidi,Cao Xingzhong,Jiang Zhongyi
The utilization of materials with a hierarchical porous structure as multi-functional additives is highly attractive in the preparation of hybrid membranes. In this study, novel hybrid membranes are designed by embedding hierarchical porous Santa Barbara Amorphous 15 (SBA-15) with a dual-pore architecture (micropores and mesopores) for pervaporation desulfurization. The SBA-15 with cylindrical mesopores provides molecular transport expressways to ensure improved permeability, while micropores on the wall have molecular sieving effects that are essential for the enhancement of permselectivity of thiophene molecules. Considering thiophene/ n -octane mixture as a model system, the hybrid membrane with embedded 6 wt-% SBA-15 exhibits optimal pervaporation desulfurization performance with a permeation flux of 22.07 kg·m −2 ·h −1 and an enrichment factor of 6.76. Moreover, the detailed structure and properties of hybrid membranes are systematically characterized. This study demonstrates the immense potential of hierarchical porous materials as additives in membranes to simultaneously increase permeability and permselectivity.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yutong Wang,Jiashuai Zhao,Ziting Zhu,Yuhan Wang,Junyi Zhao,Tianpei Yi,Zhibin Ma,Fusheng Pan,Zhongyi Jiang
Adding charged fillers to incorporate long-range electrostatic interactions is an effective way to reduce structure defects and improve separation performance of polyelectrolyte membranes. In this study, three cationic covalent organic frameworks (COFs), TpEB, TpTG Cl , and TpPy, were incorporated into anionic alginate to prepare hybrid membranes for pervaporation dehydration of ethanol. With the increase of electrostatic interaction, the decrease in the mobility of polymer chains leads to an increase in the crystallinity and selectivity. Meanwhile, the inherent hydrophilic channels of iCOFs provided additional mass transfer channels, increasing the membrane permeability. When separating a 90 wt% ethanol/water mixture at 76 °C, the hybrid membrane containing 15 wt% TpEB exhibited the highest separation performance with a permeation flux of 2460 g m -2 h -1 and a separation factor of 2110, and it also demonstrated ideal long-term stability. This work provides a new perspective for the selection of fillers in the design process of hybrid membranes in the future.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Ziqi Deng,Jian Gao,Yue Wang,Pengyang Deng,Yifan Zhang,Lianhua Zhao,YuShu Huang
In this paper, ZIF-67/PP hybrid membrane (ZIF-67-N) is prepared by in situ synthesizing ZIF-67 on polymer membranes for rapid extraction of U (VI) from water. The effects of pH, contact time, and concentration of U (VI) on the adsorption of ZIF-67-N are investigated. The adsorption isotherm and kinetics analysis show an extremely high adsorption capacity of 1334.8 mg/g of ZIF-67-N which is 5.36 times higher than that of ZIF-67, and a rapid adsorption equlibrium of 20 min that is 12 times faster than ZIF-67. The adsorption process is consistent with the Freundlich isotherm equation and pseudo-second-order rate equation . ZIF-67-N also exhibits good selectivity for U (VI) in simulated seawater . The high adsorption performance of ZIF-67-N is attributed to the membrane structure that improves the utilization of coordination sites including Co-OH, C-N, and C N. To our knowledge, ZIF-67-N achieves the highest adsorption capacity among reported MOFs materials. This work provides a kind of efficient adsorption materials for rapid U (VI) extraction, which will be conducive to promoting the development of U (VI) extraction technology.
研究领域:
材料科学
·
环境科学
✓ 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）