CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhe Qiu,Fanjun Yu,Dan Xu,Zengbin Wang,Junya Huang,Shuo Wang,Yanxiao Yang,Yonggui Wang,Jian Li,Zefang Xiao,Yanjun Xie,Kai Zhang
Water-transport based on biomimetic self-propelled directional water transport materials have attracted wide attention but are limited by low transport speed, costly and complicated preparation, and scaling difficulty. By retaining native cellulose microfibril structure within wood cell walls and their controlled shrinkage, we constructed a self-propelling directionally water transporting wood (SDTW) by reshaping the cell wall to generate robust capillary forces due to aligned longitudinal hierarchical wood cell structures. Hierarchical structures containing directional parallel macro- and micro-sized ridge-groove structures and creating nano-voids are fabricated. They are further intactly fixed after reaction with maleic anhydride to improve the dimensional stability and environmental durability without changing the hydrophilicity on surface. Resulting SDTW exhibited an ultrafast water transport speed of 200.4 mm/s (∼260 % of Nepenthes alata showing a fast speed of 78 mm/s as a native structure) and water absorbing rate of 1.15 × 10 5 L/m 2 /h (over 4200-fold higher than that of natural wood). With these ultrafast water transport characters, SDTW was used as water manipulating systems for fast bottom to up transportation of liquid water at a rate of 193.5 mm/s, and as high fog harvesting system with an efficiency of 10.6 g/cm 2 /h. With its facility, durability, scalability, and sustainability, the SDTW demonstrates a new class of sustainable wood-based materials for practical water manipulation applications.
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xiaojuan Wang,Hanjing Xue,Houkang Pu,Huacheng Xu,Yijun Huang,Xinyan Wang,Congjie Gao,Xueli Gao
The cosolvent-assisted interfacial polymerization (CAIP) has garnered significant attention due to its capacity to easily and effectively modify the performance of polyamide (PA) reverse osmosis (RO) membranes. To gain deeper understanding of the mechanism of a specific type of cosolvents on the IP reaction, namely N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMAc), and N,N-dimethylpropionamide (DMPr) were used as aqueous-phase cosolvents to systematically investigate their effects on the membrane structures and properties under different conditions. Amide cosolvents in the aqueous phase facilitated the diffusion of the amine monomer and the formation of nanovoids within the PA layer as the C-chain length of amides increased. When 1,2-dichloroethane was also included in the organic phase, the extent of the two-phase miscible zone was further increased with its assistance, which contributed to generating the larger nanovoids within the layer, thicker PA layer and extensive exterior PA layers, as well as significantly enhancing the water permeability and selectivity of membranes. Importantly, this study successfully prepared high-performance RO membranes with multilayer nanovoid structures in situ by introducing cosolvents in the IP reaction with permeability up to 2.26 L·m −2 ·h −1 ·bar −1 , providing theoretical and experimental bases for further enrichment of CAIP.
研究领域:
材料科学
·
化学工程
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xiaojuan Wang,Houkang Pu,Hanjing Xue,Huacheng Xu,Yijun Huang,Xinyan Wang,Congjie Gao,Xueli Gao
The robust correlation between the performance of thin-film composite (TFC) reverse osmosis membranes and the polyamide (PA) active layer determines the necessity of precise design of the PA layer, and this regulation primarily involves the surface morphology and internal characteristics of the PA layer. In this study, we fabricated honeycomb Turing structure or nanovoid-rich TFC series membranes using polar/nonpolar organic phase additives. Characterization and simulation results confirmed that the enhancement of membrane performance relied more on the abundant nanovoids within the PA layer rather than the ordered honeycomb lattice surface. Notably, the TFC-nDCE membrane with multilayer nanovoids exhibited an approximately 89 % improvement in water permeability while maintaining satisfactory salt rejection (98.29 %). We emphasized the significant role of nanovoids in the diffusion process of amine monomers and investigated the potential relationship between nanovoids and the degree of surface cross-linking. Building upon this, a new insight into the formation of nanovoids induced by PA anisotropic growth was presented through a careful analysis of the amine monomer diffusion rate and the morphological evolution of nanovoids. The structure-property relationship between internal structures, surface morphologies, and performances was systematically and thoroughly investigated, pointing out the direction for the rational design of TFC membranes .
研究领域:
材料科学
·
膜技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Deliang Zhu,Xiaoyu Ji,Jiangnan Li,Chengyang Zhu,Hongyan Tang
Membrane fouling in water treatment impacts the efficiency and lifetime of nanofiltration (NF) membranes. Between the polyvinylidene fluoride (PVDF) substrate and the polyamide (PA) layer, sodium alginate (SA) hydrogel interlayers were introduced in this study. Subsequently, nano-CaCO 3 was deposited on the SA hydrogel interlayers membrane (PA-Alg membrane), encapsulated within the membrane using the interfacial polymerization (IP), and dissolved with acid to form nanovoids. Thus, NF membranes with excellent antifouling property and high permeability were fabricated. The SA hydrogel interlayers and the deposition and dissolution of nano-CaCO 3 were verified by X-ray photoelectron spectroscopy and Fourier transform infrared. A smooth membrane surface was observed using scanning electron microscopy and atomic force microscopy. The flux of the SA hydrogel interlayers and nanovoids (PA-Alg-NV) membrane was 86 % greater than that of the pristine membrane. The rejection values of the PA-Alg-NV membrane for MgSO 4 and MgCl 2 were 95.6 % and 95.1 %, respectively. The flux recovery ratio for humic acid, bovine serum albumin, oil/water emulsion, and SA through PA-Alg-NV membrane were 97.2 %, 97.3 %, 97.4 %, and 97.9 %, respectively. Long-term fouling tests and ten-cycle fouling tests indicated that the PA-Alg-NV membrane exhibited stable antifouling property. In general, the high permeability and excellent antifouling property of the PA-Alg-NV membrane were attributed to the SA hydrogel interlayers, which increased hydrophilicity and reduced PA layer intrusion into the pores, forming a thin and smooth surface. In addition, the permeability was further enhanced by the nanovoids within the membrane. This study presented an efficient approach for fabricating NF membranes with excellent antifouling property and high permeability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Qiang Xue,Wenqiao Meng,Qing Fang,Jinyuan Zhu,Kaisong Zhang
Over the last decade, thin-film nanocomposite (TFN) membranes have been extensively utilized in desalination and wastewater treatment. The most reported nanochannels in the TFN membranes lack sufficient observational evidence. We conducted a systematic study on the TFN membrane that incorporated two-dimensional (2D) MXene nanosheets and provided evidence that nanovoids existed in the polyamide layer surrounding the nanosheets. The nanovoids functioned as nanochannels for water, which led to a significant increase in membrane permeance by 2.8 times compared to the blank membrane. The Na2SO4 rejection of the MXene polyamide membrane is as high as 96.4% and has obvious advantages in seawater desalination. The size of the nanochannels was correlated with the quantity, size, and spreadability of MXene nanosheets. Larger water nanochannels could be formed if there is a considerable amount and size of nanosheets, and they were evenly distributed. After being subjected to a sustained pressure environment, the nanochannels remained intact and the membrane maintained its excellent permeance across varying pressures. Our work could offer a perspective on the generation of internal nanochannels in the TFN membrane and optimize nanochannels to provide better desalination performance.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yue Tian,Xiaoyan Liu,Xiaoqing Cao,Dieqing Zhang,Shuning Xiao,Xinru Li,Zaiyuan Le,Xianyang Li,Hexing Li
1T MoS 2 has recently attracted growing interests for energy storage due to the excellent conductivity, expanded layer space and extra exposed active sites. However, its application is still limited due to the complicated synthesis under harsh condition and poor structural stability. Herein, we report a novel MoS 2 /Cu nanowires (NWs) by microwave-assisted self-assembly of ultrathin 1T MoS 2 onto Cu NWs with interconnected conductive network and robust one-dimensional (1D) structure. As anode material for LIBs, 1T MoS 2 /Cu NWs exhibits high capacity and stability owning to the enhanced electron transport and lithium ions intercalation. Meanwhile, the enriched nanovoids supply extended space for buffering the volume change and boosting electrolyte penetration during cycling process. Moreover, Cu doped MoS 2 could also stabilize the 1T phase, leading to the excellent anode durability. It delivers a high reversible capacity of 570.6 mAh g −1 after 250 cycles at a current density of 0.5 A g −1 . Enhanced rate performance is also achieved with excellent capacity retention of 914.6 mAh g −1 at 0.1 A g −1 and 465.2 mAh g −1 at 2 A g −1 , respectively.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）