Multilevel/hierarchical nanocomposite imprinted regenerated cellulose membranes for high-efficiency separation: A selective recognition method with Au/PDA-loaded surface

2021 ◽  
Author(s):  
Ming Yan ◽  
Yilin Wu ◽  
Rongxin Lin ◽  
Faguang Ma ◽  
Zhongyi Jiang
Keyword(s):  
Molecular Imprinting ◽  
High Efficiency ◽  
Selective Separation ◽  
Selective Recognition ◽  
Regenerated Cellulose ◽  
Separation Performance ◽  
Recognition Method ◽  
Membrane Materials ◽  
Loaded Surface ◽  
Cellulose Membranes

Although many researchers have done lots of studies on improving the selective separation performance of membrane materials, conceptions and applications of membrane-based molecular imprinting separation&recognition with both high permselectivity and...

Dot-matrix-initiated molecularly imprinted nanocomposite membranes for selective recognition: a high-efficiency separation system with an anti-oil fouling layer

2021 ◽  
Author(s):  
Jia Gao ◽  
Li Chen ◽  
Yongsheng Yan ◽  
Jian Lu ◽  
Wendong Xing ◽  
...  
Keyword(s):  
High Efficiency ◽  
Selective Separation ◽  
Selective Recognition ◽  
Separation System ◽  
Nanocomposite Membranes ◽  
Molecularly Imprinted ◽  
Specific Recognition ◽  
Oil Fouling

Dot-matrix-initiated molecularly-imprinted nanocomposite membranes with high selective separation ability and anti-oil fouling performance were first proposed and developed for the specific recognition and separation of paclitaxel.

scholarly journals High-efficiency CO2 separation using hybrid LDH-polymer membranes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaozhi Xu ◽  
Jiajie Wang ◽  
Awu Zhou ◽  
Siyuan Dong ◽  
Kaiqiang Shi ◽  
...  
Keyword(s):  
Self Assembly ◽  
High Efficiency ◽  
Transmission Rate ◽  
Spray Coating ◽  
Separation Performance ◽  
Pdms Layer ◽  
Operational Testing ◽  
Enhanced Solubility ◽  
Double Hydroxide

AbstractMembrane-based gas separation exhibits many advantages over other conventional techniques; however, the construction of membranes with simultaneous high selectivity and permeability remains a major challenge. Herein, (LDH/FAS)n-PDMS hybrid membranes, containing two-dimensional sub-nanometre channels were fabricated via self-assembly of unilamellar layered double hydroxide (LDH) nanosheets and formamidine sulfinic acid (FAS), followed by spray-coating with a poly(dimethylsiloxane) (PDMS) layer. A CO2 transmission rate for (LDH/FAS)25-PDMS of 7748 GPU together with CO2 selectivity factors (SF) for SF(CO2/H2), SF(CO2/N2) and SF(CO2/CH4) mixtures as high as 43, 86 and 62 respectively are observed. The CO2 permselectivity outperforms most reported systems and is higher than the Robeson or Freeman upper bound limits. These (LDH/FAS)n-PDMS membranes are both thermally and mechanically robust maintaining their highly selective CO2 separation performance during long-term operational testing. We believe this highly-efficient CO2 separation performance is based on the synergy of enhanced solubility, diffusivity and chemical affinity for CO2 in the sub-nanometre channels.

Selective separation of quercetin by molecular imprinting using chitosan beads as functional matrix

2006 ◽  
Vol 66 (12) ◽  
pp. 1734-1740 ◽  
Author(s):  
Yong-qing Xia ◽  
Tian-ying Guo ◽  
Mou-dao Song ◽  
Bang-hua Zhang ◽  
Bao-long Zhang
Keyword(s):  
Molecular Imprinting ◽  
Selective Separation ◽  
Chitosan Beads ◽  
Functional Matrix

scholarly journals Affinity Membranes and Monoliths for Protein Purification

Membranes ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 1 ◽  
Author(s):  
Eleonora Lalli ◽  
Jouciane S. Silva ◽  
Cristiana Boi ◽  
Giulio C. Sarti
Keyword(s):  
Binding Capacity ◽  
Stationary Phases ◽  
Packed Column ◽  
Downstream Processing ◽  
Regenerated Cellulose ◽  
Affinity Capture ◽  
Scale Characterization ◽  
Set Up ◽  
Cellulose Membranes ◽  
Chromatographic Media

Affinity capture represents an important step in downstream processing of proteins and it is conventionally performed through a chromatographic process. The performance of this step highly depends on the type of matrix employed. In particular, resin beads and convective materials, such as membranes and monoliths, are the commonly available supports. The present work deals with non-competitive binding of bovine serum albumin (BSA) on different chromatographic media functionalized with Cibacron Blue F3GA (CB). The aim is to set up the development of the purification process starting from the lab-scale characterization of a commercially available CB resin, regenerated cellulose membranes and polymeric monoliths, functionalized with CB to identify the best option. The performance of the three different chromatographic media is evaluated in terms of BSA binding capacity and productivity. The experimental investigation shows promising results for regenerated cellulose membranes and monoliths, whose performance are comparable with those of the packed column tested. It was demonstrated that the capacity of convective stationary phases does not depend on flow rate, in the range investigated, and that the productivity that can be achieved with membranes is 10 to 20 times higher depending on the initial BSA concentration value, and with monoliths it is approximately twice that of beads, at the same superficial velocity.

scholarly journals Galactoglucomannan Recovery with Hydrophilic and Hydrophobic Membranes: Process Performance and Cost Estimations

Membranes ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 99 ◽  
Author(s):  
Basel Al-Rudainy ◽  
Mats Galbe ◽  
Frank Lipnizki ◽  
Ola Wallberg
Keyword(s):  
Membrane Fouling ◽  
Raw Material ◽  
Regenerated Cellulose ◽  
Hydrophobic Membrane ◽  
Polysulfone Membrane ◽  
Hydrophobic Membranes ◽  
Separation Degree ◽  
Cost Efficient ◽  
Cellulose Membranes ◽  
Hydrophilic Membranes

In this study, we compared the GR51PP (hydrophobic/polysulfone) membrane with a series of hydrophilic (regenerated cellulose) membranes with the aim of increasing the retention of products and decreasing membrane fouling. The raw material used was a sodium-based spent sulfite liquor from the sulfite pulping process of spruce and pine. The results show that the hydrophilic membranes were superior to the hydrophobic membranes in terms of higher fluxes (up to twice the magnitude), higher product retentions and less fouling (up to five times lower fouling). The fouling was probably caused by pore blocking as observed in earlier studies. However, the hydrophilic membranes had a lower affinity for lignin, which was indicated by the lower retention and fouling. This also resulted in a separation degree, which was higher compared with the hydrophobic membrane, thus yielding a higher galactoglucomannan (GGM) purity. 2D HSQC NMR results show that no major structural differences were present in the hydrophilic and hydrophobic retentates. A techno-economical evaluation resulted in the RC70PP being chosen as the most cost-efficient membrane in terms of flux and product recovery.

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