Polyphenol engineered membranes with dually charged sandwich structure for low-pressure molecular separation

Xu, Shu; Lu, Dongwei; Wang, Panpan; Zhao, Yumeng; Sun, Yan; Qi, Jingyao; Ma, Jun

doi:10.1016/j.memsci.2020.117885

Cited by 36 publications

(12 citation statements)

References 42 publications

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“…The rejection efficiencies of the negatively charged membrane (Nylon 66), positively charged membrane (poly(ethersulfone)), and neutral membrane (mixed cellulose) were investigated to verify the rejection mechanism. 31 As shown in Figure 5I, the anionic Cu NPs were mainly rejected by the negatively charged nylon 66 membrane by the electrostatic repulsion. In contrast, the high rejection was observed for cationic Ag NPs filtration.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

“…The ζ-potential analysis results show that the poly-T-templated Cu NPs and amino-modified Ag NPs have a negative charge and a positive charge (−33.5 and 13.2 mV), respectively. The rejection efficiencies of the negatively charged membrane (Nylon 66), positively charged membrane (poly(ethersulfone)), and neutral membrane (mixed cellulose) were investigated to verify the rejection mechanism . As shown in Figure I, the anionic Cu NPs were mainly rejected by the negatively charged nylon 66 membrane by the electrostatic repulsion.…”

Section: Resultsmentioning

confidence: 99%

“…The rejection of the membrane is dominated by the pore diameter as well as the effective surface charge. 31 As the nanoparticles (Cu NPs, CdTe QDs, and Ag NPs) used in the current study were smaller than the pore size (0.22 μm), the size change of these NPs before and after filtration was first investigated by a laser particle size analyzer. As shown in Figure 5A, due to the small particle size of CdTe QDs, there is no significant difference in the size in the filtration procedure.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Filter-Assisted Separation of Multiple Nanomaterials: Mechanism and Application in Atomic/Mass Spectrometry/Fluorescence Label-Free Multimode Bioassays

et al. 2021

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Atomic spectrometry (AS) has been widely used in bioassay, but it requires steps to immobilize or separate the signal molecules. In this work, based on the phenomenon that the filter membrane can selectively separate multiple nanomaterials (nanoparticles (NPs) and quantum dots (QDs)) and its related ions, including poly(thymine)-templated Cu NPs and free Cu2+, Ag NPs and free Ag+, CdTe QDs and Cd2+, we constructed multimode and label-free biosensors by chemical vapor generation–atomic fluorescence spectrometry (CVG-AFS), inductively coupled plasma mass spectrometry (ICP-MS), and fluorescence. In this strategy, terminal deoxynucleotidyl transferase (TdT) and polynucleotide kinase (PNK), H2O2, and mucin 1 can be sensitively detected using Cu2+, Ag+, and Cd2+ as the signal probe, respectively. As a result, TdT and T4 PNK in single cells level can be accurately quantified. In addition, the possible separation mechanism of filter membrane was proposed, both Donnan repulsion by charged functional layer and entrapment effect by nanomaterials size contributed to the outstanding separation performance. Subsequently, on the basis that CdTe QDs can selectively identify Cu NPs/Cu2+, Ag NPs/Ag+, and C–Ag+–C/Ag+, cation-exchange reaction (CER) was introduced in this platform due to its unique advantages, including improving the sensitivity of the above system (an order of magnitude), converting the non-CVG metal elements into CVG elements, and using low-cost AFS to substitute the high-cost ICP-MS. In addition, we performed theoretical calculations of the selective CER using density functional theory (DFT). Therefore, this label-free and simple separation AS/ICP-MS sensing platform shows great potential for biomarker analysis.

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Section: ■ Results and Discussionmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Filter-Assisted Separation of Multiple Nanomaterials: Mechanism and Application in Atomic/Mass Spectrometry/Fluorescence Label-Free Multimode Bioassays

et al. 2021

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“…Factors such as origin of foulants, pore size and materials used play a vital role during characterization and control aspects (Chang et al 2019 ). There have been several studies done to reduce the blockage of membranes and fabrication improvements (Dickhout et al 2019 ; Li et al 2020 ; Xu et al 2020 ). Due to this reason, many membranes are used more as a purification process than as an extraction technology.…”

Section: Extraction Methods Of Polyphenolsmentioning

confidence: 99%

Techniques and modeling of polyphenol extraction from food: a review

et al. 2021

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There is a growing demand for vegetal food having health benefits such as improving the immune system. This is due in particular to the presence of polyphenols present in small amounts in many fruits, vegetables and functional foods. Extracting polyphenols is challenging because extraction techniques should not alter food quality. Here, we review technologies for extracting polyphenolic compounds from foods. Conventional techniques include percolation, decoction, heat reflux extraction, Soxhlet extraction and maceration, whereas advanced techniques are ultrasound-assisted extraction, microwave-assisted extraction, supercritical fluid extraction, high-voltage electric discharge, pulse electric field extraction and enzyme-assisted extraction. Advanced techniques are 32-36% more efficient with approximately 15 times less energy consumption and producing higher-quality extracts. Membrane separation and encapsulation appear promising to improve the sustainability of separating polyphenolic compounds. We present kinetic models and their influence on process parameters such as solvent type, solid and solvent ratio, temperature and particle size.

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“…Recently, NF membrane with dually charged composite layer has attracted increasing attention. Such opposite charge pattern is conducive to reject both cations and anions as well as improve the anti‐fouling performance [40].…”

Section: High‐performance Nf Membranes For Bio‐separationmentioning

confidence: 99%

Nanofiltration membrane for bio‐separation: Process‐oriented materials innovation

Cao

Chen

Wan

et al. 2021

Engineering in Life Sciences

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Nanofiltration (NF) with advantages of high efficiency and low‐cost has attracted increasing attentions in bio‐separation. However, the large‐scale application is limited by the inferior molecular selectivity, low chemical stability and serious membrane fouling. Many efforts, thus, have been devoted in NF materials design for specific applications to enhance the separation efficiency of bio‐products and increase membrane life‐time, as well as reduce the operating cost. This review summarized the recent progress of NF applications in bio‐separation, discussed various demands for NF membrane in the bio‐products purification and corresponding material innovations, finally proposed several practical suggestions for future research, which provided directions and guidance toward further product development and process industrialization.

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Polyphenol engineered membranes with dually charged sandwich structure for low-pressure molecular separation

Cited by 36 publications

References 42 publications

Filter-Assisted Separation of Multiple Nanomaterials: Mechanism and Application in Atomic/Mass Spectrometry/Fluorescence Label-Free Multimode Bioassays

Filter-Assisted Separation of Multiple Nanomaterials: Mechanism and Application in Atomic/Mass Spectrometry/Fluorescence Label-Free Multimode Bioassays

Techniques and modeling of polyphenol extraction from food: a review

Nanofiltration membrane for bio‐separation: Process‐oriented materials innovation

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