Membrane-associated molecularly imprinted surfaces with tailor-made SiO2@polydopamine-based recognition sites for selective separation of artemisinin

Wu, Yilin; Lin, Rongxin; Ma, Faguang; Jiang, Zhongyi

doi:10.1016/j.colsurfa.2021.126645

Cited by 11 publications

(6 citation statements)

References 54 publications

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“…Therefore, it can be concluded that the PPIM has a good separation effect toward ART and ARE during the first 30 min. Table 2 shows the comparison of the fluxes (J) and the selectivity between the PPIM in this work and the separation materials in previous research [28][29][30][31][32]. The membrane flux (800 L/m 2 /h) of the PPIM was much higher than most of the imprinted membranes, as was the selective separation factor (α ART/ARE ).…”

Section: Crossflow Selective Separationmentioning

confidence: 76%

Three-Dimensional Porous PVDF Foam Imprinted Membranes with High Flux and Selectivity toward Artemisinin/Artemether

Bian,

Zhang,

Chen

et al. 2023

Molecules

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In this study, a new 3D porous PVDF-foam-imprinted membrane (PPIM) for the selective separation of artemisinin (ART) was first prepared via the dopamine adhesion of pre-synthesized MIPs into the interior of the PPIM. In the PPIM, the pre-synthesized molecularly imprinted polymers (MIPs) with artesunate (ARU) as a dummy template were uniformly loaded on the interior of the membrane, avoiding the defects of recognition site encapsulation found in the conventional membrane. This membrane also exhibited excellent flux, which is beneficial in practical separation applications. The PPIM was systematically characterized via FT-IR, SEM, pore-size distribution analysis, water contact angle test, membrane flux, and mechanical performance analysis, respectively. In the static adsorption experiment, the pseudo-second-order kinetic model better fitted the rebinding data of ART. Under dynamic conditions, the ART adsorption capacity of the PPIM could be further remarkably improved by tailoring the flow rate to 3 mL min−1. In the selective separation experiment, with artemether (ARE) as the competition substrate, the selective separation ability (α) of the PPIM towards ART/artemether (ARE) reached its peak value (3.16) within only 10 min at this flow rate, which is higher than that of porous PVDF foam non-imprinted membranes (PPNM) (ca. 1.5), showing great separation efficiency in a short time. Moreover, the PPIM can be reused five times without a significant decrease in its adsorption capacities, showing good regeneration performance. This work highlights a simple strategy for constructing new MIMs with high flux and great mechanical strength to achieve the efficient selective separation of ART and ARE in practical applications.

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Section: Crossflow Selective Separationmentioning

confidence: 76%

Three-Dimensional Porous PVDF Foam Imprinted Membranes with High Flux and Selectivity toward Artemisinin/Artemether

Bian,

Zhang,

Chen

et al. 2023

Molecules

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“…The reaction proceeded for another 0.5 h. Twenty mg of CF@MnO 2 @Ni(OH) 2 was dispersed into the solution and stirred under magnetic agitation for 30 min. Afterward, 0.5 mL of ammonia aqueous was added dropwise to trigger the sol–gel imprinted process . After reaction at 25 °C for 6 h, the product was collected by centrifugation and washed thoroughly with ethanol and deionized water to remove the unreacted reagents.…”

Section: Methodsmentioning

confidence: 99%

“…Afterward, 0.5 mL of ammonia aqueous was added dropwise to trigger the sol−gel imprinted process. 38 After reaction at 25 °C for 6 h, the product was collected by centrifugation and washed thoroughly with ethanol and deionized water to remove the unreacted reagents. An elution composed of methanol/acetic acid solution (9:1, v/v) was used to extract template SA from the imprinted product in the imprinted network.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Construction of Sustainable Biomass Bubble Propulsion Micromotor and Selective Recognition/Separation of Shikimic Acid with Open 3D Target Imprinting Cavity

Zhu,

Shao,

Yuan

et al. 2023

ACS Sustainable Chem. Eng.

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Self-propelled nano/micromotors that harvest external energy from the surrounding environment and transform it into the power for autonomous movement have manifested great potential in the separation field. In this work, a bubble-propelled hierarchical bifunctional monomer imprinted micromotor has been demonstrated based on natural cotton fiber (CF) biomass as a platform and MnO 2 as the catalytic medium. CF@MnO 2 is loaded with Ni(OH) 2 nanosheets by a simple hydrothermal reaction, displaying an open three-dimensional structure with a large specific surface area for the construction of an imprinted layer. The covalent functional monomer 3-aminophenylboronic acid (APBA) and noncovalent functional monomer (3-aminopropyl)triethoxysilane (APTES) were used to create imprinted cavities for the target. Such a micromotor (CF@MnO 2 @Ni(OH) 2 -MIPs) performs self-propulsion behavior powdered by the decomposition of H 2 O 2 fuel and possesses accessible recognition sites for the selective recognition and separation of shikimic acid (SA), which reinforces the adsorption kinetics process and separation specificity. The micromotor shows a maximal adsorption capacity of 127.1 mg g −1 at pH 7.5 in the presence of H 2 O 2 , which has risen by 20.9% compared with the counterpart without H 2 O 2 . In addition, the adsorption performance of the micromotor fits well with pseudo-second-order (PSO) kinetics and the Langmuir isotherm model, suggesting that chemisorption is the main rate determination step and the adsorption process is a single-layer adsorption. The adsorption quantity of SA is 4.74 times, 4.58 times, and 4.33 times higher than that of hydroquinone (HDQ), p-hydroxybenzoic acid (PHB), and Quercetin, respectively, implying the bifunctional monomer imprinted strategy enhances the affinity of CF@MnO 2 @Ni(OH) 2 -MIPs for SA. After five capture/release cycles, the adsorption capacity remains above 95%. This work provides new insight into the design of potential materials for the adsorption of SA, which may open up new avenues for fabricating advanced adsorbents for the practical separation of natural products.

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“…This often results in a variety of structurally different prepolymerization complexes, since the strength of binding with compounds of similar properties can be similar [72,73]. The structure of the crosslinker is also important in an additional way: Multifunctional crosslinkers result in fully-crosslinked materials with a lower molar ratio than difunctional crosslinkers, since one molecule can connect more than two polymer chains [36,37,42,56,58,59,72,76].…”

Section: The Effect Of Porogen and Crosslinking On Imprinted Materialsmentioning

confidence: 99%

A Note about Crosslinking Density in Imprinting Polymerization

Mueller

2021

Molecules

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Imprinting polymerization is an exciting technique since it leads to specific binding sites, which are the basis of a variety of applications, such as sensors, detectors, and catalysts. The specific binding sites are created using templates and then fixing the structure of the binding site with crosslinking. The literature review of imprinting polymerizations shows that the crosslinking density governs the physical properties of the resulting molecularly imprinted polymer (MIP). It is also a factor governing the capacity and the selectivity of MIPs. Reviewing polymer science data and theory, the crosslinking density commonly used in MIP synthesis is unusually high. The data reviewed here suggest that more research is needed to determine the optimal crosslinking density for MIPs.

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Membrane-associated molecularly imprinted surfaces with tailor-made SiO2@polydopamine-based recognition sites for selective separation of artemisinin

Cited by 11 publications

References 54 publications

Three-Dimensional Porous PVDF Foam Imprinted Membranes with High Flux and Selectivity toward Artemisinin/Artemether

Three-Dimensional Porous PVDF Foam Imprinted Membranes with High Flux and Selectivity toward Artemisinin/Artemether

Construction of Sustainable Biomass Bubble Propulsion Micromotor and Selective Recognition/Separation of Shikimic Acid with Open 3D Target Imprinting Cavity

A Note about Crosslinking Density in Imprinting Polymerization

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