Polydopamine-coated cellulose acetate butyrate microbeads for caffeine removal

Furtado, Laíse M.; Ando, Rômulo Augusto; Petri, Denise Freitas Siqueira

doi:10.1007/s10853-019-04169-1

Cited by 17 publications

(4 citation statements)

References 49 publications

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“…Most characteristic band positions and intensities are recovered for both the PDA spectrum and the subtracted one, shown as a red line. The spectral band positions of the PDA phase, reported in Table , are consistent with other reports, − and assignments are based on literature data and on the comparison with pyrrole, indole, and catechol structures . These results prove that the ATR-FTIR technique is a fast and cost-effective characterization method to detect and investigate polymer shells and thin PDA coatings, even though they represent a small fraction of the total sample mass and their spectroscopic signals are not identified by sharp peaks.…”

Section: Resultsmentioning

confidence: 99%

Bioinspired Polydopamine Coating as an Adhesion Enhancer Between Paraffin Microcapsules and an Epoxy Matrix

et al. 2020

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Microencapsulated phase change materials (PCMs) are attracting increasing attention as functional fillers in polymer matrices, to produce smart thermoregulating composites for applications in thermal energy storage (TES) and thermal management. In a polymer composite, the filler–matrix interfacial adhesion plays a fundamental role in the thermomechanical properties. Hence, this work aims to modify the surface of commercial PCM microcapsules through the formation of a layer of polydopamine (PDA), a bioinspired polymer that is emerging as a powerful tool to functionalize chemically inert surfaces due to its versatility and great adhesive potential in many different materials. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) evidenced that after PDA coating, the surface roughness increased from 9 to 86 nm, which is beneficial, as it allows a further increase in the interfacial interaction by mechanical interlocking. Spectroscopic techniques allowed investigating the surface chemistry and identifying reactive functional groups of the PDA layer and highlighted that, unlike the uncoated microcapsules, the PDA layer is able to react with oxirane groups, thereby forming a covalent bond with the epoxy matrix. Hot-stage optical microscopy and differential scanning calorimetry (DSC) highlighted that the PDA modification does not hinder the melting/crystallization process of the paraffinic core. Finally, SEM micrographs of the cryofracture surface of epoxy composites containing neat or PDA-modified microcapsules clearly evidenced improved adhesion between the capsule shell and the epoxy matrix. These results showed that PDA is a suitable coating material with considerable potential for increasing the interfacial adhesion between an epoxy matrix and polymer microcapsules with low surface reactivity. This is remarkably important not only for this specific application but also for other classes of composite materials. Future studies will investigate how the deposition parameters affect the morphology, roughness, and thickness of the PDA layer and how the layer properties influence the capsule–matrix adhesion.

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Section: Resultsmentioning

confidence: 99%

Bioinspired Polydopamine Coating as an Adhesion Enhancer Between Paraffin Microcapsules and an Epoxy Matrix

et al. 2020

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“…This work provides good insights for phenols removal using magnetic composites in the future. PDA-functionalized cellulose acetate butyrate microbeads were used to remove caffeine (40%) (Furtado et al 2020). Density functional theory (DFT) calculations indicated that the adsorption mechanism may be due to the synergistic interactions (including π-π stacking and Hbonding) between PDA and caffeine.…”

Section: Adsorption Of Heavy Metals and Organic Pollutantsmentioning

confidence: 99%

Polydopamine-based polysaccharide materials for water treatment

et al. 2022

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Low-cost polysaccharides, such as cellulose, chitosan, chitin and alginate, have come into people's sight for water treatment. Nevertheless, their treatment e ciency and capability are sometimes unsatisfactory because of the lack of active sites and functionalities. In recent years, more and more attentions have been paid to the integration of polydopamine (PDA) into polysaccharide-based materials to develop highperformance products for wastewater treatment. PDA modi cation can endow polysaccharides with plentiful functional moieties (including catechol, amine, and phenyl groups) for binding heavy metals and organic pollutants. PDA coatings may increase interfacial stability and hydrophilicity for oil/water separation. PDA also may anchor various catalysts for catalytic degradation of organic pollutants.Furthermore, the good light-harvesting capability and photothermal transformation feature of PDA are available for solar-driven water puri cation. This review aims to give the comprehensive overview on the development of PDA-based polysaccharide materials for water treatment. PDA-based polysaccharide materials can be made into cost-effective and high-performance products (including hydrogels, aerogels, membrane, beads and nanocomposites) for adsorption of heavy metals and organic pollutants, oil/water separation, catalytic degradation of organic pollutants, and solar-driven water puri cation. This review will give a valuable information for the design and exploitation of PDA-based polysaccharide materials in water treatment.

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“…Cellulose acetate butyrate (CAB) with its functional acetyl and butyryl group is a biodegradable and chemically stable cellulose derivative of plant sources [13,14] and due to its stability, biodegradability, and ease of surface modification dependent on its functional surface groups, the different forms of CAB or the cellulose based materials i. e., nanofibers, [15,16] beads, [17][18][19] membrane, [20] and monolith [21] have been extensively used in diverse applications ranging from the adsorption studies to biomedical applications including drug delivery studies, tissue engineering, and affinity chromatography applications. Moreover, the À NH 2 functionalized cellulose based adsorbents like beads, nanofibers, and its composites have been utilized in heavy metal [22][23][24][25] and dye removal applications.…”

Section: Introductionmentioning

confidence: 99%

DNA Adsorption Capabilities of Amine Functionalized Magnetic Cellulose Acetate Butyrate Beads from Aqueous Solution

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2024

ChemistrySelect

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In this work, the magnetic cellulose acetate butyrate beads (mCABs) were prepared and then, their surfaces were modified with [(3‐Aminopropyl) triethoxysilane)] (APTES) solution to generate amine groups (−NH2) as a ligand for DNA adsorption in the aqueous solution. After the surface modification, the −NH2 functionalized mCABs (N−mCABs) were characterized with Fourier Transform Infrared Spectroscopy (FTIR), scanning electron microscope (SEM), and energy dispersive X‐ray (EDX) analysis. The optimum pH value of DNA adsorption was observed at pH 4 and at this point, the N−mCABs adsorbed 4.27 mg/g DNA at room temperature (RT). The maximum adsorbed amount of DNA was calculated as 5.24 mg/g and the DNA adsorption was exothermic; furthermore, DNA adsorption was monolayer and the Langmuir adsorption model was more fitted than the Freunclich isotherm model due to the regression coefficient (R2), and the qmax values of the Langmuir model. According to reusability studies, the prepared adsorbent protected its stability and the adsorption capacity after the 5 consecutive adsorption, desorption, and regeneration cycles.

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Polydopamine-coated cellulose acetate butyrate microbeads for caffeine removal

Cited by 17 publications

References 49 publications

Bioinspired Polydopamine Coating as an Adhesion Enhancer Between Paraffin Microcapsules and an Epoxy Matrix

Bioinspired Polydopamine Coating as an Adhesion Enhancer Between Paraffin Microcapsules and an Epoxy Matrix

Polydopamine-based polysaccharide materials for water treatment

DNA Adsorption Capabilities of Amine Functionalized Magnetic Cellulose Acetate Butyrate Beads from Aqueous Solution

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