Fabrication of amphoteric lignin and its hydrophilicity/oleophilicity at oil/water interface

Kazzaz, Armin Eraghi; Fatehi, Pedram

doi:10.1016/j.jcis.2019.11.111

Cited by 22 publications

(5 citation statements)

References 71 publications

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“…The two peaks are located at 7.5-7.0 ppm, which are assigned to the ortho-, para-and meta-positions on the benzene ring, respectively. The broad peak at 7.0-6.3 ppm is attributed to the aromatic proton in the guaiacyl unit [19], 4.0-3.5 ppm to the methoxy proton signal, the sharp peak at 3.5-3.3 ppm to the proton signal of water in the solvent and the small peak at 3.4 ppm to the proton signal in choline chloride. During treatment, there may have been some interaction between the lignin and the solvent choline chloride, which may have caused this peak to form, or there may have been a small quantity of deep eutectic solvent left over [4].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Symmetrical Capacitors from Lignin-Derived Phenol and PANI Composites with Good Electrical Conductivity

Wang

et al. 2023

IJMS

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As a natural polymer, lignin is only less abundant in nature than cellulose. It has the form of an aromatic macromolecule, with benzene propane monomers connected by molecular bonds such as C-C and C-O-C. One method to accomplish high-value lignin conversion is degradation. The use of deep eutectic solvents (DESs) to degrade lignin is a simple, efficient and environmentally friendly degradation method. After degradation, the lignin is broken due to β-O-4 to produce phenolic aromatic monomers. In this work, lignin degradation products were evaluated as additives for the preparation of polyaniline conductive polymers, which not only avoids solvent waste but also achieves a high-value use of lignin. The morphological and structural characteristics of the LDP/PANI composites were investigated using 1H NMR, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis and elemental analysis. The LDP/PANI nanocomposite provides a specific capacitance of 416.6 F/g at 1 A/g and can be used as a lignin-based supercapacitor with good conductivity. Assembled as a symmetrical supercapacitor device, it provides an energy density of 57.86 Wh/kg, an excellent power density of 952.43 W/kg and, better still, a sustained cycling stability. Thus, the combination of polyaniline and lignin degradate, which is environmentally friendly, amplifies the capacitive function on the basis of polyaniline.

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Section: Resultsmentioning

confidence: 99%

Preparation of Symmetrical Capacitors from Lignin-Derived Phenol and PANI Composites with Good Electrical Conductivity

Wang

et al. 2023

IJMS

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“…In addition, with the increase in lignin, the oil‐wet part increased, which can better wet and infiltrate oil droplets. [ 35 ] Therefore, it can be inferred that the content of lignin increased and the lipophilicity increased.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Composite Lignin Colloids Prepared with a Convenient Patching Method for Generally Treating Heterogeneous Oily Wastewater

Bai

Kong

Yang

et al. 2023

Part & Part Syst Charact

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The key to the efficient use of biomass resources is the rational design and preparation of lignin‐based fine chemicals. In this investigation, the colloidal self‐assembly structure formed by lignin in good solvents is used as the module, magnetic Fe3O4 nanoparticles are taken as the carrier, and magnetic composite lignin nanoparticles are prepared in batches by a rapid and convenient surficial grafting (patching) process. The varying amphiphilicity and wettability of lignin are influenced by the various types of wetting solvents. Its wetting behavior can be regulated to achieve oil–water separation in different adsorption or/and emulsification processes. This study provides a novel tool for industrial oil–water separation and, thus, general oily wastewater treatment.

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“…Contact Angle Analysis. This analysis was performed following the literature methdology 38 for the antibiotic-and CNCcovered surfaces. For diffusion analysis, a drop of each antibiotic solution (100 mg/L) was placed onto CNC surfaces in a confined glass chamber, and their diffusivity analysis was performed for 5 min via analyzing the contact angle of the droplets on the surface.…”

Section: Methodsmentioning

confidence: 99%

Interaction of Carboxyalkylated Cellulose Nanocrystals and Antibiotics

Feizi

Fatehi

2021

ACS Appl. Bio Mater.

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Although antibiotics are beneficial for treating infections, their release into the environment has raised global concerns. In this work, the interactions of cellulose nanocrystal (CNC) derivatives with sulfamethoxazole (SMX), ciprofloxacin (CIP), and doxycycline (DOX) antibiotics were studied fundamentally. CNC was carboxyalkylated to bear different carbon chain lengths but similar negative charges on its surface. The highest level of adsorption of DOX on the carboxypantadecanated CNC (i.e., carboxyalkylated CNC with more carbon spacer, PCNC) occurred at pH 6.0, which was due to the electrostatic and π interactions along with hydrogen bonding. The contact angle and quartz crystal microbalance (QCM) adsorption analyses revealed a faster interaction and adsorption of DOX than other antibiotics on PCNC. The results also depicted the diffusion of DOX into the porous structure of CNC derivatives, especially that of PCNC. Also, a more compact adsorbed layer of DOX was formed on PCNC than on other CNC derivatives. Carboxyalkylation was observed to slightly reduce the surface area of CNC, while the antibiotic adsorption drastically increased the surface area of CNC due to their adsorption on the surface. XPS analysis revealed that carboxyalkylation significantly enhanced the

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Fabrication of amphoteric lignin and its hydrophilicity/oleophilicity at oil/water interface

Cited by 22 publications

References 71 publications

Preparation of Symmetrical Capacitors from Lignin-Derived Phenol and PANI Composites with Good Electrical Conductivity

Preparation of Symmetrical Capacitors from Lignin-Derived Phenol and PANI Composites with Good Electrical Conductivity

Magnetic Composite Lignin Colloids Prepared with a Convenient Patching Method for Generally Treating Heterogeneous Oily Wastewater

Interaction of Carboxyalkylated Cellulose Nanocrystals and Antibiotics

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