Imidazolium-based ionic liquid–assisted processing of natural biopolymers containing amine/amide functionalities for sustainable fiber production

Pal, Sanjay; Mukherjee, Ashmita; Ghosh, Prahlad C.

doi:10.1016/j.mtsust.2021.100082

Cited by 19 publications

(16 citation statements)

References 132 publications

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“… 26 Liang et al extracted melanin from alpaca fibers using ILs. 27 Although extraction of keratin or melanin from natural resources using ILs is documented in the literature, 26 − 29 there is only one report that mentioned simultaneous extraction of keratin and melanin using a hydrated IL to date. 28 This study reports a complex procedure that involves harsh chemicals such as chloroform and methanol in the preprocessing steps of extraction, thus defeating the purpose of the use of green chemistry in the subsequent steps.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Extraction of Bioresources from Human Hair via a Zero-Waste Green Route

et al. 2023

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In recent years, the extraction of bioresources from biowaste via green chemistry and their utilization for the production of materials has gained global momentum due to growing awareness of the concepts of sustainability. Herein, we report a benign process using an ionic liquid (IL), 1-butyl-3-methylimidazolium chloride ([BMIM]Cl), for the simultaneous extraction of keratin and melanin from human hair. Chemical characterization, secondary structure studies, and thermal analysis of the regenerated protein were performed thoroughly. Hemolytic potential assays demonstrated hemocompatibility of the keratin, and thus, it can be used in blood-contacting biomaterials such as sealants, catheters, hemostats, tissue engineering scaffolds, and so on. Scanning electron microscopy showed retention of the ellipsoidal morphology of melanin after the extraction procedure. The pigment demonstrated the ability to reduce 2,2-diphenyl-1-picrylhydrazyl indicative of its free-radical scavenging activity. Notably, the IL could be recovered and recycled from the dialysis remains which also exhibited conductivity and can be potentially used for bioelectronics. Altogether, this work investigates an extraction process of biopolymers using green chemistry from abundantly available biowaste for the production of biomaterials and does not produce any noxious waste matter.

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Section: Introductionmentioning

confidence: 99%

One-Pot Extraction of Bioresources from Human Hair via a Zero-Waste Green Route

et al. 2023

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“…Based on the principles of green chemistry, some ILs are regarded as excellent green solvents. The chief characteristic features of ILs include nonflammability, high electrochemical stability, high solubility in polymers, appreciable chemical stabilities, uniform interfacial ion arrangements, high thermal stabilities, and low toxicities, volatilities, flammabilities, and vapor pressures. − Systematic synthesis using appropriate combinations of anions and cations has resulted in the syntheses of numerous ILs with different solvation powers, densities, conductivities, melting points, viscosities, polarities, acid and base characteristics, and hydrophobicities and hydrophilicities. Because of their polarities, some ILs are immiscible with most organic liquids, which makes them candidates for investigations on the phase transition and self-assembly behaviors of polymers and block copolymers.…”

Section: Introductionmentioning

confidence: 99%

“…Due to their unique properties, a large number of organic electrolytes (commonly referred to as ILs) are now utilized in various scientific and technological fields. Specifically, imidazolium ILs have long alkyl side chains that can segregate to form polar and apolar domains. − …”

Section: Introductionmentioning

confidence: 99%

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Effect of Imidazolium Nitrate Ionic Liquids on Conformational Changes of Poly(N-vinylcaprolactam)

et al. 2022

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Detailed information about molecular interactions and conformational changes of polymeric components in the presence of ionic liquids (ILs) is essential for designing novel polymeric ionic liquid-based biomaterials. In biomaterials science and technology, thermoresponsive polymers (TRPs) are widely viewed as potential candidates for the fabrication of biorelated medical devices. Here, we synthesized thermoresponsive poly(Nvinyl-caprolactam) (PVCL) polymer and investigated the effects of imidazolium-based ILs (1-ethyl-3-methyl imidazolium nitrate and 1-butyl-3-methylimidazolium nitrate) with common anion and different cations on the phase transition behavior of PVCL aqueous solution. The impact of ILs on the phase transition behavior of PVCL was monitored by using UV−visible absorption spectra, steady-state fluorescence spectroscopy, thermal fluorescence spectroscopy, and temperature dependent dynamic light scattering. Results showed significant changes in the absorbance, molecular interactions, agglomeration, and coil to globule transition behaviors of PVCL in the presence of two ILs. PVCL aqueous solution showed significant conformational changes after the addition of ILs.

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“…[24][25][26] Among them, IL based electrochemical sensors and biosensors are increasingly reported owing to their unique characteristics including excellent ionic conductivity, synthetic versatility, good electrochemical stability, less toxicity and tunable physicochemical properties. [27][28][29][30][31][32] Further, even if IL structure comprises some toxic moieties, they can be suitably derivatized to non-toxic forms using their synthetic versatility and can be disposed safely. Incorporation of a redox mediator into the IL matrix would facilitate the electrocatalytic process through their electron transferability, which in turn would amplify the analytical performance of the sensors.…”

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confidence: 99%

Anthraquinone Functionalized Ionic Liquid Based Disposable Electrochemical Sensor for the Enzyme-Free Detection of Hydrogen Peroxide

et al. 2022

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A simple and selective enzyme-free electrochemical sensor for H2O2 has been designed and fabricated using ionic liquid (IL) tagged anthraquinone (AQ) modified electrode (AQ-PF6-IL). This newly synthesized AQ- PF6-IL has been systematically characterized, after which it has been immobilized over a screen-printed electrode to produce AQ-PF6-IL/SPE. The electrochemical investigation of AQ-PF6-IL/SPE displayed a set of distinct redox peaks attributable to the anthraquinone/anthrahydroquinone redox pair. Interestingly, AQ-PF6-IL/SPE has shown enhanced peak current at reduced formal potential for AQ, when compared to AQ/SPE. Further, the electrocatalytic activity of AQ-PF6-IL/SPE towards the reduction of H2O2 was investigated with the sequential addition of H2O2. A rapid and appreciable enhancement in cathodic peak currents was observed and thus demonstrating the excellent electrochemical reduction of H2O2 at the newly developed sensor. Besides, AQ-PF6-IL/SPE established a good linear behaviour over a concentration range of 10-1228 μM with a high sensitivity of 0.281 μA μM-1 cm-2 and low detection limit of 2.87 μM. The fabricated sensor displayed excellent stability, good anti-interference ability, and acceptable reproducibility. The superior properties of the developed sensor could be attributed to the newly designed AQ-PF6-IL, wherein the redox characteristics of AQ mediator are integrated with the high stability and conductivity of IL.

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Imidazolium-based ionic liquid–assisted processing of natural biopolymers containing amine/amide functionalities for sustainable fiber production

Cited by 19 publications

References 132 publications

One-Pot Extraction of Bioresources from Human Hair via a Zero-Waste Green Route

One-Pot Extraction of Bioresources from Human Hair via a Zero-Waste Green Route

Effect of Imidazolium Nitrate Ionic Liquids on Conformational Changes of Poly(N-vinylcaprolactam)

Anthraquinone Functionalized Ionic Liquid Based Disposable Electrochemical Sensor for the Enzyme-Free Detection of Hydrogen Peroxide

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