Effects of PEG loading on electromechanical behavior of cellulose-based electroactive composite

Özdemir, Okan; Karakuzu, Ramazan; Sarıkanat, Mehmet; Akar, Emine; Seki, Yoldaş; Çetín, Levent; Salmani, Ibrahim; Gürses, Barış Oğuz; Yılmaz, Özgün Cem; Sever, Kutlay; Mermer, Ömer

doi:10.1007/s10570-015-0581-7

Cited by 16 publications

(9 citation statements)

References 34 publications

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“…00‐004‐0784). The reduction in crystallinity upon PSS functionalisation could be indicated based on the diffraction peak intensity reduction, which was similar to observations by Ozdemir et al (2015) [20]. From the FTIR spectra (Fig.…”

Section: Resultssupporting

confidence: 87%

Effect of negative functionalisation of gold nanorods on conformation and activity of human serum albumin

Alex

Chandrasekaran

Mukherjee

2019

IET nanobiotechnol.

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The theranostic applications of gold nanorods (AuNRs) are limited due to the presence of cytotoxic cetrimonium bromide (CTAB) stabiliser, leading to the instigation of alternate stabilisers like negatively charged polystyrene sulphonate (PSS). Despite previous reports suggesting the impact of PSS-AuNRs on cells, their effect on the most abundant protein in plasma, i.e. human serum albumin (HSA), has not been studied before. Hence, the impact of PSS-AuNRs on HSA was thoroughly examined using varied spectroscopic techniques. The absorbance and fluorescence spectroscopic findings suggested the extent of ground-state complexation and tryptophan domain disruptions of HSA for different AuNR concentrations, which were also suggested based on size measurements and activation energy calculations for complex formation. Modifications in the hydrophobic environment of HSA were evaluated using synchronous fluorescence, whereas the secondary structural damages were explained using circular dichroism (CD) and FTIR analyses. Additional studies to analyse protein denaturation, fibrillation, esterase activity, and free thiol were carried out to understand structural and functional changes. The study suggested that PSS-AuNRs showed concentration-dependent alterations in HSA structure, but the extent of protein toxicity was considerably lesser for PSS-AuNRs of similar dimensions compared to the data available for CTAB-AuNRs; thus, highlighting that PSS-AuNRs could be safer for biomedical applications.

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Section: Resultssupporting

confidence: 87%

Effect of negative functionalisation of gold nanorods on conformation and activity of human serum albumin

Alex

Chandrasekaran

Mukherjee

2019

IET nanobiotechnol.

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“…As one type of smart materials, the electroactive polymer (EAP) can generate deformation and deflection displacement under an electric field, or generate a response charge under stress [1]. These properties widen the potential application of EAP materials in actuators [2][3][4], Micro Electro Mechanical Systems devices [5,6], and biomimetic robots [7][8][9]. According to its actuation mechanism, electroactive polymer can be divided into two categories, i.e., ionic EAP materials related to ion migration and diffusion mechanism, and electronic EAP materials related to electric field driven and Coulomb force, respectively [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Study on the Preparation of Ionic Liquid Doped Chitosan/Cellulose-Based Electroactive Composites

Wang

Xie

Qian

et al. 2019

IJMS

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Electro-actuated polymer (EAP) can change its shape or volume under the action of an external electric field and shows similar behavioral characteristics with those of biological muscles, and so it has good application prospects in aerospace, bionic robots, and other fields. The properties of cellulose-based electroactive materials are similar to ionic EAP materials, although they have higher Young’s modulus and lower energy consumption. However, cellulose-based electroactive materials have a more obvious deficiency—their actuation performance is often more significantly affected by ambient humidity due to the hygroscopicity caused by the strong hydrophilic structure of cellulose itself. Compared with cellulose, chitosan has good film-forming and water retention properties, and its compatibility with cellulose is very excellent. In this study, a chitosan/cellulose composite film doped with ionic liquid, 1-ethyl-3-methylimidazolium acetate ([EMIM]Ac), was prepared by co-dissolution and regeneration process using [EMIM]Ac as the solvent. After that, a conductive polymer, poly(3,4-ethylenedioxythiophene)/poly (styrene sulfonate) (PEDOT: PSS), was deposited on the surface of the resulted composite, and then a kind of cellulose-based electroactive composites were obtained. The results showed that the end bending deformation amplitude of the resulted material was increased by 2.3 times higher than that of the pure cellulose film under the same conditions, and the maximum deformation amplitude reached 7.3 mm. The tensile strength of the chitosan/cellulose composite film was 53.68% higher than that of the cellulose film, and the Young’s modulus was increased by 72.52%. Furthermore, in comparison with the pure cellulose film, the water retention of the composite film increased and the water absorption rate decreased obviously, which meant that the resistance of the material to changes in environmental humidity was greatly improved.

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“…It may be assumed that without the carbon particles, the intense charge density of the ionic liquids together with the loss of hydrogen‐bonded structure leads to certain alterations in the pyranose conformations, leading to the reduction of the absorption band. Certain bands representing the imidazole ring of EMIMCl appear in cell‐regenerated, Cell‐ACA and cell‐CDC, namely the 3147 cm −1 band that describes the CH stretching vibration, the 1564 cm −1 band that represents the amide II bond, 48 and the 752 cm −1 band that belongs to out of plane bending of CH groups 49 …”

Section: Resultsmentioning

confidence: 99%

Dual function composite fibers of cellulose with activated carbon aerogel and carbide derived carbon

Elhi

Puust

Peikolainen

et al. 2022

J of Applied Polymer Sci

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Polymers of natural origin, especially cellulose, have risen to the focus of smart materials, and also energy storage materials' research as sustainable matrix alternatives. In this work, novel composites of cellulose with activated carbon aerogel (ACA) and carbide-derived carbon (CDC) are demonstrated. The composites were formulated as fibers from regenerated cellulose (Cell). The electromechanical response as linear actuation in stress and strain of the fibers was studied in an organic electrolyte at low applied potentials in range of 0.55 to À0.8 V. Cyclic voltammetry and square wave potential steps were performed revealing for both composite fibers expansion at positive charging. The Cell-ACA fibers showed a stronger response compared with Cell-CDC, largely due to the particle structure, reflected in higher electronic conductivity. The chronopotentiometric measurements showed that Cell-ACA also had the higher specific capacitance of the two of 47.5 F g À1 . The dual-function of Cell-ACA and Cell-CDC of electromechanical activity and energy storage capability can have potential in smart clothing applications.

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Effects of PEG loading on electromechanical behavior of cellulose-based electroactive composite

Cited by 16 publications

References 34 publications

Effect of negative functionalisation of gold nanorods on conformation and activity of human serum albumin

Effect of negative functionalisation of gold nanorods on conformation and activity of human serum albumin

Study on the Preparation of Ionic Liquid Doped Chitosan/Cellulose-Based Electroactive Composites

Dual function composite fibers of cellulose with activated carbon aerogel and carbide derived carbon

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