Cellulose Acetate Fibers Research Articles

All-cellulose composite membranes for oil microdroplet collection

Oil spills on ocean waters represent a major threat to marine ecosystems. A significant part of the spilled oil is dispersed in microdroplets that are not recovered by traditional oil-removing methods. In this work, we report on the manufacture of cellulose acetate (CA) electrospun non-woven membranes, stamped with different cellulose nanocrystal (CNC) patterns. We demonstrate the use of the membranes produced as selective oil microdroplets removal from water emulsions with an efficiency up to 80%. Screenprinting was used to imprint different CNC designs on the CA surface membranes. To promote the adhesion between the CNCs and the CNCs with the CA fibers the membrane was subjected to a thermal and chemical treatments. Oil droplets were collected under water in the oleophilic CNC pattern while the water could flow through the hydrophilic CA electrospun non-woven membrane. The application of a non-woven all cellulosic composite membrane for separation of a water/oil suspension is presented. The under-water wetting behavior, of annealed cellulose nanocrystals, for oil is studied. Special consideration is given to the capability for the collection of oil micro droplets in aqueous suspension and the influence of the geometrical pattern of the cellulose nanoparticles layer in oil recovery efficiency.

Electrospun Fibrous Mat of Cellulose Acetate: Influence of Solvent System (Acetic Acid/Acetone) on Fibers Morphology

Objectives: Electrospun Cellulose Acetate (CA) fibers system are of high demand due to its desired properties associated with the final fiber features. This polymer inability to dissolve may hinder its electrospinningprocessing. The goal of the current study is to explore the fiber forming ability of solvent mixture of varying ratios of acetone and acetic acid and to derive the optimized formulation that facilitate the continuous and uniform CA fiber formation. Methods: In this study, a new solvent system for electrospinning of cellulose acetate is developed for the preparation of continuous uniform CA fibers. Different concentrations of cellulose acetate are dissolved in solvent system consisting of acetic acid/acetone mixture. The polymer solution prepared was hosted in a mechanical syringe pump, with a stainless-steel blunt end needle fixated to the tip acting as the spraying nozzle. The polymeric cellulose acetate in acetone/acetic acid mixture was examined for its viscosity and electrical conductance. Moreover, the formed cellulose acetate-based fibers were morphologically examined. Results: The solvent system composition as well as the cellulose acetateconcentration affected the final CA fiber morphology, where the 10% cellulose acetate solution in acetone: acetic acid at 9:1 ratio presented uniform fiber morphology with a diameter of 549±45 nm. The solvent systemoptimized preserved continuous and uniform, beads-free CA fibers. Conclusion: In the current study, the different solvent systems studied presented different fiber morphologies and diameter sizes thus preservingthe importance of the solvent system for the cellulose acetate fine fiber production.

Possible Recycling of Cigarette Butts as Fiber Modifier in Bitumen for Asphalt Concrete.

Littering waste is among the top environmental issues in the world, and the management of the waste has turned into a challenge in almost every city. It has been reported that 75% of smokers dispose of their cigarette butts (CBs) on the ground, even in public places. Researchers have discovered that CBs make up more than one-third of the total littered waste on the planet. Cigarette butts predominantly consist of a cellulose acetate fiber (plastic)-based filter wrapped in paper. Waste CBs contain burnt tobacco and tar, along with many other toxic chemicals. They take years to biodegrade depending on the environmental conditions, and toxic chemicals leach out and contaminate the environment. As part of an ongoing project, this paper presents a novel and sustainable technique to recycle cigarette butts in bitumen for the construction of flexible pavements. In this research, CBs have been pre-processed and mixed with bitumen classes C320, C170, and PMB A10E as a fiber modifier. Comprehensive laboratory investigations, including a penetration test, softening point test, and viscosity test, have been performed along with a binder drain off test to evaluate the performance of the modified samples. During this investigation, samples were prepared with 0.3% cellulose fiber, 0.2%, 0.3% 0.4%, and 0.5% CBs. The results of the CB-modified samples were compared with the sample with cellulose fiber and fresh bitumen (0% fiber). The results show that the physical and rheological properties of bitumen incorporating CBs improve significantly, and CBs could be used instead of virgin cellulose fiber as a fiber modifier.

Cellulose Acetate Nanofibrous Membranes for Antibacterial Applications.

N-halamine antibacterial materials have been extensively explored over the past few decades due to their fast inactivation of a broad spectrum of bacterial and rechargeability. Electrospun nanofibers loaded with N-halamines have gained great attention because of their enhanced antibacterial capability induced by the larger specific surface area. The patents on electrospun nanofibers (US20080679694), (CN2015207182871) helped in the method for the preparation of nanofibers. In this study, a novel N-halamine precursor, 3-(3'-Chloro-propyl)-5,5-dimethylimidazolidine- 2,4-dione(CPDMH), was synthesized. Antimicrobial electrospun Cellulose Acetate (CA) nanofibers were fabricated through impregnating CPDMH as an antimicrobial agent into CA fibers by the bubble electrospinning. The surface morphologies of CA/CPDMH nanofibrous membranes were characterized by Scanning Electron Microscope (SEM). The chlorinated fibrous membranes (CA/CPDMH-Cl) exhibited effective antimicrobial activity against 100% of S. aureus and E. coli O157:H7 within 1 min and 5 min, respectively. The CA/CPDMH-Cl nanofibrous membranes showed good storage stability under the dark and excellent durability towards UVA light exposure. Meanwhile, the release of active chlorine from the chlorinated nanofibrous membranes was stable and safe. Besides, the addition of CPDMH could improve the mechanical property, and chlorination did not obviously affect the strength and elongation of the nanofibrous membranes. CPDMH could endow the electrospun CA nanofibers with powerful, durable and regenerable antimicrobial properties. It will provide a continuous and effective method for health-care relative industrial application.

Electrospun thymol-loaded porous cellulose acetate fibers with potential biomedical applications.

Drug toxicity induced by burst release has become a great challenge in clinical therapeutics. In most studies of drug delivery, great attention has been given to achieving sustained drug release by enhancing the surface hydrophobicity of drug carriers. However, many of them improved surface hydrophobicity through chemical methods, which could be toxic and time-consuming. This paper aims at providing a facile way to improve surface hydrophobicity of drug carriers. Here, a kind of porous cellulose acetate (CA) fibrous membranes containing different amount of thymol (THY) for sustained drug release were prepared, by co-electrospinning technique. The ellipse-shaped nanopores were generated on the surfaces of electrospun fibers in situ, which trapped a part of air at the interface and thus enhanced the hydrophobicity of fibrous membranes. The in vitro drug release results showed that the porous THY-loaded fibrous membranes had slower initial drug release and extended drug release time, compared with nonporous THY-loaded fibrous membranes. In addition, the higher specific surface area of porous THY-loaded CA fibrous membranes contributed to a higher drug utilization ratio. Antibacterial results demonstrated that porous THY-loaded CA fibrous membranes possessed more effective inhibition against S. aureus and E. coli, with only 0.07% and 0.09% of bacterial survival rate, respectively. Furthermore, the combination of porous surface structure with a controllable drug release improved the proliferation of L929 cells, indicating a better cytocompatibility. Taken together, the porous THY-loaded CA fibrous membrane offer significant promise as novel wound healing materials.

Novel antibacterial cellulose acetate fibers modified with 2-fluoropyridine complexes

The complexes represented with the general formula [ML2Cl2] (L: 2-fluoropyridine; M: Ni (II), Cu (II), Co (II)) were synthesized and their structures were characterized via FT-IR and 1H NMR techniques. Thermal properties of the complexes were also investigated via TG/DTA combined system under N2 atmosphere. The complexes containing cellulose acetate (CA) micro/nano-fibers, which is a biocompatible and biodegradable polymer, were obtained via electrospinning technique. The fibers were characterized via FT-IR spectroscopy. FE-SEM images of the fibers were used to investigate their morphologies and for to determine the diameters of the fibers. Thermal properties of the fibers were investigated via TG/DTA combined system. Antibacterial studies of the complexes and fibers were investigated against the bacteria strains E. coli and Methyciline Resistant Staphylocaucus aureus via disc diffusion, broth microdilution and JIS L 1902: 2008, Testing method for antibacterial activity of textiles. Different levels Antibacterial activity was observed for all complexes and fibers.

Effect of processing parameters on the electrospinning of cellulose acetate studied by response surface methodology

Cellulose acetate (CA) is the acetate ester of cellulose produced from cellulose via the process of acetylation. Currently, electrospinning has become a widely used technique to produce CA nanofibers for potential applications such as filtration, medical dressings, and food packaging. Being biodegradable and biocompatible, CA nanofibers bring additional advantages for these applications, e.g., high surface area, high porosity, and light weight. The quality of the CA nanofibers, which can be characterized by the prevalence of fiber defects, pore size, and fiber diameter, directly affects their performance. Fiber quality is, in turn, directly determined by the electrospinning process parameters. Therefore, in this project, we aimed to investigate the effect of electrospinning parameters, including CA concentration, voltage, and spinning distance, on the electrospinnability of CA nanofibers and fiber diameter, using process optimization principles and response surface methodology. Certain process parameters, including solvent (acetone), needle diameter (gauge 22, inner diameter 0.413 mm), temperature (20 °C), and feed rate (2 mL/h), were kept constant throughout the experiment. Preliminary experiments were conducted to determine the extreme conditions of each parameter and to define a working boundary. Then, trials of electrospinning CA nanofibers were conducted following a 3-factor, 3-level Box-Behnken design within the predetermined range. CA nanofibers morphology was characterized by scanning electron microscope (SEM) and ImageJ software to obtain their mean diameter. The mean electrospun fiber diameters fell into the range from 404 to 1346 nm and increased with increasing CA concentration. The fiber diameter was impacted less significantly by the other two parameters, i.e., voltage and spinning distance.

Manufacture of cellulose acetate membranes and chitosan nanoparticles for the retention of mercury in water

In Colombia, an average of 75 tons of mercury is released annually due to the illegal mining activity of gold, causing natural water sources to be contaminated in regions that collect water through rivers and streams, generating mercury poisoning. Nanochitosan, a biopolymer synthesized at the nanoscale, has shown its ability to retain different heavy metals in wastewater due to its greater availability of amino groups at its surface. In this work, a set of preliminary parameters were identified and established for the development of cellulose acetate membranes with chitosan nanoparticles for mercury retention. Nanoparticles were synthesized by ionic gelation, varying the addition rate of sodium tripolyphosphate. The membranes were prepared by solvent exchange, varying the concentration of polyethylene glycol, the pore-forming agent. Finally, the samples were characterized by scanning electron microscopy and dynamic light scattering. The results showed that there is a proportional relationship between the rate of addition and the size of the particles obtained, while, for the membranes, 11% polyethylene glycol produced a porous network with cellulose acetate fibers inside the pores.

Wet-spinning of Cellulose Acetate Reinforced with Acetylated Nano-crystalline Cellulose as Carbon Fibre Precursors

The search precursors that are bio-based, renewable and biodegradable has attracted significant attention due to increased environmental awareness. Recently, nano-crystalline cellulose (NCC) has been considered as a potential precursor to produce carbon fibre owing to its high crystallinity and excellent mechanical properties. However, its crystallinity prevents it from being dissolved in comment solvents. The main aims of this study were: (i) to acetylate NCC to improve its compatibility with cellulose acetate and (ii) to produce wet-spun cellulose acetate fibres reinforced acetylated and unacetylated NCC. In this study, rod-like particles of NCC with diameters in the range 2.0-4.8 nm and lengths of 46-114 nm were characterised using a Transmission Electron Microscope (TEM). The carbonyl (C=O) group of the acetyl group was confirmed using Fourier Transmission Infrared (FTIR), and the crystallinity of NCC was characterised using X-Ray Diffraction (XRD). The crystallinity indicates of the NCC before and after acetylation were 78% and 68% respectively. The morphology of wet-spun cellulose acetate reinforced acetylated NCC was smoother than reinforced NCC. The acetylation on NCC increased its compatibility with the polymer matrix.

UV random laser emission from flexible ZnO-Ag-enriched electrospun cellulose acetate fiber matrix

We report an alternative random laser (RL) architecture based on a flexible and ZnO-enriched cellulose acetate (CA) fiber matrix prepared by electrospinning. The electrospun fibers, mechanically reinforced by polyethylene oxide and impregnated with zinc oxide powder, were applied as an adsorbent surface to incorporate plasmonic centers (silver nanoprisms). The resulting structures – prepared in the absence (CA-ZnO) and in the presence of silver nanoparticles (CA-ZnO-Ag) - were developed to support light excitation, guiding and scattering prototypes of a RL. Both materials were excited by a pulsed (5 Hz, 5 ns) source at 355 nm and their fluorescence emission monitored at 387 nm. The results suggest that the addition of silver nanoprisms to the ZnO- enriched fiber matrix allows large improvement of the RL performance due to the plasmon resonance of the silver nanoprisms, with ~80% reduction in threshold energy. Besides the intensity and spectral analysis, the RL characterization included its spectral and intensity angular dependences. Bending the flexible RL did not affect the spectral characteristics of the device. No degradation was observed in the random laser emission for more than 10,000 shots of the pump laser.

TiO2-Doped Chitosan Microspheres Supported on Cellulose Acetate Fibers for Adsorption and Photocatalytic Degradation of Methyl Orange.

Chitosan/cellulose acetate (CS/CA) used as a biopolymer systema, with the addition of TiO2 as photocatalyst (C-T/CA) were fabricated by alternating electrospinning/electrospraying technology. The uniform dispersion of TiO2 and its recovery after the removal of methyl orange (MO) was achieved by incorporating TiO2 in CS electrosprayed hemispheres. The effects of pH values, contact time, and the amount of TiO2 on adsorption and photocatalytic degradation for MO of the C-T/CA were investigated in detail. When TiO2 content was 3 wt %, the highest MO removal amount for fiber membranes (C-T-3/CA) reached 98% at pH value 4 and MO concentration of 40 mg/L. According to the data analysis, the pseudo-second-order kinetic and Freundlich isotherm model were well fitted to kinetic and equilibrium data of MO removal. Especially for C-T-3/CA, the fiber membrane exhibited multiple layers of adsorption. All these results indicated that adsorption caused by electrostatic interaction and photocatalytic degradation were involved in the MO removal process. This work provides a potential method for developing a novel photocatalyst with excellent catalytic activity, adsorbing capability and recycling use.

Hydrophilic and Insoluble Electrospun Cellulose Acetate Fiber-Based Biosensing Platform for 25-Hydroxy Vitamin-D3 Detection

The present work describes the fabrication of a simple, low-cost, eco-friendly, and disposable conducting paper substrate (RCP) decorated with electrospun cellulose acetate fibers (CAEFs) for biosensor application. CAEFs were electrospun under spinning conditions at a voltage of 16 kV, flow rate of 0.2 mL h–1, and tip-to-collector distance of 15 cm. CAEFs were directly collected onto RCP. A scanning electron microscopy study revealed the diameter of CAEFs in the range of 330 ± 3.50 nm. The contact angle of CAEFs was found to be 38.07 ± 5.10°, which indicates a hydrophilic nature of the fibers. Further, the CAEF/RCP electrode was modified with antibody specific to 25-hydroxy vitamin-D3 (AB-25OHD3), followed with bovine serum albumin (BSA) to block nonspecific binding sites for detection of 25-OH vitamin-D3. The BSA/AB-25OHD3/CAEF/RCP immunoelectrode fabrication was confirmed thorough scanning electron microscopy, Fourier transform infrared spectroscopy, contact angle and electrochemical techniques. The chr...

Understanding solubility, spinnability and electrospinning behaviour of cellulose acetate using different solvent systems

The purpose of this study is to understand the solubility and spinnability of cellulose acetate (CA) and its electrospinning behaviour in different solvents. As the process of electrospinning and the corresponding fibre properties are primarily governed by the solvents used, a systematic study of the selection of solvent systems using the solubility parameters of Hildebrand and Hansen along with a Teas chart for a particular polymer is essential for the better optimization of the process. It appeared from the Teas chart that higher dispersion force \((f_{\mathrm{d}})\) and lower hydrogen bonding force \((f_{\mathrm{h}})\) are convenient for both the solubility and spinnability of CA in single solvent of acetone and binary solvent of 2:1 acetone/N,N-dimethylacetamide (DMAc). The viscosity of the solutions escalated with increasing concentration of CA due to polymer chain entanglement which in turn favoured fibre formation. Among the solvent systems used in this work, field emission scanning electron microscopy arrayed the electrospun CA fibres using pure acetone as a solvent produced both cylindrical- and ribbon-shaped fibres of a diameter of 1 \(\upmu \)m, whereas CA in 2:1 acetone/DMAc yielded smooth bead-free cylindrical fibres of diameter in the range of 250–350 nm and CA in 3:1 acetic acid/water formed fibres with beads. Rheological analysis showed that fibre formation improved with increasing viscosity of CA solution. Electrical conductivity measurement of the CA solutions depicted that with an increase in CA concentration, fibre diameters were increased, whereas the conductivity decreased. Also, attenuated total reflectance–Fourier transform infrared spectroscopy confirmed the major peaks of CA for all the electrospun samples.

Cellulose triacetate fiber-reinforced polystyrene composite

The increase in demand for natural fibers in development of the composites has grown rapidly due to the cost-effectiveness, low density, biodegradability, and renewability. The lack of appropriate interfacial bonding between the cellulose fibers and the thermoplastic matrix is one of the disadvantages faced during their application. Also, the properties of composite made of thermoplastic polystyrene (PS) and cellulose acetate fibers are not compatible due to the poor wettability and interfacial adhesion. In the study presented, PS reinforced with cellulose triacetate is being prepared by melt blending in a twin-screw extruder with the induction of fusabond (FB). The influence of the cellulose acetate and FB content on PS composite is being investigated using thermogravimetric analysis, tensile test, dynamic mechanical analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The addition of FB enhances interfacial adhesion demonstrated by the improvement in storage modulus, reduction in damping peak value, and the increase in thermal stability of the composite. The inclusion of FB not only increases the % elongation but also improves the impact strength of the cellulose triacetate-reinforced PS composite under dynamic loading. Moreover, the interaction between PS with cellulose triacetate fiber is indicated by the results of X-ray photospectroscopy and fracture surface morphology. The results show that the addition of FB is suitable for use in cellulose fiber-reinforced PS composite for packaging, automotive, and biomedical applications.

Characterization of cellulose acetate/gum Arabic fibers loaded with extract of Viburnum opulus L. fruit

Fruits of Viburnum opulus L. (also called European cranberry) are well known for their high antioxidant activity. In this work, novel encapsulation matrices were fabricated by electrospinning of cellulose acetate (CA) and gum Arabic (GA) blends in different compositions and their performance for encapsulation of Viburnum opulus L. fruit extract was evaluated. Scanning electron microscopy (SEM) results showed that CA-GA hybrid fibers were bead-free and smooth, exhibiting diameters ranging from 527 to 670 nm and 544–870 nm for unloaded and loaded fibers, respectively. Encapsulation efficiency of the extract was between 83 and 87%. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assay exhibited that after 14 days of storage at 4 °C and 25 °C, antioxidant activity (%) of free extract was found to be 40% and 34%, respectively. Antioxidant activities of extract loaded fibers were significantly higher ranging from 56% to 59% and 55%–58% at 4 °C and 25 °C, respectively. In-vitro release study showed that 43% of the extract in neat CA fibers was released into buffer medium within 54 h, while considerably higher values (54%–62%) were obtained for GA incorporated fibers. The release of the extract from electrospun fibers can be effectively controlled by blending CA with GA at different ratios.

Direct Electrospinning of Cellulose Acetate onto Polyurethane Sheet and Effect of Its Saponification on Mechanical Properties

This article reports on direct electrospinning of water-soluble cellulose acetate (WSCA) and cellulose diacetate (CDA) onto a non-conductive synthetic polymer sheet such as polyurethane (PU) sheet to modify its surface morphology. The direct electrospinning was successfully performed after spraying an anti-static agent on the PU sheet. Furthermore, tight fixation of the fibers was achieved by spraying a dimethylformamide/ethanol (1/1) solution during the spinning. Finally, the cellulose acetate fibers on the PU sheet were converted to regenerated cellulose fibers by saponification. Changes in surface morphology were evaluated via tribology tests. The friction coefficient of the PU sheet significantly decreased with increases in the amount of deposited fiber, thereby suggesting that the PU sheet surface became smoother. After saponification, the friction coefficients of the sheets slightly increased, with the exception of the PU sheet with the increased amount of saponified WSCA fibers, and this was potentially attributed to changes in the elasticity upon saponification.

Kinetic Analysis of Cellulose Acetate/Cellulose II Hybrid Fiber Formation by Alkaline Hydrolysis

Cellulose acetate (CA) can be converted to cellulose II through a deacetylation process using ethanolic NaOH solution. Infrared spectroscopy was used to observe the degree of acetylation by comparing the absorption intensities of C═O and C–O stretches. Attenuated total reflection-Fourier transform infrared (ATR-FTIR) analysis, which only measures a few microns into the fiber diameter, was compared with FTIR, which measures the whole fiber cross-section. Steady deacetylation of the whole fiber over 180 min was observed with FTIR to eventual complete deacetylation. In comparison, ATR-FTIR shows deacetylation occurring more rapidly to complete deacetylation after 90 min, indicating rapid deacetylation of the CA fiber periphery. Data were fitted to a pseudo-second order kinetic model, with high correlation (R² > 0.99), and it was observed that the deacetylation rate (k₂) observed with ATR-FTIR (−0.634 min⁻¹) was twice as rapid as the deacetylation rate observed with FTIR (−0.315 min⁻¹). IR observations were in agreement with the analysis of fiber cross-sections by confocal microscopy, where it was observed that changes in fiber morphology occurred with treatment time and progressive hydrolysis of cellulose acetate to cellulose II. A differential fiber chemical composition was created within the CA fiber cross-section; after 5 min, the outer regions of the fiber cross-section are hydrolyzed to cellulose II and this hydrolysis increases heterogeneously with time to complete hydrolysis after 180 min and conversion to cellulose II. These results indicate the potential to produce fibers with a differential periphery/core structure, which can be accurately designed according to the relative degrees of cellulose II/CA required for specific applications by varying the treatment time in application of this model.

Vibration of an axially moving jet in a dry spinning process

During the dry spinning process for fabrication of cellulose acetate fibers, the moving jet is approximated as a string, and its vibration equation is established. The vibration frequency affects g...

Gallic acid‐loaded electrospun cellulose acetate nanofibers as potential wound dressing materials

Gallic acid (GA)–loaded cellulose acetate (CA) nanofiber mats with 10 to 40 wt.% GA contents (based on the weight of CA) were fabricated by electrospinning. The effects of GA contents and applied potential on the morphology and the average diameters of fibers were studied. The electrospun fiber mats containing 20 and 40 wt.% GA were investigated for their potential use as carrier of GA in wound dressing application. The GA‐loaded CA films were prepared by solvent casting technique for use in comparative studies. Determination of the release characteristics of GA from the GA‐loaded fiber mats and films was carried out by the total immersion and the transdermal diffusion through a pig skin method in acetate buffer solution (pH 5.5) or normal saline (pH 7.0) at either 32 or 37°C, respectively. In the total immersion method, the maximum amounts of the GA released from the fiber mats containing 20 and 40 wt.% GA in the acetate buffer were approximately 97% and 71% (based on the weight of initial GA), while those of the GA released into the normal saline were approximately 96% and 81%, respectively. Lower values were observed in the experiments of the transdermal diffusion through a pig skin method. The corresponding GA‐loaded CA films showed the lower amounts of GA released into media. The as‐loaded and the as‐released GA remained its antioxidant activity as investigated by 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) assay. Lastly, the GA‐loaded CA fiber mats exhibited antibacterial activity against Staphylococcus aureus, which showed the potential for use as wound dressing materials.

Synthesis of N-Doped Porous Carbon Materials Derived from Waste Cellulose Acetate Fiber via Urea Activation and Its Potential Application in Supercapacitors

The N-doped porous carbon materials were prepared via the co-carbonization of cellulose acetate fiber and urea. The cellulose acetate fiber was derived from waste cigarette and urea was used as the nitrogen source and the activating agent. The carbonization temperature has an important effect on the specific surface area, porosity and nitrogen content of as-prepared porous carbon materials. When the carbonization temperature was 750°C, as-prepared CN-750 with an average pore size of 4.84 nm exhibited the highest specific surface area of 734 m2·g−1. The sample of CN-600 synthesized at 600°C showed the highest nitrogen content of 11.69 at%. Moreover, as-prepared samples with disordered pores showed a low graphitization degree and a large interlayer space. The specific capacitance of CN-750 is 152 F·g−1 at the current density of 1 A·g−1, which is higher than that of CN-600 and CN-900. After 5000 cycles, the capacitance retention of CN-600, CN-750 and CN-900 is 91.9%, 93.1% and 95.1%, respectively. The energy density of CN-750 is 5.28 Wh·kg−1 at the power density of 250.1 W·kg−1 and it retains 6.09 Wh·kg−1 at the power density of 24.97 W·kg−1. Our study indicates that the waste cigarette butts can be effectively recycled via the co-carbonization method, and as-prepared N-doped porous carbon materials with an excellent cycling stability and a reasonable availability are promising candidates for the electrode materials of supercapacitors.