Reactive dye chemistry plays a crucial role in the dyeing of cotton fibers. Herein, to provide insight on the adaptability of salt-free reactive dyeing for sustainable environmental development, the ...effect of dye chemistry on the dyeing properties of cotton fibers in the proposed ethanol–carbon tetrachloride–water (EtOH–CCl
4
–H
2
O) ternary solvent system was investigated in detail. Twelve commonly used reactive dyes were selected as representative dyes and applied to cotton yarns based on their reactive groups, chromophores, and number of sulfonate groups. Compared with the conventional aqueous dyeing method, the studied copper phthalocyanine (CuPc) dyes and azo dyes showed enhanced dyeing performances in the EtOH–CCl
4
–H
2
O (55:40:5) mixture, except for the investigated anthraquinone dyes. Dyeing results of cotton yarns indicated that the studied CuPc dyes and azo dyes are suitable dye categories for dyeing cotton in the EtOH–CCl
4
–H
2
O mixture. This study may offer a theoretical strategy for the industrial-scale production of cotton fibers using the developed solvent-assisted dyeing technology. The organic solvents recovery will be carried out in the future study.
The coloration of cotton fabric with wild application has attracted extensive attention to cotton fiber, due to the efficient utilization of renewable industrial crops. However, the utilization of ...rapid in-situ synthesis of metal oxides with color is inadequate. Herein, a rapid strategy for constructing multi-color cotton fabric is designed to propose a rapid in-situ synthesis of metal oxides on the surface of cotton fiber in a high-temperature organic solvent system within 40 s. The colored metal oxide of cuprous oxide (Cu2O), tungsten trioxide (WO3), and cobalt molybdate (CoMoO4) are in-situ synthesis on the surface of cotton fibers by different precursor solutions. The bright-colored cotton fabrics are developed within 40 s as well as satisfactory K/S values of 7.53, 2.67, and 0.98, for Cu2O (Cu2O-Cotton), WO3 (WO3-Cotton), and CoMoO4 (CoMoO4-Cotton), respectively. The stable structure of the various colored cotton fabrics is demonstrated by level 3 of rubbing fastness and washing fastness, and acceptable air permeability. Moreover, assigned to the nature of particles, the colored cotton fabrics are fabricated with thermal stability and better ultraviolet protection factors. The rapid in-situ metal oxides with precursor solutions provide a time- and water-saving method to prepare colored cotton fabrics, which exhibits an ideal efficiency, and practical potential application for coloring and functionalization.
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•Cotton fabric is endowed various colors by the intrinsic colors of metal oxides.•Metal oxides are synthesized on fiber surface in high-temperature organic solvent.•Proposed various color is developed within 40 s to achieve time- and water-saving.
Inorganic pigments have received considerable attention due to their color brilliance and thermal stability, which results in beautiful visual effects and desirable specific functions. Herein, we ...demonstrated a strategy for the coloration of cotton fabrics coloring with inorganic pigments using a transient high-temperature coloration method. The uniform color, excellent brilliance, and satisfactory fastness were given to the cotton fabrics after the coloration process. The cotton fabrics could be also colored by a mixture of various inorganic pigments. Meanwhile, the colored cotton fabrics exhibited improved heat conduction compared with the control sample, showing an increase in surface temperature by 2 °C. The heating conduction rate of cotton colored using inorganic pigments was also superior to the raw cotton fabric. Therefore, the proposed transient high-temperature coloration technology using inorganic pigments may be a potential industrialization method to improve coloration and functional properties in cotton applications.
Cotton fibers, a natural cellulose, have played a critical role in the development of wearable energy storage, owning to their wearability, integrability, eco-benignity, and cost effectiveness. ...Graphene, a two-dimensional carbon material, possesses excellent electrochemical properties that can be incorporated into cotton yarns to enhance their performance. However, the conventional chemical reduction processes use corrosive chemical reducing agents that limit their wide application. In the current study, a reduced graphene oxide (rGO)/cotton (RC) yarn supercapacitor was fabricated employing a facile and green hydrothermal approach without the use of any chemical reductants. The reduction efficiency of external GO nanoparticles and the morphology change of internal cotton fiber under different hydrothermal treatments are investigated to explore their effects on the energy storage performance of the resultant RC electrodes and supercapacitors. The RC yarn electrode can reach a capacitance of 13.31 mF cm−1 at of 0.1 mA cm−1. The assembled asymmetric supercapacitor exhibited a high specific capacitance of 2.99 mF cm−1 (9.54 mF cm−2, and 381.43 mF cm−3) at 0.02 mA cm−1 (0.06 mA cm−2 and 2.55 mA cm−3) with a high energy density of 0.42 μWh cm−1 (1.32 μWh cm−2 and 0.05 mWh cm−3) at a power density of 10 μW cm−1 (31.84 μW cm−2 and 1.27 mW cm−3). This work develops a green versatile strategy for fabricating RC supercapacitors, which may provide a new avenue for wearable energy storage devices.
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•The rGO/cotton yarn was fabricated by a hydrothermal method without any reductant.•The GO reduction efficiency and cotton morphology were regulated by the reaction.•The optimal rGO/cotton electrode exhibited a specific capacitance of 13.31 mF cm−1.•Textile-based asymmetric supercapacitor showed excellent electrochemical performance.
The leakage of oil and organic solvents has emerged as the primary factor of water resources contamination and environmental degradation, causing an urgent and desirable quest for widely exploring ...and developing eco-friendly materials with hydrophobicity and lipophilicity. Herein, we presented a biomass-based separator composed of poly(vinyl butyral) (PVB) and natural Juncus effusus (JE) which effectively separated oil-water mixtures, to address the aforementioned issue. The as-prepared PVB/JE-based separator, benefiting from the microporous, inner three-dimensional (3D) structure, and natural wettability of JE fiber, exhibits satisfied oil absorption and separation capabilities. The hydrophobic porous in PVB/JE can effectively block the water within the oil, while providing saturated oil absorption capacity. Furthermore, the separator can also efficient separate water in multiple types of water-in-oil surfactant-stabilized emulsion (separation efficiency > 93%). After repeated use (10 cycles) or continuous filtration (20 min), the separator maintained good separation efficiency ( > 83%) and flux ( > 2000 L m−2 h−1). The PVB/JE-based separator exhibited satisfied potential for the rational utilization of biomass materials and application in oil/water separation, owing to its convenient manufacturing process, high separation efficiency, and eco-friendly raw material.
•Natural Juncus effusus based separator was fabricated for oil/water separation.•Hydrophobicity and oil absorption based on natural property and porous structure.•Surfactants-stabilized emulsion can be effectively separated by reusable separator.
The dopamine modification strategy has received extensive attention in water treatment due to its simple and gentle preparation process, excellent adhesion, and good secondary reactivity. Further ...research has found that compounds containing the catechol groups can react with the amino-containing silane coupling agents under mild conditions to form dopamine-like hydrophilic coatings on the surface of hydrophobic membranes or fibers. This paper used cheap polypropylene melt-blown nonwovens as the substrate to prepare a large-capacity dye adsorbent PP-(CK-Fe). Specifically, catechol (CA) and (3-aminopropyl) triethoxysilane (KH550) were used to form a codeposited coating on the substrate. Then, we used the secondary reactivity of the coating to grow iron-based oxides in situ. The adsorbent had good adsorption performance on anionic dyes at the initial pH of the dye solution, including Orange II (380 mg/g), methyl orange (268 mg/g), Congo red (294 mg/g), and carmine (263 mg/g). However, it had almost no adsorption effect on cationic dyes at the initial pH, including methylene blue and Rhodamine B. We chose Orange II to explore the possible adsorption mechanism. The results confirmed that the adsorbent had good adsorption performance at pH 3–11. The adsorption process tended to be monolayer chemical adsorption. The maximum adsorption capacity (Q max) of Orange II was 515.46 mg/g under optimal conditions. This study also confirmed that the codeposition coating constructed with polyphenol and amino-containing silane coupling agents had a secondary reactivity similar to the dopamine coating.
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•JE fiber with a 3D network was used to prepare the magnetic JE (M-JE) fabric.•M-JE fabric generate electricity through electromagnetic induction.•M-JE fabric can achieve electrical ...output of about 2 V and 3 mA.•M-JE fabric can power small electronic devices by converting mechanical energy.
Mechanical energy produced by human motion is ubiquitous, continuous, and usually not utilized, making it an attractive target for sustainable electricity-harvesting applications. In this study, flexible magnetic Juncus effusus (M-JE) fibers were prepared from plant-extracted three-dimensional porous Juncus effusus (JE) fibers decorated with polyurethane and magnetic particles. The M-JE fibers were woven into fabrics and used for mechanical energy harvesting through electromagnetic induction. The M-JE fabric and induction coil, attached to the human wrist and waist, yielded continuous and stable voltage (2 V) and current (3 mA) during swinging. The proposed M-JE fabric energy harvester exhibited good energy harvesting potential and was capable of quickly charging commercial capacitors to power small electronic devices. The proposed M-JE fabric exhibited good mechanical energy harvesting performance, paving the way for the use of natural plant fibers in energy-harvesting fabrics.
As the commercially filter material used in a face mask, polypropylene (PP) non-woven fabric is considerably important for personal and medical protection, which plays an essential role in reducing ...exposure to infectious respiratory bacteria and airborne aerosol particles. Herein, a facial and rapid strategy for in situ synthesis of cuprous oxide nanoparticles (Cu2O NPs) on PP nonwovens with the durable antibacterial property was demonstrated using high-temperature polydimethylsiloxane based on the concept of material engineering. Owing to the instantaneously slight melting of the PP surface layer at high temperature, Cu2O NPs were rapidly in situ constructed and immobilized on the fiber surface to form an organic and inorganic hybrid layer. The as-prepared Cu2O-PP non-woven fabric exhibited excellent broad-spectrum antibacterial properties towards both the Gram-positive and Gram-negative bacteria, showing an inhibition zone of 39 mm and 18 mm for B. subtilis and P. aeruginosa, respectively. Furthermore, a durable antibacterial property was also achieved after 50 times of standard washing. Finally, the as-prepared Cu2O-PP non-woven fabric was used as an insert filter to fabricate a four-layer PP-based face mask, which may significantly improve the antibacterial performance of masks. The method provides a facile engineering strategy for medical protection with great application potential.
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•A novel strategy for rapid synthesis of Cu2O NPs on PP fabric was proposed.•Cu2O NPs were constructed on slight melting surface layer of PP fiber within 50s.•Cu2O-PP exhibited durable antibacterial properties in protection applications.
Ethanol (EtOH)-water (H
2
O) mixture, as an environmentally friendly organic solvent, has been widely used in green textile dyeing technologies to reduce water consumption. However, it is essential ...to develop a sustainable and energy-saving approach for the recovery of the EtOH-H
2
O mixture to mitigate the global energy crisis. Herein, inspired by the transpiration process of a tree, we designed a bilayer structured solar energy-driven recovery device composed of a solar absorption layer and a liquid transport layer using the lignocellulosic biomass
Juncus effusus
(JE) and carbon nanotubes (CNTs). Benefiting from the structural design and distinct properties of the 3D hierarchically porous JE fibres, the as-prepared device exhibited an excellent light absorbability (>95.90%) and photothermal conversion capability, and was further used to purify the dye-contaminated EtOH-H
2
O mixture by steam generation from solar energy. By using this stable recovery device, the evaporation rate towards the EtOH-H
2
O mixture was up to 2.43 kg m
−2
h
−1
under one-sun illumination, which is approximately 3.6 times that of natural evaporation. Furthermore, we fabricated a large-scale steam evaporator with a total area of 900 cm
2
for the recovery of the EtOH-H
2
O mixture, which was placed in an outdoor environment for one whole day (0:00-24:00) to evaluate the real-world evaporation and recovery performance. The EtOH content of the collected mixture remained almost invariable after evaporation, showing great potential in industrial production. The lignocellulosic JE-based evaporation device may be a promising solar energy-driven system for the highly efficient recovery of the EtOH-H
2
O mixture.
A highly efficient and stable solar energy-driven device was fabricated using lignocellulosic biomass
Juncus effusus
for the recovery of ethanol-water mixture.
