JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaoyu Cheng,Huixiang Wang,Shaowei Wang,Yue Jiao,Chenyu Sang,Shaohua Jiang,Shuijian He,Changtong Mei,Xinwu Xu,Huining Xiao,Jingquan Han
The flexible and self-healing supercapacitors (SCs) are considered to be promising smart energy storage devices. Nevertheless, the SCs integrated with flexibility, lightweight, pattern editability, self-healing capabilities and desirable electrochemical properties remain a challenge. Herein, an all-in-one self-healing SC fabricated with the free-standing hybrid film (TCMP) composed of the 2,2,6,6-tetramethylpiperidin-1-yloxy-oxidized cellulose nanofibers (TOCNs) carried carbon nanotubes (CNTs), manganese dioxide (MnO 2 ) and polyaniline (PANI) as the electrode, polyvinyl alcohol/sulfuric acid (PVA/H 2 SO 4 ) gel as the electrolyte and dynamically cross-linked cellulose nanofibers/PVA/sodium tetraborate decahydrate (CNF/PB) hydrogel as the self-healing electrode matrix is developed. The TCMP film electrodes are fabricated through a facile in-situ polymerization of MnO 2 and PANI in TOCNs-dispersed CNTs composite networks, exhibiting lightweight, high electrical conductivity , flexibility, pattern editability and excellent electrochemical properties. Benefited from the hierarchically porous structure and high mechanical properties of TOCNs, excellent electrical conductivity of CNTs and the desirable synergistic effect of pseudocapacitance induced by MnO 2 and PANI, the assembled SC with an interdigital structure demonstrated a high areal capacitance of 1108 mF cm −2 at 2 mA cm −2 , large areal energy density of 153.7 μWh cm −2 at 1101.7 μW cm −2 . A satisfactory bending cycle performance (capacitance retention up to 95 % after 200 bending deformations) and self-healing characteristics (∼90 % capacitance retention after 10 cut/repair cycles) are demonstrated for the TCMP-based symmetric SC , delivering a feasible strategy for electrochemical energy storage devices with excellent performance, designable patterns and desirable safe lifespan.
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高影响因子
Small
·
2024
·Vol. 20
·期 40
·2401995
·
IF 13
Yang-Yang Xie,Qing-Song Liu,Guo-Rui Zhu,Gang Wu,Si-Chong Chen,Yu-Zhong Wang
Upgrading thermosetting polymer waste and harvesting unwanted electromagnetic energy are of great significance in solving environmental pollution and energy shortage problems. Herein, inspired by the glass-blowing art, a spontaneous, controllable, and scalable strategy is proposed to prepare hollow carbon materials by inner blowing and outside blocking. Specifically, hierarchically neuron-like hollow carbon materials (HCMSs) with various sizes are fabricated from melamine-formaldehyde sponge (MS) waste. Benefiting from the synergistic of the hollow “cell body” and the connected “protrusions” networks, HCMSs reveal superior electromagnetic absorption performance with a strong reflection loss of −54.9 dB, electromagnetic-heat conversion ability with a high conversion efficiency of 34.4%, and efficient energy storage performance in supercapacitor. Furthermore, a multifunctional device integrating electromagnetic-heat-electrical energy conversion is designed, and its feasibility is proved by experiments and theoretical calculations. The integrated device reveals an output voltage of 34.5 mV and a maximum output power of 0.89 µW with electromagnetic radiation for 60 s. This work provides a novel solution to recycle polymer waste, electromagnetic energy, and unwanted thermal energy.
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高影响因子
CARBON
·
2024
·
IF 10.5
Ke Xu,Yue Jiao,Jian Li,Huining Xiao,Qiliang Fu
Metal-air batteries require the exploration of affordable electrocatalysts with exceptional catalytic performance for oxygen reduction reactions (ORR). One of the powerful ways to develop highly active and robust oxygen electrocatalysts is to load transition metal compounds onto a highly porous carbon aerogel . Here, we report a cell wall nanoengineering strategy to transform natural balsa wood into a wood-derived carbon aerogel (WCA), following by loading FeP nanoparticles inside the hierarchical N, P-doped WCA for ORR electrocatalysts. Wood nanotechnology is applied to manipulate the microstructure of the porous carbon aerogel with low-tortuosity, multichannel, and aligned pore, which benefits to the electron transportation for boosting the ORR. Under 0.1 M KOH conditions, the initial potential, half wave potential and limit current of FeP@N,P-WCA are 0.95 V, 0.84 V, and 5.20 mA cm −2 respectively, which are much higher than that of untreated wood and comparable to commercial Pt/C. The aqueous Zn-air batteries assembled with this catalyst exhibit a remarkable specific capacity of 775.5 mA h g −1 and better charge-discharge cycling stability. The excellent electrocatalytic activity demonstrated by FeP@N,P-WCA for ORR is attributed to the inherent tri-pathway (lumen, pit, and ray cell) porous structure of wood, the high conductivity and specific surface area of WCA (584.2 m 2 g −1 ), and the highly dispersed FeP nanoparticles . This work provides a structural design concept for achieving high electrocatalytic biobased WCA reactors by combining wood nanotechnology and electrocatalysts chemistry for energy storage and conversion .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Longchao Ma,Yihan Zhao,Tao Zhang,Tiancheng Yuan,Xinzhou Wang,Yanjun Li
The flattened bamboo board (FB) represents a promising innovation in the bamboo industry. To address the challenges of flammability and hygroscopicity, composite coatings consisting of melamine (MEL), phytic acid (PA), cerium ions (Ce 3+ ), and sodium laurate (La) are assembled on the FB surface through an in-situ impregnation strategy. The resulting MEL/PA-Ce 3+ @La FB exhibits exceptional flame retardancy. It achieves a V-0 rating in the vertical burning test (UL-94) and boasts a high limiting oxygen index (LOI) value of 38.5 %. The coated FB exhibits superhydrophobicity, evidenced by a water contact angle of 156.5°, which can be attributed to the in-situ growth of PA-Ce 3+ complexes (for constructing micro/nanoscale coarse structures) and the modification with La (for reducing surface energy).This superhydrophobic surface imparts both self-cleaning and anti-mold properties to the coated FB. Moreover, the coated FB exhibits excellent mechanical stability, withstanding 36 cycles of sandpaper abrasion and tape peeling without losing its hydrophobicity. In summary, this work provides an innovative strategy for the bamboo processing industry to produce flattened bamboo boards with combined flame retardancy, superhydrophobic and anti-mold properties. Such versatility holds significant potential to facilitate the utilization of flattened bamboo boards in the construction and decorative materials industries.
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高影响因子
Communications Materials
·
2024
·Vol. 5
·期 1
·1-8
·
IF 7.5
Ai Yuanfang,Zheng Na,Liu Wenbo,Yang Ping,Wu Xi,Tian Yichen,Wang Chuyi,Liu Heyang,Huang Chongping,Liang Zhongli,Zhu Feng,Tang Longcheng,Ye Nanbiao,Li Jianjun,Cao Kun
Frequent forest fires, driven by hotter and drier climates, threaten biodiversity and human health, causing significant economic losses, air pollution, soil erosion, and degeneration. Current active and passive fire protection methods often suffer from environmental pollution, poor flexibility, and limited availability in remote areas. However, fast-acting surface flame retardants for passive forest fire protection, particularly for foliage, are rare. Herein, we report an easily obtainable gelatin-based fire spray, which resulted in 1.8 and 16.3-fold extension in ignition time, 34% and 39% reductions in total heat release, 78% and 92% reductions in fire growth index for dead and fresh leaves, respectively. After the fire warning is suppressed, for instance by rain, the sprayed substances can decompose and provide nitrogen and phosphorus as leaf and soil fertilizers without affecting soil microbial function, which increase plant net photosynthesis by 84% and effective nitrogen and phosphorus by 664% and 140%, respectively. Our green flame retardant and fertilizer material allows for simultaneous tree fire protection and growth.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yadong Wang,Jingjing Gao,Li Ma,Hui Ge,Guoping Zhu,Zongmin Zhu
The preparation of flame-retardant high-performance polylactic acid (PLA) composites by adding green flame retardants have always been a challenge. In this work, an intumescent flame-retardant PCR based on phytic acid, chitosan, and resveratrol was successfully designed. Adding 4 wt% of PCR, the PLA-PCR composite was classified as UL-94 V-0 grade, with a LOI value increasing from 19.7 % (pure PLA) to 26.0 %, a peak heat release rate decreasing from 433 to 344 kW/m 2 . Owing to excellent compatibility of PCR, the mechanical strength and toughness of PLA-PCR composites have been improved, as reflected by a ~ 16 % increase in tensile strength, a ~ 73 % increase in impact strength and a ~ 57 % increase in toughness. In addition, PCR also presented plasticization effect on PLA, making it easier to process. This work provided a highly efficient and environmental-friendly modification approach for the development of multifunctional polymers.
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高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Dexian Yin,Mengyao Zhai,Xin Wang,Shikai Hu,Xiuying Zhao
Thermoplastic polyurethane (TPU) has restricted applications owing to flammability concerns, whereas conventional intumescent flame retardants predominantly utilize non-renewable feedstocks. In this work, bio-based TPU was synthesized through prepolymer methodology employing bio-based poly (trimethylene ether) glycol, pentamethylene diisocyanate, and 1,4-butanediol. Flame-retardant bio-TPU/PA composites were subsequently fabricated by incorporating bio-based phytic acid (bio-PA) as a modifying agent. Structural characterization and performance evaluation demonstrated that at 20 phr bio-PA loading, bio-TPU/PA composites exhibited decreased tensile strength (from 20.4 MPa to 9.5 MPa) and reduced elongation at break (from 502 % to 324 %). X-ray diffraction analysis revealed that the crystalline structure of bio-TPU remained unaffected by bio-PA incorporation. Notably, the flame-retardant performance of the composites showed progressive enhancement as bio-PA content increased. Specifically, the peak heat release rate declined by 56.2 % (from 1216 kW/m 2 to 533 kW/m 2 ), and the average effective combustion heat exhibited a 24.4 % reduction (from 41 MJ/kg to 31 MJ/kg). This work establishes a sustainable strategy for developing flame-retardant bio-TPU composites, simultaneously addressing fire safety concerns and expanding the application potential of renewable polyurethane materials through environmentally benign modification approaches.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhenyang Li,Huijuan Zhang,Chenyu Li,Xiyu Tian,Shuzheng Liu,Gang Qin,Jia Yang,Qiang Chen
As flexible electronics devices for energy storage, mechanical energy collection and self-powered sensing, stretchable flexible supercapacitor and triboelectric nanogenerator (TENG) have attracted extensive attention. However, it is difficult to satisfy the requirements of high safety and resistance to extreme conditions. Dual roles of mechanical and electrical enhancement of inorganic salt are put forward, and a carrageenan (CG) enhanced poly ( N -hydroxyethyl acrylamide)/CG/lithium chloride/glycerol (PCLG) conductive gel is prepared by designing hydrogen bonding self-crosslinking and chain entanglement . A high concentration and rapid deposition strategy is proposed to prepare a PCLG gel-based stretchable flexible all-in-one supercapacitor for energy storage, and a single electrode PCLG gel-based TENG is designed for mechanical energy collection, self-powered strain and tactile sensing. The supercapacitor has high capacitance, excellent cycling stability. The TENG possesses efficient energy harvesting with high and stable output voltage and power density, and sensitive and stable self-powered strain and tactile sensing without external power supply. Even under extreme conditions such as low temperatures, self-healing after damage, prolonged placement, deformation, post-deformation, multiple continuous work, pinprick and burning, the supercapacitor and TENG still have excellent properties. Therefore, we provide novel ideas to design flexible supercapacitor and TENG used under extreme conditions for future wearable electronics .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hongwei Wang,Tsung-Cheng Yang,Hao Zheng,Zeyi Jiang,Chia-Min Yang,Nien-Chu Lai
Transition metal-based nanoparticles (NPs) are emerging as potential alternatives to platinum for catalyzing the oxygen reduction reaction (ORR) in zinc-air batteries (ZAB). However, the simultaneous coexistence of single-atom moieties in the preparation of NPs is inevitable, and the structural complexity of catalysts poses a great challenge to identifying the true active site. Herein, by employing in situ and ex situ XAS analysis, we demonstrate the coexistence of single-atom moieties and iron phosphide NPs in the N, P co-doped porous carbon (in short, Fe-N 4 -Fe 2 P NPs/NPC), and identify that ORR predominantly proceeds via the atomic-dispersed Fe-N 4 sites, while the presence of Fe 2 P NPs exerts an inhibitory effect by decreasing the site utilization and impeding mass transfer of reactants. The single-atom catalyst Fe-N 4 /NPC displays a half-wave potential of 0.873 V, surpassing both Fe-N 4 -Fe 2 P NPs/NPC (0.858 V) and commercial Pt/C (0.842 V) in alkaline condition. In addition, the ZAB based on Fe-N 4 /NPC achieves a peak power density of 140.3 mW cm −2 , outperforming that of Pt/C-based ZAB (91.8 mW cm −2 ) and exhibits excellent long-term stability. This study provides insight into the identification of true active sites of supported ORR catalysts and offers an approach for developing highly efficient, nonprecious metal-based catalysts for high-energy–density metal-air batteries.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhoujie Wang,Yan Xiang,Wenjun Guo,Min Liu,Xing Gao,Guohuan Li,Lei Sun,Wei Sun,Longhua Xu,Lei Xie
Flotation separation of different minerals is based on the selective modulation of mineral surface properties by flotation reagents. However, a quantitative understanding of the facet-dependent interaction mechanism of different functional groups in typical flotation reagents still remains elusive, resulting in the challenge in accurate modulation of surface interaction in mineral separation processes. Herein, taking a typical serpentine-pyrite flotation system, the chemical force microscopy technique was used to quantitatively measure the intermolecular interactions of various self-assembled monolayers (i.e., OH-SAM, COOH-SAM, and PO 4 -SAM) with different serpentine planes (i.e., SiO basal, MgOH basal, and MgSiO edge) and pyrite surface in aqueous solution at the nanoscale. It was found that all the functional groups exhibited the attractive force with MgOH plane of serpentine during surface approach due to electrostatic double layer interaction, while a pure repulsion was detected on SiO and edge planes at both pH 5.5 and 8.5, indicating that MgOH plane was the dominant facet for reagent adsorption. At the typical flotation condition of pH 8.5, the strong adhesion was observed for –COOH groups interacting with both MgOH plane and pyrite surface during retraction attributed to the metal complexation, while –OH groups were much more adhesive on pyrite surface than that on MgOH plane. In contrast, a strong adhesion on MgOH plane (21.09 ± 0.25 mN m −1 ) and relatively weak adhesion on pyrite (14.93 ± 0.64 mN m −1 ) were respectively observed for −PO 4 groups, which implied the excellent selectivity of −PO 4 groups. Density functional theory (DFT) simulation also indicated the stronger adsorption energy of −PO 4 group with MgOH plane (−73.7 kcal mol −1 ) than pyrite surface (+62.7 kcal mol −1 ). Moreover, the excellent separation performance of phosphoric acid-based reagents was further confirmed during serpentine-pyrite flotation experiments. This work provides quantitative information on molecular interaction mechanisms underlying the adsorption of functional groups on different mineral planes at the nanoscale, which also helps develop a molecular design principle for chemical additives to achieve the selective modulation of target mineral planes in complex mineral pulps.
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Frontiers in Materials
·
2024
·
IF 2.6
Xing Min,Zhang Haifeng,Li Zhiyao,Zhang Ling,Qian Wenhao
Developing bacterial biofilm on the dental unit waterlines increases the risk of cross-infection among oral patients. Although chemical disinfectants can achieve disinfection effects in a short period of time, corrosion damage of dental unit waterlines and water contamination can also occur after continuous use of it. Herein, this study explored a one-step deposition method to prepare a durable and renewable antibacterial N-halamine polymeric coating on polyurethane waterlines. The method utilized polyelectrolyte complexes formed with polyethylenimine (PEI) and phytic acid (PA), followed by chlorination to activate the antibacterial properties. The N-halamine polymeric coating reduces the polyurethane waterline’s water contact angle, thus reducing biofouling deposits and the obstruction of the active halide site on the waterlines, thereby facilitating the maintenance of the cleanliness of the coating. In addition, benefiting both from the active chlorine release and the high density of positive charges on the coating, the polyurethane waterline antimicrobial activity is significantly enhanced. Besides, the N-halamine polymeric coating is biocompatible. This study showed that long-lasting and renewable antimicrobial requirements can be achieved by simple surface modification of N-halamine polymer coatings, which provides a practicable strategy for the production of long-term and reproducible antibacterial dental unit waterlines to reduce the incidence of hospital infection in oral department.
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高影响因子
Lubricants
·
2025
·Vol. 13
·期 3
·103
·
IF 2.9
Wei Li,Huanyi Chen,Long Chen,Shanqin Ge,Qingzhao Cai,Genxiang Gong,Jinhong Yu,Kazuhito Nishimura,Nan Jiang,Tao Cai
Hydraulic technology has been instrumental in the extensive application of offshore mechanical equipment, particularly in drilling platforms and ships, where high-performance hydraulic fluids are essential for safe and efficient operations. Addressing the urgent need for water-based hydraulic fluids as an alternative to traditional oil-based fluids, this study introduces a novel water-based hydraulic fluid fortified with phytic acid, derived from plant seeds, to achieve low biotoxicity, low coefficient of friction, and reduced frictional heat generation. The integration of phytic acid has significantly enhanced the lubricating performance, reducing the average coefficient of friction to as low as 0.013, as tested by the four-ball tester, which is the lowest value reported to date. Real-time monitoring of the temperature rise of the friction testing apparatus using an infrared thermal imager revealed a 78.6% reduction in temperature increase. Acute toxicity assays using Brine Shrimp demonstrated that the 96 h LC50 value for the water–glycol flame-resistant hydraulic fluid with added phytic acid exceeded 26,304 mg/L, indicating low toxicity. Characterization analyses elucidated the mechanisms underlying the improved tribological properties, highlighting the potential of this eco-friendly fluid for safe and efficient offshore operations.
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高影响因子
危险品化学品经营许可证（带存储）