MATERIALS CHEMISTRY AND PHYSICS
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2024
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IF 4.3
Xueqing Shi,Lvye Yang,Jianfeng Yao
A new simple preparation method for water-in-salt-type cellulose hydrogels filled with ZnBr 2 is reported. The ZnBr 2 hydrogel electrolyte can be applied to zinc-ion hybrid supercapacitors and Zn–Br interfacial batteries. The water-in-salt ZnBr 2 hydrogel serves as a stable electrolyte for good electrochemical performance in zinc-ion hybrid supercapacitors without redox reactions and can participate in the charging/discharging process of the Zn–Br interfacial battery through the redox reaction of halogen anions. The assembled zinc-ion hybrid supercapacitor exhibits a specific capacitance of 241.8 F g −1 at 0.5 A g −1 . Furthermore, after a 10,000-cycle-long charging/discharging test at 5 A g −1 , the coulombic efficiency is found at nearly 100 %. The interfacial battery reaches the highest energy efficiency of 66 % at a current density of 3 mA cm −2 at 0–1.8 V and displays a good cycle life with an 88 % average coulombic efficiency at 3 mA cm −2 . This work expands the application of hydrogels and provides new possibilities for optimizing the high performance of electrolytes.
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Aggregate
·
2024
·
IF 13.9
Wenye Sun,Bing Tian,Bang An,Rui Teng,Mingcong Xu,Chunhui Ma,Zhijun Chen,Haipeng Yu,Jian Li,Wei Li,Siqi Huan,Shouxin Liu,Orlando J. Rojas
Circularly polarized luminescent materials find extensive applications in 3D displays, information encryption, and photoinduced supramolecular chirality. However, controlling the handedness of circularly polarized luminescence remains a significant challenge in advancing optical technologies. In this study, we present a Janus circularly polarized light emitter comprising a fluorescent film combined with chiral nematic cellulose with switchable chirality. The emitter achieves maximum luminescence dissymmetry factors (0.28 and −0.65) through mode switching. In addition, we show the emitter's versatility in inducing chiral helices in azobenzene polymers with varying polar groups, resulting in significant chiral signals. Importantly, the chirality of these polymers can be switched by altering the luminescence mode of the emitter. These results are expected to facilitate the efficient design of chiral luminescent materials and photoinduction devices.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Xiongwei Dong,Qi Sun,Xincan Shi,Zixiong Yin,Beini Zeng,Zheng Huang,Xiang Li
Lyocell fibers, the most successful regenerated cellulose fibers, have already attracted much attention. However, the use of traditional Lyocell fibers in the field of personal protective equipment (PPE) is limited, due to the lack of antibacterial properties. Additionally, the flame-retardant properties of Lyocell fibers are also required for the specific applications. Here, we co-conjugated phosphorus flame retardants and copper-thiosemicarbazone complexes with antibacterial performance on Lyocell fibers through chemical crosslinkers. The chemical composition and morphology of our engineered Lyocell fibers were fully characterized, and their mechanical properties were also maintained. Flame retardants can import flame-retardant properties (LOI: 25.0 % - 25.7 %) to Lyocell fibers, which also show promising antibacterial activity , suppressing Escherichia coli (GIR: 20.51 % - 66.67 %) and Staphylococcus aureus (GIR: 74.19 % - 93.54 %). Such an improved sustainable formulation can be used to produce the next-generation of Lyocell-based PPE, to meet the demand for the antibacterial and flame-retardant properties of fibers in special applications.
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Journal of Cleaner Production
·
2024
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IF 9.7
Yang Liu,Chunbao Zhou,Asif Ali Siyal,Chenglong Liu,Yingwen Zhang,Jie Fu,Huimin Yun,Jianjun Dai,Xiaotao Bi
In this paper, a cleaner pyrolysis strategy combining microwave heating, catalyst and carbon dioxide was explored for converting biomass components into higher quality products. Catalytic pyrolysis was more favorable for the decomposition and conversion of complex biomass structures. For furfural residue pyrolysis , potassium sulfate contained in sample served as the main catalytic component. Potassium sulfate promoted the increase of phenols in bio-oil. Notably, carbon dioxide atmosphere promoted the decomposition of substances and exerted a significant effect on biomass pyrolysis , which increased bio-oil yield and declined gas yield. When the pyrolysis atmosphere was changed from nitrogen to carbon dioxide, the I D /I G ratio decreased from 1.07 to 0.74, indicating that carbon dioxide decreased defect structure in biochar. Carbon dioxide enriched the porous structure and surface roughness of biochar. Also, carbon dioxide as a carrier gas was found to be more effective than nitrogen in improving the heating values of biochar and the acidity of bio-oil under carbon dioxide was lower than that under nitrogen, which was conducive to the subsequent utilization of biochar and bio-oil. Carbon dioxide promoted the production of alcohols, alkenes , and alkanes in bio-oil. Beneficially, the interaction of cellulose and lignin inhibited the release of hydrogen chloride . At last, this study also provides insights into the mechanism of catalyst and CO 2 on biomass microwave pyrolysis .
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ailing Xu,Qingning Xia,Yunjie Ju,Yonggui Wang,Zefang Xiao,Haigang Wang,Yanjun Xie
Conductive gels are crucial in developing today’s flexible wearable technologies and have attracted widespread attention. However, achieving a harmonious balance among mechanical, sensing performance, and other functions still poses a significant challenge. This study designed an ionic liquid/poly (N, N-dimethylacrylamide-methacrylic acid-acrylamide)/cellulose (BPC) ionogel ternary system. The BPC ionogels exhibited excellent adhesion (47.18 kPa), self-healing capabilities, electrical conductivity, and mechanical properties including tensile strength (0.48 MPa), and elongation at break (899.69 %). In addition, the BPC ionogels have been proven suitable for making highly sensitive strain and temperature sensors, which could accurately identify human joint bending dynamics and facial micro-expression changes. It was characterized by fast response speed (140 ms), high sensitivity (strain sensitivity: 3.95–11.82, temperature sensitivity: 4.25 %/℃), and excellent cycle stability. When the BPC ionogel was customized into a capacitive pen, it could achieve smooth and delicate drawing operations on a smart touch screen. In summary, the BPC ionogels designed in this study demonstrate great potential in wearable electronic devices and human–computer interaction.
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Small
·
2025
·
IF 12.1
Han Han,Hetang Wang,Rujie Wang,Zhijie Duan,Xiaodong Jiang,Jiaqi Du
Air pollution has emerged as a global challenge, posing significant threats to public health and human well being. This issue has garnered substantial attention from researchers focused on developing environmentally friendly and sustainable materials. This study synthesizes bacterial cellulose (BC)-derived aerogels based on plant polysaccharides and BC using a directional freeze-drying technique, followed by surface modification with methyltrimethoxysilane (MTMS). The physicochemical characteristics of these BC-derived aerogels are thoroughly investigated to elucidate the interaction mechanisms between plant polysaccharides and bacterial cellulose at the molecular level, and their capabilities for particulate matter filtration are explored. The results demonstrate that incorporating plant polysaccharides and MTMS into BC aerogels results in synergistic mechanical properties characterized by a unique combination of softness and rigidity. Notably, sodium alginate shows the highest affinity for bacterial cellulose and MTMS, leading to optimal reinforcement effects. An oriented honeycomb structure forms internally within the aerogels, potentially reducing pressure drop. Furthermore, these aerogels exhibit a “fiber+pore” multi-filtration mechanism, achieving up to 97% filtration efficiency specifically for PM2.5 particles. These findings suggest bacterial cellulose-derived aerogels could be a sustainable alternative for mitigating air pollution.
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ACS Applied Electronic Materials
·
2024
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IF 4.3
Hongjian Zhang,Changzhou Du,Yong Zhang
Flexible pressure sensors play a vital role in advancing wearable electronics by enabling precise health monitoring, human-machine interfaces, and environmental sensing. MXene-based piezoresistive sensors have garnered significant attention due to their exceptional electromechanical properties. However, enhancing their performance and ensuring environmental sustainability simultaneously still remain critical challenge. In this study, we prepared hydroxyl-rich deacetylated cellulose acetate (DCA) fibers and attached MXene to the surface to form a three-dimensionally interconnected conductive network. Taking advantage of the typical micromorphology and in turn the high electrical conductivity modulation, the resulting MXene/DCA (MDCA) flexible sensors exhibited exceptionally high sensitivity (54.62 kPa–1), excellent linearity in the range of 0–40 kPa (R2 = 0.998), fast response/recovery time (154/125 ms), and outstanding long-term durability over 10 000 compression cycles at 12.37 kPa without significant degradation. This study offers promising insights into the development of high-performance, environmentally friendly piezoresistive sensors.
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Biomaterials Advances
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2024
·
IF 5.5
Manjila Adhikari,Bianza Moise Bakadia,Li Wang,Ying Li,Zhijun Shi,Guang Yang
Effective treatment of infected wounds remains a challenge due to the rise of antibiotic-resistant microorganisms. The development of advanced materials with strong antimicrobial properties is necessary to address this issue. In this study, a unique composite of electrically modified bacterial cellulose (EBC) with allantoin (ABC) and zein was developed by dipping diffusion method. Morphological structural analysis revealed a uniform distribution of zein and aligned fibers, confirming the synthesis of the ABC-Zein composite. The formation of ABC-Zein was further confirmed by attenuated total reflection-Fourier transform infrared (ATR-FTIR), which displayed additional peaks corresponding to EBC, indicating the incorporation of zein into ABC. X-ray diffraction (XRD) analysis of ABC-Zein demonstrated a similar crystalline structure with EBC. The ABC-Zein showed mechanical integrity (tensile strength: 1.15 ± 0.21 MPa), thermal stability (degradation temperature: 290 °C), porous structure (porosity: 40.23 ± 0.21 %), and hydrophilic (water contact angle: 53.3 ± 5.3°) properties. Furthermore, the antimicrobial agent terpinen-4-ol (T4O), derived from tea tree oil, was incorporated into the ABC-Zein composite. Biological studies confirmed the antimicrobial efficacy ( Staphylococcus aureus inhibition: 88.5 ± 7.19 %) and biocompatible (cell viability: 84.95 ± 5.6 %, hemolysis: 4.479 ± 0.39 %) nature of the T4O-ABC-Zein composite. The combined effects of the aligned fiber structure, zein protein, and antimicrobial T4O significantly enhanced infected wound healing by day 7, promoting inflammatory response, granular tissue formation, cell proliferation, and angiogenesis. By day 14, T4O-ABC-Zein facilitated complete wound healing, with reepithelization, collagen I deposition, and downregulation of CD 31, Ki67, and α-SMA. Overall, the innovative T4O-ABC-Zein composite, with an aligned fiber structure, improved biocompatibility, and antimicrobial properties, holds significant potential for the treatment of infected wounds.
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FOOD CHEMISTRY
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2024
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IF 8.5
Hong Zhu,Ruilin Wang,Jun-Hu Cheng,Kevin M. Keener
In this study, an antibacterial material (CNF@CoMn-NS) with oxidase-like activity was created using ultrathin cobalt‑manganese nanosheets (CoMn-NS) with a larger specific surface area grown onto pineapple peel cellulose nanofibrils (CNF). The results showed that the CoMn-NS grew well on the CNF, and the obtained CNF@CoMn-NS exhibited good oxidase-like activity. The imidazole salt framework of the CNF@CoMn-NS contained cobalt and manganese in multiple oxidation states, enabling an active redox cycle and generating active oxygen species (ROS) such as singlet molecular oxygen atoms ( 1 O 2 ) and superoxide radical (·O 2 − ), resulting in the significant inactivation of Staphylococcus aureus (74.14%) and Escherichia coli (54.87%). Importantly, the CNF@CoMn-NS did not exhibit cytotoxicity. The CNF@CoMn-NS further self-assembled into a CNF@CoMn-NS paper with flexibility, stability, and antibacterial properties , which can effectively protect the wound of two varieties of pears from decay caused by microorganisms . This study demonstrated the potential of using renewable and degradable CNF as substrate combined with artificial enzymes as a promising approach to creating antibacterial materials for food preservation and even extending to textiles and biomedical applications.
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ACS Applied Polymer Materials
·
2024
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IF 4.4
Jiang Liu,Zhaoheng Zhu,Yukun Huang,Long Wang,Kai Jia
There is a critical need to develop cost-effective and efficient adsorption materials for the removal of technetium-99 (99Tc) from contaminated water sources. This research presents the synthesis of amino-modified cellulose microspheres (CM-APTS) through the addition of 3-amino-propyl triethoxysilane (APTS) to regenerated cellulose microspheres (CM), followed by a subsequent reaction with ethylene dibromide (EDB) to produce halogen-modified amino cellulose microspheres (CM-APTS-EDB). These are engineered for the effective absorption of ReO4–, serving as a chemical surrogate for TcO4–. By altering the amount of ethylene dibromide used, two variations of bromine-modified cellulose microspheres, CM-APTS-EDBs and CM-APTS-EDBe, are synthesized. Among these, CM-APTS-EDBe exhibits robust adsorption capabilities for ReO4– across a pH spectrum of 2.5–10, attaining a peak capacity of 281 mg·g–1, and demonstrates selective adsorption of ReO4– even in the presence of competing anions such as NO3–, Cl–, and SO42–. Characterization through X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) indicates that the adsorption mechanism predominantly involves interactions between ReO4– and N+, hydrogen bonding with amino hydrogen, and σ-hole-anion interactions between Re–O and C–Br. After eight adsorption–desorption cycles, CM-APTS-EDBe retains notable stability and reusability. Additionally, the material efficiently captures ReO4– from simulated Hanford Low Activity Waste (LAW) wastewater, achieving an adsorption efficiency of 77.26% at a solid–liquid ratio of 40 g·L–1. This investigation underlines the potential of halogenated regenerated cellulose microspheres in designing advanced adsorbents for the removal of radioactive pollutants like TcO4–/ReO4–, offering a strategy for environmental remediation efforts.
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CELLULOSE
·
2024
·Vol. 31
·期 17
·10375-10388
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IF 4.9
Hong Dican,Li Gaosheng,Wei Xuanru,Sun Chenyu,Shi Zhuqun,Yang Quanling,Xiong Chuanxi
Electronic skin, as an intelligent material capable of simulating human skin functions, plays a crucial role in long-term stable health monitoring, human–computer interaction, and medical devices. However, to achieve the application of highly functional electronic skin, there remains a challenge in fabricating pressure sensors that simultaneously possess flexibility, vapor permeability, and exhibit excellent sensing capabilities. Herein, we prepared a dispersion of 2,2,6,6-tetramethylpiperidinyl-1-oxy oxidized cellulose nanofiber (TOCN) and hollow polypyrrole (hPPy) microspheres prepared through the template method. The hydrogel films were obtained by a simple blending approach and Ca 2+ crosslinking followed by drying. The resulting TOCN/hPPy hydrogel films exhibited good mechanical properties, exceptional flexibility, and reliable vapor permeability. Notably, the developed piezoresistive pressure sensor demonstrated a sensitivity of 2.08 kPa −1 , along with a fast response time (90 ms) and recovery time (150 ms). Furthermore, the sensor exhibited a low detection limit of 7.8 Pa, excellent stability at high pressures, and long-term cycling stability of up to 12,500 cycles. Graphical abstract
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ACS Omega
·
2024
·
IF 3.7
Zuwu Tang,Yuqing Yang,Yuwei Pan,Meiqiong Yu,Xinxing Lin,Ajoy Kanti Mondal
Hydrogels have drawn intensive attention as fascinating materials for biomedicine. However, fabricating hydrogels with injectable and self-healing properties remains a challenge. Herein, we reported a biocompatible poly(N-vinylpyrrolidone)/carboxymethyl cellulose (PVP/CMC) hydrogel with excellent injectable and self-healing properties. The PVP/CMC hydrogel exhibits good biocompatible, injectable, and self-healing properties. The sol–gel transition of PVP/CMC hydrogels demonstrates an outstanding self-healing behavior, and the bisected hydrogels can self-heal within 30 s. The hydrogels have a good swelling ratio, and the swelling ratio increases with increasing amount of CMC in PVP and reaches a maximum of 2850% at a 1.0:1.5 PVP and CMC ratio. In addition, the hydrogel possesses excellent drug release capacity, and its drug release rate reaches 70%. Moreover, the release of 4-aminosalicylic acid (4-ASA) in the hydrogel can be controlled by adjusting the proportion of the hydrogel. The PVP/CMC hydrogel with excellent biocompatible, injectable, and self-healing properties has great potential for applications in drug release.
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