Molecular Catalysis
·
2024
·
IF 3.9
Yun Zhang,Guangfei Qu,Zhishuncheng Li,Junhong Zhou,Rui Xu,Junyan Li
This research has made significant advancements in the field of high-value bio-oil production, specifically focusing on the synthesis of the rare sugar D-Allose. Notably, synthesizing D-Allose through cellulose pyrolysis has long been challenging due to its high synthetic difficulty, which has limited related studies. By employing a one-pot synthesis approach using Al x -Fe y nano-catalysts prepared through a unique cellulose pretreatment method, this experiment successfully achieved efficient generation of D-Allose during rapid pyrolysis. Systematic experimentation demonstrated that at 330 °C with the Al 1 -Fe 5 nano-catalyst, the yield of D-Allose from cellulose pyrolysis reached an impressive 50.69 %, accompanied by a detection of 14.35 % furfural in the bio-oil. This breakthrough not only significantly contributes to the high-value utilization of bio-oil but also provides robust support for further development in this area. Simultaneously, the success of this research extends beyond high-value bio-oil utilization and makes a substantial impact on both the scientific community and industry.
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高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 17
·10375-10388
·
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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FOOD CHEMISTRY
·
2024
·
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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xia Zhang,Xia Liu,Zijie Qu,Luyao Zang,Guodong Zhang,Xiufeng Wang,Fang Wang,Zhiqing Zhang,Ting Zhou
Oil-water separation has been faced significant challenges in treating with oil spill accidents or industrial oily wastewater to protect the ecological environment. Traditional paper-based separation membranes have renewability and high separation efficiency, but they also suffer from issues such as the hydrophilic nature, low flux and fouling. In this study, superhydrophobic cellulose-deposited membrane (CZO-1.0) was fabricated by directly immersing octadecyltrichlorosilane (OTS) and adding zeolite imidazolium framework (ZIF-8). Compared with cellulose membrane (CNF), CZO-1.0 represented superior hydrophobicity (water contact angle up to 152°) and separation performance, attributing to the improved hydrophobicity by modifying OTS with long alkyl chains and the increased surface roughness by ZIF-8 with porous structure. The morphology, wettability, oil–water separation properties, antifouling properties and recyclability of CZO-1.0 have been systemically investigated. Under the action of gravity, a variety of oil–water mixtures (oil phases of n -hexane, ethyl acetate, n -octane, dichloromethane, tetrachloromethane) and actual oils (gasoline and simulated crude oil) were separated. Results exhibited that after 15 separation cycles, the separation flux of the membrane was above 1599 L·m 2 ·h −1 , and the separation efficiency exceeded 95.3 %. The functionalized CZO-1.0 membrane also exhibited alkali resistance and acid resistance (pH from 2.0 to 12). In addition, the contaminants were quickly dissolved in water droplets and detached from the membrane surface, indicating that CZO-1.0 owned significant antifouling properties. This rationally designed superhydrophobic cellulose based membrane has potential application prospects in oil–water separation as an effective and sustainable material.
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CELLULOSE
·
2024
·
IF 4.9
Yan Yujie,Jin Bo,Peng Rufang
Ammonium perchlorate (AP), as an oxidant and a main component in solid propulsion, has been of wide concern by researchers in recent years. However, problems, such as higher high-temperature decomposition peaks and nonconcentration of exothermic heat release, hinder its application. The addition of combustion catalysts can resolve these problems, but the small size of metals is prone to agglomeration and affects the performance of AP. Graphene oxide, which has a large specific surface area as a carrier, hydroxyethyl cellulose as an intercalating agent, cobalt nitrate as the three-dimensional porous carbon aerogel were prepared as catalyst for AP. The high-temperature decomposition peak of AP was greatly reduced by 116.5 K, which resulted in a great energy release.
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ENZYME AND MICROBIAL TECHNOLOGY
·
2024
·
IF 3.4
Shuang Jin,Hongyao Cai,Cailiang Peng,Yupeng Cheng,Yubin Ren,Weili Liu,Yujie Fu,Chen Lv
This study utilizes deep eutectic solvent (DES)-assisted enhancement of cellulose-based immobilized probiotics for efficient biotransformation of isofraxidin from Acanthopanax senticosus . Among seven probiotic strains tested, Lactiplantibacillus plantarum CICC 20767 exhibited the best catalytic activity. We explored the effects of 12 different DESs with varying hydrogen bond donors on the conversion capacity of the immobilized probiotics, with the highest efficiency observed using ChCl/EG (4.0 wt %). The optimized process, with a solid-to-liquid ratio of 1:5 (g/mL), a temperature of 35.6 °C, a reaction time of 4 d, and a pH of 6.9, resulted in a 5.53-folds increase in isofraxidin yield, reaching 0.4034 mg/g, compared to the untreated sample (0.0729 mg/g). The immobilized probiotics retained excellent catalytic activity after 12 cycles of use, demonstrating their stability and potential for large-scale, green production of isofraxidin. This study presents a valuable method for industrial isofraxidin production and highlights the broad potential of this environmentally friendly bioconversion process in the pharmaceutical industry.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xingya Kang,Baoying Wang,Yanhong Ding,Li Xu,Yan Zhang
In order to solve the drawbacks of carboxylated cellulose nanocrystals (CNCs) prepared by critic acid (CA) hydrolysis method, such as low yield and low esterification degree, herein, ball milling assisted CA hydrolysis method was applied to obtain carboxylated CNCs and cellulose nanofibers (CNFs) with fine and uniform size, high yield and carboxyl content, good crystallinity, and good thermal stability. It was discovered that the diameter of CNCs and CNFs were decreased and the size uniformity was improved. The yield of CNCs was obviously improved to 39.8 % due to the promoted esterification reaction, which was 3.3 times of that without ball milling. Moreover, the carboxyl group content of CNCs and CNFs were improved to a maximum of 0.52 and 0.48 mmol/g, respectively. As ball milling progressing, more amorphous regions were destroyed and cellulose bundles were dissociated, resulting in CNCs and CNFs with high crystallinity. The thermal decomposition temperature of CNCs and CNFs were ranged from 317 to 331℃, which was higher than that had reported. This work provided an effective route for carboxylated CNCs with good yield, esterification degree and other performance, which was beneficial for the subsequent applications in the field of biomaterials.
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Materials Horizons
·
2025
·
IF 10.7
Jianfeng Gu,Zhaohui Luan,Xinmin Zhang,Huihui Wang,Xu Cai,Weiqing Zhan,Xinyi Ji,Jiajie Liang
Recent advances in interfacial solar steam generation have made direct solar desalination a promising approach for providing cost-effective and environmentally friendly clean water solutions. However, developing highly effective, salt-resistant solar absorbers for long-term desalination at high efficiencies and evaporation rates remains a significant challenge. We present a Janus hydrogel-based absorber featuring a surface modified with thermo-responsive hydroxypropyl cellulose (HPC) and a hydrogel matrix containing photothermal conversion units, MXene, specifically designed for long-term seawater desalination. At the lower critical solution temperature, HPC undergoes phase separation, which results in the formation of a rough hydrophobic surface. This process creates a Janus evaporator structure that exhibits a high evaporation rate, excellent salt resistance, and long-term stability. Consequently, the hydrogel absorbers achieve an impressive evaporation rate (3.11 kg m−2 h−1) under one-sun irradiation. Salt residues are deposited only at the edges of the super-hydrophilic bottom. This process ensures long-term evaporator stability for continuous solar evaporation (>30 hours) in simulated seawater at an average evaporation rate of ∼2.58 kg m−2 h−1. With its unique structural design, achieved via a straightforward design process, the flexible Janus absorber serves as an efficient, salt-resistant, and stable solar steam generator for direct solar desalination.
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Fibers
·
2025
·Vol. 13
·期 3
·29
·
IF 3.9
Sheng Ye,Sohail Yasin,Haijie Zhi,Yihu Song,Chaohua Gu,Jianfeng Shi
High-pressure hydrogen storage systems (up to 100 MPa) require advanced materials for safety and reliability, particularly for rubber seals, which are prone to degradation under extreme conditions. This study explores the use of cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs) as sustainable nanofillers for nitrile butadiene rubber (NBR) latex nanocomposites. CNFs and CNCs were evaluated for their effects on mechanical properties, crosslink density, and resistance to high-pressure hydrogen exposure in rubber O-rings. A life cycle assessment (LCA) was carried to assess the environmental impact of these nanocomposites. The results showed that CNF-filled NBR composites exhibited better resistance to bubble formation under hydrogen exposure compared to CNC-filled ones. However, the LCA indicated relatively high environmental impacts for both, reaching up to 2.5 kg CO2eq. in Global Warming Potential (GWP), highlighting the need for further optimization of production processes. This study demonstrates the potential of cellulose nanofillers to improve NBR performance while advancing sustainable hydrogen storage materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ao Li,Jun Xu,Dezhong Xu,Zhaohui Zhang,Daxian Cao,Jun Li,Wei Zhang,Fengshan Zhang
High-performance flexible piezoresistive pressure sensors have garnered considerable attention for health monitoring and medical diagnostics. However, achieving both high sensitivity and a wide detection range is often limited by complex, costly microstructural designs. Furthermore, the non-degradability of many sensing materials poses environmental challenges. Here, we present an innovative, flexible, fully degradable pressure sensor based entirely on cellulose-based paper and MXene. Utilizing a cost-effective dip-coating method, MXene was uniformly deposited onto cellulose-based paper substrates with six distinct fiber microstructures, including natural fibers (cellulose I) and viscose fibers (cellulose II), forming a conductive sensing layer. The sensor, featuring a sandwich structure with the core sensing layer and cellulose paper-based encapsulation layers, demonstrates high sensitivity (36.87 kPa − 1for 0–1.3 kPa), 11.39 kPa − 1 for 1.3–60 kPa, 1.25 kPa − 1 for 60–79 kPa), a wide pressure range (0–79 kPa), a lower detection limit (3.7 Pa), and fast response/recovery times (113 ms/81 ms). The sensor also shows excellent cyclic stability and can detect both dynamic and static pressures, making it suitable for monitoring physiological signals such as speech vibrations, finger movements, and wrist pulses. Significantly, this sensor is fully biodegradable under natural conditions within 58 days, offering an environmentally sustainable and cost-effective solution for the future of wearable electronics.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xu Wang,Quan Gao,Yongfa Zhou,Zhihan Wang
The hierarchical porous carbon aerogels derived from celluloses are one of promising electrodes for the next-generation supercapacitors. The direct pyrolysis strategy for synthesizing cellulose carbon aerogels can integrate the advantages of the in-situ activation and heteroatoms doping. In this study, the hierarchical porous carbon aerogels were prepared using different methods (including conventional, KOH activation, and direct pyrolysis). The carbon aerogels that were simultaneously carbonized and activated during direct pyrolysis process, exhibited remarkable properties including high BET surface areas of up to 2764.78 m² g -1 , a substantial pore volume of up to 2.53 cm 3 g -1 , a broad pore distribution encompassing micropores, mesopores and macropores, and an optimal N content. Consequently, these carbon aerogels exhibited a notable specific gravimetric capacitance of 334.5 F g -1 and exceptional cycling stability with 100% of capacitance retention after 10 000 cycles in the 6 M KOH electrolyte. This direct synthesis route, featuring in-situ activation and doping, rendered cellulose porous carbon aerogels as promising materials for advanced supercapacitor application.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qinan Hou,Yunhui Chen,Jiefei Wang,Meiqin Wu,Hou-Yong Yu,Xiaohua Wang
Polyamide 66 (PA66), a globally attractive high-performance plastic, is hindered by its poor fire resistance, which triggers excessive smoke and dripping. In this work, we introduce a novel halogen-free, thermal insulating flame-retardant for PA66, modified by cellulose nanocrystals (CNCs) with 3-aminopropyltriethoxysilane (APTES) and phosphoric acid (PA) to form a spider web-like nano composite CNC/A/P, by improving the thermal stability and inhibiting the droplet phenomenon of PA66. This high self-extinguishing flame retardant owns a 56.9 % residual carbon rate and the limiting oxygen index of 42.74 %. PA66-C15, incorporating 15 wt% CNC/A/P, significantly enhances PA66's flame retardancy, achieving a V-0 rating, and a rising LOI of 46.7 % from 21.6 %. Surprisingly, a 114.3 % temperature reduction (194.1 °C) under heating alcohol lamp were also observed in this PA66 composite, preserving superior tensile strength mechanical properties and thermal insulation. This study presents a promising, high-performance CNC-based flame-retardant material with excellent fire retardancy and mechanical properties.
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