INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Yifan Tong,Fei Xue,Xiaogang Lu,Xinyi Liao,Junyi Meng,Linxin Zhong,Hongxiang Zhu
In recent years, interest in biomass-derived conductive carbon aerogels for flexible wearable sensor devices has been increasing. This paper presents a novel, streamlined methodology for synthesizing nitrogen–phosphorus co-doped carbon aerogels from bacterial cellulose (BC) that exhibit exceptional mechanical and sensing properties. The strategic incorporation of ammonium and phosphate reduces defects during the carbonization phase. Substituting traditional solvents in the BC hydrogel with tert-butanol (TBA) preserves the integrity of the continuous three-dimensional aerogel network throughout lyophilization. Following pyrolysis under optimized carbonization conditions, the aerogels display regular, parallel microtubular structures that enhance their compression fatigue resistance. The resultant nitrogen–phosphorus co-doped BC carbon aerogel demonstrates an extraordinarily high stress retention rate (98.4 % after 1000 compression cycles) and maintains 100 % retention in cyclic compression tests, surpassing all similar compressible materials documented in the past five years. When employed in wearable piezoresistive pressure sensors, the carbon aerogel exhibits heightened sensitivity (0.57 kPa −1 ) and an extensive operational range (0.239–6.714 kPa), enabling the detection of diverse human movements.
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AICHE JOURNAL
·
2025
·
IF 4
Xue Gao,Lei Zhang,Shaohuang Chen,Mei Cui,Renliang Huang,Wei Qi,Rongxin Su
The commercial application of phosphorylated cellulose nanofibrils (PCNFs) is restricted by the high environmental burdens and production costs. In this study, we developed an integrated process incorporating solvent-free phosphorylation and recycled filtrate-based phosphorylation for sustainable production of PCNFs. The phosphorylation process consisting of solvent-free ball milling and heat curing was optimized, and the obtained PCNFs showed high charge content (3.78 mmol/g) and ultrafine diameter (~2.2 nm). The washing filtrates were recycled as the aqueous solutions used in heat soaking-based phosphorylation, which could be regarded as the substitute of pure urea and phosphates. Moreover, this integrated phosphorylation process exhibited enhanced environmental friendliness with an average reduction ratio of 14.7% across all impact categories, and the production cost decreased by 31.7% compared with the traditional production route, as the life cycle assessment and techno-economic analysis results revealed. This integrated process offers valuable guidance for the sustainable industrial-scale production and efficient commercialization of PCNFs.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiaoyu Zhu,Mingda Che,Renliang Huang,Mei Cui,Wei Qi,Rongxin Su
The widespread use of petrochemical-based plastics has led to significant environmental concerns. Cellulose fiber structural materials were widely used in automotive manufacturing and construction industries and have emerged as a potential solution to this issue. However, interfacial bonding issues between cellulose fibers hinder further material development. In particular, cellulose microfibers exhibit even more challenging interfacial bonding, greatly limiting the enhancement of the mechanical properties. Herein, a bottom-up approach was used to prepare phosphorylated cellulose microfibers hydrogels strengthened by externally induced Ca2+ cross-linking. Phosphorylated cellulose microfiber hot-pressed structural materials (PMHM) were then fabricated under the combined influence of temperature and pressure. The results indicate that the strength of PMHM is 273 MPa and that its modulus is 16 GPa. Its mechanical properties are significantly higher than those of commercially available petrochemical-based plastics and are comparable to those of nanocellulose-assembled materials. Additionally, the limiting oxygen index of PMHM is 41.13%, which classifies it as a flame-retardant material. Its coefficient of thermal expansion is 7 × 10–6 K–1, and it remains stable at temperatures up to 200 °C. Notably, PMHM undergoes significant degradation when exposed to the natural environment for 70 days and can be molded into materials for various industrial parts. Given its excellent mechanical properties, flame retardancy, degradability, and processability, PMHM has considerable application potential in fields such as automotive manufacturing and construction.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Wang Qing,Yu Mingguang,Chen Guangxue,Chen Zijian,Zhong Yingying,Mo Qijie,Wang Honghu
Herein, a facile strategy for fabricating cellulose-based paper with dual humidity-pH responsive room-temperature phosphorescence (RTP) through molecular excited-state modulation was reported. The phosphorescent system was constructed by immobilizing ethylenediamine-mediated condensation product of 4-bromo-1,8-naphthalic anhydride (forming 1,8-naphthalimide derivatives) onto cellulose matrix via hydrogen-bond rigidification. Post-papermaking and drying processes, the developed material exhibits remarkable excitation-dependent dual emission: orange-red phosphorescence ( τ = 6.3 ms) under ambient conditions and blue fluorescence ( τ = 3.3 ns) under saturated humidity. Notably, the humidity-responsive luminescence switching demonstrates excellent reversibility after drying cycles. Furthermore, the incorporated naphthalimide moiety preserves its inherent pH sensitivity, enabling simultaneous pH detection through emission wavelength shifts. Systematic characterization reveals that the humidity response originates from water-molecule regulated intersystem crossing efficiency, while the pH response stems from protonation-induced electronic structure modifications. This work establishes a novel paradigm for designing multi-stimuli responsive smart materials through rational manipulation of molecular excited states, demonstrating potential applications in paper-based anti-counterfeiting technologies.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Mengyao Guan,Zhiliang Han,Na Liu,Zhou Zhou,Xiangyang Qu,Tao Zhang,Shiyan Chen,Huaping Wang
Hydrogel based electrodes have been applied in the field of bioelectronics, which is of great significance for constructing a robust human-computer interface. However, achieving both reliable conductivity and tissue matching mechanical properties remains challenging. Here, we report a synergistic strategy for constructing a hydrogel electrode for bioelectronic interface with tissue modulus and high conductivity by bacterial cellulose (BC) template induced growth polypyrrole (PPy) electrical percolation network combining a polymethacryloyloxyethyl trimethyl ammonium chloride (PDMC) hydrophilic network. This strategy balances the modulus and conductivity of the bioelectrode, makes up for the adverse effect of the conductive filler on the mechanical properties of the hydrogel, and constructs an effective conductive pathway. The electrical percolation of the hydrogel can be achieved at a low permeability threshold, and the flexibility ( E = 288 kPa) of the hydrogel electrode with high conductivity (135.75 S/m) can be obtained. Moreover, the hydrogel electrode has low interface impedance and superior charge storage and injection capability, which allows higher signal-to-noise ratio of recording epidermal electrophysiological signals than that of commercial electrodes. The conductive, flexible and biocompatible hydrogel prepared here provides a new way to construct reliable bioelectronic devices.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Zhongmei Tan,Mengguo Wu,Bailiang Li,Zhanmei Jiang,Jiage Ma,Juncai Hou
To achieve the positive effects of probiotics, it is crucial to enhance their viability and stability throughout gastrointestinal tract. In the study, polyvinyl alcohol-fucoidan@ethyl cellulose (PVOH-FUC@EC) core-shell electrospun nanofibers with flow ratios of 1:1, 1:1.5 and 1:2 by coaxial electrospinning were developed to co-encapsulate Lactiplantibacillus plantarum 69-2 (LP69-2) and dihydromyricetin. The average diameter of PVOH-FUC@EC nanofibers decreased, while the shell thickness of PVOH-FUC@EC nanofibers increased as the shell solution flow ratios increased. Furthermore, the successful formation of core-shell structure of PVOH-FUC@EC nanofibers was verified by confocal laser scanning microscopy and transmission electron microscope. PVOH-FUC@EC nanofibers with higher shell flow rate presented superior thermal stability. Compared with uniaxial nanofibers, the antioxidant capacity of PVOH-FUC@EC core-shell nanofibers was significantly enhanced when core-shell flow ratio was 1:1 ( P < 0.05). Moreover, the survival rate of LP69-2 embedded in PVOH-FUC@EC core-shell nanofibers was significantly elevated after simulated gastrointestinal digestion ( P < 0.05). Overall, this study further revealed that EC-coated core-shell nanofibers was an effective and novel approach for co -delivering probiotics and polyphenols by coaxial electrospinning, thereby improving their efficacy in functional foods.
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ACS Omega
·
2025
·
IF 4.3
Brian Zhao,Chenghao Wang,Jia Huang,Junyao Zhang
Developing covert, convenient, rapid, and cost-effective detection methods for trace amounts of addictive drugs poses a challenging task. Herein, wood-derived ionic conductive cellulose (WICC) is presented as a sensitive material, where active metal cations serve as charge carriers and effective adsorption/binding sites for a typical analog of the addictive drug N-methylphenethylamine (MPEA). The addition of Cu2+ ions improves the sensing performance of WICC, and the simple drop-coating process will facilitate the fabrication of the device array and the integration with flexible substrates. Taking advantage of WICC with excellent ion conductivity, high transparency, and mechanical flexibility, transparent and flexible sensors based on WICC are demonstrated, enabling real-time detection of MPEA. Notably, the high transparency makes WICC particularly suitable for covert detection. More significantly, the WICC sensors exhibit outstanding selectivity, facilitating an ultralow theoretical detection limit (∼12 nL). This work provides a promising pathway toward the next-stage construction of invisible chemical sensors for addictive drug detection.
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CELLULOSE
·
2025
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IF 4.8
Bai Xiaoyu,Wan Mengyu,Fan Wuhou,Kang Jianping,Xia Zhaoxia,Li Jiangtao,Lan Jingying,Xiao Lan,Zuo Song,Jiang Yuanzhang,Tan Lin,Zhang Yong
Electrostatic spinning technology can prepare nanofiber materials with high specific surface area and unique microstructure. Cellulose acetate (CA) has excellent membrane formation and processability, while chitosan (CS) is positively charged due to the abundance of amino groups and has certain biological activities. In this paper, CA/CS nanofiber membranes with different CS contents were prepared by solution blending and electrostatic spinning techniques and used in hemoperfusion (HP) for targeted removal of endotoxins. The CA/CS nanofibrous membranes were systematically characterized using infrared spectroscopy, scanning electron microscopy, etc., and the clearance ability of CA/CS nanofibrous membranes for endotoxin was tested under static and dynamic simulated HP conditions. The results showed that the addition of CS changed the structure of CA nanofibers, significantly increased the specific surface area of CA/CS nanofiber membrane, and provided more adsorption sites for the membrane material. The positive charge of CS interacted with the negatively charged endotoxin in the blood through electrostatic attraction, which enabled the CA/CS nanofiber membranes to adsorb endotoxin efficiently and exhibit higher endotoxin clearance ability. In the static adsorption experiment, when the CS content was 3.75%, the endotoxin adsorption and clearance rate could reach 580.0 ± 32.2 EU/g and 65.1 ± 3.6%, respectively. In the dynamic adsorption experiment, when the CS content was 2.50%, the CA/CS nanofiber membrane had a good effect on the adsorption of endotoxin. Meanwhile, CA/CS nanofiber membrane also has good blood compatibility. Therefore, the CA/CS nanofiber membrane is potentially valuable in blood purification.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yan Jiang,Mengmeng Yang,Liyun Cheng,Lu Xiao,Xinyi Wang,Ruixuan Liu,Yiyan Wu,Shuangfei Wang,Xiuyu Liu
The integration of lignocellulosic nanomaterials into energy management applications possesses enormous technical appeals catering to high-tech and low-carbon era. Nature has designed hierarchical and heterogeneous lignocellulose microstructure, which can be harnessed for desirable dielectric behaviors towards specific applications. Here, we make the first attempt to boost the tribopositivity of 2D self-assembly (i.e., nanopaper) of cellulose nanofibrils by leveraging the inherent functionality of their hemicellulose phase. In comparison to conventional nanopapers assembled from TEMPO-oxidized/enzymatic cellulose nanofibrils with significantly lower hemicellulose content (4.6/12.2 vs. 20.3 wt%), the as-prepared hemicellulose-rich nanopaper exhibits ~2-fold higher electron-donating capability, which in turn generates ~1.5-fold higher triboelectric nanogenerator (TENG) output when paired with given tribonegative materials. We provide multiscale insights into the boosted tribopositivity of nanopaper by hemicellulose phase arising from its unique molecular structure and micro-distribution pattern. Furthermore, amorphous hemicellulose phase can be readily molecularly designed, e.g., aminosilanization, which further enhances the tribopositivity of nanopaper towards self-powered applications requiring high energy density. Besides, the hemicellulose-rich nanopaper is highly writable, mechanically strong, and optically transparent, serving as a desired structural material with favorable programmability for various TENG-based sensing, encryption and wearable devices.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Mengxiang Zhu,Daofa Ying,Huaran Zhang,Xiaojuan Xu,Chunyu Chang
Biodegradable cellulose films have high mechanical strength, excellent flexibility, and good transparency, which are potential candidate materials to replace petroleum-based packaging materials and disposable products. However, the poor hydrophobicity of cellulose films seriously limits their practical application. Herein, self-healing hydrophobic films were fabricated by incorporating natural wax into cellulose matrix. The effects of types of natural waxes, wax content, and annealing temperature on the performances of films were systematically investigated. The resultant films exhibited good hydrophobicity (water contact angle: ∼120°), and high tensile strength (>120 MPa), which could be completely biodegraded in natural soil (within 81 days). Importantly, the self-healing of hydrophobic films could be achieved by releasing wax from inside to surface of cellulose matrix during the annealing process. This work demonstrated a facile strategy for designing and developing hydrophobic and self-healable cellulose-based materials for packaging materials to replace petrochemical plastics, which is conducive to alleviate environmental problems caused by nondegradable plastic pollution.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 6
·
IF 1.866
Yuan Yu,Qing-Yun Wu,Hong-Qing Liang,Lin Gu,Zhi-Kang Xu
A series of cellulose triacetate (CTA) membranes were prepared via thermally induced phase separation (TIPS) process with dimethyl sulfone (DMSO2) and polyethylene glycol (PEG400) as a crystallizable diluent and an additive, respectively. The phase separation behavior of CTA/DMSO2/PEG400 ternary system was investigated in detail by optical microscopy, differential scanning calorimetry and wide angle X-ray diffraction. This ternary system dynamically undergoes solid-solid phase separation and thus the CTA membranes possess cellular, lacy, plate-, or even ellipse-shaped pores. However, we can modulate the pore structure, porosity, water flux, and mechanical properties of the membranes by varying polymer concentration, composition of the mixed diluent, and cooling condition. Due to the intrinsic hydrophilicity, the prepared CTA membranes have better antifouling property than polysulfone membranes. These porous membranes were used as supports to fabricate thin-film composite forward osmosis (FO) membranes, which show good water permeability and selectivity. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44454.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jie Zhuang,Wenya Zhang,Li Lang,Sirui Tan,Guangming Cai,Xin Wang,Deshan Cheng
Conductive hydrogels have shown significant potential in wearable sensors and energy harvesting due to their distinctive conductive network and excellent flexibility. In this work, a conductive CNF/PAM/PANI (CPP) hydrogel with excellent performance as wearable sensors and supercapacitor was successfully prepared by free radical polymerization, multiple hydrogen bonding and the combination of ionic/electronic dual-conductive network. The incorporation of Li + has modulated the interaction between the cross-linked networks, endowing the hydrogel with excellent tensile properties (1200 %) and high tensile strength (119 kPa). The synergistic effect of Li + ion conduction sites and the polyaniline conjugated π-electron system has greatly enhanced the conductivity. This ionic/electronic dual-conductive hydrogel exhibited high sensitivity to tensile and compressive stress, thus the as-fabricated sensors possessed a high sensitivity (GF = 8.95), fast response and recovery time (250 ms and 200 ms) and a wide sensing range (400 %). In addition, the triboelectric nanogenerator based on the CPP conductive hydrogel system has a maximum power density of 69 mW/m 2 , enabling energy harvesting from human movements to power small devices and monitor joint movements. The flexible supercapacitor with CPP hydrogel as the electrolyte showed a high specific capacitance of 309.41 mF/cm 2 at a scanning speed of 0.5 mA/cm 2 , and the capacitance retention rate during charging and discharging at −20 °C was still 77 %. This novel ionic/electronic dual-conductive hydrogel offers new opportunities for developing wearable electronics and energy harvesting systems.
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