JOURNAL OF MATERIALS SCIENCE
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2025
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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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DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
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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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DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
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2025
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IF 2.6
Baoxiang Chai,Qiaoli Niu,Junhao Xiong,Jun Yang,Yuqing Chen,Wenjin Zeng,Xinwen Peng,Tao Yang,Ruidong Xia
Perovskite light-emitting diodes (PeLEDs) have exhibited tremendous potential for commercial applications in the fields of displays, lighting, and information technology. For achieving pure red electroluminescence, quasi-two-dimensional (Q-2D) perovskite based on Br/I mixed halides has been commonly used. However, during the in-situ crystallization process of perovskite films via low-temperature solution methods, the complexity of coordination among various ions leads to the presence of uncoordinated ions, resulting in numerous defects in the perovskite films. These defects significantly impact the performance and stability of PeLEDs. In this work, hydroxyethyl cellulose (HEC) was incorporated into the hole transport layer (HTL) to passivate the defects in perovskite films. Experimental results showed that the hydroxyl groups in HEC interacted with Pb 2+ /K + /PEA + ions in the perovskite, contributing to the passivation of defects. Simultaneously, the addition of HEC inhibited the low-dimensional phases (n=1, 2) and enhanced the high-dimensional phase (n=3) in the Q-2D perovskite films. The optimized distribution of n phases was favorable for the radiative recombination. After the introduction of HEC, the external quantum efficiency (EQE) of pure red PeLEDs at 636 nm showed a significant improvement compared to the control device, from 5.31% to 6.82%. This strategy provides an excellent alterative to improve the electroluminescent efficiency of red PeLEDs.
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CARBOHYDRATE POLYMERS
·
2025
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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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PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2013
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IF 2.404
Yi Zheng,Jingxuan Yang,Weili Zheng,Xiao Wang,Cao Xiang,Lian Tang,Wen Zhang,Shiyan Chen,Huaping Wang
Flexible magnetic membrane based on bacterial cellulose (BC) was successfully prepared by in-situ synthesis of the Fe 3 O 4 nanoparticles under different conditions and its properties were characterized. The results demonstrated that the Fe 3 O 4 nanoparticles coated with PEG were well homogeneously dispersed in the BC matrix under ultrasonic irradiation with the saturation magnetization of 40.58 emu/g. Besides that, the membranes exhibited the striking flexibility and mechanical properties. This study provided a green and facile method to inhibit magnetic nanoparticle aggregation without compromising the mechanical properties of the nanocomposites. Magnetically responsive BC membrane would have potential applications in electronic actuators, information storage, electromagnetic shielding coating and anti-counterfeit.
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DOI
PubMed
高影响因子
GREEN CHEMISTRY
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2025
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IF 9.2
Xianda Li,Zhongping Shao,Haozhe Shan,Li Liu
Cellulose utilization has been seriously hindered by the formation of humins, whereas humins structure remains challenging since unconverted cellulose and humins exist as solid mixture. In this work, we developed a novel strategy to extract humins from unconverted cellulose and disclosed the structural evolution process of cellulose-derived humins for the first time. The key intermediate of levoglucosan was successfully captured and identified, which significantly favors the formation of anhydro-sugars followed by polymerization due to the stability. By means of comprehensive HPLC-MS/MS, FT-IR, MALDI-TOF and SEM characterizations, it was proposed that multiple elementary reactions were involved in the formation of cellulose-derived humins, including cellulose depolymerization, etherification, esterification, aldol condensation, dehydration and thermal oxidation. In the early stage, cellulose depolymerization results in glucose and levoglucosan (LG), which undertake etherification to form the early humins via small molecule mechanism, accompanied by esterification and dehydration. In the later stage, gluco-oligosaccharides esp. with LG end from cellulose depolymerization undergo etherification via oligomer mechanism. Meanwhile, etherification of HMF and aldol condensation with LA take place prominently, together with dehydration and oxidation, resulting in the enhancement of C=C and C=O conjugation.
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高影响因子
BIORESOURCE TECHNOLOGY
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2015
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IF 4.494
Binzhe Sun,Lian Duan,Gege Peng,Xiaoxia Li,Aihua Xu
To improve the production of glucose from cellulose, a simple and effective route was developed. This process uses a combination of a step of cellulose dissolution in aqueous NaOH/urea solution and then regeneration with water, followed by an acid hydrolysis step under microwave irradiation. The method is effective to obtain glucose from α-cellulose, microcrystalline cellulose, filter paper, ramie fiber and absorbent cotton. Increased with the acid concentration the glucose yield from hydrogel hydrolysis increased from 0.42% to 44.6% at 160 °C for 10 min. Moreover, the ozone treatment of cellulose in NaOH/urea solution before regeneration significantly enhanced the hydrolysis efficiency with a glucose yield of 59.1%. It is believed that the chains in cellulose hydrogel are relatively free approached, making that the acids easily access the β-glycosidic bonds.
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PubMed
高影响因子
Journal of Environmental Sciences
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2013
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IF 1.773
Xiaolin Yu,Shengrui Tong,Maofa Ge,Lingyan Wu,Junchao Zuo,Changyan Cao,Weiguo Song
A novel nanoadsorbent for the removal of heavy metal ions is reported. Cotton was first hydrolyzed to obtain cellulose nanocrystals (CNCs). CNCs were then chemically modified with succinic anhydride to obtain SCNCs. The sodic nanoadsorbent (NaSCNCs) was further prepared by treatment of SCNCs with saturated NaHCO 3 aqueous solution. Batch experiments were carried out with SCNCs and NaSCNCs for the removal of Pb 2+ and Cd 2+ . The effects of contact time, pH, initial adsorption concentration, coexisting ions and the regeneration performance were investigated. Kinetic studies showed that the adsorption equilibrium time of Pb 2+ and Cd 2+ was reached within 150 min on SCNCs and 5 min on NaSCNCs. The adsorption capacities of Pb 2+ and Cd 2+ on SCNCs and NaSCNCs increased with increasing pH. The adsorption isotherm was well fitted by the Langmuir model. The maximum adsorption capacities of SCNCs and NaSCNCs for Pb 2+ and Cd 2+ were 367.6 mg/g, 259.7 mg/g and 465.1 mg/g, 344.8 mg/g, respectively. SCNCs and NaSCNCs showed high selectivity and interference resistance from coexisting ions for the adsorption of Pb 2+ . NaSCNCs could be efficiently regenerated with a mild saturated NaCl solution with no loss of capacity after two recycles. The adsorption mechanisms of SCNCs and NaSCNCs were discussed.
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DOI
高影响因子
FOOD HYDROCOLLOIDS
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2021
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IF 9.147
Tao Ma,Ranran Cui,Shuyu Lu,Xinna Hu,Bo Xu,Yi Song,Xiaosong Hu
A route for creating edible 3D materials is the use of highly concentrated oil-in-water emulsions. In this study, a high internal phase Pickering emulsion (HIPPE) was prepared by centrifuging pre-emulsions at different CNC concentrations. We found that HIPPE with an internal phase volume fraction of 80% can be obtained at 0.5 wt% CNC concentration and 4000 g centrifugal force. The resultant HIPPE exhibited excellent storage stability, apparent shear-thinning behavior, and high solid viscoelasticity, and these properties were successfully applied to 3D printing. We further investigated the effects of pH and ionic strength on the formation and 3D printability of HIPPE. It was shown that HIPPEs can be successfully prepared under pH conditions ranging from 5 to 8, and ionic strength between 25 and 200 mM NaCl. Furthermore, we demonstrated that HIPPE was able to 3D-print selected shapes with high resolution and shape fidelity at pH 7 and 50 mM NaCl. This printed material opens new possibilities for future food manufacturing, nutrition delivery systems, and biomedical tissue engineering.
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高影响因子
CARBOHYDRATE POLYMERS
·
2022
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IF 10.723
Kuang Li,Shicun Jin,Fudong Zhang,Ying Zhou,Guodong Zeng,Jiongjiong Li,Sheldon Q. Shi,Jianzhang Li
Inspired by the phenol-amine chemistry and biomineralization of insect cuticles , we developed a green and facile strategy for preparing a bio-adhesive with excellent adhesion properties, mildew resistance, and antibacterial activity . This biomimetic strategy incorporates functional catechol-modified ε -polylysine and vanillin via grafting and Schiff base reactions. The biomineralized cellulose nanocrystals were prepared using a cellulose nanocrystal bio-template by regulating the in-situ biomineralization of inorganic nanoparticles , thereby building an optimized organic–inorganic mineralization framework in the polymer. The bonding strength of composite adhesive was significantly improved by multiple cross-linking networks through sacrificial hydrogen bonds , electrostatic interactions , and dynamic covalent bonds . The adhesion strength of the composite adhesive reached 1.13 MPa, which was 151% higher than the pristine adhesive. As a result of the synergistic effect of the catechol component, cationic ε -polylysine, and aldehyde group, the bio-adhesive also exhibited favorable anti-mildew and anti-bacterial properties.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2012
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IF 3.628
Xiaoyun Qiu,Xueqin Ren,Shuwen Hu
An independently temperature- and pH-responsive membrane was developed by simultaneously grafting poly( N -isopropylacryamide) (PNIPAAm) and poly[(2-(diethylamino)ethyl methacrylate] (PDEAEMA) from different sides of a crosslinked cellulose membrane. The synthesis was simplified by using surface-initiated activators regenerated by electron transfer for atom-transfer radical polymerization in a diffusion device. The grafted membrane was heterostructured. The grafted polymer layer thickness was linearly related to reaction time. The wettabilities of the double-membrane sides responded individually and reversibly to temperature and pH. The surface grafted with PNIPAAm shifted from hydrophilicity to hydrophobicity above the lower critical solution temperature. The PDEAEMA side was hydrophilic in acidic aqueous solution and hydrophobic under basic conditions. This dual-response cellulose membrane has potential applications in water treatment, separations, and other membrane applications.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
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IF 5.546
Xinyu Lu,Han Que,Xiaoli Gu
Sodium lignin sulfonate (SLS) containing α -cellulose film with high compatibility was fabricated via crosslinking process using water as green solvent. FTIR analysis showed that intramolecular/intermolecular hydrogen bonds were formed after water treatment. In addition, physicochemical and antibacterial properties were analyzed comprehensively and results presented that the crosslinked film showed stronger tensile strength, higher water and heat resistance as compared to the pure sample. Better UV blocking capacity and antibacterial performance were derived from the addition of SLS . After water treatment, antibacterial performance was deteriorated with the consumption of sulfonate groups to form intermolecular hydrogen bonds.
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