RADIATION PHYSICS AND CHEMISTRY
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2011
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IF 1.132
Ning Zhang,Jianchun Jiang,Xiangyu Li,Yajuan Tong
The changes of cellulose microstructure after being implanted by low energy N + were studied by infrared (IR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that the cellulose intramolecular and the intermolecular hydrogen bonds have broken after being implanted by N + . With the increase in implantation doses, the cellulose relative degree of crystallinity reduced gradually, when the implantation doses increased to 1500×10 14 N + cm −2 , the relative degree of crystallinity decreased 6.84% than the control sample. Furthermore, the average diameter of cellulose powder reduced gradually as well, and many tiny fragments were visible on the surface of cellulose powder.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Dong Wu,Mi Wang,Wen Yu,Gui-Gen Wang,Jiaheng Zhang
For thousands of years, wood has been utilized as a natural, abundant, and sustainable material for structural construction and furniture. To enhance its value, we have developed a simple process that can directly convert low-value wood (including cracked wood, chips, shives, and other wood residues) into high-performance all-cellulose ionogels. This process involves delignification, in situ dissolution of cellulose, and self-assembly of molecular cellulose chains. The resulting ionogel exhibits excellent properties such as high ion conductivity (∼60 mS/cm), mechanical strength (∼6 MPa), and self-healing capability (∼10 min). Notably, it also demonstrates exceptional freeze tolerance, withstanding temperatures as low as −50 °C while maintaining high ion conductivity (∼6.4 mS/cm). The ionogel is a versatile substrate for flexible electronic circuits. We have developed a sensor utilizing this ionogel that is breathable, flexible, and highly responsive to temperature, humidity, and strain. Furthermore, we have used it as a gel electrolyte to create supercapacitors with exceptional performance even in low-temperature conditions. The ionic liquid can be reused, with an all-cellulose framework that breaks down naturally in moist soil within 15 days. This sustainable method of producing high-performance ionogels from low-value wood has immense potential in shaping the next generation of soft, intelligent devices.
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CARBOHYDRATE POLYMERS
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2012
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IF 3.628
Haiping Li,Renfu Chen,Xiaomei Lu,Wanguo Hou
Rheological properties of aqueous solution containing xanthan gum (XG) and cationic cellulose JR400 were investigated at different composition ratio, shear rate, pH and electrolyte concentrations. It was found that the mixing of XG and JR400 can induce a viscosity-increasing effect for the mixed solution. As the concentration fraction ( f JR ) of JR400 in the mixed solution increases from 0 to 0.40 with the total polymer concentration ( c t ) of 1%, the solution transforms from an elastic fluid into a viscoelastic one, while as f JR decreases from 1 to 0.78, the solution transforms from a viscous fluid into a viscoelastic one. At pH 5–10, both the viscosity and elasticity of XG/JR400 mixture ( f JR = 0.15) are independent of pH and the viscosity-increasing effect is obvious. Outside this pH range, the viscosity, elasticity and viscosity-increasing effect of the mixture decrease. The increase of added NaCl concentration and shear rate can induce the decrease of viscosity, elasticity and viscosity-increasing effect of the XG/JR400 mixture.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2012
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IF 2.823
Yanzhu Guo,Xiaohui Wang,Xuancai Shu,Zuguang Shen,Run-Cang Sun
A series of amiphiphilic cellulose-based graft copolymers (MCC-g-PLA) with various molecular factors were synthesized in ionic liquid BmimCl and characterized by FT-IR, 1H NMR, 13C NMR, XRD, and TGA. Their solubility in a variety of solvents was compared. The prepared MCC-g-PLA copolymers can self-assemble into spherical nanomicelles (10–50 nm) in aqueous solution. The self-assembly behaviors of the MCC-g-PLA copolymers were systematically investigated by fluorescence probe. Furthermore, the hydrophobic antitumor drug paclitaxel (PTX) was successfully encapsulated into the MCC-g-PLA micelles. The drug encapsulation efficiency and loading content were found to be as high as 89.30% (w/w) and 4.97%, respectively. Results in this study not only suggest a promising cellulose-based antitumor drug carrier but also provide information for property-directed synthesis of the cellulose graft PLA copolymers.
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Research
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2024
·
IF 8.5
Qian Long,Geyuan Jiang,Jianfei Zhou,Dawei Zhao,Haipeng Yu
Achieving rubber-like stretchability in cellulose ionogels presents a substantial challenge due to the intrinsically extended chain configuration of cellulose. Inspired by the molecular configuration of natural rubber, we address this challenge by using cyanoethyl as a substitute for 1.5 hydroxyl on the D-glucose unit of cellulose. This strategy innovatively triggers the transformation of cellulose molecules into a coiled chain configuration, facilitating the creation of an ultra-stretchable ionogel free from any petrochemical polymers. The resultant ionogel demonstrates mechanical ductility comparable to that of a rubber band, achieving an elongation strain of nearly 1,000% while maintaining a tensile strength of up to 1.8 MPa and exhibiting a biomodulus akin to that of human skin, recorded at 63 kPa. Additionally, this stretchable ionogel presents skin-like self-healing behavior, favorable biocompatibility, and noteworthy thermoelectric properties, highlighted by a Seebeck coefficient of approximately 68 mV K−1. This study delineates a feasible molecular approach for developing stretchable ionogels from biomass resources, potentially revolutionizing self-powered stretchable electronics for integration with human tissues and skin.
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CARBOHYDRATE POLYMERS
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2010
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IF 3.167
Xue Mao,Bin Ding,Moran Wang,Yanbing Yin
In this study, a novel nanocomposite multilayers was deposited on the electrospun nanofibrous mats by an electrostatic layer-by-layer (LBL) self-assembly technique. The positively charged water-insoluble 2,9,16,23-tetraaminophthalocyanine copper (CuTaPc) and the negatively charged water-soluble poly(acrylic acid) (PAA) were alternately deposited on the surface of negatively charged nanofibrous cellulose mats. The cationic CuTaPc was synthesized and characterized by UV–Vis and Fourier transform infrared (FT-IR) spectroscopy. The template nanofibrous cellulose mats were obtained from the alkaline hydrolysis of electrospun nanofibrous cellulose acetate mats. The resultant nanofibrous mats were characterized by scanning electron microscopy (SEM) and FT-IR spectroscopy. The SEM images showed that the composite LBL structured films were homogeneously deposited on the surface of the nanofibers . The diameters of nanofibers increased with the number of deposition bilayers . The average thickness of each CuTaPc/PAA bilayer is about 10 nm. Additionally, the FT-IR spectra results also indicated that the CuTaPc and PAA were coated on the nanofibrous cellulose mats.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Bo Wang,Meiqing Fan,Xin Zhang,Yan Li,Xu Zeng,Bo Ren,Hong Zhang,Hua Liu,Yue Cao,Xiaodong Yang
Recently, rapid advancements in nanotechnology and materials science have facilitated the expanding application of antibacterial materials across various domains. This study presented 3D antibacterial graphene composite aerogels fabricated via a hydrothermal process using dopamine-grafted carboxymethyl cellulose (DOPA-CMC), ethylenediamine (EDA), and graphene oxide (GO) with negligible volume shrinkage, followed by decoration with AgNPs. The incorporation of reactants effectively converted GO to reduced graphene, facilitating the self-assembly of the latter into three-dimensional structures without shrinkage, occurring at a low temperature of 90 °C and within a short duration of 12 h, ultimately improving energy efficiency and enhancing safety. Transmission and scanning electron microscopy revealed that AgNPs were synthesized into near-spherical shapes with homogeneous distribution and uniform diameters ranging from 10 to 25 nm, attributed to the 3D graphene aerogel matrix, which enhanced the immobilization and inhibited the aggregation of AgNPs. The antibacterial activity of the DCErGO/AgNPs aerogel was evaluated againstEscherichia coli and Staphylococcus aureus, thereby suggesting that the aerogel exhibited a concentration-dependent antibacterial effect, with the DCErGO/AgNPs-0.5 composite aerogel demonstrating significant antibacterial efficacy due to the efficient dispersion of AgNPs. DCErGO/AgNPs aerogels possess broad application potential in healthcare and water treatment and present sustainable approaches for the functionalization and expanded utilization of graphene-based materials.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Jiazhi Han,Mingjie Chen,Huiming Liu,Dandan Zhang,Qing-shan Shi,Xiaobao Xie,Yanzhu Guo
The investigation of environmentally friendly and sustainable replacement materials is consistently prompted by the mounting environmental concern over plastics derived from petrochemicals. Compared with fossil oil derived chemicals and materials, cellulose is more readily available, less expensive, and biodegradable. Herein, all-cellulose composite films with excellent biodegradability and antimicrobial activities were prepared for sustainable food package. The all-cellulose films were prepared by a simple solution cast method of amino cellulose and carboxymethyl cellulose mixture. Rheological studies suggest typical non-Newtonian and shear thinning behavior of the all-cellulose solution associated with strong intermolecular electrostatic interactions. Such composite results in package films with amorphous structure, and uniform, dense and smooth morphology. Properties explorations indicated that the all-cellulose composites films exhibited better mechanical properties, water vapor and oxygen barrier properties than conventional synthetic plastic packages. Besides, the all-cellulose films showed excellent antimicrobial activity, and biodegradability. When applied as shrimp package, the all-cellulose composite films effectively extended shelf-life of shrimp by inhibition of microbial and oxidative deterioration of shrimp meat. This study provides a feasible approach to syntheze biodegradable and antimicrobial functional food package from cellulose in replacing of traditional synthetic plastic films.
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POLYMER ENGINEERING AND SCIENCE
·
2011
·Vol. 51
·期 12
·2417-2424
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IF 1.296
Yiming Zhou,Shiyu Fu,Hao Liu,Shaoping Yang,Huaiyu Zhan
Superadsorbent cellulose-graft-acrylic acid (C-g-AA) hydrogels were successfully prepared via free radical polymerization in phosphoric acid solution. Phosphoric acid solution provides a homogeneous reaction system. The C-g-AA hydrogels have a porous network inner structure with cellulose as the backbone. The introduced carboxyl groups enable the C-g-AA hydrogels with good swelling property (swelling ratio 7327%) and excellent MB adsorption capacity (equilibrium adsorption amount 2197 mg g −1 ). The dynamic swelling behaviors of the hydrogels were tested, water intake of hydrogels followed a non-Fickian type diffusion. The effects of mole ratio of AA to cellulose, the pH of adsorption medium and the initial MB concentration on dye adsorption capacity of hydrogels were investigated. The adsorption isotherm and kinetics fit the Langmuir model and the Pseudo-second-order model well, respectively. Desorption was carried out in weak acid solution and 70% MB could be removed, suggesting the C-g-AA hydrogels had the potential for reuse. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers
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FIBERS AND POLYMERS
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2017
·Vol. 18
·期 7
·1235-1242
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IF 1.113
Weng Rengui,Chen Lihui,Xiao He,Huang Fang,Lin Shan,Cao Shilin,Huang Liulian
Bamboo cellulose (BC) is hydrophilic, biodegradable and inexhaustible. The bamboo cellulose membrane (BCM) is one of the best materials to replace petroleum-based polymer film for water purification. In this study, the N-methylmorpholine-N-oxide (NMMO) was used as a solvent to dissolve cellulose 6 wt.%, and regenerated cellulose membrane was prepared by phase inversion. A new kind of cellulose nanofiltration membrane (BC-NFM) was obtained by the hydrolysis and carboxymethylation of dense cellulose membrane (BCM). The modification was carried out through hydrolysis followed by carboxymethylation. The BC-NFM was characterized by XRD, FT-IR, SEM and thermal analysis. BC-NFM performance evaluation instrument were used to evaluate retention rate and water flux of nanofiltration membrane. BCM was immersed in 1 mol/ l NaOH and 3 wt/v.% chloroacetic acid solution to obtain BC-NFM. By calculating, pore size of nanofiltration membrane was 0.63 nm. With a pressure of 0.5 MPa, the water flux of nanofiltration membrane for Na 2 SO 4 solution was 10.32 l /m 2 h, and the retention rate was 68.4 %. The water flux for NaCl solution was 13.12 l /m 2 h, and the retention rate was 34.9 %. And the retention rates were 93.0 % and 98.9 % for methyl orange and methyl blue, respectively. The stability of the nanofiltration membrane was measured by the thermal analyzer, following the order of BC>BCM>BC-NFM. The prepared cellulose nanofiltration membrane exhibited good stability in water treatment process, and can be used to remove organic compounds in aqueous solutions.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Anning Song,Yanglin Wu,Chunwei Li
Pork is widely consumed worldwide, and many consumers now utilize sensory evaluation techniques to determine the freshness of pork when buying it. A color-changing ink label utilizing bromocresol purple (BCP) and N-hydroxyphthalimide (NHPI) had been created to help consumers better and more rapidly determine the freshness of pork while it is stored. The ink was easy to prepare and could be readily transferred to A4 paper using screen printing technology. This study delved deeper into the impact of hydroxyethyl cellulose (HEC) on the functional properties of inks to enhance printing performance. The experiment demonstrated that a 1 % mass fraction of HEC improved thixotropy and facilitated the even distribution of ink on A4 paper, as confirmed by scanning electron microscopy. Screen-printed labels with varying concentrations displayed distinct color change rates when stored at different temperatures, indicating their capability to assess pork freshness. FT-IR, laboratory, and stability tests verified the ink's exceptional color change capabilities and printing attributes. An analysis using the Arrhenius equation revealed a substantial synergistic effect between BCP and NHPI, resulting in improved sensitivity and accuracy of the ink. This study offers a practical and feasible method to monitor the storage quality of pork effectively.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianhua Li,Senyan Wang,Bing Chen,Guotao Pan,Guoge Zhang,Zhao-Bin Ding,Yan Liu
In this work, by integrating TiO2 nanoparticles and sodium carboxymethyl cellulose (CMC) binder, a green bifunctional TiO2 nanostructured coating (T-SCMC-vac.) directly coupled with 304SS was designed under vacuum thermal treatment, aiming to achieve methyl orange degradation and metal anticorrosion. The T-SCMC-vac. nanostructured coating exhibited a reaction constant 1.7 times higher for degrading methyl orange compared with its counterpart in the simulated seawater environment, demonstrating good photocatalytic performance. Simultaneously, T-SCMC-vac. provided effective photocathodic protection to 304SS. The open circuit potential negatively shifted to −500 mV (vs Ag/AgCl), and the photoresponse current and corrosion current densities reached approximately 10 μA cm–2. Furthermore, the nanostructured coating showed good stability, as evidenced by 98% retention in photocatalytic capability after five cycles and by 14 h long-term photocathodic protection. The experimental results and theoretical calculations suggest that the enhanced performance can be attributed to the chemical interaction between TiO2 nanoparticles and CMC via C–O–Ti bonds, which significantly facilitated photogenerated carrier transport and aligned the potential positions of TiO2, reactive oxygen species, and 304SS. Our findings provide a facile strategy for designing green bifunctional TiO2 nanostructured coatings on ocean-based facilities with seawater pollutant degradation and metal anticorrosion properties.
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