INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhiguo Wang,Sijie Wang,Han Zhong,Hanwen Wang,Boyi Zhang,Xiaoping Rao,Jianchun Jiang
Currently, moisture-electric generators (MEGs), which can convert the energy of ubiquitous moisture into electricity, have become a trend. In this work, biomass-based generator (CMEG) with double gradient structures was prepared by two-step directed freeze-drying and Ca 2+ induced crosslinking reaction using cellulose nanofibrils (CNF), sodium alginate (SA) and calcium chloride. The composite aerogel with Ca 2+ ion concentration gradient structure was constructed by using the CNF/SA bilayer aerogel with the gradient structure of oxygen functional group as the template. The introduction of Ca 2+ ions not only further stabilized the structure of the aerogel, but also endowed the asymmetric hygroscopic between the upper and lower layers of the aerogel, resulting in a built-in water gradient. In addition, the ion gradient difference inside the aerogel was significantly enhanced by introducing an active metal electrode. Based on the above design, the CMEG exhibited leading maximum power density (128.04 μW·cm −2 ), wide temperature range (273–353 K) and long duration (110 h ) by adjusting the operating environment. And in addition to easily lighting multiple light-emitting diodes (LEDs), CMEGs could also satisfy the power supply needs of various devices through different series-parallel connection designs. More importantly, it was compatible for applications in respiratory sensing and pressure monitoring. This work provides a new strategy for the biomass-based moisture-electric generators.
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DOI
PubMed
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Liu Dongdong,Wang Jinkun,Liu Xiuming,Shu Dawu
The development of green processes for sustainable recycled dyeing is key to reducing the energy consumption and environmental harm caused by traditional textile dyeing. In this study, an easy fabrication process was used to obtain ZIF-8-modified cotton fabrics with a more uniform nanoparticle distribution. Furthermore, from the view point of green and clean dyeing and finishing, acid dyes could be adsorbed to modified cotton fabrics without consuming water, heat and discharging residual dyeing liquid, and it could also be used in batik to depict specific patterns. At the same time, the modified cotton fabrics had excellent UV protection and antibacterial effect while maintaining air and moisture permeability. During the adsorption of acid dyes, the modified fabric showed greater adsorption properties for the larger and more hydrophobic acid dye molecules during the adsorption of acid dyes,. The equilibrium adsorption capacity of the fabrics for acid red G and weak acid purple 4BNS were 6.21 mg·g-1 and 9.26 mg·g-1, respectively. The residual dyeing solution could be recycled to reduce wastewater discharge and environmental pressure. The prepared fabric had a UPF value of 44.695, indicating a good UV protection effect. The antibacterial activity of the modified fabrics was 94.11% against Escherichia coli and 94.30% against Staphylococcus aureus. This study provided a good idea for textile cleaning and dyeing. It not only increased the scope of the dyes used for dyeing cotton fabrics, but also provided a new strategy for the green and sustainable development of cellulosic fiber fabric dyeing.
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高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 5
·1713-1725
·
IF 2.2
Tan Lei,Bai Xiuzhi,Yao Rui,Fu Zengjin,Wang Jing,Wang Yicheng,Lin Tingrui,Hao Yan,Yang Hui,Yang Huimin,Sai Huazheng
The biodegradable biomass adsorbent (cellulose- g -PSS) was synthesized in LiCl/ N, N -dimethyl acetamide by the free-radical grafting polymerization reaction between sodium styrene sulfonate (SSS) and cellulose. Systematic optimization was conducted on many reaction parameters, including reaction time, monomer dosage, and reaction temperature. The grafting yield of cellulose- g -PSS was 50.16%. The chemical structures, physical, and chemical characteristics of cellulose- g -PSS were characterized by FTIR, SEM, PZC, 1 H NMR, XRD, TGA and XPS. An assessment was conducted to determine the sorption of Ce (III) on cellulose- g -PSS by changing the contact time, adsorbent dosage, pH, initial Ce (III) concentration, and NaCl concentration. The process of adsorption rapidly reached a state of equilibrium within a time frame of 25 min and was well explained using pseudo-second-order kinetic and Langmuir isotherm model. The maximum adsorption capacity for Ce (III) obtained from the Langmuir isotherm model was 84.80 mg·g −1 . The impact of NaCl concentration on the sorption of Ce (III) and XPS analysis showed that Ce (III) ions were adsorbed onto cellulose- g -PSS through ion-exchange mechanism. As a whole, cellulose- g -PSS exhibited great potential in rare earth wastewater treatment.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2011
·
IF 4.365
Shurong Wang,Xiujuan Guo,Tao Liang,Yan Zhou,Zhongyang Luo
The mechanism of fast pyrolysis of cellulose has been studied by using an analytical pyrolyzer coupled with a gas chromatography–mass spectrometry set-up (Py-GC/MS). The results showed that the main products comprised pyrans such as levoglucosan and levoglucosenone, furans such as furfural and 5-hydroxymethyl furfural, and linear small molecular chemicals such as acetaldehyde and 1-hydroxy-2-propanone. The compositions of products from fast pyrolysis of cellubiose and glucose were similar to that from cellulose, but with higher furan contents and lower pyran contents. Based on the experimental results, density functional theory (DFT) studies were carried out to deduce the pyrolysis mechanism of cellulose. The results showed the formation of 5-hydroxymethyl furfural from d -glucopyranose unit to be easier than the formation of levoglucosan, in agreement with the experimental results. The deduced mechanism of reaction pathways in cellulose pyrolysis provides insight into the pyrolysis behavior of cellulose and allows modification of previously proposed related mechanisms.
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PubMed
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 6
·3645-3656
·
IF 4.9
Hu Guizhen,Ning Juan,Wu Tian,Li Yuanjie,Nie Yamin,Lei Jiandu,Zhou Yanmei
Cellulose nanocrystals (CNCs) and polydopamine (PDA) have shown great application potential in the biomedical field due to their excellent biocompatibility. Using PDA@CNC as a carrier to construct functional nanocomposites for targeted fluorescence imaging of tumor cells and effective cancer treatment can expand the applications of CNCs in tumor diagnosis and treatment. Here, we conveniently modified microRNA-21 inhibitors (miRNAi) on PDA@CNC to construct a multifunctional nanocomposite (FAM-miRNAi@PDA@CNC) for achieving in situ fluorescence imaging of tumor biomarkers and photothermal effects to induce death of breast cancer cells. The overexpressed miRNA-21 in breast cancer cells hybridizes with FAM-miRNAi, triggering green fluorescence of FAM to recognize breast cancer cells. The rod-shaped morphology of FAM-miRNAi@PDA@CNC can effectively promote the endocytosis of FAM-miRNAi@PDA@CNC by the cell membrane. In addition, CNCs can stabilize the photothermal performance of PDA, and the photothermal conversion efficiency of PDA@CNC reached up to 61.66%, which will help FAM-miRNAi@PDA@CNC to achieve 70% apoptosis rate of breast cancer cells under 808 nm laser irradiation. The design of FAM-miRNAi@PDA@CNC provides a valuable pathway for CNCs utilization in biomedicine and accurate diagnosis and treatment of breast cancer.
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高影响因子
Small
·
2025
·Vol. 21
·期 8
·2407438
·
IF 12.1
Xunhong Gu,Wanhua Wang,Jinyu Kang,Xinrui Dong,Peilin Guan,Bo Li
Degradable and cost-effective cellulose fiber-based materials are ideal substitutes for traditional plastics. However, organic additives used to enhance water and oil resistance often contain toxic substances that may migrate into food, posing health risks. In this study, inspired by tree structures, lignin-containing cellulose nanofibers (LCNFs) are used to form a “crown-roots” structure to enhance the water, oil, and gas resistance, as well as mechanical performance of composites. Mechanically fibrillated LCNFs (M-LCNFs), representing the tree roots, are blended with bamboo pulp and bagasse pulp to prepare cellulose fiber substrate. LCNFs films, representing the crown, are produced via a sol–gel method to improve the substrate's barrier properties. The LCNFs gel, representing the trunk, bonds the films to the substrate via hydrogen bond. The resulting material shows exceptional behaviors including 1) excellent water and oil resistance (Cobb value and WVTR decreased by 75.27% and 16.43% compared to the substrate, with a maximum kit value of 12), 2) outstanding mechanical performance (tensile index is 103.19 N·m g −1 ), and 3) good natural degradability. This material holds significant potential for industries with high safety standards, such as food, cosmetics, and medicine.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yanan Huang,Jihai Cai,Zhengguo Wu,Yuxuan Kuang,Jiwen Luo
Although silver nanoparticles (AgNPs) have the effective antibacterial property, its application was limited by the accumulated toxicity. It was necessary to develop a carrier material to immobilize AgNPs. In this study, for the first time, thiol-modified carbon spheres (TMCS) were synthesized by hydrothermal method, which was used to immobilize AgNPs. It effectively solved the problem of cumulative toxicity. Thiol-modified carbon spheres loaded with silver nanoparticles (TMCS@Ag) were then blended with pulp fibers to prepare antimicrobial composite paper. The addition of TMCS@Ag changes the internal microstructure of the paper, improves its mechanical properties and thermal stability, and at the same time reduces solubility and swelling, which is conducive to use and preservation. It is worth noting that due to the immobilization of TMCS and the wrapping effect of paper fibers, the cumulative release of Ag + in the composite paper reached only 5.15 % on the 14th day, and the cell survival rate was >95 % after co-culture, which proves that the release rate was controlled and the cumulative toxicity of AgNPs was effectively reduced. Nevertheless, the composite paper still has good antimicrobial properties against E. coli and S. aureus . Therefore, this study provides a new strategy for the safe application of antibacterial paper in food preservation, medical and health fields.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Shangjie Hu,Yingju Miao,Yiyi Guo,Hong Wu,Yingchun Miao
Here, five different amines (MEA, DETA, TEPA, PEI, and PEPA) were immobilized onto a mesoporous cellulose aerogels (CAs) support prepared from old corrugated containers (OCCs) using the impregnation method, and the thermal stabilities, pore structures, and CO 2 adsorption capacities of the resulting amine loaded materials were investigated. The results showed that the thermal stabilities and pore textures of the materials decreased relative to the unmodified CAs support. Additionally, the addition of high molecular weight amines improved the thermal stability of the resulting materials, in the order of PEI>PEPA>TEPA>DETA>MEA. The adsorption capacities of the five Amine40@CAs materials tested ranged from 111.76 to 62.48 mg.g −1 and were in the order of DETA>PEI>MEA>TEPA>PEPA. Considering both thermal stability and CO 2 adsorption capacity, PEI is the most suitable for physical immobilization in the CAs support. Consequently, the sample loaded with 30 % PEI exhibits a maximum CO 2 capture capacity of 136.84 mg.g −1 material. However, a loading above 30 % results in pore blockage due to amine infiltration into the pore structure, leading to a decrease in the specific surface area and hence the CO 2 adsorption capacity. This indicates that there is a balance to be struck between amine loading and CO 2 uptake in the solid amine adsorbents using the physical impregnation method, and it is necessary to choose an appropriate method for improving the pore structure in order to maximize the amine loading and thus enhance the CO 2 capture capacity.
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高影响因子
FUEL
·
2024
·
IF 6.7
Sifan Bao,Xudong Zheng,Zihuai Xu,Biao Ji,Zhouzhou Yang,Wei Sun,Jinfeng Mei,Jian Rong,Zhongyu Li
Carbon aerogel has become a promising electrode material for CO 2 capture and capacitor due to its large specific surface area, well-developed pore structure, adjustable porosity and ultra-high specific power. However, most of the carbon-based materials suffer from poor mechanical properties, low recycling efficiency, and low adsorption capacity, making it difficult to be put into industrial applications on a large scale. Bacterial cellulose (BC) has an ultra-fine reticular structure, a modulus of elasticity that is several to more than ten times that of typical plant fibers, and high tensile strength. In this paper, BC was treated by unidirectional freeze-drying method, and the aerogels with ordered honeycomb pore structure were constructed by unidirectional growth of ice crystals, and the pyrolytic chemical properties of BC were adjusted by using (NH 4 ) 2 SO 4 , which effectively prevented the shrinkage and deformation of materials during carbonization, and successfully prepared elastic nanocarbon fiber aerogels. At the same time, the introduction of (NH 4 ) 2 SO 4 made the material realize N doping in the carbonization process, providing more adsorption sites, which was conducive to the adsorption of CO 2 . Finally, the carbon fiber nanoaerogel was modified by TEPA to further improve its adsorption selectivity for CO 2 . The prepared elastic carbon nanofiber aerogel (CBCNT) has high CO 2 adsorption performance and high selectivity, and its CO 2 capture capacity is up to 4.88 mmol/g. At the same time, its capacitance also reached 246F/g.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Liheng Zhu,Boyang Zou,Naici Bing,Huaqing Xie,Wei Yu
The issues of inherent low thermal conductivity , slow heat transport rate and easy leakage are critical challenges for accelerating solar-thermal energy harvesting and storage for organic solid-liquid phase change materials (PCMs). Aerogel carriers with thermal conductivity enhancement based on ice temple methods show favorable potential for PCMs solar thermal applications. Comparing with disordered and unidirectional freezing, bidirectional freezing can assemble efficiently in multiple dimensions and result in long-range ordered structures. In this paper, bacterial cellulose/polyvinyl alcohol/MXene aerogels were constructed by bidirectional freezing. The anisotropic PCMs composites were from vacuum impregnation PEG into aerogel networks. By controlling crystallization and growth of ice crystals through the dual temperature gradients , the PCMs composites obtained enhanced heat transfer efficiency in horizontal and vertical directions. Bidirectional aligned PCMs with PDMS wedge angle of 0° and 20° exhibit high thermal conductivity of 0.716 W m −1 K −1 and 0.768 W m −1 K −1 , which were 184% higher than that of PEG , and photothermal conversion efficiency of 55.17% and 76.91%. Remarkably, the PCMs composites with a 20° PDMS wedge angle also exhibited a high PCM loading capacity (96.3%) and a high enthalpy (157.7 J/g). The results show that bidirectional anisotropic PCMs composites have excellent overall performance and are expected to improve solar thermal application.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhiyu Huang,Aixin Tong,Tonghe Xing,Annan He,Yuxin Luo,Yu Zhang,Mengqi Wang,Sijie Qiao,Zhicheng Shi,Fengxiang Chen,Weilin Xu
Regenerated cellulose fibers has attracted increasing attention for high-grade textile raw materials and industrial textiles, but the low mechanical property caused by differences in regenerated raw materials and production levels limits its commercial application in the product diversity. Herein, we proposed a novel triple-crosslinking strategy by coupling with hydrogen bonds, chemical crosslinking, and internal mineralization from multiple pulsed vapor phase infiltration (MPI) to improve the mechanical performance of regenerated cellulose fibers. A binary solvent composed of ionic liquid (IL) and dimethyl sulfoxide (DMSO) is used to dissolve waste cotton textile and then wet spinning. Dual-crosslinking is firstly achieved by coupling glutaraldehyde (GA) and cellulose reaction. Subsequently, a metal oxide is intentionally infiltrated into inner cellulosic through MPI technology to form a third form of crosslinking, accompanied by the ultra-thin metal oxide nano-layer onto the surface of regenerated cellulose fibers. Results showed that the triple-crosslinking strategy has increased the tensile stress of the fiber by 43.57 % to 287.03 MPa. In all, triple-crosslinking strategy provides a theoretical basis and technical approach for the reinforcement of weak fibers in waste cotton recycling, which is expected to accelerate the development of the waste textile recycling industry and promote of the added-value of regenerated products.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Dekai Meng,Yunjie Ju,Ailing Xu,Yonggui Wang,Dong Wang,Yanjun Xie,Zefang Xiao,Haigang Wang
The rapid advancement of phase change material (PCM) has spurred numerous innovations, such as the use of reversible optical properties of solid–liquid phase change materials in the manufacturing of optical devices. However, these materials often exhibit poor stability and low heat storage performance. Here, a method for producing cellulose-based phase change gel (PCG) is proposed. The addition of carboxymethyl cellulose (CMC) significantly increased the tensile strength of the phase change gel postmelting, resulting in a remarkable 1131% increase compared with that of the CMC-free gels. Within this gel, poly(ethylene glycol) (PEG) is embedded as a phase change filler in a dual network cross-linked by hydroxyethyl methacrylate (HEMA) and CMC, preventing leaks and enhancing shape stability. The maximum enthalpy values for melting and solidification reach 90.6 and 88.4 J/g, respectively. The resulting gel exhibits a high degree of haze that effectively prevents glare, resulting in optical transparency changes ranging from about 25 to 78% during phase transitions. The preparation process of these phase change gels involves no toxic or harmful solvents, ensuring an environmentally friendly and straightforward approach. This expands research opportunities in phase change materials for intelligent optical devices, thermal energy management, and beyond.
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高影响因子
危险品化学品经营许可证（带存储）