DESALINATION
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2023
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IF 9.9
Qiuhui Shi,Na Zhang,Dong Wang,Jiaojiao Zhang,Yiming Li,Zhining Wang
Dye recovery and desalination efficiency in textile wastewater treatment are of great significance, but the traditional treatment technologies cannot meet these two requirements simultaneously. In this study, a novel loose NF membrane was prepared by the assembly of PEI-modified mica (PEI-mica) and cellulose nanofibers (CNFs) on hydrolyzed polyacrylonitrile (HPAN) substrate via facile vacuum filtration. The combination of PEI-mica nanosheets and CNFs constructed a thin and loose “brick-mud” structure via electrostatic attraction and hydrogen bonding. The 2D nanochannels among the stacked PEI-mica nanosheets well-tailored by CNFs allowed the transport of water molecules and salt ions while resisting dye molecules. Due to the well-designed lamellar structure along with the excellent hydrophilicity , the PEI-mica/CNFs membrane possessed high water permeability (62.18 LMH/bar) and superior dye/salt separation efficiency, with outstanding dye retentions (i.e., Coomassie Brilliant Blue R250: 99.66 %, Congo Red: 98.89 %, and Evans Blue: 98.64 %) and low salt rejections (e.g., NaCl: 3.42 % and Na 2 SO 4 : 15.63 %). Besides, the composite membrane also showed good antifouling properties and operation stability, indicating its promising potential for practical textile wastewater treatment.
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CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Yan Zhang,Qun Tang,Kangqi Huang,Zongshu Xu,Shaoxiong Feng,Heping Li,Zhiming Zou
There is a growing demand for the development of intelligent active packaging films to maintain and monitor the freshness of meat food . Herein, nano Co-based MOF (ZIF67) with ammonia-sensitive and antimicrobial functions was successfully synthesized and then integrated into cellulose acetate (CA) matrix to prepare intelligent active films. The impacts of ZIF67 incorporation on the structure, physical and functional characteristics of CA film were fully investigated. The results demonstrated that the ZIF67 nanofillers were evenly dispersed in CA matrix, resulting in remarkable improvement on tensile strength , toughness, thermal stability , UV barrier, hydrophobicity and water vapor barrier ability of CA film. Furthermore, the prepared CA/ZIF67 films exhibited superb antimicrobial and ammonia-sensitive functions. The CA/ZIF67 intelligent films turned their color from blue at beginning to brown during progressive spoilage of shrimp . These results revealed that the CA/ZIF67 films with excellent antimicrobial and ammonia-sensitive functions could be applied in intelligent active food packaging.
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PubMed
高影响因子
Small
·
2023
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IF 13.3
Feijie Wang,Suyang Wang,Yifan Liu,Tianmeng Hou,Zhen Wu,Jing Qian,Zhicheng Zhao,Liqiang Wang,Chao Jia,Shufeng Ma
Cellulose-based triboelectric nanogenerators (TENGs) have attracted widespread attention due to the low cost and environmentally friendly characteristics of cellulose. However, achieving high electrical energy output from these generators still presents significant challenges. Here, cellulose is dissolved-regenerated to form a composite aerogel with high specific surface area, in which cellulose-based composites with excellent negative triboelectric properties are developed by coupling the rich 3D network structure of the regenerated cellulose aerogel, modified barium titanate, and poly(vinylidene fluoride). The TENGs assembled from the composite materials exhibit an output voltage of 1040 V and a current of 1.165 mA at an external force of 8 N and a frequency of 4 Hz, outperforming all cellulose-based negative triboelectric materials. In addition, the nanogenerators have a stable electrical energy output capacity, with no significant property degradation in 100 000 contact-separation tests. The excellent electrical output property of the composite materials enables them to harvest energy from human movement and waterdrops, demonstrating their great application prospects in wearable devices, energy harvesting devices, self-powered sensors, and other fields.
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Advanced Healthcare Materials
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2023
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IF 10
Xiaohao Liu,Zhuyun Cai,Manman Pei,Hua Zeng,Lijuan Yang,Wentao Cao,Xuhui Zhou,Feng Chen
Bandages for daily wounds are the most common medical supplies, but there are still ingrained defects in their appearance, comfort, functions, as well as environmental pollution. Here, novel bandages based on bacterial cellulose (BC) membrane for wound monitoring and advanced wound management are developed. The BC membrane is combined with silver nanowires (AgNWs) by using vacuum filtration method to achieve transparent, ultrathin (∼7 μm), breathable (389.98-547.79 g m −2 d −1 ), and sandwich-structured BC/AgNWs bandages with superior mechanical properties (108.45-202.35 MPa), antibacterial activities against E. coli and S. aureus , biocompatibility, and conductivity (9.8 × 10 3 -2.0 × 10 5 S m −1 ). Significantly, the BC/AgNWs bandage is used in the electrical stimulation (direct current, 600 microamperes for 1 h every other day) treatment of full-thickness skin defect in rats, which obviously promotes wound healing by increasing the secretion of vascular endothelial growth factor. The BC bandage is used for monitoring wounds and achieve a high accuracy of 94.7% in classifying wound healing stages of hemostasis, inflammation, proliferation, and remodeling, by using a convolutional neural network. The outcomes of this study not only provide two BC-based bandages as multifunctional wound management, but also demonstrate a new strategy for the development of the next generation of smart bandage. This article is protected by copyright. All rights reserved
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Chongjun Huang,Meng Xiao,Hao Cui,Jiayin Wang,Yurou Cai,Yu Ke
Antibacterial sodium carboxymethyl cellulose (CMC) gels were prepared via immobilizing ZnO and/or Ag/AgCl in situ to inhibit the aggregation of nano-photocatalyst. Epichlorohydrin was used as a crosslinking agent to prepare CMC gel, simultaneously introducing chlorine-containing branch chains as Cl reservoir to deposit AgCl. The composite gels presented pH responsive swelling properties, with the minimum swelling ratio at pH 8 and pH 4 for CMC gels containing Ag/AgCl and ZnO, respectively. Zn 2+ release from the nanocomposite gels was much greater in acidic than in neutral. Photocatalytic degradation constants of methyl orange by the composite gels under sunlight were greater than UV irradiation. Ag/AgCl loaded gel showed a degradation rate of 71.3 % under sunlight for 1 h, with a rate constant approximately 10.2 times higher than ZnO loaded gel. Extract liquids with the gel content below 0.33 mg/mL were noncytotoxicity. The nanocomposite gels presented good bactericidal rate against E. coli and S. aureus under sunlight for 6 h, comparatively to those in dark for 24 h. Bacteriostatic activity of Ag/AgCl loaded gel under sunlight for 6 h was much greater than that in dark for 24 h. The biocompatible nanocomposite gels with sunlight-catalyzed antibacterial activity would broaden the application of CMC gels.
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高影响因子
CARBOHYDRATE POLYMERS
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2023
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IF 11.2
Fan Wang,Weiqi Wang,Yuqing Wang,Lili Zhang,Yoshio Okamoto,Jun Shen
Two novel cellulose and amylose derivatives bearing bulky tris(2-benzothienylformate) pendants ( Cel - 3 and Amy - 3 ) were expeditiously prepared by one-step esterification . The fluorescent sensing performance of six polysaccharide derivatives, including Cel - 3 / Amy - 3 , and other four previously prepared benzothienyl- or benzofuranyl-phenylcarbamates of cellulose and amylose ( Cel-1 / Amy-1 , Cel-2 / Amy-2 ), were carefully evaluated using eight metal ions , including Co 2+ , K + , Na + , Li + , Hg 2+ , Ni 2+ , Ca 2+ and Fe 3+ . All six derivatives exhibited excellent fluorescence quenching property to Fe 3+ ions with high sensitivity and selectivity. Especially, the limit of detection of Amy - 2 with benzofuranylphenylcarbamates for Fe 3+ was 3.0 μM, much lower than the maximum contaminant level for Fe 3+ in the drinking water . Additionally, the six bulky derivatives displayed the interesting fluorescence “turn-off” and “turn-on” observation, indicating a desirable reversibility for Fe 3+ detection. The high anti-interference ability was also observed for detection of Fe 3+ on the benzothienyl/benzofuranyl derivatives of cellulose and amylose in the combined system containing Co 2+ , K + , Na + , Li + , Hg 2+ , Ni 2+ and Ca 2+ . It suggested that the obtained polysaccharide derivatives with bulky chromophores possessed good potentials for detection of Fe 3+ as high-efficient fluorescent sensors in diverse applications. The sensing mechanism for detection of Fe 3+ was further proposed based on the Stern-Volmer plots and fluorescence titration analysis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Xiaotong Yi,Jinmei He,Xinjing Wei,Hongbin Li,Xingyuan Liu,Feng Cheng
Hydrogels for wound dressings have recently attracted considerable attention in the field of biomedical materials. Developing hydrogel dressings with multiple functions, including good antibacterial, mechanical and adhesive properties, to enhance wound regeneration is significant for clinical applications. To this end, a novel hydrogel wound dressing (PB-EPL/ [email protected] ) was developed, which was prepared by incorporating bacterial cellulose (BC) modified with tannic acid and ε-polylysine (EPL) into a PVA and borax matrix through a simple method without introducing any other chemical reagents. The hydrogel exhibited good adhesion (8.8 ± 0.2 kPa) to porcine skin, and the mechanical properties were significantly improved after adding BC. Meanwhile, it showed good inhibition against Escherichia coli , Staphylococcus aureus and Methicillin-resistant Staphylococcus aureus (84.1 ± 2.6 %, 86.0 ± 2.3 % and 80.7 ± 4.5 %) in vitro and Methicillin-resistant Staphylococcus aureus (MRSA) in vivo without the use of antibiotics, ensuring that the process of wound repair with a sterile environment. The hydrogel also presented good cytocompatibility and biocompatibility and could achieve hemostasis within 120 s. The in vivo experiments indicated that hydrogel could not only instantly complete hemostasis of the injured liver models but also obviously promote wound healing in a full-thickness skin. Furthermore, the hydrogel accelerated wound healing process by reducing inflammation promoting collagen deposition compared with commercial Tegaderm™ films. Therefore, the hydrogel is a promising high-end dressing material for wound hemostasis and repair for to enhance the wound healing.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
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IF 8.2
Li Zhong,Yuhui Zhang,Fei Liu,Luzhen Wang,Qian Feng,Chuchu Chen,Zhaoyang Xu
Conductive hydrogels are considered one of the most promising materials for preparing flexible sensors due to their flexible and extensible properties. However, conventional hydrogels' weak mechanical and isotropic properties are greatly limited in practical applications. Here, the internal structure of the hydrogel was regulated by pre-stretching synergistic ion crosslinking to construct a carboxymethyl cellulose-based double network-oriented hydrogel similar to muscle. The introduction of pre-stretching increased the tensile strength of the double-network hydrogel from 1.45 MPa to 4.32 MPa, and its light transmittance increased from 67.3 % to 84.5 %. In addition, the hydrogel's thermal stability and electrical conductivity were improved to a certain extent. Its good mechanical properties and conductive properties can be converted into stable electrical signal output during deformation. The carboxymethyl cellulose-based double network oriented hydrogels were further assembled as flexible substrates into flexible sensor devices. The hydrogel sensors can monitor simple joint movements as well as complex spatial movements, which makes them have potential application value in the research field of intelligent response electronic devices such as flexible wearables, intelligent strain sensing, and soft robots.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yulei Gao,Qiannan Zhang,Fenfen Wang,Pingchuan Sun
Developing color-tunable pure organic room-temperature phosphorescent (RTP) materials based on biopolymers is of great significance for efficient utilization of natural resources, yet still challenging. Herein, tunable multicolor phosphorescence emission, including white-light, is achieved in cellulose-based RTP materials by co-organizing complementary cyan and red organic phosphors into the strong hydrogen-bonding networks of cellulose. The non-radiative transition of phosphors can be effectively suppressed by the high density of hydrogen bonding among the cellulose chains as well as the covalent interaction. The difference in optical properties between the two phosphors enables the adjustment of the phosphorescence emission color of the material from green to cyan, white and then red. It is demonstrated that the designed material can be used as versatile inks for pattern drawing and information encryption , with favorable multicolor emission and excellent aqueous processability. Therefore, considering the biodegradability and sustainability of cellulose materials, cellulose-based RTP has enormous potential in advanced anti-counterfeiting and information encryption as eco-friendly phosphorescent inks and coatings.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
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IF 5.9
Yanjun Pang,Xinxin Luan,Wei Shen,Baolong Zhu,Lixin Wang,Kefeng Zhang,Hongyun Cao,Congxia Xie,Jinhui Pang
The mechanical strength of traditional hydrogels is weak, and it is easy to freeze and harden below zero to lose the characteristics and conductivity of hydrogels, which seriously limits the application of hydrogels in sensors. To solve this problem, an organic hydrogel was prepared using a simple method. After testing, this organic hydrogel not only has good frost resistance but also has excellent mechanical properties. Cellulose-based hydrogels have received increasing attention as good materials for preparing flexible, wearable sensors due to their good biocompatibility, flexibility, and excellent mechanical strength. We polymerized 4-carboxy benzaldehyde (FBA) and polyvinyl alcohol (PVA) into gels under acid-catalyzed conditions, imparted freeze resistance to the hydrogels by introducing dimethyl sulfoxide (DMSO) into the hydrogels, and added water-soluble cellulose acetate (WSCA) to the hydrogels to enhance the mechanical properties of the hydrogels. The organic hydrogel prepared by this method is more stable than conventional hydrogel in low-temperature environments, even below − 80゜C can still maintain the soft state and good mechanical flexibility of the hydrogel, of which WSCA can enhance the mechanical properties, and the stress of the hydrogel can reach 0.85 MPa when the WSCA content is 2%, which is 2.5 times that of the hydrogel without WSCA. In addition, the prepared hydrogel also has good electrochemical performance, under the condition of − 80゜C, connected to the circuit, the small bulb can still maintain a weak brightness. Moreover, the sensor composed of hydrogels can distinguish vigorous movement and weak movement of the human body, which provides a new idea for the application of hydrogels on the sensor.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
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IF 6.8
Mingda Che,Cancan Shan,Renliang Huang,Mei Cui,Wei Qi,Jiří Jaromír Klemeš,Rongxin Su
Cellulose nanocrystals (CNC) are recognized as promising bio-based flocculants for controlling harmful algal blooms (HABs). Due to the charge shielding effect in seawater and the strong mobility of algae cells, CNC can’t effectively remove Phaeocystis globosa from seawater. To solve this problem, peroxymonosulfate (PMS) was used to enhance the coagulation of CNC for rapidly removal of P. globosa . The results showed that 91.7% of Chl-a, 95.2% of OD 680 , and 97.2% of turbidity of P. globosa were reduced within 3 h with the use of 200 mg L −1 of CNC and 20 mg L −1 of PMS. The removal of P. globosa was consisted of inactivation and flocculation. Notably, electron paramagnetic resonance (EPR) spectrums and quenching experiments revealed that the inactivation of P. globosa was dominated by PMS oxidation and 1 O 2 . Subsequently, CNC entrained inactivated algal cells to settle to the bottom to achieve efficient removal of P. globosa. The content of total organic carbon (TOC) and chemical oxygen demand (COD) decreased significantly, indicating that a low emission risk of algal cell effluent was produced in the CNC-PMS system. In view of the excellent performance on P. globosa removal, we believe that the CNC-PMS system has great potential for HABs treatments.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
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IF 8.2
Jinfeng Mei,Zilong Ding,Xiaoyun Sun,Siqi Mo,Xudong Zheng,Zhongyu Li
Lipophilic adsorbents for oil-water separation are usually synthesized using the template method, in which hydrophobic materials are coated on a ready-made sponge. Herein, a novel solvent-template technique is used to directly synthesize a hydrophobic sponge, by crosslinking polydimethylsiloxane (PDMS) with ethyl cellulose (EC) which plays a vital role in the formation of 3D porous structure. The as-prepared sponge has advantages of strong hydrophobility, high elasticity, as well as excellent adsorption performance. In addition, the sponge can be readily decorated by nano-coatings. After the sponge was simply dipped in nanosilica, the water contact angle increases from 139.2° to 144.5°, and the maximum adsorption capacity for chiroform rises from 25.6 g/g to 35.4 g/g. The adsorption equilibrium can be reached within 3 min, and, the sponge can be regenerated by squeezing, without any change in hydrophobility or evident decline in capacity. The simulation tests of emulsion separation and oil-spill cleanup demonstrate that the sponge has great potential in oil-water separation.
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危险品化学品经营许可证（带存储）