INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yuhang Yang,Xinwang Cao,Jinyou Lin
Air pollution such as particulate matter is always a serious threat to public health, thus many disposable and degradable air filters were designed to deal with this severe challenge avoiding the secondary pollution after discarding. Herein, inspired by the natural spider web structure, a hierarchical porous composite fibrous membrane containing web-like cellulose nanofibrils (CNF) was developed. The implanted porous CNF membranes with web-like among the inter-fiber voids of electrospun poly(ethylene- co -viny alcohol) fibrous membrane were realized via a layer-by-layer (LBL) method followed by an elevated-temperature drying, which exhibit a smaller diameter with one or two orders of magnitude reduction comparing with the substrate fibers. The morphology of implanted CNF membranes can be regulated by changing the CNF dispersion concentration, PH, solution composition as well as the LBL times. The addition of a small amount of isopropyl alcohol to the CNF solution can efficiently facilitate the implantation of web-like CNF on substrate, resulting in both improvements on the mechanical properties and filtration capacity. The result shows that the implanted web-like CNF of as-prepared composite membrane can enhance the PM 0.3 capture ability (reaching 96.8 %) while not surge its pressure drop (225.7 Pa) exceeding N95 standard. This work presents a new design and fabrication of CNF-based filter materials directly without using freeze drying, which can not only provide a fully or partially biodegradable air filter but also give encouragement to explore new filters efficiently.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Ruonan Zhu,Ming Yang,Jie Yin,Zheng Wu,Meiru Li,Lihong Zhao,Xingjie Wang,Junli Ren
In order to enhance enzymolysis saccharify, the impact of pretreating wheat straw with sodium carbonate (Na 2 CO 3 ) at moderate temperatures was investigated. The effects of pretreatment condition, for instance, reaction time (10–120 min) and temperature (75–105 °C) were investigated on delignification and polysaccharides (cellulose and hemicellulose) protection. It was found that the wheat straw effectively achieved the recovery of 82.67 %, 89.70 %, and 71.11 % for total sugar, cellulose, and hemicellulose respectively, and removed of 54.96 % lignin after pretreatment at the temperature of 90 °C with 4 % (w/v) Na 2 CO 3 for 120 min. After a 20 FPU enzymes saccharification for 72 h, the highest enzymatic digestibility of cellulose and xylan for pretreated residues were 81.8 % and 82.4 %, significantly higher than that of the raw material (16.48 % cellulose enzymatic digestibility, 8.43 % xylan enzymatic digestibility). The enzymatic hydrolysis results also demonstrated that the removal and polydispersity of lignin affected the conversion efficiency of the raw material, and delignification degree was positively correlated to enzymatic hydrolysis efficiency within a certain range. This pretreatment has potential for C6 and C5 sugars co-fermentation of wheat straw for biorefinery.
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IONICS
·
2025
·
IF 2.6
Yu Kaifeng,Gong Yanan,Hui A. O.,Liang Ce,Li Yi
Transition metal sulfides exhibit a high theoretical specific capacity and have great potential to be used as a negative electrode material for lithium-ion batteries, but they are prone to produce volume expansion during the cycle process, which leads to the disintegration of the electrode material structure and affects the battery performance. This paper reports the synthesis of high-performance electrode materials, Ni 3 S 2 /Co 9 S 8 /WSCC, a composite of Ni 3 S 2 /Co 9 S 8 nanocages, and wheat straw cellulose carbon (WSCC) by a simple hydrothermal method. This composite structure has the following advantages: (1) two metal sulfides, Ni 3 S 2 and Co 9 S 8 , are introduced simultaneously through the synthesis of nanocages, which can increase the defects and active sites at the interface. At the same time, the nanocage structure helps to buffer the volume change during ion insertion and detachment and promote ion diffusion. (2) The biomass carbon material as a substrate not only plays a supporting role, but also reduces the agglomeration of nanocages, making them have better dispersion. Using it as a lithium-ion battery anode, it has a specific capacity of 535.8 mAh g −1 after 300 cycles at 1 C.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Meiyan Sun,Dongmei Li,Yan Xi,Xiaotong Qin,Yuting Liao,Xiaozhi Liu,Shiru Jia,Yanyan Xie,Cheng Zhong
Skin wounds are repaired by a complex series of events and overlapping phases in which bacterial infection and insufficient angiogenesis at the wound site delay the healing process. Thus, functional wound dressings with enhanced antibacterial activity and angiogenic capacity have attracted attention. Herein, bacterial cellulose (BC)-based dressings were successfully fabricated by functionalization with a polydopamine (PDA) coating and copper sulfide nanoparticles (CuS NPs). Under 808 nm laser illumination, the BC/PDA/CuS composite membranes exhibited outstanding adjustable photothermal and photodynamic activities as well as controlled Cu 2+ release, endowing the composite membranes with synergetic antibacterial activity. Specially, a bactericidal efficiency of 99.7 % and 88.0 % for Staphylococcus aureus and Escherichia coli was achieved after treatment with BC/PDA/CuS5 sample under NIR irradiation (0.8 W/cm 2 , 10 min), respectively. Moreover, the BC/PDA/CuS5 composite membrane could enhance the angiogenesis due to the released Cu 2+ . In vivo experiments revealed that the BC/PDA/CuS5 composite membrane dressing could accelerate the wound closure process of the full-thickness skin defects with S. aureus by synergistically reducing inflammation, enhancing collagen deposition, and promoting vascularization under NIR irradiation. Additionally, the BC/PDA/CuS5 composite membrane exhibited high biocompatibility and biosafety. This work offers a new strategy to prepare multifunctional BC-based dressing for clinical wound healing.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Qingtian Xu,Jierui Ye,Shuaibo Han,Yuebing Gao,Pan Chen,Siqun Wang,Qiang Wu,Qian Li
Renewable polymeric microcapsules hold promise for precisely controlled release of hydrophobic drugs (curcumin) in therapeutic treatment. However, there still remains challenges to stabilize the properties of microcapsules and to enhance encapsulation efficiencies of curcumin. By using an eco-friendly ternary deep eutectic solvent here, we successfully fabricated native cellulose nanofibrils, holocellulose nanofibrils, and lignocellulose nanofibrils containing both phytates and sulfate groups. In addition, a novel type of curcumin-loaded polymeric microcapsules with diameter of 10–20 μm were prepared by cellulose nanofibrils as stabilizing agents in Polylactide Pickering emulsion. The Pickering emulsions stabilized by P/N/S-containing cellulose nanofibrils, holocellulose nanofibrils, and lignocellulose nanofibrils are more stable than the unmodified cellulose nanofibrils-stabilized emulsion. The Pickering emulsion stabilized by 0.2 wt% P/N/S-containing lignocellulose nanofibrils exhibited the highest emulsion layer height and the zeta potential reached −39.74 ± 2.88 mV. Moreover, the highest encapsulation efficiency of curcumin can be up to 94.80%. Antimicrobial test revealed that curcumin in the polymeric microcapsules exhibited an excellent inhibitory effect on S. aureus and the antibacterial efficiency reached 98.66%. These results provided important information on the comparison of different cellulose nanofibrils-stabilized Pickering emulsions and the application of controlled release of curcumin incorporated polymeric microcapsules in drug delivery system.
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ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Lei Li,Liu Liu,Yan Qing,Zhen Zhang,Ning Yan,Yiqiang Wu,Cuihua Tian
Although hydrogel electrolytes have attracted considerable attentions due to high water retention and low leakage, their vulnerability and low conductivity still pose challenges in large-scale applications. In this work, a mechanically strong and highly conductive poly (acrylic acid) (PAA) electrolyte reinforced by cellulose nanofibrils (CNFs) is developed via versatile blending followed by polymerization. As a result of physical entanglement and hydrogen bonding , the mechanical strength of the PAA electrolyte is enhanced from 0.656 to 1.875 MPa at a CNF loading of 3 wt%, and the dimensional swelling is suppressed to half of its original level. The ionic conductivity of the composite electrolyte is improved by 100% due to excellent ion-transfer paths created by the hydroxyl groups exposed on the surfaces of CNFs. Furthermore, the CNF/PAAs exhibit preferable elasticity and flexibility with the maximum elongation at break reaching greater than 600%. These electrolytes are able to maintain the initial ionic conductivity even after being stretched to 100% elongation for 500 circles. After assembling with an air cathode and an aluminum anode, the as-prepared Al−air battery show good discharging performance, demonstrating promises for applications in portable and flexible electronic devices.
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ChemElectroChem
·
2018
·Vol. 5
·期 10
·1407-1414
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IF 4.446
Yun Su,Fei Yang,Lijuan Zhou,Yong Geng,Jianming Zhang,Min Jiang
Graphical Flexible and friendly : A free-standing film was fabricated using a mixture of cellulose nanocrystals (CNCs), viologen, and KCl. The viologen/KCl/CNCs film was sandwiched between two ITO glasses to construct the viologen-based electrochromic devices (ECDs). ECDs based on four kinds of viologens with different substituent groups show different driving voltages and distinct coloration response. The performance of the viologen-based ECDs does not depend on any organic solvent. This work benefits the development of sustainable and environmentally friendly viologen-based ECDs for the application in optical displays. The new, sustainable, and pro-environmental electrochromic devices (ECDs) have attracted tremendous attention due to the current issues regarding energy sources consumption and environmental pollution. A free-standing composite film, consisting of cellulose nanocrystals (CNCs) as biological matrix, viologen, and KCl, was prepared by a casting method. Such a composite film is flexible and can be tailored into various shapes for patterned applications. The viologen/KCl/CNCs film was sandwiched between two indium-tin oxide (ITO) glasses to construct viologen-based ECDs. The performance of the viologen-based ECDs did not depend on the organic solvent. ECDs based on four kinds of viologens with different substituent groups exhibited distinct coloration response. Besides the nature of the substituent groups attached to the bipyridine rings, the presence of CNCs is a crucial factor that affects the electrochromic performance of ECDs. The dimethyl-substituted viologen ECD has a fast response time (10 s for bleaching and 7.3 s for coloring). And for the dibenzyl-substituted viologen, a low voltage of −2.2 V can drive the coloration of its ECDs. The diethyl-substituted viologen ECD exhibits 30 % transmittance variation and good coloring/bleaching stability. The ability to be tailored and degradability of the composite film provides a feasible strategy for the sustainability of electrochromic displays.
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JOURNAL OF POLYMER SCIENCE
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2024
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IF 3.9
Xia Du,Xiaomin Zhang,Zhuang Zhao,Youjie Rong,Pengdi Cui,Xiaobo Huang
Eutectic gels have great advantages in the application of flexible wearable electronic devices due to their good stability and flexibility. However, the adhesion properties of current eutectic gels are poor and the processing process is complicated. Based on this, this study proposed a eutectic gel with excellent adhesion properties that can be photocurable for 3D printing. We designed a polymerizable deep eutectic solvent (PDES) using acrylic acid as the main monomer, acrylic acid/choline chloride (AA/ChCl) as the eutectic solvent, and dopamine-grafted cellulose nanocrystals (DC) as the nanoscale crosslinking agent. The introduction of DC endows the gel with a denser hydrogen bond network, which can effectively provide energy dissipation and improve the mechanical properties of the gel. The introduction of mussel-inspired dopamine into the gel network gives the gel good adhesion. The low freezing point and low volatility of PDES give the gel excellent freezing resistance and long-term storage stability. Furthermore, the gel has a sensitivity factor of up to 9.5 (at 0%–900% strain), showing excellent strain sensing performance. In addition, the gel can not only realize the customization of various complex structures through digital light processing (DLP) 3D printing technology, but also the manufactured wearable devices can complete the accurate sensing of various strain signals of the human body. Therefore, the combination of multi-performance compatible eutectic gel materials and photocurable 3D printing technology will provide a new idea for the design and manufacture of flexible wearable devices. Graphical Preparation and properties of 3D printed eutectic gels crosslinked by dopamine-graftednano-cellulose.
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高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Ting Su,Xinxing Zhang,Zhiru Wang,Yu Guo,Xueyang Wei,Bin Xu,Hengtong Xia,Wenzhong Yang,Hui Xu
A cellulose nanocrystal (CNC) polymer hydrogel containing magnetic iron oxide nanorods (Fe 3 O 4 NRs) was prepared for As(III) removal in water. Systematic studies on the performance of these prepared CNC-based composite hydrogels for the removal of As(III) have been undertaken. The maximum adsorption capacity of the CNC- g -PAA/ q P4VP (CP q P) hydrogel was 241.3 mg/g. After introduction of Fe 3 O 4 NRs in the hydrogel, the maximum adsorption capacity of the resulting Fe 3 O 4 NRs@CNC- g -PAA/ q P4VP (FN@CP q P) hydrogel was further improved to 263.0 mg/g. The high adsorption performance can be attributed to the facts that the 3D interconnected porous network of the hydrogel allows As species to easily enter into the hydrogel, the quaternized P4VP chains provides more adsorption sites, Fe 3 O 4 NRs uniformly distributed in the internal cavity of the hydrogel significantly reduces the nanoparticle aggregation. The adsorption kinetics indicated that the adsorption of arsenic by the hydrogel was mainly chemisorption. The isotherm analysis revealed that the adsorption of arsenic by the hydrogel was principally monolayer adsorption on a homogeneous surface. Moreover, the as-prepared CNC-based polymer hydrogels exhibited good stability and reusability with negligible performance loss after five adsorption-desorption cycles. The novel FN@CP q P hydrogel demonstrates great potential as a cost-effective adsorbent for the removal of arsenic contaminants from wastewater.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yingqi Gu,Yucai Shen,Tinghao Wu,Fangzhou Hu,Tingwei Wang
In recent years, considerable attention has been given to the utilization of biomass for producing bio-based foams, such as starch-based foams. Despite their renewability and widespread availability, these foams still present certain drawbacks regarding their poor mechanical properties and flammability . To tackle these concerns, a metal ion cross-linking strategy was employed by incorporating calcium ions (Ca 2+ ) solution into foamed starch/cellulose slurry. Followed by ambient drying, starch/cellulose composite foam was successfully fabricated with a remarkable enhancement in various properties. Specifically, compared to the control sample, the compressive strength and modulus increased by 26.2 % and 123.0 %, respectively. Additionally, the Ca 2+ cross-linked starch/cellulose composite foam exhibited excellent heat resistance , water stability, and flame retardancy. The limiting oxygen index (LOI) reached 52 %, with a vertical combustion rating of V-0. Along with the addition of 2 phr diatomite , it demonstrated a significant enhancement on flame retardancy with a LOI of 65 %, although the apparent density of the composite foam was not low enough. This study indicated a green and simple method to obtain starch-based composite foams with enhanced comprehensive properties including thermal, water stability, mechanical, and flame retardancy, expanding their potential applications in areas such as building materials and rigid packaging.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Ziyong Zhou,Jun Xu,Junliang Lu,Jun Li,Wei Zhang,Kefu Chen
The functional chemicals in conventional personal care products may have negative effects on both human body and the environment, and natural proteins are gaining increasing attention as alternatives to functional chemical. However, due to the poor absorption of proteins on the surface of the hair, it cannot perform their function well. In this study, a protein-based multifunctional complexes, made of keratin and cationic cellulose nanocrystals by opposite charged-induction, were prepared for improving the glossiness and reducing hair thermal-photo damage. By changing the ratio of keratin and cationic cellulose nanocrystals in complexes, the optical properties and oil delivery property were studied. It was found that the protein-based complexes could improve the glossiness of substrate and have synergistic reducing UV transmittance, especially UVB. Besides, the complexes with high ratio of C-CNC were beneficial for the deposition of silicone oil onto hair. And after treated with the complexes or the resulting emulsion, the water evaporation of hair during heat treatment and the hair damage during light radiation were effectively reduced to improve the thermal-photo protection for hair. This study was expected to provide new design for improving adsorption of protein on the substrate and developing protein multifunctional application in personal care.
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PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Siqi Zhang,Feng Zhang,Juanjuan Su,Jian Han
Passive daytime radiative cooling technology is a highly efficient cooling technology with zero energy consumption. When utilized for personal thermal management, radiative cooling textiles are capable of finely regulating the temperature of the human skin microenvironment. This study presents a cellulose acetate (CA) hierarchical porous coated textile that accomplishes high reflectance of sunlight over the full wavelength range, with a low cost and scalability, and a simple preparation procedure. With a high reflectance of 0.91 in the solar wavelength band and a high emissivity of 0.95 in the atmospheric window wavelength band, the CA hierarchical porous coated textile offers exceptional spectrally selective performances. It manifests a subambient cooling temperature of up to 19.0 °C and a skin overheating prevention effect of up to 4.2 °C. Furthermore, the coated textile possesses promising abrasion resistance, acid-alkali corrosion resistance, and mechanical properties. The present work provides a facile path for the development of green-based radiative cooling coated textiles.
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危险品化学品经营许可证（带存储）