LANGMUIR
·
2024
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IF 3.7
Fashuo Du,Anyao Ma,Wenxiang Wang,Liangjiu Bai,Hou Chen,Donglei Wei,Kun Yin,Lixia Yang,Huawei Yang
Cellulose nanocrystals (CNCs) have garnered significant attention as a modifiable substrate because of their exceptional performances, including remarkable degradability, high tensile strength, high elastic modulus, and biocompatibility. In this article, the successful adsorption of phytic acid (PA) onto the surface of cellulose nanocrystals @polydopamine (CNC@PDA) was achieved. Taking inspiration from mussels, a dopamine self-polymerization reaction was employed to coat the surface of CNCs with PDA. Utilizing Pickering emulsion, the CNC@PDA–PA nanomaterial was obtained by grafting PA onto CNC@PDA. An environmentally friendly hydrogel was prepared through various reversible interactions using poly(acrylic acid) (PAA) and Fe3+ as raw materials with the assistance of CNC@PDA–PA. By multiple hydrogen bonding and metal–ligand coordination, nanocomposite hydrogels exhibit remarkable mechanical properties (the tensile strength and strain were 1.82 MPa and 442.1%, respectively) in addition to spectacular healing abilities (96.6% after 5 h). The study aimed to develop an innovative approach for fabricating nanocomposite hydrogels with exceptional self-healing capabilities.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
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IF 5.6
Jiayi Lv,Chenglong Zou,Qi Dai,Yin Zhao,Mengqi Zhu,Xiyue Liu,Siqi Huan,Shuo Dou,Long Bai
Pickering emulsions stabilized by nanocelluloses have been utilized within food, cosmetic, and pharmaceutical industries owing to their prolonged stability. However, high hydrophilicity and large dimension of cellulose nanofibrils (CNF) obtained through mechanical disintegration limit their adsorption at the oil/water interface. Herein, aldehyde-modified TEMPO-oxidized CNF (ACNF) with different oxidation degrees is prepared to improve Pickering emulsion stability, broadening its application in asphalt recovery. A battery of characterization methods (TEM, turbidity, contact angle, etc.) demonstrate the installation of aldehyde groups on the ACNF and change of the properties. The aldehyde groups improve hydrophobicity of ACNF while maintaining sufficient carboxyl groups to retain electrostatic repulsion. The fiber length of ACNF decreases with increasing aldylation degree, influencing the amount of ACNF absorbed at the droplet surface. Pickering emulsion stabilized by ACNF-0.12 show optimal performances. The obtained ACNF effectively stabilizes high oil content and different oil types with long-term stability. Flowable Pickering emulsions containing asphalt are obtained. This study offers comprehensive investigation on the influence of aldehyde-modified ACNF on Pickering emulsion preparation, aiming at developing new approaches for various applications.
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FUEL
·
2024
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IF 6.7
Jian Li,Wen Fu,Xiaowei Bai,Xiangrui Lin,Heping Yang,Mengfei Wang,Guangxuan Liu,Zhenghua Dai
Oxidative pyrolysis of biomass, which introduces controlled oxygen into the reaction, enables autothermal processes and addresses heat transfer challenges in large reactors. Oxygen promotes exothermic reactions and changes product composition. Given the unique chemistry of cellulose, hemicellulose, and lignin, their pyrolytic behaviors vary with oxygen levels. This study examines these variations. The results indicate that when 10 vol% of oxygen is introduced, for cellulose, the main impact is on the third (310–410 °C) and fourth (410–700 °C) stages of pyrolysis, where O 2 reacts with the produced sugars (reducing by 6.6 %) and biochar to generate CO, a small amount of CO 2 , and water; for hemicellulose, the main impact is on the fourth stage (340–850 °C), where O 2 reacts with the produced biochar to generate CO, a small amount of CO 2 , and water; for lignin, the main impact is on the second (190–410 °C) and third (410–850 °C) stages, where O 2 reacts with the produced phenolic monomers (reducing by 2.2 %) and biochar to generate CO 2 , a small amount of CO, and water. Cellulose and hemicellulose generate more CO in oxidative pyrolysis, whereas lignin produces more CO 2 , due to varying oxygen content. Furthermore, after the introduction of 10 vol% of oxygen, the pyrolysis process of both lignin and cellulose is advanced, with lignin reaching an exothermic peak value of 18.6 mW/mg, which is 5.3 mW/mg higher than that of cellulose and 11.2 mW/mg higher than that of hemicellulose, indicating that lignin releases the most heat, while hemicellulose releases the least.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Haibin Yuan,Wei Li,Chen Chen,Haiyan Yu,Juan Huang,Huaixiang Tian
Bacterial cellulose, a naturally porous nanomaterial, shows significant potential in encapsulation and sustained-release applications. However, effective methods to construct bacterial cellulose microcapsules (BCM) are lacking, resulting in low embedding rates and poor slow-release effects. This study presents a novel and efficient BCM preparation strategy using mercerization to embed cinnamon essential oil (CEO). The CEO-BCM system was evaluated for its efficacy in preserving prefabricated meat. Results demonstrated that BCM, embedded with CEO through mercerization, achieved an embedding rate of 94.9 % and an average particle size of 63.7 μm. Mercerization transformed BC crystalline into cellulose type II, densifying the BCM structure, while intermolecular hydrogen bonding between BCM and CEO enhanced the stability of CEO-BCM. Release kinetics analysis indicated that CEO release was primarily diffusion-driven (Peppas-Sahlin model) with sustained release performance up to 20 days. Additionally, CEO-BCM exhibited excellent long-term antibacterial (≥81.2 % within 20 days), antioxidant, and thermal stability, effectively extending the shelf life of prefabricated meat products from 5 to 10 days. The developed BCM construction strategy not only addresses the challenges of direct BCM preparation and the limitations in core embedding and controlled release, but also enhances the stability of the CEO. This advancement further expands the application areas of bacterial cellulose (BC), and the prepared CEO-BCM system holds significant potential for food preservation applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Shuning Zhang,Jiajin Zhou,Yuqing Zhang,Yanlan Bi,Jun Li
Zein and ethyl cellulose (EC) were used as raw materials to prepare a composite coating applied in aqueous systems with mechanical properties, water stability, water solubility (including room-temperature (RT)/high-temperature and neutral/acidic conditions), and oil resistance as evaluation index. Results showed the most suitable conditions were mass ratio of zein/EC at 1:9, 93 % ( v /v) aqueous ethanol, oleic acid as the plasticizer with the amount of 0.3 g/g, and curing temperature at 70 °C. Under these conditions, the tensile strength of composite coating was 4.61 MPa and elongation at break was 21.60 % after 4 weeks of soaking in water. Oil seepage was not observed within 1 week. The water solubility of coating in neutral water was 5.13 % at RT for 24 h, and 3.79 % at 80 °C for 2 min; in acidic water (pH = 4) was 4.54 % at RT for 24 h, and 5.44 % at 80 °C for 2 min. SEM results showed swelling occurred in zein coating after soaking, presenting micropores in soaked zein coating; zein microparticles in composite coating partially broke down and fell off after soaking. Water contact angle results revealed surface hydrophobicity by the following order: EC coating > composite coating > zein coating. FTIR results showed composite coating was physically compounding by hydrophobic interactions and hydrogen bonds.
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Journal of Materiomics
·
2024
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IF 8.4
Chuanyin Xiong,Congmin Zheng,Zhao Zhang,Qing Xiong,Qiusheng Zhou,Dongping Li,Mengxia Shen,Yonghao Ni
Recently, multifunctional materials have received widespread attention from researchers. Cellulose nanofibers (CNF) is one of biomass materials with abundant hydroxyl groups, which shows great potential in manufacturing multifunctional composite material. In this paper, a kind of polyaniline@CNF/polyvinyl alcohol-H 2 SO 4 multifunctional composite material (PANI@CNF/PVA-H 2 SO 4 ) was successfully designed by in-situ chemical polymerization of conductive polyaniline (PANI) onto CNF aerogel with high aspect ratio, and then coated with PVA-H 2 SO 4 gel. The composite material has a specific capacitance of 502.2 F/g at a scan rate of 5 mV/s as supercapacitor electrode. Furthermore, when the composite was assembled into a symmetrical supercapacitor, it can still provide an energy density of 11.49 W h/kg at a high power density of 413.55 W/kg. Besides, the as-obtained PANI@CNF/PVA-H 2 SO 4 composite has an excellent electromagnetic shielding performance of 34.75 dB in X-band. In addition, due to the excellent flexibility of CNF and PVA, the PANI@CNF/PVA-H 2 SO 4 composites can be further applied to stress sensors to detect pressure and human motion signals.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Anqi Wu,Yaoning Sun,Zhenyu Wang,Ge Cao,He Zhang
Corrosion is a critical issue in industrial and marine environments, leading to significant economic losses and safety concerns. To address this, polyaniline/cellulose nanocrystal (PANI/CNC) nanorods were synthesized via in-situ chemical polymerization and incorporated into waterborne polyurethane (WPU) coatings to enhance their corrosion resistance. The nanorod structure, leveraging the high dispersibility and conductivity of PANI, along with the stability and surface functionality of CNC, enabled the formation of a uniform and robust composite coating. Systematic characterization, including SEM, FTIR, XRD, UV-Vis, TGA, and zeta potential analysis, validated the structural and thermal properties of the PANI-CNC nanorods. Electrochemical impedance spectroscopy (EIS) and polarization tests demonstrated the superior corrosion resistance of the composite coatings, particularly at 1.0 % PANI content, which achieved optimal performance in 3.5 wt% NaCl solution over 28 days. These results confirm that the synergistic properties of PANI and CNC significantly enhance the barrier and electrochemical performance of WPU coatings, offering a promising strategy for sustainable, high-performance anti-corrosion coatings.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Panpan Yuan,Meng An,Yanyan Chen,Fulin Yang,Hao Sun,Yunwu Zheng,Xu Lin,Can Liu,Defa Hou,Hong Lei,Gianluca Tondi
Due to the innate recalcitrancy caused by robust hydrogen bonding interaction, cellulose cannot be easily processed into high-valued materials or chemicals. Herein, a solvent-free ball milling treatment was conducted to activate microcrystalline cellulose (MCC). The research results demonstrated that ball milling treatment rapidly reduced the average particle size (Ð) and crystalline index (CrI) of MCC. Ball milling treatment for 1 h resulted in the Ð and CrI of MCC decreasing from 48 μm and 84.5 % to 23.3 μm and 25.4 %, respectively. Further prolonging the ball milling time from 1 h to 4 h slightly reduced the Ð and CrI of cellulose but led to the degradation of cellulose. Furthermore, the ball milling-activated cellulose (BMC) was chemically modified for preparing polylactic acid (PLA)/modified cellulose (m-BMC) composite films. Benefitting from the decreased Ð and valid surface modification of BMC, the tensile strength and elongation at break of the achieved PLA/m-BMC improved by 77.2 % and 189.3 % compared with the PLA/MCC, respectively. Besides, ball milling for 1 h improved the relative contents of saccharides in the pyrolysis products of cellulose from 33.2 % to 60.4 %. This work provided some basic understanding of ball milling activation of cellulose for further efficient surface modification and pyrolysis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xin Fu,Jianmin Peng,Xueren Qian
In this paper, cellulose-lignin films containing Fe 3+ were prepared by the codissolution-precipitation method, and the films have high transparency as well as high UV absorption. In this process, kraft lignin chelates with Fe 3+ and then bonds with cellulose through hydrogen bonding, evenly distributing within the film. The morphological results showed that the kraft lignin chelated with Fe 3+ bound tightly linked to cellulose within the Fe@cellulose-lignin composite films. The addition of Fe 3+ made the composite film (C-Fe -0.7 -L) maintain a high transmittance of 66.9 % at 600 nm with excellent UV absorption. Excellent UV absorption performance, completely shielded from both Ultraviolet A (UVA), Ultraviolet B (UVB), and Ultraviolet C (UVC), and improved the thermal stability of the film. Under 100 mW cm −2 solar irradiation, the temperature of C-Fe -0.7 -L rose rapidly to 60.7 °C. Based on this property, solar energy is transformed into kinetic energy, which realizes the photothermal conversion of solar energy. This work realizes the use of transparent films for energy utilization.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yeying Liu,Xiangfei Yin,Yinchun Hu,Min Kang,Junjie Hu,Yan Wei,Di Huang,Yubin Wang
Uncontrollable bleeding caused by severe trauma is life-threatening. Therefore, it is of great significance to develop hemostatic materials that meet the rapid hemostasis of wounds . In this study, a water-triggered shape memory carboxylated cellulose nanofiber/sodium alginate/montmorillonite (CNSAMMTCa) composite hemostatic sponge was prepared, which can promote coagulation by concentrating the blood and activating intrinsic pathway . The anisotropic three-dimensional porous structure formed by directional freeze-drying technology improved the performance of composite sponges which showed good prospects in rapid hemostasis . The results showed that CNSAMMTCa composite sponge had good porous structure, water absorption ability, cytocompatibility and blood cell aggregation capacity. Simultaneously, we confirmed that CNSA3MMT2Ca has best coagulation performance in the mouse censored bleeding model and liver rupture bleeding model. Therefore, CNSAMMTCa composite hemostatic sponge is a safe and efficient rapid hemostatic material which is expected to become an alternative material for clinical hemostatic materials.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Shuai Ma,Jiushuai Deng,Dingquan Xing,Gen Huang,Tianyu Cheng,Di Zhang,Jianying Deng,Wenhui Zhong,Xincun Leng,Bofei Quan
It was previously understood that the smelting process involving high-graphite content sulfide concentrates would result in a chemical reaction with oxygen, which would subsequently release a significant amount of CO 2 . This not only contributes to environmental pollution but also hampers smelting efficiency and quality, consequently escalating smelting costs. Therefore, this work improved the purity of sulfide ores by flotation methods using environmentally friendly depressant to depress graphite. The results of the micro-flotation study reveal that the flotation separation of graphite and sphalerite mixed ore was best under the flotation reagent concentration system of 10 mg/L PBX, 10 mg/L CMC and 8 × 10 −5 mol/L CuSO 4 , and the flotation recoveries were 8.22 % and 79.24 %, respectively. Analyses conducted using FTIR and XPS reveals that PBX competed with CMC for the adsorption of Cu 2+ , and exhibited a stronger adsorption for Cu 2+ on the sphalerite surface compared to CMC, which increased the adsorption of PBX with the sphalerite surface. Meanwhile, the graphite is only affected by CMC, which results led to sphalerite surface hydrophobicity and graphite surface hydrophilicity for efficient separation. Further confirmation was provided by DFT and MD simulations that Cu 2+ were adsorbed on the graphite (001) surface through physical interactions. The adsorption order was as follows: CuOH + < Cu 2+ < Cu(OH) 2 . CMC chemisorbed with Cu 2+ on the graphite surface, resulting in an increase in the adsorbed content of CMC on the graphite surface and an improvement in the hydrophilicity of graphite. These results indicate that CMC effectively depress graphite during the flotation separation of graphite and sphalerite.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Chenxin Guo,Jiayin Gao,Chenglong Wang,Shuangquan Wu,Chunyu Chang
Hemoperfusion is one of the most effective blood purification techniques to quickly remove bilirubin from the blood of patients with kidney or liver failure. Although numerous adsorbent materials with high adsorption capacity have been developed, their clinical application are still limited due to poor biocompatibility and biosafety issues. Herein, biocompatible core-shell structured adsorbents with cellulose microspheres (CMs) as the supporting core and phase-transformed lysozyme (PTL) as the functional shell are fabricated for the removal of bilirubin in hemoperfusion. The PTL nanoparticle size gradually increased from 179 nm to 806 nm as the number of coatings increased from 1 to 7. The adsorption of bilirubin onto CM@PTL adsorbents was monolayer adsorption through a chemical process, and the bilirubin adsorption capacity of CM@PTL-5 was 2.33 times that of CMs. The maximum dynamic adsorption capacity and the breakthrough volume were 35.8 mg/g and 107.3 mL, respectively. Moreover, our adsorbents exhibited excellent blood compatibility and cytocompatibility, which have promising applications in the field of hemoperfusion.
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