INDUSTRIAL CROPS AND PRODUCTS
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2024
·
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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Desalination and Water Treatment
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2024
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IF 1
Ling Yu,Yiqiao Xie,Mengxiao Liu,Lianyu Liu,Zhi Chen,Yang Yu
The wide-spread micropollutants in water have posed severe risks to human health and eco-environment. However, the current treatment techniques generally suffer from low efficiency, high cost and unpractical application feasibility. In this study, a piezoelectric membrane was fabricated by embedding zinc oxide (ZnO) nanorods with several micrometer length into polytetrafluoroethylene nanofiber membrane and applied for the removal of carbamazepine (CBZ) from water. After the sintering, the prepared membrane showed a narrower pore size distribution with the average pore size of ∼1.7 µm. The addition of ZnO nanorods could significantly improve the piezoelectric property of the membrane. During the membrane filtration, the peroxymonosulfate could be effectively activated by the prepared piezoelectric membrane with 2 % ZnO dosage to generate free radicals, achieving about 83.1 % of CBZ from water. According to the radical quenching tests and electron spin-resonance analysis, the hydroxyl radical, sulfate radical, singlet oxygen and superoxide radical greatly participated in the CBZ removal. The CBZ removal efficiency in the US/PMS/PTFE@ZnO-2 system was decreased by 18.2 % after continuous 5-cycle operation, but the performance could be easily renewed by methanol rinsing, demonstrating its attractive reusability and application potential on the efficient removal of micropollutants from water.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Wen-Xuan Hu,Liang-Sen Liao,Le Shi,Qian-Ru Su,Jia-Yang Fu,Xiuzhu Yu,Shuang-kui Du
Herein, oxidation and carboxymethylation were employed to improve the dispersibility and stability of starch nanocrystal (SNC) in aqueous solution by enhancing intermolecular electrostatic repulsion between SNCs, as well as to promote their protein loading capacity. FT-IR, XPS, and NMR analyses confirmed the successful surface modification of SNC, with oxidation likely occurring at the C6-OH position of anhydroglucose units. Oxidation selectively degraded the amorphous parts with small molecular weight, while carboxymethylation removed surface hydrocarbons, promoting relative crystallinity, crystalline lamellae thickness, and structural compactness in the oxidized and carboxymethylated SNC (OSNC and CSNC). Morphologically, OSNC and CSNC exhibited regular square shapes, with CSNC showing a more uniform appearance. Both OSNC and CSNC displayed small hydrodynamic size and high zeta potential, along with high transparency suspensions at pH 7, indicating good dispersibility and stability driven by electrostatic repulsion. Only OSNC, with the highest degree of oxidation, maintained stability at pH 3, due to its strong buffer capacity against protonation. Furthermore, both OSNC and CSNC showed enhanced protein loading capacity, with OSNC achieving higher capacity than CSNC, suggesting its potential as a protein delivery carrier. This work offers alternative strategies to reduce interparticle aggregation in SNCs, broadening their industrial applications.
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BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Heshan Zheng,Yongjie Zheng,Le Yuan,Shuo Li,Junfeng Niu,Xu Dong,Yoong Kit Leong,Duu-Jong Lee,Jo-Shu Chang
The study investigated the inactivation of Microcystis aeruginosa using a combined approach involving thermally activated peroxyacetic acid (Heat/PAA) and thermally activated persulfate (Heat/PDS). The Heat/PDS algal inactivation process conforms to first-order reaction kinetics. Both hydroxyl radical (•OH) and sulfate radical (SO 4 - •) significantly impact the disruption of cell integrity, with SO 4 - • assuming a predominant role. PAA appears to activate organic radicals (RO•), hydroxyl (•OH), and a minimal amount of singlet oxygen ( 1 O 2 ). A thorough analysis underscores persulfate's superior ability to disrupt algal cell membranes. Additionally, SO 4 - • can convert small-molecule proteins into aromatic hydrocarbons, accelerating cell lysis. PAA can accelerate cell death by diffusing into the cell membrane and triggering advanced oxidative reactions within the cell. This study validates the effectiveness of the thermally activated persulfate process and the thermally activated peroxyacetic acid as strategies for algae inactivation.
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POLYMER COMPOSITES
·
2024
·
IF 4.8
Jingliang Xu,Zhiyuan Wang,Asraful Alam,Leiyu Liu,Shen Zhang
This study presents a novel hydrophobic lignocellulosic bioplastic from corn stover reinforced by oxidized cellulose and in situ regenerated lignin. Cellulose-lignin mixture as a matrix was obtained by acid-recyclable deep eutectic solvent (DES) pretreatment of corn stover in mild conditions. Triethoxy(octyl)silane (C 14 H 32 O 3 Si) was employed to improve the water stability of the bioplastic by vapor deposition. The results show that the hydrophobic bioplastic has a high tensile strength, measuring 62.36 MPa. The water contact angle of the bioplastic was increased from 8.50° to 121.9° after hydrophobic modification. We prepared oxidized cellulose-reinforced cellulose paper by different particle size distributions of oxidized cellulose to investigate the reinforcement of oxidized cellulose. The tensile strength of oxidized cellulose cellulose paper increased from 14.41 to 21.18 MPa with the addition of oxidized cellulose. The zeta potential of oxidized cellulose is −47.99 mV, which shows a more negative charge due to carbonyl groups. The repulsive force of oxidized cellulose contributes to the formation of a brick-and-mortar microstructure with cellulose-lignin mixture. It demonstrates that oxidized cellulose can act as bio-adhesives and has a good toughening effect on the mechanical properties of bioplastic. Highlights Lignocellulosic bioplastic was prepared by DES pretreatment of corn stover. Oxidized cellulose was used to reinforce the lignocellulosic bioplastic. The tensile strength of the bioplastic was 62.36 MPa after the reinforcement process. Trieth-oxy(octyl)silane was employed to improve water stability. The water contact angle of the bioplastic was increased from 8.50° to 121.9°.
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CARBOHYDRATE POLYMERS
·
2024
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IF 10.7
Zijian Zhang,Haoran Cui,Xin Wang,Jie Liu,Guangchun Liu,Xin Meng,Song Lin
Lumpectomy plus radiation is a treatment option offering better survival than conventional mastectomy for patients with early-stage breast cancer. However, successive radioactive therapy remains tedious and unsafe with severe adverse reactions and secondary injury. Herein, a composite hydrogel with pH- and photothermal double-sensitive activity is developed via physical crosslinking. The composite hydrogel incorporated with tempo-oxidized cellulose nanofiber (TOCN), polyvinyl alcohol (PVA) and a polydopamine (PDA) coating for photothermal therapy (PTT) triggered in situ release of doxorubicin (DOX) drug was utilized to optimize postoperative strategies of malignant tumors inhibition. The incorporation of TOCN significantly affects the performance of composite hydrogels. The best-performing TOCN/PVA7 was selected for drug loading and polydopamine coating by rational design. In vitro studies have demonstrated that the composite hydrogel exhibited high NIR photothermal conversion efficiency, benign cytotoxicity to L929 cells, pH-dependent release profiles, and strong MCF-7 cell inhibitory effects. Then the TOCN/PVA7-PDA@DOX hydrogel is implanted into the tumor resection cavity for local in vivo chemo-photothermal synergistical therapy to ablate residue tumor tissues. Overall, this work suggests that such a chemo-photothermal hydrogel delivery system has great potential as a promising tool for the postsurgical management of breast cancer.
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CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Hongliang Li,Yingmeng Hou,Shiyu Jia,Mingqian Tan,Haitao Wang
Fucoxanthin (Fx) has garnered significant interest due to its exceptional biological properties. However, its efficacy in enhancing food quality and human health is contingent upon the solubility of the compound in water and its physicochemical stability. Therefore, nanocarriers must be developed to enhance the stability and biocompatibility of Fx. In this study, oxidized paramylon and Fx self-assembled nanoparticles (Fx-OEP) were prepared via the anti-solvent method, with a loading rate of 82.47 % for Fx. The Fx-OEP exhibited robust storage and photostability. In vitro simulated digestion assays demonstrated that Fx-OEP effectively protected Fx from premature gastric release, while achieving a release efficiency of 72.17 % in the intestinal phase. Fx-OEP has the capacity to scavenge a range of reactive oxygen species (ROS) induced by cellular oxidative stress. Treatment with Fx-OEP resulted in a significant reduction in ROS accumulation in insulin-resistant HepG2 cells, which was attributed to the activation of the nuclear factor E2-related factor 2/heme oxygenase-1 (Nrf2/HO-1) pathway. This, in turn, activated insulin receptor substrate 1/glucose transporter type 4 (IRS1/GLUT4), promoting cellular glucose absorption and utilization. These findings indicate the potential of self-assembled nanoparticles based on oxidized paramylon as a new type of nanocarrier for delivering hydrophobic substances.
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Batteries-Basel
·
2025
·Vol. 11
·期 1
·18
·
IF 4.8
Zhiyuan Xiao,Ruiping Zhang,Mengyue Lu,Qiang Ma,Zhuo Li,Huaneng Su,Huanhuan Li,Qian Xu
A comprehensive, three-dimensional, macro-scale model was developed to simulate non-aqueous deep eutectic solvent (DES) electrolyte flow batteries. The model’s feasibility was validated by comparing the simulated polarization data with the experimental results. Utilizing this model, the work reported here compared the flow characteristics and electrochemical properties of electrolytes with different redox couples within the porous electrodes of the batteries. Despite variations in the active materials, the distribution of the electrolyte flow rate showed uniformity due to consistent electrode and flow channel designs, indicating that the structural design of electrodes and channels has a more significant impact on electrolyte flow than the physicochemical properties of the electrolytes themselves. This study also highlighted that TEMPO and Quinoxaline DES electrolytes exhibited less flow resistance and more uniform concentration distributions, which helped reduce overpotentials and enhance battery energy efficiency. Furthermore, this research identified that the highest average overpotentials occurred near the membrane for all the redox couples, demonstrating that electrochemical reactions in DES electrolyte flow batteries primarily occur in the region close to the membrane. This finding underscores the importance of optimizing active redox ions transport in electrolytes to enhance electrochemical reactions in the proximal membrane region, which is crucial for improving flow battery performance.
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Environmental Science and Ecotechnology
·
2024
·
IF 14
Honglong Zhang,Qiaoqiao Zhao,Kangbao Zhong,Ruopeng Bai,Jiaojiao Dong,Jun Ma,Jing Zhang,Timothy J. Strathmann
Research efforts on permanganate (Mn(VII)) combined with redox-mediator (RM), have received increasing attention due to their significant performance for bisphenol-A (BPA) removal. However, the mechanisms underpinning BPA degradation remain underexplored. Here we show the overlooked interactions between RM and BPA during permanganate oxidation by introducing an RM—N-hydroxyphthalimide (NHPI). We discovered that the concurrent generation of MnO 2 and phthalimide- N -oxyl (PINO) radical significantly enhances BPA oxidation within the pH range of 5.0–6.0. The detection of radical cross-coupling products between PINO radicals and BPA or its derivatives corroborates the pivotal role of radical cross-coupling in BPA oxidation. Intriguingly, we observed the formation of an NHPI-BPA complex, which undergoes preferential oxidation by Mn(VII), marked by the emergence of an electron-rich domain in NHPI. These findings unveil the underlying mechanisms in the Mn(VII)/RM system and bridge the knowledge gap concerning BPA transformation via complexation. This research paves the way for further exploration into optimizing complexation sites and RM dosage, significantly enhancing the system's efficiency in water treatment applications.
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LANGMUIR
·
2024
·
IF 3.7
Zeqi Wu,Feng Niu,Wenhao Yao,Siyuan Gao,Da Chen,Yuexiang Huang
The activation of an inert C(sp3)–H bond in selective oxidation of hydrocarbons under mild conditions is a critical and challenging process. Herein, we report a stable chlorine-coordinated metal–organic framework (MOF) photocatalyst, MIL-101(Fe), for efficient visible-light-driven photocatalytic selective oxidation of toluene to benzaldehyde in air under ambient conditions. Encouragingly, a benzaldehyde formation yield of 3.11 mmol·g–1·h–1 with a selectivity of 92.1% is achieved in 5 h, which is superior to most of the reported works. Based on the experimental results and characterizations, the high catalytic performance is mainly due to the promoted rate-limiting step of C(sp3)–H bond activation by a chlorine radical (Cl·) from the coordinated −Cl in the MIL-101(Fe) structure. In addition, the present photocatalyst possesses good substrate tolerance for photocatalytic selective oxidation of various toluene derivatives under optimized conditions.
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Food Bioscience
·
2025
·
IF 5.9
Kexin Huang,Kuiyou Wang,Shida Wu,Xueqian Li,Xinghua Gao,Yun Xiong,Fengyu Bai,Xunyu Song,Mingqian Tan,Wentao Su
Fucoxanthin (FX) has very interesting biological activities, but its low water solubility, stability, and bioavailability limit its applications. This study developed the one-step manufacturing strategy for FX delivery system based on 2, 2, 6, 6-Tetramethylpiperidine-1-oxyl (TEMPO)-oxidized kelp nanocellulose (TKNC), which significantly improved the environmental stability of the hydrophobic substance FX, as well as its intestinal retention ability and bioavailability. TKNC was successfully prepared by TEMPO oxidation and showed good water dispersibility, high specific surface area, and high FX loading capacity. Compared with free FX, this delivery system significantly improved the stability of FX under ultraviolet irradiation, high temperature, and gastrointestinal digestion conditions. In vitro cell experiments demonstrated that this system can significantly reduce the level of reactive oxygen species induced by lipopolysaccharides, and significantly inhibit the release of pro-inflammatory factors, showing its excellent anti-inflammatory ability. In vivo biodistribution experiments further presented that TKNC prolonged the residence time of the Nile Red in the intestine and enhanced its ability to penetrate the intestinal barrier, ultimately significantly increasing the enrichment in the liver of mice. These findings provide a new strategy for improving the stability and bioavailability of hydrophobic active substances.
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Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-17
·
IF 36.3
Han Xuewen,Hao Cheng,Peng Yukang,Yu Han,Zhang Tao,Zhang Haonan,Chen Kaiwen,Chen Heyu,Wang Zhenxing,Yan Ning,Pu Junwen
A mild 2,2,6,6-tetramethylpiperidine-1-oxide mediated modification system was applied to improve the reactivity and introduce porous structure of cellulose fiber skeleton.
Composite exhibited highly efficient electromagnetic shielding interference performance (> 99.99%) over multi-band.
Integrating energy storage, electromagnetic interference shielding, and structural design into bio-based materials.
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