Polymer Chemistry
·
2024
·Vol. 15
·期 48
·4952-4961
·
IF 4.1
Haoxin Niu,Yu Li,Ping Zhang,Wenwen Guo,Xin Wang,Yuan Hu
Due to their excellent properties, thermosetting polymer materials have been widely used in many fields. Owing to the restriction of the crosslinked network, traditional thermosetting polymer materials exhibit insolubility and immiscibility. Therefore, the reprocessing of thermosetting polymer materials is a great challenge. With the depletion of petroleum-based resources, the utilization of natural resources for the preparation of bio-based thermosetting polymer materials is a major trend. In this study, eugenol-based covalent adaptable thermosets were prepared via UV curing and thermal curing according to thiol click chemistry. The mechanical properties of the eugenol-based covalent adaptable thermosets, which are better than those of the control sample, can be regulated according to the components. The eugenol-based covalent adaptable thermosets exhibited excellent transparency and UV shielding properties. The introduction of a dynamic covalent boronic ester (BSH) promoted the formation of residual char and enhanced the fire safety of the eugenol-based covalent adaptable thermosets. Owing to the dynamic borate ester bonds in the cross-linked network, the eugenol-based covalent adaptable thermosets exhibited significant stress relaxation behavior, and excellent shape memory function and self-healing properties. The samples were reprocessed at 100 °C several times. After three cycles of pulverizing and hot pressing, the recovery ratio of tensile strength of the reprocessed samples remained above 85%. This study provides a novel strategy for preparing self-healable, reprocessable and anti-flammable covalent adaptable thermosets with tunable mechanical properties.
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POLYMER BULLETIN
·
2025
·Vol. 83
·期 3
·147
·
IF 4
Wang Ying,Dayo Abdul Qadeer,Li Jie
Growing eco-awareness drives research into natural filler-reinforced composites, but hydrophobicity and incompatibility of fillers with matrices are significant challenges. This study investigates the effects of walnut shell biochar (WSBC) as an additive filler in silane-treated hemp fibre (SHF) composites produced with a bio-based epoxy/benzoxazine copolymer via an isothermal compression molding technique. The WSBC particles having 43.66 μm average particle size were produced in a N 2 atmosphere pyrolysis at 400 °C. Produced composites were tested for mechanical, thermal, and thermomechanical properties. The water absorption was significantly reduced as the loading of WSBC share was enhanced. The optimal mechanical properties were recorded on 12 wt% WSBC particle reinforcement, including tensile strength (87.47 ± 3.98 MPa), Young’s modulus (5.66 ± 0.16 GPa), flexural strength (167.47 ± 4.89 MPa), flexural modulus (6.51 ± 0.24 GPa), and impact strength (18.51 ± 0.54 kJ/m 2 ). The highest storage modulus and the lowest damping factor values were observed for the WSBC15 specimen. Moreover, thermal stability was gradually enhanced, and the highest char yield (53.46 ± 0.15%) was recorded for the WSBC15 specimen. Results confirm that these lightweight and eco-friendly composites are promising for structural applications, sporting goods, and internal parts of automotive and aerospace industries.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Ailing Xie,Xinpeng Chen,Xin Ai,Yahui Wang,Yirong Wang,Xiaowei Zhu,Tieling Xing,Guoqiang Chen
In this work, natural phenol eugenol and 1-octadecanethiol was adopted to fabricate superhydrophobic polyester (PET) fabric through click chemistry reaction. The surface of PET fabric was treated with eugenol to further chelate metal ions to increase the roughness. Then, under the UV irradiation and catalysis of photo initiator benzoin dimethyl ether (DMPA), 1-octadecanethiol was introduced to reduce the surface energy of fabric surface through the click chemistry reaction between the double bond in the molecular structure of eugenol and sulfhydryl group, thus the superhydrophobic PET fabric with water contact angle (WCA) of 163.8° and scrolling angle (SA) of 3.47° was prepared. XPS and FTIR results confirmed that Fe 2+ and -SH were successfully co-deposited on the surface of PET fabric through eugenol. The tests results showed that the modified PET fabric maintains stable mechanical properties . Its superhydrophobic property had good stability and durability in the harsh environment of simulated seawater immersion, UV irradiation, acid/alkali and organic reagents erosion. The superhydrophobic fabric also has good self-cleaning performance and oil-water separation performance after repeated use for 25 times and the separation efficiency was more than 95%, which has good application prospects in oily wastewater treatment and protective textiles.
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PHYTOPATHOLOGY
·
2025
·
IF 3.1
Xiansu Wang,Chengyan Xia,Miss Dongxue Li,Miss Fenghua Liu,Jun Zhang,Miss Wenjing Xie,Dan Cheng,Libo Zhang,Zhuo Chen
Eugenol exhibits a broad spectrum of antimicrobial activities and fungicide efficacy against crop diseases. However, the antifungal mechanisms of eugenol remain incompletely understood. In this study, we assessed the inhibitory activity of eugenol against several phytopathogenic fungi, finding it to be particularly effective against Botrytis cinerea . The half-maximal effective concentration for inhibiting hyphal growth of B. cinerea was determined to be 72.11 µg/ml. Eugenol exhibited significant inhibition effect of 66.72 and 43.62% against gray mold on tomato fruit and leaves at the 1,500.0 µg/ml dose. Micromorphological analysis revealed that eugenol induced abnormalities in hyphal structures, including disrupted cell membranes and unclear organelle boundaries. Transcriptomic analysis indicated that differentially expressed genes in hyphae treated with eugenol were primarily enriched in processes related to lipid metabolism, transmembrane transport, and electron transfer activity. Molecular docking studies suggested that eugenol may bind to oleate delta-12 desaturase (FAD2) with a low free energy of −9.9 kcal/mol. Assays of cell membrane permeability and hyphal staining confirmed that eugenol disrupts the cell membrane, resulting in leakage of hyphal contents. Quantitative PCR assay showed that eugenol significantly altered the expression of genes involved in lipid metabolism. Compared to the wild type, fad2 mutant displayed slower hyphal growth rates and became less sensitive to the effects of eugenol. This study demonstrates that eugenol target FAD2, disrupt cell membrane integrity, thereby inhibiting the proliferation of B. cinerea . Several formulations of eugenol, including feneptamidoquin or meridianin C, exhibit stronger inhibitory effects, offering promising potential for the control of gray mold.
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Food Chemistry-X
·
2022
·
IF 6.443
Lijuan Zhu,Wanfeng Hu,Ayesha Murtaza,Aamir Iqbal,Jiaxing Li,Jiao Zhang,Junjie Li,Mengjie Kong,Xiaoyun Xu,Siyi Pan
The potential mechanism behind the browning inhibition in fresh-cut water chestnuts (FWC) after eugenol (EUG) treatment was investigated by comparing the difference in browning behavior between surface and inner tissues. EUG treatment was found to inactivate browning-related enzymes and reduce phenolic contents in surface tissue. Molecular docking further confirmed the hydrophobic interactions and hydrogen bonding between EUG and phenylalanine ammonia-lyase (PAL). Moreover, EUG also enhanced reactive oxygen species (ROS)-scavenging enzyme activities, ultimately decreasing the O 2 - generation rates. Regarding inner tissue, EUG induced the accumulation of colorless phenolic compounds and increased the antioxidant capacity. In conclusion, 1.5 % EUG exhibited the best inhibitory effect on FWC browning, which partly attribute to the direct inhibitory effects on PAL activity. Furthermore, EUG could also enhance the enzymatic/non-enzymatic antioxidant capacity and alleviate the ROS damage to membranes, thereby, preventing the contact between oxidative enzymes and phenols and indirectly inhibiting the enzymatic browning in FWC.
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Food and Bioprocess Technology
·
2022
·Vol. 15
·期 8
·1821-1835
·
IF 5.581
Bai Tingting,Li Jiaxing,Murtaza Ayesha,Iqbal Aamir,Zhu Lijuan,Zhang Jiao,Zhang Bing,Xu Xiaoyu,Pan Siyi,Hu Wanfeng
The effects of eugenol emulsion (EUG) on the browning of fresh-cut yam during storage and its inhibition mechanism were studied. The EUG treatment group had a significant anti-browning ability, and the 1.5% EUG treatment group had the best effect. During the whole storage period, the activities of peroxidase (POD) and phenylalanine ammonia-lyase (PAL) decreased significantly after 1.5% EUG treatment, especially on day 4, when the activity of POD and PAL was 3.2% and 23% of that of the control group, respectively. Molecular docking experiments showed that EUG inhibited PAL activity by binding to the active center of PAL, a key browning enzyme. A decrease in total phenol content was also observed. In addition, after EUG treatment, catalase (CAT) activity was significantly increased, preventing the accumulation of reactive oxygen species (ROS)-H 2 O 2 . EUG inhibited membrane lipid metabolism, 1.5% EUG delayed the emergence of lipoxygenase activity peak, and malondialdehyde (MDA) content decreased by 75.67% compared with the control on 4 d. In comparison with control, EUG increased the scavenging capacity of DPPH, ABTS, and iron-reducing antioxidant capacity (FRAP). The mechanism may be that EUG enhances antioxidant capacity, thereby reducing ROS-induced membrane lipid metabolism, therefore, lowering the synthesis and oxidation of phenolic compounds, and ultimately inhibiting browning.
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Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure & Risk Assessment
·
2022
·
IF 3.549
Jiaze Yan,Shaomin Ma,Mingrui Feng,Jiqi Zheng,Ming Guo
The use of deep eutectic solvents (DESs) has great prospects because of the green and efficient characteristics, which can be used for developing analytical methods for foods. In this research, assisted by ultrasonic waves, a liquid-liquid microextraction detection method combined with gas chromatography was established for three anaesthetics (eugenol, isoeugenol, and methyl isoeugenol) in aquatic food. The processing conditions including the components, ratio of hydrogen bond acceptor and hydrogen bond donor, DES volume, ultrasonic time, and pH were evaluated and optimised to improve the extraction efficiency, which was based on the DES structures and properties. In-house method validation was carried out by applying to real samples. A Thymol: levulinic acid DES (with a molar ratio of 1:2) was used as the extractant and the recoveries were as high as 93–101% for eugenol, 90–100% for methyl isoeugenol, and 86–94% for isoeugenol with RSDs <5% under optimum conditions. The limit of detection and quantification of the eugenol compounds were 0.08–0.10 μg/mL and 0.26–0.33 μg/mL, respectively. The method has green credentials and comparable LOD to homologous apparatus, which can be used for the determination of eugenol components in aquatic food.
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Coatings
·
2021
·Vol. 11
·期 2
·147
·
IF 2.881
Xuan Ma,Qianqian Zhou,Weiqiang Qiu,Jun Mei,Jing Xie
The purpose of this study was to evaluate the effect of an active gelatin coating containing eugenol and vacuum on the microbial diversity of Chinese seabass (Lateolabrax maculatus) during cold (−0.9 °C) storage. The bacterial sequences in Chinese seabass were observed using a high-throughput sequencing technique targeting the V3–V4 region of the 16S Ribosomal DNA (rDNA) on 0, 12th, and 24th day, which showed a more comprehensive estimate of the microbial diversity in seabass samples compared with microbial enumeration. The results revealed that the species diversity of fresh seabass was rich, mainly includingCarnobacterium,Glutamicibacter, andPseudomonas, with abundance ratios of 0.286, 0.160, and 0.130, respectively.PseudomonasandShewanellawere the primary contaminants in the spoiled control samples, where the abundance ratios increased from 0.220 and 0.174 on the 12th day to 0.802 and 0.163 on the 24th day, respectively. Vacuum treatment could inhibit the growth ofPseudomonasandShewanellasuch that when stored on the 12th day,Brochothrixbecame the superior genus. However,PseudomonasandShewanelladominated the storage until the 24th day, where their abundance ratios were 0.343 and 0.279, respectively. The inhibition ofPseudomonasandCarnobacteriumwas gradually enhanced with increasing concentrations of eugenol. Furthermore, an active gelatin coating containing eugenol and vacuum treatment was more effective at inhibiting the increase of the total volatile basic nitrogen. This study confirmed that an active gelatin coating containing eugenol and vacuum could reduce the species of bacteria, inhibit the growth and reproduction of the main dominant spoilage bacteria, and delay the spoilage of seabass.Keywords:coating preservation;high-throughput sequencing;shelf life;diversity
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-17
·
IF 12.6
Guo Xueping,Li Huiyan,Li Zhihao,Cui Ziqi,Ma Guangming,Nassor Aisha Khalfan,Guan Yi,Pan Xiaohong
Background Environmentally responsive nanoscale biocide delivery system enhances smart, regulated, and synergistic biocide application with precise biocide release. In this study, pectin-modified dendritic mesoporous silica nanoparticles (DMSNs) was used as a carrier to successfully construct a microenvironment-responsive (pH, temperature and enzyme) eugenol nano-biocide delivery system for the control of Ralstonia solanacearum infection. Results The results showed that the specific surface area, pore size and surface activity of DMSNs significantly influence the biocide loading of eugenol, and the biocide loading capability was up to 72.50%. Eu@DMSNs/Pec had significant pH and pectinase stimulating effects, with varying release amounts under different temperature conditions. Compared with eugenol alone, Eu@DMSNs/Pec significantly enhanced the efficacy of eugenol. DMSNs assisted eugenol to induce peroxidation damage, produce ROS (•O 2 − , •OH and 1 O 2 ), achieve synergistic antibacterial effects, and had better rain erosion resistance and foliar retention rate based on pectin wettability and adhesion. Eu@DMSNs/Pec-FITC showed demonstrated efficient transport characteristics in tomato roots, stems and leaves, which enhanced the control effect on tomato bacterial wilt. In addition, Eu@DMSNs/Pec exert minimal influence on tomato seed germination and root growth, and have low toxicity to non-target organisms such as earthworms. Therefore, Eu@DMSNs/Pec environment-responsive nano-controlled release nanocarrier can effectively achieve accurate biocide release and reduce biocide dosage. Conclusion This work not only provides a pectin-modified DMSNs-based eugenol nanoscale biocide delivery system in response to specific environmental conditions of R. solanacearum infection but also elucidates the eugenol biocide loading, selective release ability and antibacterial mechanism of the system.
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Microbial Cell Factories
·
2025
·Vol. 24
·期 1
·1-12
·
IF 4.9
Tian Yongqing,Yang Yige,Ni Minmin,Wo Jing
Background Vanillin is a widely utilized flavor compound of significant value in the food and pharmaceutical sectors, which can be obtained through natural extraction, chemical synthesis, or biotechnological processes. However, the yield from vanilla pods is insufficient to meet market demand, and chemically synthesized vanillin not only encounters limitations in its application within the food and pharmaceutical industries but also needs to address environmental concerns and unsustainable raw material sources. Hence, it is imperative to explore alternative approaches to develop an efficient and cost-effective green vanillin. To address the challenges encountered in vanillin biosynthesis, such as substrate uptake limitations and product-induced inhibition of cell growth,we leveraged the advantages of surface display technology and artificial multi-enzyme scaffolds to construct a hybrid surface-display biocatalytic system by assembling Eugenol oxidase (EUGO) and dioxygenase (NOV1), which can convert lignin biowaste 4- n -propylguaiacol (4-PG) into vanillin on the surface of Escherichia coli BL21(DE3). Results To assemble bioactive macromolecules of EUGO and NOV1 on the surface of E. coli BL21(DE3), we utilized Lpp-OmpA-SpyCatcher (LOAS) as an anchoring motif and displayed EUGO-linker-NOV1-SpyTag (ELNS) by covalent interaction between SpyTag andSpyCatcher to allow their spatial proximity. After optimization of the reaction system, our self-assembly display system exhibited highly efficiency in converting 4-PG into vanillin and reached a final concentration of vanillin at 12.58 g/L, 2.5 times higher than that achieved by thewhole-cell biocatalytic system. The LOAS-ELNS display system was applied to the sustainable biosynthesis of vanillin from lignin-derived 4-n-propylguaiacol at least 10 times. Conclusions This work provided a generalized approach to co-expressing proteins and offered an efficient, eco-friendly, and renewable method for the biosynthesis of vanillin from 4-PG.
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Foods
·
2026
·Vol. 15
·期 13
·2327
·
IF 6
Siyi Bao,Jinle Ma,Jianan Liu,Hongman Hou,Jingran Bi,Xufen Xie,Hongshun Hao,Gongliang Zhang
In this study, two antimicrobial food packaging films were prepared by using gelatin/sodium alginate (GSA) as the film substrate and introducing benzyl isothiocyanate (BITC) and eugenol (EUG), respectively. The incorporation of BITC and EUG increased the tensile strength of the GSA film by 66.7% and 32.2%, respectively, while reducing the elongation at break by 44.9% and 39.8%, respectively. The water contact angle increased by 50.4% and 14.9%, and the water vapor permeability decreased by 65.4% and 59.2%, respectively, indicating that the addition of BITC and EUG improved the water resistance of the GSA film. In addition, the incorporation of BITC and EUG reduced the light transmittance of the GSA film. Scanning electron microscopy revealed that the surface inhomogeneity of the GSA film improved after the addition of BITC and EUG. Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) indicated that BITC and EUG interacted with the GSA matrix and affected the structural and thermal characteristics of the composite films. Application tests on cherries and beef have shown that BITC-GSA and EUG-GSA films delayed quality deterioration during storage. Overall, these films show promising potential as biodegradable active packaging materials for food preservation. These two films were applied to cherries and beef, effectively extending their shelf life and demonstrating the potential of these films as food packaging materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Jialin Liu,Ying Shao,Chunhong Yuan,Koichi Takaki,Yujin Li,Yubin Ying,Yaqin Hu
Effects of the eugenol-chitosan nanoemulsion as an edible coating on the quality of hairtail ( Trichiurus haumela ) during storage at 4 °C were evaluated. For all samples, such parameters as pH, thiobarbituric acid (TBA), total volatile basic nitrogen (TVB-N), water holding capacity (WHC), electrical conductivity (EC), total bacteria count (TVC) and sensory were examined periodically. The results demonstrated that eugenol-chitosan nanoemulsion coating showed better preservative effects than chitosan nanoemulsion alone. Therefore, a coating based on eugenol-chitosan nanoemulsion could be regarded as an effective food-grade biopreservative to maintain the quality of hairtail fish and prolong its shelf life during chilled storage.
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高影响因子
危险品化学品经营许可证（带存储）