Polymers
·
2019
·Vol. 11
·期 9
·1418
·
IF 3.164
Wei Li,Kewang Zheng,Hujian Chen,Shirong Feng,Wei Wang,Caiqin Qin
The combined effects of nano titanium dioxide (TiO2-N) and clove oil (CO) on the physico-chemical, biological and structural properties of chitosan (CH)/starch (ST) films were investigated by using a solvent casting method. Results indicated that the incorporation of TiO2-N could improve the compactness of the film, increase the tensile strength (TS) and antioxidant activity, and decrease the water vapour permeability (WVP). As may be expected, the incorporation of CO into the film matrix decreased TS but increased the hydrophobicity as well as water vapour barrier antimicrobial and antioxidant properties. Fourier-transform infrared spectroscopy (FTIR) data supported intermolecular interactions between TiO2-N, CO and the film matrix. Use of a scanning electron microscope (SEM) showed that TiO2-N and CO were well dispersed and emulsified in the film network. Thermogravimetric (TG) and derivative thermogravimetric (DTG) curves demonstrated that TiO2-N and CO were well embedded in the film matrix, hence this blend film system could provide new formulation options for food packaging materials in the future.Keywords:chitosan;starch;nano titanium dioxide;clove essential oil;edible film
研究领域:
食品科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 1
·600-605
·
IF 1.556
Jiang Ping,Li Duxin,Xiao Ya,Yang Xingxing,Liu Yuejun
The biodegradable microcapsules based on chitosan for a controlled delivery of clove oil were prepared by the single coagulation process. The effect of chitosan concentration, core to shell ratio, types of emulsifier, flocculating agent and hardening agent on the microcapsule diameter
and the particle size distribution of microcapsule were investigated. The optimized conditions for the preparation of microcapsules with well-defined structure and narrow dispersibility were under that (1) the concentration of chitosan was 1.0 wt%, (2) clove oil to chitosan ratio was 75:25,
(3) OP-10 and 10 wt% sodium sulfate were used as emulsifier and flocculating agent respectively, and (4) the concentration hardening agent glyoxal was 1 wt% based on the weight of chitosan. The uniform spherical structures with smooth surfaces with a particle size distribution of 1–15
μm were evidenced by SEM images of microcapsules. Core–shell, hetero-structures were confirmed by optical micrograph. The chemical component of the microcapsules was determined by FTIR. Thermal analysis showed the microcapsules were thermally stable below 150°C. It was
found that the pH value and temperature play important roles on the release rate of clove oil from the microcapsules. The release volume of clove oil from microcapsules at pH = 7, and pH = 10 were smaller than that at pH = 2. And the release volume of Clove oil from microcapsules at 60°C
was smaller than that at 20°C and 40°C, which showed a sustained and prolonged release.
研究领域:
食品科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2014
·
IF 2.628
Xingfeng Shao,Baoying Cao,Feng Xu,Shuhui Xie,Dandan Yu,Hongfei Wang
The antifungal activity of chitosan combined with clove oil against Penicillium digitatum , the causal agent of citrus green mold, was tested in vitro and in vivo . Chitosan combined with clove oil inhibited mycelial growth more than individual treatments, which was related to the greater release of cellular material and the largest alterations in hyphal morphology of P. digitatum . However, compared to chitosan alone, 1% chitosan coatings combined with various amounts of clove oil (0.5, 1 or 2 mL/L) showed no greater ability in controlling decay development on artificially inoculated citrus fruit. 1% chitosan combined with 0.5 mL/L clove oil appeared to slightly reduce lesion diameter and enhanced the activities of defense enzymes, including chitinase and phenylalanine ammonia-lyase at the later stages of incubation. This study indicated that the synergistic antifungal activity of chitosan-clove oil observed in in vitro studies was not found in in vivo tests. Therefore, the data suggest that a coating of 1% chitosan alone, not combined with clove oil, can effectively contribute to the control of green mold on citrus fruit.
研究领域:
植物保护
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食品科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Zujin Yang,Guifang Wu,Cui Gan,Guangmei Cai,Jianyong Zhang,Hongbing Ji
Developing efficient separation technologies for wastewater treatment and recovery of natural products is crucial in practical application. Covalent capture of supramolecular gel materials and the further surface modification benefit for the improvement in adsorption performance. In the present paper, two kinds of supramolecular gels, N , N ', N ”-(3-methylpyridine) benzenetriamide (TMPTA) nanotube and N , N ', N ”-(3-pyridyl) benzenetriamide (TPTA) nanofiber, were synthesized successfully by supramolecular self-assembly of tripodal pyridines and then were further modified with α,α'-dibromo-p-xylene to obtain imidazolium-based gel materials, TMPTA-G-M and TPTA-G-M. They have stable porous structure and positively charged surfaces with different morphologies. The synthesized gels are characterized by physico-chemical techniques, and the results show that the modification process does not cause significant changes in the morphology. TMPTA-G-M and TPTA-G-M are applied as adsorbents for the selective separation of anionic Congo Red (CR) and cationic dye Rhodamine B (RhB) from aqueous solutions. Maximum adsorption amounts ( q max ) on TPTA-G-M are 87.95 mg/g for CR and 85.83 mg/g for RB, and on TMPTA-G-M are 372.03 mg/g for CR and 45.64 mg/g for RB, respectively. For the arsenate adsorption, TMPTA-G-M showed significantly better adsorption performance with q max of 66.5 mg/g in solutions at pH = 9 in 10 min. Additionally, TMPTA-G-M is used for the selective separation of eugenol from eugenol acetate which coexist extensively in Clove oil , and it shows excellent adsorption selectivity for eugenol with q max of 93.59 mg/g at pH = 11. The mechanism study suggests that the morphology of the gels affects the distribution of charge and further affects the adsorption performance. And the adsorption may involve electrostatic interactions between adsorbent and adsorbate. The results indicate high adsorption ability and regeneration efficiency for TMPTA-G-M, implying the potential application in wastewater treatment and separation of natural product.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 8
·6152-6158
·
IF 2.019
Wang Hua,Xing Wenjia,Chen Jing,Liu Guixiang,Xu Guangliang
In this work, dendritic silver nanostructure (DSN) was synthesized via a novel and eco-friendly method. The effects of the dosage of clove oil, concentration of silver nitrate and ultrasonic time on the formation of DSN were discussed. The structures of the obtained products were characterized by X-ray power diffraction, field emission scanning electron microscopy, transmission electron microscopy, and the chemical composition of DSN was examined by energy dispersive X-ray spectroscopy. The results show that the length of the trunks is approximately 2–5 μm and that of the lateral branches is about 0.5–2 μm. The conductive inks filled with dendritic silver and sphere silver powders were prepared respectively at mass fraction of 60%. The result shows that the coating of the conductive ink filled with dendritic silver has a lower sheet resistance of approximately 0.07 Ω/□ at a thickness of 20 μm.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PHARMACEUTICAL DEVELOPMENT AND TECHNOLOGY
·
2022
·
IF 3.915
Yang Ding,Yuxiao Wang,Jiaxin Li,Maomao Tang,Hairong Chen,Guichun Wang,Jian Guo,Shuangying Gui
A satisfactory clinical effect in treating periodontitis is often difficult to achieve by conventional non-surgical systemic drug delivery due to the narrow anatomical structure of the periodontal pocket and insufficient drug concentration at lesion sites. In addition, the feasibility of combating periodontal tissue lesions by restoring the alveolar bone and allowing collagen regeneration has not been fully explored. The objective of this study was to prepare a microemulsion integrating the anti-inflammatory and osteogenic active ingredients of baicalin and clove oil (BC-MEs). Then, the composite hydrogel obtained by mixing poloxamer 407 and 188 was used as the thermosensitive gel matrix to load BC-MEs and form a drug reservoir (Gel-BC-MEs) injectable in situ. Gel-BC-MEs exhibited a significant, sustained release of baicalin for 12 h, gelation temperature was 33.4 ± 0.36 °C, and pH was 5.45 ± 0.12. The experiment on a rat periodontitis model demonstrated that Gel-BC-MEs significantly improved periodontal tissue repair by collagen regeneration and osteogenesis by inhibiting osteoclast infiltration. This study proposes a novel strategy for periodontal tissue repair by enhancing the therapeutic potential of a microemulsion using an in situ nano-gel delivery system.
研究领域:
药剂学
·
牙科材料
·
组织工程
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2024
·
IF 5.6
Xianghong Xie,Bangfeng Fu,Mingyu Zhang,Wentao Zhang,Zhenghua Xu,Shuwen Liu,Jianlong Wang
The implementation plan of extending the shelf life of food while ensuring food safety is playing an increasingly important role in promoting global solutions to food waste. Here, we have logically created a new eugenol nanoemulsion to sense spoilage and extend the shelf life. The nano lotion (Eu/SA) was loaded with sodium alginate nanoparticles as carrier, eugenol as antibacterial agent and antioxidant. Fluorescein isothiocyanate (FITC) was utilized concurrently as an indicator by simply mixed with Eu/SA nanoemulsion, then physically deposited on a commercial filter membrane to create smart fluorescent labels. Shrimp with and without the Eu/SA nanoemulsion coating had their freshness monitored using a non-contact tagging technique. And through smartphone integrated with RGB (red/green/blue) analysis for digitization, it was found that the RGB of uncoated shrimp was greater than that of treated shrimp. Additionally, without coating treatment, thiobarbituric acid (TBA), pH and viable bacterial count (TVC) of Shrimp all exceed the established. Eu/SA nanoemulsion offers a more appealing monitoring and preservation integration platform for the food safety industry.
研究领域:
食品科学
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纳米技术
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生物技术
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化学工程
·
传感器与执行器
✓ 已验证
产品关联
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Dai-xin Yu,Cheng Qu,Jia-yi Xu,Jia-yu Lu,Di-di Wu,Qi-nan Wu
Perillae Folium (PF) is a well-known food and herb containing different chemotypes, which affect its quality. Herein, a method was proposed to classify and quantify PF chemotypes using gas chromatography–mass spectrometry (GC–MS) and Fourier transform-near infrared spectroscopy (FT-NIR). GC–MS results revealed that PF contains several chemotypes, including perilla ketone (PK) type, α -asarone (PP-as) type, and dillapiole (PP-dm) type, with the PK type being the predominant chemotype. Based on FT-NIR data, different chemotypes were accurately classified. The random forest algorithm achieved >90 % accuracy in chemotype classification. Furthermore, the main components of perilla ketone and isoegomaketone in PF were successfully quantified using partial least squares regression models, with prediction to deviation values of 3.76 and 2.59, respectively. This method provides valuable insights and references for the quality supervision of PF and other foods.
研究领域:
药学
·
分析化学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Runan Zhao,Haocheng Guo,Tianyi Yan,Jiaheng Li,Weidong Xu,Yong Deng,Jianwei Zhou,Xingqian Ye,Donghong Liu,Wenjun Wang
A new multifunctional film with active and intelligent effects was developed by incorporating curcumin-clove oil emulsion into natural materials. The basic properties, functional characteristics, and pH/NH 3 -sensitivity of films were investigated, and then these films were applied to extend shelf-life and monitor freshness of meat. Curcumin solution and emulsion illustrated significant color variations at different pH values. The incorporation of emulsion improved the UV–vis barrier and water resistance properties of films, which blocked most of UV-light and its water contact angle reached 100.03°. Meanwhile, the films had stronger mechanical strength and higher thermal stability, with elongation at break reaching 79.18 % and the maximum degradation temperature rising to 316 °C. Moreover, emulsion made films have a slow-release effect on clove oil, which not only enhanced the antioxidant property but also significantly improved their antibacterial activity. Additionally, the multifunctional films presented a significant color response to acidic/alkaline environments over a short time interval and could be easily identified by naked eyes. Finally, the films effectively extended the shelf-life of fresh meat by 3 days at 4 °C and visually monitored freshness through color changes in real-time. This knowledge provides insights and ideas for the development of novel food packaging with both active and intelligent functions.
研究领域:
材料科学
·
食品科学
·
生物技术
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD SCIENCE AND BIOTECHNOLOGY
·
2025
·
IF 3.1
Tan Jin-Ming,Cui Rui,Hu Teng-Gen,Wu Hong
In order to improve the antifungal activity of natural fungicides to control the fungal contamination on bread products, the synergistic combination of cinnamaldehyde with citral (S CC ) against main bread spoilage fungi ( Aspergillus niger and Penicillium citrinum ) was screened. Compared to the single MICs of cinnamaldehyde and citral, the MICs of them against both fungi were significantly reduced by 74–87% when presented in S CC . In vitro tests demonstrated that S CC completely inhibited the spore germination and mycelial growth of both fungi at its MIC. Mechanistic investigations revealed that S CC caused severe cellular membrane damage and disrupted the intracellular redox homeostasis in both fungi. In situ tests showed S CC significantly extended the shelf life of bread by 9 days without adversely affecting the sensory flavor and quality of the bread. These results indicated that S CC is potential as a natural preservative in baked products.
研究领域:
食品科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Jinghan Ding,Jiakang Yu,Jinmeng Zhu,Liuyang Han,Hong Guo,Rui Feng,Wenqiang Dong,Xichen Zhao,Shan Wang,Li Li,Xuanhua Li
Palm leaf manuscripts, crafted from specially treated palm leaves, are invaluable historical documents. However, they degrade and tend to become brittle over time. To date, plant essential oils and glycerin are the used materials to improve the flexibility of palm leaf manuscripts, but the effective duration of these materials is short due to their volatility. This work introduces ionic liquids, a nonvolatile and stable material, to achieve durable toughening of the palm leaf manuscripts. We select 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]), one of the most used ionic liquids, as the subject of research. We find that [BMIm][BF4] does not alter the palm leaf manuscripts’ appearance and significantly improves their tensile strength and fracture toughness by 39.9 and 101.0%, respectively, while reducing the bending modulus by 25.7% and increasing the bending fracture deflection by 2.6 times. Notably, [BMIm][BF4]’s toughening effect for palm leaf manuscripts is sustainable for over 2 months, outperforming traditional methods that last only about 1 week. Even under harsh conditions, such as low humidity, high temperatures, alkalinity, and UV exposure, [BMIm][BF4] still maintains its effectiveness. Through the analysis of its composition, structure, and theoretical simulation, we reveal that [BMIm][BF4] penetrates the manuscripts, filling the pores between the inner structure of them and adsorbing strongly with cellulose. This enhances load transfer and reduces the stress concentration, resulting in increased toughness. This research provides innovative materials for palm leaf manuscript conservation and deepens our understanding of their mechanical properties.
研究领域:
文物保护
·
材料科学
·
植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Pengcheng Hu,Aonan Lai,Shufeng Zhou
The composite membrane of microcrystalline cellulose (MCC) with polyvinyl alcohol (PVA) was effectively synthesized using ionic liquids (ILs) as the solvent and dimethyl sulfone (DMSO) as the co-solvent through the phase conversion method. The effects of IL structure and the IL/DMSO mass ratio on the solubility of MCC were investigated. The findings indicated that the composite solvent functioned as a non-derivative solvent for MCC dissolution. The inclusion of DMSO decreased the viscosity of ILs and enhanced the rate of MCC dissolution. The solubility of MCC reached 14.5% (mass) when the mass ratio of [Bmim]Cl to DMSO was 1:1. The fabricated MCC membrane exhibited a smooth surface and a dense structure. PVA@MCC demonstrated exceptional mechanical properties and a uniform structure at a mass ratio of 2:1, with an elongation at break of 76% and a tensile strength of 14.6 MPa. The effects of antibacterial agents on the morphology, transmittance, mechanical properties, and antibacterial efficiency of PVA@MCC were investigated. The findings revealed that PVA@MCC fortified with clove oil showcased a flat and smooth surface, devoid of stratification or aggregation, and demonstrated superior mechanical properties compared to its counterparts with chitosan and ZnO additions. The elongation at break of PVA@MCC with clove oil increased to 137.6%, while its tensile strength decreased to 10.4 MPa. PVA@MCC with clove oil exhibited an antibacterial efficiency exceeding 68% against Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa, thereby extending the shelf life of cherry tomatoes by an additional four days at ambient temperature.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）