FOOD RESEARCH INTERNATIONAL
·
2023
·
IF 8.1
Wanmei Lin,Yifan Zhang,Jihong Huang,Zhonghong Li
A pH-responsive double-layer film comprising chitosan (CS), zein (Z), curcumin-β-cyclodextrin complex (Cur- β-CD), alizarin (AL) and cinnamaldehyde (CIN) was developed to detect spoilage and prolong the shelf life of pork. The outer Z/AL is the colorimetric responsive and highly protective outer layer, while the CS/Cur- β-CD/CIN is the fluorescence responsive and functional layer. The CS/Cur- β-CD/CIN-Z/AL film demonstrated excellent barrier properties against oxygen (8.48 × 10 -13 g (m s Pa) -1 ) and water (2.42 × 10 -11 g (m s Pa) -1 ) primarily due to the polar interactions in the Z structure and its hydrophobic nature. The addition of AL and Cur provided the CS/Cur- β-CD/CIN-Z/AL film with pH colorimetric and fluorescence response capabilities, respectively. Furthermore, the inclusion of Cur- β-CD, CIN and AL significantly enhanced the film’s antioxidant and antibacterial properties, with radical scavenging rates of 79.29 % (DPPH) and 89.84 % (ABTS), as well as antibacterial efficiencies of 96.2 % ( S. aureus ) and 85.78 % ( E. coli ). To test the effectiveness of the double-layer film, a freshness monitoring and maintenance experiment was conducted on pork stored at 4 °C for 8 days. Various parameters of pork, including surface color, pH value, total volatile bases nitrogen (TVB-N), total viable counts (TVC), thiobarbituric acid reactive substance (TBARS), hardness and springiness, were measured, along with the color and fluorescence intensity (FL) of the film. The shelf life of the pork was extended by at least 2 days compared to the control group, and the pork was considered inedible if ΔE ≥ 12 or FL intensity ≤ 2160. Overall, this food packaging film shows promise in simultaneously monitoring and maintaining the freshness of pork.
研究领域:
食品科学
·
材料科学
·
生物工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Xiao Xie,Qian Yang,Qiong Sun,Na Song,Liyan Yu,Lifeng Dong
Low water flux and poor chlorine resistance have become barriers to the applications of polyamide reverse osmosis (RO) membranes. Here, we design and develop a novel RO membrane with high permeability and self-healing chlorine resistance capability by doping alkaline-responsive polymer nanocontainers into the polyamide layer. The nanocontainer is prepared through chemical adsorption and electrostatic self-assembly with titanium dioxide (TiO 2 ) as the core, calcium alginate (CA) and chitosan (CS) as the repair materials, and polyaspartic acid (PASP) as the responsive shell. In addition to increasing water transport through the channels, the PASP shell of the nanocontainer reacts with alkali during conventional alkaline cleaning and thereby the CA and CS are released to precisely repair the chlorinated polyamide and restore the NaCl rejection of the RO membrane. Upon release of the nanocontainer, TiO 2 is also exposed to make the membrane antibacterial. The nanocontainer doping significantly enhances surface roughness of the RO membrane, and the water permeability of the thin-film nanocomposite membrane doped with 0.005 wt% nanocontainers is increased by 43.71% to 5.03 L/m 2 h bar compared with the blank membrane, while performing an excellent NaCl rejection of 98.02% and maintaining 95.95% after 8000 ppm h active chlorine treatment and alkaline cleaning process.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yi-Heng Wang,Yang Liu,Jin Tong,Shu-Yan Yu
The cyclometalated Ir(III) complex, Ir(ppy) 2 (phen-dipzH 2 ) ( Ir-1 ), was synthesized using the ligand 3,8-di(1H-pyrazol-4-yl)-1,10-phenanthroline (phen-dipzH 2 ) and the auxiliary ligand 2-phenylpyridine (ppy). Crystal structure analysis reveals that each {Ir(ppy) 2 } + unit is coordinated by a neutral phen-dipzH 2 ligand in Ir-1 . The packing arrangement of Ir-1 displays aromatic stacking interactions and [C–H…N] hydrogen bonding interactions between the [Ir(ppy) 2 (phen-dipzH 2 )] + cations. In solution, Ir-1 exhibits emission switching induced by acid/base changes, with the emission wavelength shifting from 562 nm (yellow color) in the neutral state to 618 nm (pink color) under acidic conditions and to 528 nm (gray color) under basic conditions. These shifts are attributed to the protonation and deprotonation of the pyrazole units, which is confirmed by 1 H NMR spectra. Additionally, Ir-1 demonstrates high selectivity and sensitivity toward Cu 2+ ions, with a detection limit as low as 9.47 μM compared to other metal ions. The acid/base-responsive phosphorescence of Ir-1 has also been successfully utilized in the development of paper strip-based devices for urea detection.
研究领域:
化学
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材料科学
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分析化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Ying He,Ran Wang,Tifeng Jiao,Xiaoya Yan,Mingli Wang,Lexin Zhang,Zhenhua Bai,Qian Zhang,Qiuming Peng
The useful functionalization and self-assembly of two-dimensional layered materials like hydrotalcite (LDH) are critical for the wide application of nanomaterials. In this work, some self-assembled Langmuir films of ion-exchanged LDH and dyes with different molecular structures were prepared by the Langmuir–Blodgett (LB) technique. The aggregation states of used dye molecules on the surface of the obtained membrane and the structures/properties of the membrane were studied. The hydroxyethyl sulfonate-inserted LDH (LDH-Ise) nanosheets were able to induce the dye formation of highly ordered H- and/or J-aggregate structures. Surface-enhanced Raman scattering (SERS) spectroscopy results demonstrated the uniformity and repeatability of the film. Interestingly, the good acid–base gas response characteristics of present LDH-Ise/dye LB films were investigated by UV–vis and Fourier transform infrared (FT-IR). The present research work provides new clues for the development of gas sensors and chemical switches as well as the preparation of effective functional self-assembled films.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2017
·Vol. 19
·期 9
·1294-1303
·
IF 3.474
Wenyan Fang,Yuyang Zhang,Gaobin Zhang,Lin Kong,Longmei Yang,Jiaxiang Yang
A highly fluorescent emissive difluoroboron complex (TC) was designed, synthesized and characterized. The absolute fluorescence quantum yields of TC are 33.0% in the solid state and 26.0% in the solution state. The results of X-ray diffraction analysis demonstrate that the rigid structure, the intermolecular hydrogen bonding and the well-ordered as well as loose molecular packing are the major reasons for the high fluorescence emission. Moreover, the colors and fluorescence emission of TC can be switched by external stimuli including grinding and acids/bases. Powder X-ray diffraction (PXRD) investigation verifies that the crystalline–amorphous state transformation between the original and ground states might be attributed to the mechanochromic luminescence properties. The high fluorescence emission and multi-stimuli-responsive fluorescence properties reveal that TC can be used as rewritable information storage, security ink and a fluorescence indicator for acids/bases.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Na Song,Wei Shan,Xiao Xie,Qiong Sun,Liyan Yu,Lifeng Dong
Poor chlorine resistance is a major factor affecting service life of aromatic polyamide reverse osmosis membranes . Herein, alkali-responsive polymer nanocontainers are designed and constructed via emulsified cross-linking and electrostatic self-assembly of sodium alginate , chitosan, and polyaspartic acid around chitosan nanoparticles , and the nanocontainer is integrated into polyamide layer of thin film composite membranes. The nanocontainer does not only provide more channels for water molecules to improve membrane permeability, but also during routine alkaline washing process, polyaspartic acid at the outer layer reacts with alkaline agent to release healing agents: sodium alginate and chitosan to heal damaged sites to restore membrane performances . For example, with the addition of 0.005 wt% nanocontainers, water flux was increased by 32.8% compared to pristine membranes without sacrificing NaCl rejection. After soaking in alkaline cleaning solution, NaCl rejection of the membrane degraded by 2000 ppm active chlorine can be recovered by 97.3%. Therefore, self-healing nanocontainers can greatly improve chlorine resistance, water flux, and stability of polyamide reverse osmosis membranes.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2018
·Vol. 13
·期 9
·1206-1212
·
IF 3.692
Xiaojun Wang,Chang Gu,Hongzhi Zheng,Yu-Mo Zhang,Sean Xiao-An Zhang
A multi-state and multi-stimuli-responsive oxazine molecular switch that combines an electro-base property and sensitive base/acid-responsive properties was designed and synthesized. The multi-state structures of the molecular switch, with different colors, were predicted by comparing the optical properties with reference molecules and confirmed by using NMR spectroscopy. The color-switching mechanism under stimulation with acids and bases was investigated by using DFT calculations. Three single states can be obtained and the switching is unidirectional under acid and base stimulation. The electrochromic phenomenon of the molecular switch, which combines its electro-base and base-sensitive properties, was demonstrated. An electrochromic device that exhibited good electrochromic properties with excellent reversibility (2000 cycles) and high coloration efficiency (804 cm 2 C −1 ) was successfully constructed.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Journal of Central South University
·
2024
·Vol. 31
·期 10
·3463-3481
·
IF 3.7
Ji Wen-hui,Cao Lin,Ji Xiao-hong,Peng Li-ming,Myronyuk Oleksiy,Han Dong-xiao,Pei Yan-tong,Li Wei-hua,Wang Wei
In this paper, 1-butyl-3-methylimidazole tetrafluoroborate ([BMIM]BF 4 ) is used as corrosion inhibitor. Polyacrylonitrile (PAN) is used to load the corrosion inhibitor. PAN/[BMIM]BF 4 hybrid nanofibers are successfully synthesized by electrospinning technology. The alkyd varnish is coated on the fiber membrane to prepare a composite coating, and then a series of tests are carried out on the self-healing and anticorrosive performance of the composite coating. It is observed by scanning electron microscope that the fiber morphology is stable and there is no bead-like structure. The composition of the composite fiber is analyzed by Fourier infrared spectroscopy, and it is confirmed that the hybrid nanofiber was successfully prepared. 3D laser confocal scanning microscope was used to observe the corrosion morphology and profile of the carbon steel. The composite coating shows good self-healing performance. [BMIM]BF 4 can form a protective film on the surface of the bare carbon steel substrate through physical adsorption or chemical adsorption in an alkaline environment. Electrochemical impedance spectroscopy was tested and analyzed. It is found that the maximum corrosion inhibition efficiency of the coating is 88.5% in 3.5 wt.% alkaline NaCl solution. Compared with the blank coating without nanofibers, the composite fiber varnish composite coating exhibits good self-healing and anti-corrosion properties.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Ji Ming-Jun,Zhao Wen-Long,Li Meng,Chen Chuan-Feng
Circularly polarized luminescence (CPL) in solution offers several advantages. However, it remains challenging for organic molecules to achieve circularly polarized luminescence with high dissymmetry factor ( g lum ) in solution. Herein, a general strategy is developed by placing chiral nematic liquid crystals (N*-LCs) behind the solution of achiral organic molecules. The selective reflection-transmission mechanism of solution-N*-LC composite system enables the generation of full-color and white circularly polarized light with | g lum | even reaching 2.0. This strategy demonstrates versatility, being applicable to both aqueous and organic solutions, and effectively achieving the circularly polarized luminescence of multiple molecules with high g lum values. Additionally, CPL switching and logic gate applications are successfully realized by leveraging the selective reflection-transmission mechanism of N*-LCs and the reversible acid-base responsiveness of the solution systems. This work provides a general and robust strategy for achiral organic molecules to achieve circularly polarized luminescence with high | g lum | values in solutions.
研究领域:
材料科学
·
光学
·
有机化学
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产品关联
DOI
PubMed
高影响因子
Sustainable Materials and Technologies
·
2025
·
IF 9.2
Zifeng Yang,Haonan Zhang,Donglai Zhang,Yun Fang,Qiuyu Xiong,Bin Yu,Jingli Cheng,Liqing Li,Qunzhen Guo,Jinhao Zhao
Soybean root rot, primarily caused by Fusarium and Phytophthora spp., severely damages root tissues, impairs nutrient uptake, and leads to plant death, particularly in saline-alkaline soils, where high pH, salt stress, and deteriorated soil conditions reduce the stress resistance of soybean plants. Conventional chemical treatments are less effective owing to the poor vertical mobility of fungicides in alkaline soils. Stimuli-responsive controlled-release formulations can improve the bioavailability of active ingredients, reduce application frequency, and minimize environmental impact. Here, we present a sustainable, biodegradable, and environmentally benign delivery system based on zein, a plant-derived protein. Zein was modified with non-toxic succinic anhydride to improve water dispersibility, resulting in a green carrier (SZ) with reduced ecological risk. The UV-sensitive fungicide difenoconazole (Di) was encapsulated into this carrier via nanoprecipitation to construct a stimuli-responsive nano-enabled delivery system (Di@SZ). Di@SZ exhibited alkaline-triggered release, with rapid release in alkaline conditions. Compared to the commercial emulsifiable concentrate (EW), Di@SZ nanoparticles showed a 3.03-fold improvement in UV resistance. They enhanced vertical mobility of Di in soil, enabling targeted root delivery during drip irrigation in saline-alkaline soils. Pot experiments demonstrated that Di@SZ provided stronger and longer-lasting protection against soybean root rot than EW. Moreover, the system exhibited superior biosafety, with 2.77-fold lower toxicity to soil earthworms relative to EW. These findings underscore Di@SZ as a sustainable, materials-based plant protection technology that integrates renewable resources, reduces environmental impact, and enhances efficacy, offering a promising approach for eco-friendly disease management in agriculture.
研究领域:
植物病理学
·
农业纳米技术
·
药物缓释
·
环境友好材料
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土壤修复
·
作物保护
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 39
·期 2
·266-275
·
IF 2.726
Xiong Xiaoyan,Li Xiaobin,Zhu Zifan,Zhang Ending,Shi Jun,Lu Mangeng
Cationic water-based polyurethane(CWPU) was synthesized to explore aloe-emodin modifies to obtain CWPU materials with better comprehensive performance. It provides a simple way to synthesize antibacterial waterborne polyurethane, which is to introduce the end-blocking group of herbal extracts into the structure. It contains synergistic antibacterial effect of herbal antibacterial and quaternary ammonium ion on Escherichia coli . It makes the material resist the erosion of bacterial, and increase the service life of materials. When the pH value of the environment changes, the UV absorbance of the aloe-emodin modified cationic water-based polyurethane(AE-CWPU) also changes. Therefore, within a certain detection range, AE-CWPU has great applications in the field of smart response materials. The modified thermodynamic properties have been improved, and the mechanical properties basically maintained the maximum stress, and the elongation at break was reduced.
研究领域:
高分子科学
·
材料科学
·
化学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）