EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Yunfeng Shi,Mengyue Wang,Linzhu Zhou,Xueqi Shen,Jinhao Wang,Nannan Mo,Guo Zhao,Su Yang,Xinyuan Zhu,Andrew M. Smith
A new strategy for the construction, release and cellular imaging application of triethylamine-responsive fluorescent quantum dots (QDs) based on supramolecular self-assembly has been described. The supramolecular self-assembly (HPEI/SA), which was constructed through the electrostatic interactions between terminal amine groups of hyperbranched polyethylenimines (HPEI) and carboxylic acid groups of stearic acid (SA), first captured aqueous Zn 2+ ions into the hydrophilic dendritic core and subsequently encapsulated QDs/S 2- by the complexation interactions and reactions between Zn 2+ and S 2- on QDs. Due to the pH-responsive property of the HPEI/SA supramolecular self-assembly, the fluorescence of encapsulated QDs is sensitive to the triethylamine/SA mole ratio, and the encapsulated QDs can be released to the aqueous phase by cleaving HPEI/SA. The resulting fluorescent QDs/HPEI nanocomposites show promising prospects in bioimaging.
研究领域:
生物化学
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材料科学
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医学影像学
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产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 15
·e202405960
·
IF 2
Xiaoyan Xiong,Yunpeng Gong,Yue Hu,Xu Ma,Hangzhou Wang,Cunzhi Li,Jianrong Ren,Chenguang Kong,Youcheng Huang,Shumin Jiang,Yufang Chen,Tao Jin
Graphical A nanoscale hollow tubular-structured Ta/Organo-In composite was synthesized. The material exhibited a response value of 92.34 to 50 ppm triethylamine at 190 °C, along with superior comprehensive performance in stability, sensitivity, and selectivity. Remarkably, it demonstrated detectable responses even at room temperature. The development of chemical sensor technology has been significantly advanced amine-responsive materials with the characteristics of rapid response, stability, and low-power consumption. This study synthesize Organo-In materials, and further explored the composite formation between tantalum (Ta) powder, and the organometallic indium (Organo-In). The morphology and structure of the resulting material were characterized using SEM, TEM, XRD, HAADF, and XPS. Results demonstrate the Ta/Organo-In composite's exceptional triethylamine (TEA) selectivity: Showing 92.34 response to 50 ppm TEA at 190 °C with 9s/486 s response/recovery times, outperforming aldehydes/ketones/aromatics. Notably, the Ta/Organo-In prepared by the method in this study showed a response value of approximately 3.4 toward 50 ppm TEA at room temperature (about 25 °C), and the response values remained stable after 10 consecutive cycles, indicating the material's excellent reliability and potential for low-power applications in real-time TEA monitoring devices at room temperature. The selectivity and continuous gas sensing performance of Ta/Organo-In at room temperature are both acceptable. Furthermore, within the concentration range of 1–500 ppm, the response values of the Ta/Organo-In material to TEA followed a Logistic curve fitting with an R 2 of 0.99644. Finally, the selective response mechanism of materials to TEA was discussed.
研究领域:
材料科学
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化学传感器技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yingnan Liu,Yaqing Xiao,Minghui Shang,Yuting Zhuang,Li Wang
The method of monitoring the freshness of seafood is not satisfactory for ensuring food safety. Here, we develop a filter membrane-based smart fluorescent tag with excellent biogenic amine response, which can monitor the freshness of seafood in real time and visually. We use green fluorescent fluorescein as an indicator and red fluorescent carbon quantum dots (RQDs) with aggregation-induced emission property as an internal reference. After simple mixing, they are deposited on the commercial filter membrane by physical deposition method to prepare the fluorescent tag. When amine molecules are present, the molecular conformation of fluorescein changes and the fluorescence increases rapidly, while RQDs have no obvious response, thus achieving a clear fluorescence color response to biogenic amines. Under UV light of 254 nm and 365 nm, the fluorescent tag showed sensitive, rapid, and color-responsive to ammonia in a wide range of 250–2.5 × 10 4 ppm. To further verify the practical application potential, the fluorescent tag was used to monitor the freshness of shrimp and crab in situ in real time, and satisfactory results were achieved. More importantly, owing to the reversible conformational change of fluorescein, the fluorescent tag can be reused and manufactured at low cost, making it a more attractive platform for freshness monitoring in the field of food safety.
研究领域:
食品安全
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生物化学
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分析化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Futao Sai,Haitao Zhang,Jianbo Qu,Jianyong Wang,Xiuzhong Zhu,Yang Bai,Peng Ye
Currently, the preparation and application of functional waterborne polyurethane has become a research hotspot in the field of polyurethane. In the present work, Different weight ratios of diacetyl oxime and coumarin diol were used as the reactive filler with isophorone diisocyanate (IPDI) and Poly propylene glycol (PPG) to prepare superior amine-response, self-healing and recyclable waterborne polyurethane films (WPU-x). Dynamic mechanical analysis was carried out to identify the self-healing properties of WPU-x. It was revealed that the WPU-2 film show an excellent self-healing capability based on the combination of the mobility of the soft segment, dynamic reaction of oxime carbamate bond and hydrogen bonds, and the mechanical properties self-healing efficiency can reach 91.11% after self-healing at 90 °C for 7 h. UV testing and fluorescence imaging results shown that WPU-2 film exhibit a rapid and concentration-dependent response to dimethylamine (DMA), and it also shows varying degrees of response to other organic amines. The WPU-2 film could be readily applied in cold chain transportation of shrimp and fish for real-time and visual monitoring the freshness of seafoods. At the same time, the WPU-2 film could be recycled via hot-pressing and solution casting. Therefore, this strategy provides some insights for preparing multi-functional waterborne polyurethane.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Polymer Chemistry
·
2017
·Vol. 8
·期 19
·2997-3005
·
IF 5.375
Meng Shan,Chu Gong,Bingqiang Li,Guolin Wu
An injectable polyethylene glycol (PEG) hydrogel was successfully prepared via borate–catechol complexation using dopamine functionalized 4-armed PEG (4-arm-PEG-DA) and phenylboronic acid modified 4-armed PEG (4-arm-PEG-PBA). The hydrogel was formed within 10 s by mixing 15 wt% 4-arm-PEG-DA with 15 wt% 4-arm-PEG-PBA buffer solutions at pH 9.0. The hydrogel was characterized by Fourier transform infrared (FT-IR) spectroscopy, rheological measurements, scanning electron microscopy (SEM) and lap shear strength tests. Furthermore, pH, glucose and dopamine responsiveness of the hydrogel based on phenylborate–catechol complexation was demonstrated by degradation experiments and drug release tests. The lap shear strength tests indicated that the hydrogel possessed the ability of self-healing which was bestowed by the phenylborate–catechol dynamic covalent bond. Moreover, the hydrogel could serve as a decent bio-adhesive due to its adhesion properties on different substrates especially the porcine skin. In vitro cytotoxicity tests demonstrated the excellent cytocompatibility of the hydrogel. The results of all the experiments indicate that our newly developed multi-functionalized hydrogel can have potential applications in biomedical fields such as drug delivery, tissue engineering, and bio-adhesives.
研究领域:
生物材料
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药物递送
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组织工程
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DOI
高影响因子
FOOD CHEMISTRY
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2022
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IF 9.231
Yingnan Liu,Wanqi Jiang,Zan Yang,Fei Tong,Lei Wang,Lu Zhu,Zhenyu Yu,Mingming Zheng,Yaqing Xiao,Yibin Zhou
A zein-based film functionalized with fluorescent dyes was constructed for visual, real-time monitoring of seafood freshness. The addition of fluorescent dyes had no significant effect on the mechanical property or water sensitivity of the zein-based film, and the fluorescent film exhibited dual emission response. When exposed to ammonia, fluorescein fluorescence increased whilst the fluorescence of rhodamine B was undisturbed. The fluorescent film presented a clearly distinguishable color transition from pink to green. Sample detection tests showed the fluorescent film served successfully as a response label for on-site visual detection of seafood freshness. Development of this intelligent fluorescent film provides a new platform for food safety and quality monitoring, benefiting economic value and public health.
研究领域:
食品科学
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材料科学
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生物技术
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产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
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2025
·
IF 6.3
Zhijian Wang,Lin Wang,Jingze Guo,Shiyao Wang,Yisheng Chen
Concerning the massive economic loss and potential food-borne diseases due to meat spoilage, real-time and non-destructive surveillance techniques able to provide early spoilage alert became increasingly important in meat supply chain. Here, a colorimetric sensor array (CSA) consisted of 10 amine-responsive dyes encapsuled in a metal−organic framework material ZIF-8 (ARD@ZIF-8) mimicking human olfactory system was designed and fabricated for visual evaluation of meat freshness. It was demonstrated that the encapsulation in ZIF-8 significantly enhanced the sensitivity and stability (ΔE < 5) of amine-responsive dyes. Then, the CSA in size of 40×10 mm was prepared by programmable printing with high precision and uniformity. Upon a short exposure within 16 min to biogenic amines (BAs), sensitive colorimetric changes became straightforward for eye-inspection, which was further digitally documented and quantified with a smartphone. The detection linear range for the targeted BAs (ammonia, dimethylamine, trimethylamine) was 50-50000 μg/kg, with limits of detection at 7, 8, and 8 μg/kg, respectively. Furthermore, the optimized detection was validated with different meat samples, agreeing well with the data by the TVBN assay ( R 2 >0.969). Via chemoichiometric pattern recognition (principal component analysis and hierarchical cluster analysis), the status of meat freshness at different shelf-life stages could be clearly distinguished. Moreover, the CSA displayed high reproducibility (RSD < 5%) as well. Reaching an ideal balance in simplicity, reliability and cost-efficiency, the CSA might be valuable to next generation of intelligent food package enabling consumer-level monitoring of meat quality.
研究领域:
食品安全
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传感器与生物传感器
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材料科学
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分析化学
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智能包装
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食品质量监测
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Yi Sun,Wei Zhang,Shan Lu,Wenhua Miao,Meiling Chen,Fei Liu,Haining Na,Jin Zhu
Herein, a novel cellulose-based fluorescent material with amine-responsive property was developed in a CO 2 switchable solvent for the contactless, real-time, and visual monitoring of the freshness of shrimp , crab, and fish. A nucleophilic cellulose carbonate intermediate is in-situ formed upon dissolution of cellulose in the CO 2 switchable solvent, which is adopted for the highly effective grafting of poly( l -lactic acid) and amine-responsive fluorescent reagent 7-amino-4-(trifluoromethyl) coumarin onto the cellulose backbone via ring opening polymerization and nucleophilic substitution reaction, respectively. The product has good processibility, and sensitive and reversible fluorescent responsive towards ammonia. The fluorescent intensity of the material decreased significantly and its fluorescent color changed from blue to cyan, when the aquatic products got spoiled. This study indicates that the CO 2 switchable solvent has great potential for the modification of cellulose with various functionality by taking advantage of the highly active nucleophilic cellulose carbonate intermediate.
研究领域:
材料科学
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化学工程
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食品科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Food and Bioprocess Technology
·
2025
·
IF 5.8
Liu Danfei,Li Xiaoxuan,Zhang Chuanxiang,Chen Yuyang,Zhou Wenxuan,Zhang Changfan
In this study, amine-responsive bilayer films (agar/black wolfberry anthocyanin (AG/BWA) and agar/black wolfberry anthocyanin/sodium alginate/hydrophobically modified TiO 2 nanoparticles (AG/BWA/HM)) were fabricated. These films consist of a sensing layer made of agar/anthocyanin and a protective layer composed of sodium alginate and hydrophobically modified TiO 2 nanoparticles (HMTI). The fabrication process involved the solvent evaporation method and screen-printing technique, with anthocyanins extracted from black wolfberry serving as the key component in the sensing layer. The prepared films were characterized by FTIR, SEM, XRD, and UV spectroscopic techniques. Water contact angle measurements showed that the AG/BWA/HM film was hydrophobic (> 90°). The incorporation of anthocyanins increased the tensile strength of the films by 6–10 MPa, the elongation at break by 3–6%, and the water solubility by 4–15% compared to control films (agar film). Light stability and storage stability tests revealed that the incorporation of hydrophobically modified TiO 2 effectively enhanced the stability of the films. When exposed to different pH values, the bilayer films showed different color changes, with a significant change from acidic to basic. The ammonia vapor test showed that the sensitivity of the AG/BWA/HM film was improved by 20.1% compared to the AG/BWA film. The indicator film was used to monitor the deterioration of pork at room temperature (25 ℃), and the color of the AG/BWA/HM film changed significantly with the increase of total volatile basic nitrogen (TVBN) of pork stored at room temperature (25 ℃) for 24 h as the freshness of pork changed gradually, indicating the promising application of this double-layer indicator film in the monitoring of meat freshness. Graphical
研究领域:
食品科学
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材料科学
·
分析化学
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纳米技术
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食品安全
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高分子科学
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传感器技术
✓ 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）