FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Guohe Chen,Wanling Xiao,Zhichao Lin,Mengzhen Xia,Yajie Xue,Jing Zhang,Sudu Bao,Junye Zhu,He Xie,Jianan Huang,Zhonghua Liu,Chao Wang
Abstact The jujube-like aroma is widely regarded as a noble aroma of Pu-erh tea (PET), but the key odor-active compounds remain unclear. Thus, the molecular sensory science approaches were used to decode the key odor-active compounds of PET with jujube-like aroma. Sixty-eight volatiles were identified in both PETs and jujube sample. Among them, 19 odor-active compounds were identified by relative odor activity value (ROAV) and Pearson correlation analysis. Aroma recombination experiment successfully reproduced the characteristic jujube-like aroma of PET. Omission experiments identified 17 aroma compounds have significant contributions ( p < 0.05), with 9 key odor-active compounds including 1-octen-3-ol, hexanal, etc. ( p < 0.001). This study elucidates the key odor-active compounds of jujube-like aroma in PET, to provide a theoretical reference for the targeting process regulation of the product.
研究领域:
食品科学
·
植物学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Qian Ren,Xiaoyu Zhang,Xin Zhang
Carbon fiber reinforced polymers (CFRP) are utilized in a variety of fields, but they are prone to delamination, which can cause substantial degradation to the properties and limit the usage. Here, Ni/PUF/PU@ER (NPPER) microcapsules were introduced into the composites to improve the interlaminar shear strength (ILSS). The PUF/PU@ER (PPER) microcapsules were first synthesized with epoxy resin as the healing agent, followed by electroless plating to deposit metal Ni on the surface. The microsphere compression tests demonstrated that the NPPER had superior strength (41.7 MPa) compared to the PPER. When 20 w.t.% PPER was added, the ILSS reduced to 32.8 MPa compared with the ILSS of the original specimen (36.7 MPa), and the healing efficiency increased to 81.8 %. However, due to the robustness of the NPPER, the ILSS increased to 40.3 MPa with 5 w.t.% NPPER, which was 9.8 % higher than that of the original specimen, and the highest healing efficiency was 52.0 % with 20 w.t.% NPPER. Furthermore, the NPPER with damage visualization was prepared using epoxy resin and 2′,7′-Dichlorofluorescein as core materials, which can be utilized to imply the occurrence and healing of damage by the change of color, promoting the development of intelligent and high-performance self-healing CFRP.
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DOI
高影响因子
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
·
2025
·
IF 3.4
Liwei Yang,Xinshuai Yan,Jianguo Duan,Kun Lei,Yaxiong Wang,Jianguo Cheng
Phase change materials (PCM) possess the issues of leakage, low thermal conductivity, lack of rigidity and poor photo thermal conversion ability. To overcome these challenges, we have successfully designed and prepared flexible PW/PU/CuNWs/MXene (PPCuM) composite phase change materials with high thermal conductivity by solution blending and vacuum impregnation by using polyurethane (PU), one-dimensional copper nanowires (CuNWs) as high thermal conductivity, and two-dimensional transition metal carbide/nitride (MXene) as fillers. Furthermore, PU based PCM is developed by adding MXene at different weight fractions and the influence of MXene content on PPCuM properties was studied. As expected, benefiting from the high aspect ratio and strong capillary force of the MXene as well as the interfacial interaction between the PCM molecule and MXene, the resulting PPCuM exhibit a large thermal conductivity (0.705 W·m−1·K−1), which is 332.5% higher than that of pure PW, high latent heat (155.42 J·g−1), mechanical strength reaches 81.83 KPa, and are form-stable upon heating up to 75°C. The solar simulator and thermal conductivity demonstrated a superior photo-thermal conversion capability and thermal networks for the developed PU based composite sample at 83.3 wt% of MXene. At the same time, MXene effectively improved the photo-thermal conversion capacity (91.35%) and heat transfer rate (2.91 J·s−1) of PPCuM, which was further confirmed by the surface temperature distribution results. In addition, PPCuM has excellent photo-thermal conversion efficiency, good chemical compatibility, crystallization properties, and acceptable thermal stability.
研究领域:
材料科学
·
能源工程
·
纳米技术
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DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2020
·Vol. 306
·期 2
·2000581
·
IF 3.853
Yingying Feng,Yexiang Cui,Mingjun Zhang,Meiling Li,Haiyan Li
Tung oil is used as a catalyst-free repair agent. Tung oil-loaded polyurethane (PU) microcapsules are prepared by interfacial polymerization in a SiO 2 -stabilized Pickering emulsion system, polyaniline (PANI) is deposited in situ on the PU microcapsule surface, and tung oil-loaded PU/PANI double-layer shell microcapsules are obtained. Synthesized PU/PANI microcapsules showed the characteristic dark-green color of conductive PANI. The average particle size is 31.1 ± 8.1 µm and the core content is 45.1 ± 4.3 wt%. The microcapsules have a good thermal stability, and the chemical structure of the PU/PANI wall and tung oil core is confirmed by Fourier transform infrared analysis. Self-healing anti-corrosion coatings are prepared by adding 10 wt% microcapsules into epoxy resin. The corrosion resistance properties of the self-healing coating are evaluated by immersing scratched coatings in 10 wt% NaCl solution for 15 days. The self-healing coating with 10 wt% tung oil-loaded PU/PANI microcapsules have the best anti-corrosion property, and slight corrosion do not occur until 15 days after immersion in salt solution. The self-healing and anti-corrosion mechanism are revealed. The tung oil core and the PANI wall of microcapsules contributed synergistically to the excellent self-healing and anti-corrosion properties of the coating through the formation of self-healing films and passivation layers.
研究领域:
材料科学
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化学工程
·
腐蚀科学
·
表面工程
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 315
·期 1
·103-110
·
IF 1.282
Wang Zhongtang,Lin Jinxian,Li Sixuan,Guo Qiuju,Huang Wenna,Wen Wei,Dan Guiping,Tan Zhaoyi
To rapidly assess the contamination of actinides in emergency water, a method was developed to simultaneously analyze U, Th, Pu and Am. The method consists of two steps: extraction chromatographic separation using UTEVA and DGA resins and isotopic determination of actinides by inductively coupled plasma mass spectrometry (ICPMS). The whole analytical procedure takes only 8 h and high chemical recoveries of actinides were obtained. The cross spectral interferences between actinides in ICPMS measurement were sufficiently removed. The accuracy was validated by analyzing IAEA-443 seawater sample. The low limits of detection of actinides allow this method to distinguish low level contamination.
研究领域:
环境科学
·
核化学
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产品关联
DOI
高影响因子
Food Analytical Methods
·
2016
·Vol. 9
·期 12
·3298-3309
·
IF 2.167
Wang Chao,Zhang Chen-Xia,Shao Chun-Fu,Li Chang-Wen,Liu Shun-Hang,Peng Xiao-Pei,Xu Yong-Quan
A simple and efficient fingerprint analysis method was developed and validated for the quality consistency control and authentication of Deepure instant pu-erh tea within different manufacturers using high-performance liquid chromatography (HPLC) coupled with chemometrics. To compare the HPLC fingerprint chromatograms between batches, varieties and manufacturers, the correlation coefficients of similarities of 60 samples and the relative peak areas of 11 characteristic compounds were calculated. Different pattern recognition procedures, including hierarchical cluster analysis, principal component analysis and partial least squares discriminant analysis, were then applied to classify the instant pu-erh tea samples according to their variety and manufacturer. Results showed that the developed method has potential application for the quality consistency evaluation and discrimination of instant pu-erh tea samples from similar products.
研究领域:
食品科学
·
分析化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 15
·23364-23376
·
IF 4.672
Jiahui Yan,Dechao Hu,Wenshi Ma,Weimin Chen
Summary Microencapsulated phase change materials (MEPCMs) have attracted extensive attention due to their ability to encapsulate and protect core materials. Herein, this paper presents the successful preparation of an environmentally friendly bio-based polyurethane (PU) by utilizing soy polyols as raw material and utilizing it innovatively to achieve the microencapsulation of phase change materials (PCMs). The surface morphology, thermal properties, particle size and particle size distribution of MEPCMs were comprehensively characterized and analyzed. Especially, a systematic study was conducted on MEPCMs in terms of their structure and properties, depending on different preparation conditions. According to the results, microcapsules obtained with a core-shell ratio of 1:1 and mechanical stirring speed of 300 rpm display good spherical shape, smooth surface, and narrow particle size distribution. Moreover, the melting enthalpy of microcapsules can reach 91.4 J/g when the core material content is 48.4%. Moreover, compared to pure paraffin, the prepared microcapsules have superior thermal stability and high reliability, which shows promising energy storage efficiency of 91.5% even after 50 hot-cold cycles.
研究领域:
材料科学
·
热能工程
·
能量存储
·
环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·52958-52968
·
IF 5.8
Yuan Zhengqiu,Wu Yangfeng,Zeng Jianxian,Li Xiaoyan,Zang Kairong,Zhou Hu
In this study, hydrophobic polymer composite films based on polyurethane (PU) were prepared for oil-water separation. Hydrophilic fumed silica (nano-SiO 2 ) was introduced as reinforcing filler, and silane coupling agent (KH550) was used to crosslink PU with nano-SiO 2 in situ for enhancing the nano-SiO 2 dispersion in the films. The microscopic morphology, crystalline structure, and hydrophobic properties of the films were characterized by using scanning electron microscopy, X-ray diffraction, FTIR spectroscopy, water contact angle, and water absorption tests. The results showed that the hydrophobicity of the nano-SiO 2 /PU composite films increased with the addition of nano-SiO 2 . KH550 not only significantly promoted the crosslink action between PU and nano-SiO 2 but also enhanced the dispersion of nano-SiO 2 in the composite films. Moreover, the pore structure of the prepared films was changed with the addition of nano-SiO 2 and KH550, which greatly improved the hydrophobicity. The test results for oil-water separation performance showed that the prepared composite films can efficiently separate the oil from oil-water mixtures with good repeatability.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Zhibiao Guo,Mingkun Wang,Lei Qiao,Jianxiang Wang,Zhiwei He
Frequent oil spills and the discharge of industrial oily wastewaters have become a serious threat to the environment, ecosystem, and human beings. Herein, a photothermal, magnetic, and superhydrophobic PU sponge decorated with a Fe3O4/MXene/lignin composite (labeled as S–Fe3O4/MXene/lignin@PU sponge) has been designed and prepared. The obtained superhydrophobic/superoleophilic PU sponge possesses excellent chemical stability, thermal stability, and mechanical durability in terms of being immersed in corrosive solutions and organic solvents and boiling water and being abrased by sandpapers, respectively. The oil adsorption capacities of the S–Fe3O4/MXene/lignin@PU sponge for various organic liquids range from 29.1 to 70.3 g/g, and the oil adsorption capacity for CCl4 can remain 69.6 g/g even after 15 cyclic adsorption tests. The separation efficiencies of the S–Fe3O4/MXene/lignin@PU sponge for n-hexane and CCl4 are higher than 98% in different environments (i.e., water, hot water, 1 mol/L NaOH, 1 mol/L NaCl, and 1 mol/L HCl). More importantly, the introduction of three light absorbers (i.e., Fe3O4, MXene, and lignin) into the S–Fe3O4/MXene/lignin@PU sponge shows a synergistic effect in the photothermal heat conversion performance, and the maximum surface temperature reaches 64.4 °C under sunlight irradiation (1.0 kW/m2). The separation flux of the S–Fe3O4/MXene/lignin@PU sponge for viscous LT147 vacuum pump oil reaches 35,469 L m–2 h–1 under sunlight irradiation, showing an increase of 27.3% compared to that of oil adsorption processes without the photothermal effect. Thus, the rational design of superhydrophobic sponges by introducing proper photothermal heat absorbers provides new insights into facile and cost-effective preparation of sponges for efficient oil/water separation.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Si-Yuan Zhou,Lei Li,Enzehua Xie,Mei-Xi Li,Jian-Hua Cao,Xiu-Bin Yang,Da-Yong Wu
The occurrence of acute thrombosis, directly related to platelet aggregation and coagulant system, is a considerable reason for the failure of small-diameter vascular grafts. Heparin is commonly used as a functional molecule for graft modification due to the strong anticoagulant effect. Unfortunately, heparin cannot directly resist the adhesion and aggregation of platelets. Therefore, we have prepared a heparin-aspirin compound by coupling heparin with aspirin, an antiplatelet drug, and covalently grafted it onto the surface of polycaprolactone/polyurethane composite tube. In this way, the graft not only showed a dual function of both anticoagulation and antiplatelet, but also effectively avoided the rapid drug release and excessive toxicity to other organs caused by simple blending the medicine with material matrix. The compound retained the original function of heparin, showing good hydrophilicity and biocompatibility, which could promote the adhesion and proliferation of endothelial cells (ECs) and facilitate the process of tissue regeneration . What's more, the compound showed more effective than heparin in reducing platelet activation and preventing thrombosis. The graft modified by this compound maintained completely unobstructed for one month of implantation, while severe obstruction or stenosis occurred in PCL/PU and PCL/PU-Hep lumen at the first week, verifying the effect of the compound on preventing acute thrombosis. In general, this study proposed a designing method for small-diameter vascular graft which could prevent acute thrombosis and promote intimal construction.
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yimeng Li,Mengqi Shan,Jiamin Peng,Lizhen Lan,Leqian Wei,Lamei Guo,Fujun Wang,Ze Zhang,Lu Wang,Jifu Mao
Highly stretchable and conductive fibers as crucial components for stretchy electronic textiles have developed rapidly in recent years, benefiting from the design of stretchable structures. However, routes toward continuous production via simpler fabrication processes remain a huge challenge that has greatly limited its widespread application. In this work, we reported an intrinsically stretchable multifilament with both highly stretchable and conductive (537 S m −1 under 100 % strain) polypyrrole (PPy) coating enhanced by sodium sulfosalicylate (NaSSA) as a dopant. Based on this, a post-drawing method was further proposed to continuously fabricate stretchable conductors with PPy buckling on surface. The PU multifilament with buckle PPy coating (PU@bPPy) exhibited a high and ultra-stable conductance, showing initial conductivity at 529 S m −1 and only 3.5 % change in resistance after > 6500 stretching cycles at 50 % strain. Moreover, the PU@bPPy could be easily integrated into electronic textiles as stretchable electronic circuits and stretchable joule heaters.
研究领域:
材料科学
·
纺织工程
·
电子学
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产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zhihua Zhao,Yao Wang,Bo Li,Pu Chen,Guixin Jin,Xiaoqing Shen,Zhigang Shao,Lan Wu
With the rapid advancement of wearable technology, multifunctional sensors have garnered significant attention due to their potential applications in environmental monitoring, health diagnostics, and human−machine interaction. Despite their promise, challenges, such as limited flexibility, insufficient sensitivity, and complex production processes, have hindered their practical deployment. This study presents the fabrication of a multifunctional flexible sensor based on PU-supported Ti3C2Tx/TiO2/PPy yarns for both ammonia (NH3) gas sensing and human motion detection. Key innovations include the incorporation of polypyrrole (PPy) into the Ti3C2Tx MXene structure and the optimization of titanium dioxide (TiO2) content through varying hydrothermal times, which significantly enhance the gas sensing performance. The sensor demonstrates exceptional sensitivity and selectivity toward NH3, with a rapid response and recovery times. Additionally, the PU-supported composite yarns exhibit excellent mechanical flexibility and durability, maintaining stable performance under repeated stretching and bending cycles. In human motion detection, the sensor shows high sensitivity and reliable performance in monitoring various physical activities, making it highly suitable for applications in wearable electronics. These features ensure the sensor’s applicability in diverse settings, promoting safety and health in environments with potential ammonia exposure and enhancing human−machine interactions through accurate motion monitoring.
研究领域:
材料科学
·
传感技术
·
环境监测
·
可穿戴设备
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）