REACTIVE & FUNCTIONAL POLYMERS
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2025
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IF 5.1
Jianlong Wang,Tongtong Zhang,Hongxi Zhu,Xiaoming Cao,Teng Ma,Zhijia Zhang,Lin Wang,Xiaoji Liu,Qiang Wang,Guojun Wang,Songsong Zhang,Hao Wei
Interpenetrating polymer networks (IPNs) constructed from polyurethane (PU) and epoxy resin (EP) are high-performance polyester-based materials. In this study, we systematically investigated the effect of variation in the PU component, including its content and molecular weight, on the property of EP/PU IPNs. The focus was on the changes in dynamic mechanical properties, characterized and analyzed through dynamic parameters under different modes, to reveal the influence of the PU component on the energy dissipation capacity of the material. Additionally, we conducted performance tests on IPNs materials constructed with different polyols, with a particular emphasis on dynamic mechanical property, and identified the superior PCL-2000 series (the effective damping temperature range △T is close to 50 °C in tensile mode, and the peak of the loss factor in compressive mode still reaches nearly 0.8). These findings constitute a comprehensive study on the dynamic mechanical property of EP/PU-based materials and provide crucial data support and empirical analysis for the development of high-energy functional material.
研究领域:
高分子科学
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材料工程
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动态力学分析
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功能材料
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Liuna Wei,Ou Hu,Hengye Chen,Tianming Yang,Yao Fan,Lu Xu,Lei Zhang,Wei Lan,Yuanbin She,Haiyan Fu
Pu-erh tea is a unique post-fermented tea with special quality and unique aroma characteristics, which are achieved by aging as part of the tea-making processing in China. In this work, we developed a new method, based on the combination of the mid-infrared (MIR) spectroscopy of graphene oxide-5,10,15,20-mesotetra (4-aminophenyl) porphyrin hybrid (GO-TAP), with chemometrics, for the variety identification and age prediction of twelve Pu-erh teas. Partial least squares discriminant analysis (PLSDA) and partial least squares regression (PLSR) models were respectively employed to classify the variety of and predict the age of Pu-erh teas based on the collected MIR spectra. Compared with traditional MIR spectroscopy, MIR spectroscopy based on GO-TAP gave better accuracy and specificity in variety classification and age prediction. The GO-TAP complex-based MIR spectroscopy sensor coupled with chemometrics could achieve 100% accuracy for variety classification and predicts storage time of Pu-erh tea. This method can be applied for the accurate identification and prediction of Pu-erh tea storage time, and it might have enormous potential for the application in storage time identification of other food stuff.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2020
·
IF 4.972
Chao Wang,Zhongrong He,Chenxia Zhang,Liping Du,Dongguang Xiao,Yongquan Xu
The objective of this study was to identify the released behavior of odor-active compounds of Pu-erh tea during the water-boiling extraction, as well as to explore the feasibility of aroma recovery using absorption oils. The behavior of odor-active compounds was identified by using piecewise recovered condensed water combined with sensory, GC-O, and GC–MS analysis. The power-function type kinetic model was the model that best fitted odor intensities, alcohols, methoxy-phenolics, esters, aldehydes, ketones, and total compounds of condensed water. The sensory quality of the condensed water was the best when 16% of added water was evaporated. Six absorption oils were evaluated, and paraffin oil (35 cSt) performed the best in terms of both absorption efficiency and sensory quality of the essential oil. Under the optimized conditions, the absorption and recovery efficiency of odor compounds reached 54.49% and 39.52%, respectively. The alcohols, aldehydes, and methoxy-phenolics exhibited higher absorption and recovery efficiency.
研究领域:
食品科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Huihui Xie,Hui Zhang,Xinxin Liu,Shenglong Tian,Yunsi Liu,Shiyu Fu
A lignin-based PU coating was prepared for paper-based green packaging. Two representative diisocyanate were used to prepare the coatings. Due to the rigid aromatic, the physical properties of the TDI system reached the maximum below the lignin content of 40%. The HDI that contains flexible aliphatic chains alleviated the brittleness of coating, and it showed physical advantages when the lignin content was more than 50%. Owing to the high lignin content, the coating presented enhanced thermal stability . After coated with the lignin-based PU coatings, the dry tensile strength of coated paper was improved by 126%. Amazingly, the wet strength was increased from 0.31 to 12.6 MPa with an improvement nearly 40 times. Based on the coordination of lignin, Ag + was introduced into the PU matrix, which imparted the coating with excellent antibacterial ability. The colony forming units of E. coli and S. aureus were both less than 1. However, no inhibition halo was observed, which indicated that the Ag was firmly anchored on the coating and the antibacterial ability is only available when the bacterial contact the coating surface. The lignin-based PU coating with favorable sustainability and properties shows great potential in paper-based green packaging fields.
研究领域:
材料科学
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环境科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2023
·
IF 6.1
Yuting Rong,Jialing Xie,Haibo Yuan,Lilei Wang,Fuqiao Liu,Yuliang Deng,Yongwen Jiang,Yanqin Yang
Storage time is one of the important factors affecting the aroma quality of Pu-erh tea. In this study, the dynamic changes of volatile profiles of Pu-erh teas stored for different years were investigated by combining gas chromatography electronic nose (GC-E-Nose), gas chromatography-mass spectrometry (GC–MS), and gas chromatography-ion mobility spectrometry (GC-IMS). GC-E-Nose combined with partial least squares-discriminant analysis (PLS-DA) realized the rapid discrimination of Pu-erh tea with different storage time (R 2 Y = 0.992, Q 2 = 0.968). There were 43 and 91 volatile compounds identified by GC–MS and GC-IMS, respectively. A satisfactory discrimination (R 2 Y = 0.991, and Q 2 = 0.966) was achieved by using PLS-DA based on the volatile fingerprints of GC-IMS. Moreover, according to the multivariate analysis of VIP > 1.2 and univariate analysis of p < 0.05, 9 volatile components such as linalool and (E)-2-hexenal were selected as key variables to distinguish Pu-erh teas with different storage years. The results provide theoretical support for the quality control of Pu-erh tea.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Xin Futao,Luo Min,Li Chun,Ma Lingling,Xu Diandou,Xu Gang,Li Xi,Shao Yang
A rapid method has been developed for determining ultra-low level Pu isotopes in atmospheric particulate matter samples using SF-ICP-MS and TEVA resin. The Pu purification, ashing conditions and microwave digestion, were optimized to achieve high decontamination factor of U (4.1 × 10 4 ) and stably high Pu recovery (80–90%). The method detection limits were estimated to be 0.83 fg/g for 239 Pu and 0.70 fg/g for 240 Pu. Four IAEA certified reference materials were used for method evaluation. Finally, the method was successfully applied to determine the source of Pu in atmospheric particulate matter samples. The method can be performed within 16 h.
研究领域:
环境科学
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核化学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
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IF 6.2
Xuewu Li,Chenghu Ma,Tian Shi,Hejie Yang,Chuanwei Zhang,Wei Qi,Chen Li,Rongrong Liu,Weiping He,Yuanhai Liu
Aluminum-Lithium (Al-Li) alloys widely used in aerospace manufacture are highly susceptible to corrosion, which limits their industrial applications. Herein, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) is used as a modifier for low-surface-energy treatment of TiO 2 nanoparticles. The water-based polyurethane (PU) is made as a binder to achieve a tight bonding between modified ceramic particles and Al-Li alloy, thus resulting in the extremely-feasible air-spraying preparation of a superhydrophobic coating with strong abrasion resistance. The water contact angle (CA) of as-prepared coating achieves 160 ± 0.83°, and the rolling angle (SA) is as low as 5.95 ± 0.59°. The surface structure, organization and composition are further characterized using SEM, EDS, XPS and laser confocal microscopy. Meanwhile, the electrochemical impedance and potentiodynamic polarization tests are performed for corrosion characterization. The results show that the corrosion potential of such coating increases by 170 mV compared with substrate, the corrosion current density decreases by two orders of magnitude, and the impedance modulus increases by two orders. The corrosion inhibition rate of the as-prepared coating is 98.8%, indicating that the corrosion resistance has been significantly enhanced. In addition, the mechanical robustness and stability of the coating is evaluated and confirmed using a sandpaper rubbing test. It also possesses great self-cleaning, anti-pollution and thermostable behaviors, thereby allowing them to work in extreme manufactures. Moreover, the as-prepared coating exhibits excellent adaptability to various materials and anti-icing property. This work sheds positive insights in enlarging industrial applications of multifunctional ceramic coatings in aerospace fields.
研究领域:
材料科学
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航空航天工程
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 18
·3223
·
IF 5.1
Xianxiu Zhou,Jiajing Hu,Hongchun Cui,Jiahao Tang,Yongwen Jiang,Haibo Yuan,Jiahua Li,Yanqin Yang
Floral–fruity aroma Pu-erh tea (FFAPET) is highly valued by consumers for its distinctive and appealing fragrance. This study conducted a comprehensive investigation into the volatile components of FFAPET using advanced analytical techniques, including GC-O-MS, GC-MS/MS, aroma recombination, and omission tests. Compared with traditional stale aroma Pu-erh tea, FFAPET exhibited higher levels of alcohols and alkenes. Through GC-O-MS combined with OAV analysis, 10 key active-aroma compounds were identified in representative FFAPET samples. These compounds included (E, E)-2,4-heptadienal, phenylethyl alcohol, geraniol, (E,Z)-2,6-nonadienal, (Z)-4-heptenal, 2-phenethyl acetate, 2,2,6-trimethylcyclohexanone,D-limonene,β-ionone, and linalool, all of which made significant contributions to the development of the characteristic floral–fruity aroma profile. Tests involving aroma recombination and omission further confirmed that seven of these odorants played essential roles in defining the overall aroma of FFAPET. These findings offer valuable theoretical insights for the enhancement and regulation of Pu-erh tea flavor, particularly for the optimization of the floral–fruity aroma characteristics.
研究领域:
食品化学
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风味科学
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分析化学
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茶叶科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Xiao Zhang,Qi Yu,Jingmiao Zhou,Bin Luo,Jie Li,Rong Gao,Mengdan Li,Bo Cui,Jing Chen
Oil spills and oily wastewater pose severe threats to marine ecosystems and public health, necessitating the development of materials capable of high-performance and durable separation. Herein, a dopamine-based three-in-one strategy was employed to form a zeolitic imidazolate framework-8 (ZIF-8)/reduced graphene oxide (RGO) nanocoating in situ on the surface of polyurethane (ZRP) foam, thereby synthesizing a composite foam with a layered structure. The ZRP foam exhibits excellent hydrophobic/oleophilic properties, with an adsorption capacity for organic solvents as high as 98.76 g/g. Under gravity, the foam achieves an oil-water separation efficiency of 99.2% while effectively repelling water. For surfactant-stabilized water-in-oil emulsions, the compressed ZRP foam shows a separation efficiency of 99.8% and a flux of 664 L·m −2 ·h −1 . The material retains over 97% of its initial absorption capacity after 100 adsorption-desorption cycles and maintains structural and functional stability under harsh chemical (pH 5–14), thermal (−30 °C to 100 °C), and mechanical (compression, torsion, abrasion) conditions. Furthermore, the ZRP foam demonstrates remarkable photothermal conversion capability, which significantly reduces the viscosity of heavy oils under illumination and thereby enhances separation efficiency, including solar-assisted recovery of crude oil. This study offers a robust and sustainable strategy for oil-water separation and environmental remediation in oilfields.
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Guojun Deng,Mengnan Sun,Yongqian Shi,Yuezhan Feng,Yuancai Lv,Longcheng Tang,Jiefeng Gao,Pingan Song
The leaked hazardous chemicals pose significant risks due to their harmful and combustible nature. Removing them from the environment has become an arduous task for both the industrial sector and academic community. In this paper, Ti 3 C 2 T x (MXene) nanosheets and metal-organic framework (ZIF-8 MOFs) functionalized polyurethane (PU) sponges (PU-Ti 3 C 2 T x -MOF sponges) were prepared by immersion coating and in-situ growth techniques. The as-prepared PU-Ti 3 C 2 T x -MOF sponge exhibited superior hydrophobicity with a water contact angle of 135°. Additionally, it demonstrated a higher adsorption capacity and rapid adsorption ability for liquid hazardous chemicals within 1 min, while still maintaining good reusability for adsorption. The PU-Ti 3 C 2 T x -MOF 2 sponge had the highest adsorption capacity of 48–91 times of its own mass for liquid hazardous chemicals. Furthermore, it demonstrated excellent reusability, maintaining its high adsorption capacity for oils and organic solvents even after being used 5 times. These results surpass previously reported data and highlight the superior capabilities of the PU-Ti 3 C 2 T x -MOF 2 sponge. Meanwhile, the PU-Ti 3 C 2 T x -MOF sponge maintained the excellent flame retardancy and compressibility . This work provides a new pathway for the design of functional polymer sponges and their potential application in rapid elimination of the leaked hazardous chemicals.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Jirui Kun,Qing Meng,Chia-Cheng Wei,Guanhua Xie,Jingna Yan,Chi-Tang Ho,Huarong Tong
Cup aroma refers to the volatiles emitted from an empty cup after tea infusion. In this study, gas chromatography–olfactometry (GC–O) and the odor activity value (OAV) approach were employed to investigate the composition of fermented soybean-like cup aroma from raw Pu-erh tea. Further, the aroma recombination and omission tests were performed, and the results demonstrated that 2-methylbutyric acid, acetic acid, 4-methyl-3-penten-2-one, ethyl isobutyrate, nonanoic acid, and phenylacetic acid exhibited relatively high aroma intensities (AI) and OAVs among the 12 odor-active compounds that were detected in the fermented soybean-like cup aroma. The aroma recombination, which was performed employing the 12 odorants with AI ≥1 successfully mimicked the overall aroma profile of the fermented soybean-like cup aroma. The omission test revealed that 2-methylbutyric acid contributed significantly to the fermented soybean-like cup aroma. And the enantiomeric ratio (ER) of the ( S )- to ( R )-forms of 2-methylbutyric acid was 67:33.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Jiawei Liu,Qingyi Zeng,Huirui Lei,Kaiyuan Xin,Anming Xu,Ren Wei,Ding Li,Jie Zhou,Weiliang Dong,Min Jiang
Microorganisms capable of decomposing polyurethane (PU) and other plastics have the potential to be used in bio-recycling processes. In this study, 20 PU-degrading strains were isolated, including 11 bacteria and 9 fungi, using a synthesized poly(1,4-butylene adipate)-based PU (PBA-PU) as the screening substrate. Three PU substrates with increasing structure complexities were used for a thorough evaluation of microbial degradation capacity: Impranil® DLN-SD, PBA-PU film and PU foam waste. After 4 days, the best fungal PBA-PU degrader, Cladosporium sp. P7, could degrade 94.5% of Impranil® DLN-SD. After 28 days of cultivation, 32.42% and 43.91% of solid PBA-PU film was converted into soluble small molecules when used as the sole carbon source or in a medium with other co-carbon sources, respectively. Accordingly, the weight loss of PU foam waste after 15 days was 15.3% for the sole carbon condition and 83.83% for the co-carbon conditions. Furthermore, PBA-PU was used for metabolic pathway analysis because of its known composition and chemical structure. Six metabolites were identified during the degradation process of PBA-PU, including adipic acid (AA), 1,4-butanediol (BDO), and 4,4’-methylenedianiline (MDA), which can also be used as the sole carbon source to grow the fungal strain P7, resulting in the discovery of two MDA metabolites during the cultivation processes. Based on the presence of these eight metabolites, we hypothesized that PBA-PU is first depolymerized by the fungal strain P7 via ester and urethane bond hydrolysis , followed by intracellular metabolism and mineralization of the three monomers to CO 2 and H 2 O.
研究领域:
环境科学
·
微生物学
·
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）