Materials
·
2024
·Vol. 17
·期 7
·1575
·
IF 3.1
Liliang Chen,Weiguo Li,Xianbo Hou,Gang Feng
Flexible La-doped Sm2Zr2O7/polyurethane (PU) coated leather composites were synthesized using a one-step hydrothermal method, with highly efficient photocatalytic degradation properties by coating the La-doped Sm2Zr2O7/PU emulsion onto the leather and drying it. The phase composition and optical properties of the as-prepared photocatalytic material were systematically characterized. The result revealed that La was doped in Sm2Zr2O7successfully, and the prepared samples still possessed pyrochlore structure. The absorption edge of the prepared samples exhibited a red-shift with the increase in La doping, indicating that La doping could broaden the absorbance range of the La-doped Sm2Zr2O7materials. The catalytic performance of La-doped Sm2Zr2O7/PU composite emulsion coating on the photocatalytic performance of leather was studied with Congo red solution as the target pollutant. The results showed that the best photocatalytic property was found in the 5% La-doped Sm2Zr2O7nanomaterial at a concentration of 3 g/L. The resulting 5% La-doped Sm2Zr2O7nanomaterial exhibited a high specific surface area of 73.5 m2/g. After 40 min of irradiation by a 450 W xenon lamp, the degradation rate of Congo red reached 93%. Moreover, after surface coating, the La-doped Sm2Zr2O7/PU coated leather composites showed obviously improved mechanical properties, as the tensile strength of La-doped Sm2Zr2O7/PU coated leather composites increased from 6.3 to 8.4 MPa. The as-prepared La-doped Sm2Zr2O7/PU coated leather composites with enhanced mechanical properties and highly efficient photocatalytic performance hold promising applications in the treatment of indoor volatile organic compounds.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Food Frontiers
·
2025
·
IF 6.9
Sibo Zhao,Jielin Jiang,Yan Liu,Mianhong Xu,Rui Yang,Zhi Yang,Jilin Xie,Zhanggui Ding,Liyong Luo,Liang Zeng
Excessive alcohol consumption in contemporary society induces alcoholic liver disease (ALD). Previous laboratory studies demonstrated hepatoprotective and gut microbiota–modulating effects of ripe Pu-erh tea. To identify the key bioactive components responsible for these effects and to support the development of functional beverages, we investigated the preventive effects of various membrane-separated Pu-erh tea extracts on a chronic ALD mouse model. The extracts included an 800-Da nanofiltration fraction, a fraction isolated via a 50-nm ceramic membrane, the retentate from the 50-nm ceramic membrane filtration, and unfiltered Pu-erh tea. The results revealed that the fraction isolated via a 50-nm ceramic membrane (T4) significantly improved alcohol-induced intestinal barrier dysfunction, reduced lipopolysaccharide (LPS) release, and suppressed the release of proinflammatory cytokines, including tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-1β (IL-1β). Furthermore, T4 attenuated hepatic lipid accumulation, oxidative stress, and inflammatory responses by modulating the Nrf2/NQO1 antioxidant pathway and inhibiting toll-like receptor 4 (TLR4)/MyD88-mediated proinflammatory signaling. Notably, T4 restored microbial homeostasis by increasing the relative abundance of beneficial bacteria, such as Dubosiella , Muribaculum , and Lactobacillus , and significantly regulated tryptophan metabolism and its related metabolite, indole-3-acetic acid (IAA). Overall, the membrane separation technology enriched T4 with polyphenols and flavonoids, which further regulated tryptophan metabolism by regulating liver oxidative stress and promoting probiotic colonization and ultimately alleviates ALD. The membrane-fractionated Pu-erh tea, particularly T4, represents a promising functional beverage to combat alcohol-induced metabolic disorders.
研究领域:
食品科学与技术
·
营养生物化学
·
肝脏病学
·
微生物组研究
·
植物化学
·
功能食品
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 11
·1894
·
IF 5.1
Xiaomin Chen,Yao Hu,Zhen Zeng,Xu Zhang,Yahui Huang
As a potential raw material with a variety of bioactive compounds, Pu-erh raw tea can produce rich flavor and health benefits through natural fermentation or microbial fermentation in traditional processing. However, the traditional fermentation process has some problems such as a long fermentation period and unstable quality. Monascus, a kind of fungus used in both medicine and food, has been proved to have many beneficial effects such as lowering cholesterol and regulating blood lipids. Therefore, in this study we investigated whether the fermentation of mixed monascus could significantly improve the flavor quality and lipid-lowering activity of Pu-erh raw tea. We added four kinds of monascus to unfermented Pu-erh raw tea (UT) to obtain a fermented Pu-erh raw tea (FT). The quality of the two tea samples was determined and an in vitro lipid-lowering experiment was conducted. The results show that the contents of water extractives, flavone, trans-catechins (GCG and CG), theabrownins, and caffeine in FT are significantly higher than those in UT, increasing by 19.41%, 14.47%, 18.76%, 29.82%, and 10.67%, respectively. In terms of aroma, linalool was the characteristic compound of UT, presenting a floral note. D-Limonene was the key characteristic substance of FT, manifested as lemon, toast, and wood. In terms of taste, FT has a high content of bitter amino acids and caffeine, a low content of catechins, and is rich in carbohydrate substances, forming a characteristic mild and mellow slightly bitter taste with reduced astringency. In addition, the relative contents of active substances with lipid-lowering effects such as quercetin, quercitrin, ascorbic acid, and sorbitol in FT were higher than those in UT, increasing by 83.09%, 81.73%, 89.86%, and 92.76%, respectively. The effect of FT on regulating cellular lipid metabolism was superior to UT based on cell experiments. The research results provide a scientific basis for the deep processing and functional development of Pu-erh raw tea.
研究领域:
食品科学
·
微生物学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Hao Jiang,Wuting Pang,Meng Cheng,Tong Yan,Zhikun Wang,Zhihao Zhao,Chunling Li,Shuangqing Sun,Songqing Hu
Self-healing elastomers with great mechanical properties have attracted much attention, however how to balance the mechanical property and self-healing performance is still challenging. In this work, we prepared polyurethane elastomers (PU-n) with different phase-locked structures in which dynamic disulfide bonds and hydrogen bonds are locked at low temperature to provide great mechanical strength and activated by heating to promote self-healing. PU-n exhibit tensile strength from 0.83 MPa to 11.98 MPa because of different microphase separation structures, which is attributed to different thermodynamic compatibility and hydrogen bonds between hard segment with different lengths and soft segment. PU-n can repair surface scratches within 10 min and the well-designed elastomer (PU-50) can achieve a full-cut self-healing efficiency above 90 % at 60 ℃ for 2 h. The self-healing process is dependent on the dynamic recombination of hydrogen bonds and disulfide bonds, which can be accelerated by heating because of the faster molecular motion. The dynamics characteristics of hydrogen bonds and disulfide bonds also endows PU-n with the recyclability, the recycled elastomer exhibits similar mechanical and self-healing properties with original elastomer. This work provides an effective strategy to achieve self-healing polyurethanes with the high mechanical strength.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yanyan Yu,Guopeng Xu,Peijian Zhao,Jie Zhang
Wound dressings, an effective tool for repairing injured skin and protecting it from secondary damage, have been widely manufactured. However, the design of wound dressings with waterproofness, breathability, mechanical robustness, and excellent biocompatibility remains a challenge due to the imbalance between the multiple desirable properties. Herein, a strategy is proposed to fabricate biocompatible membranes via a facile one-step electrospinning method. Polydimethylsiloxane-based polyurethane is effectively prepared to form durable hydrophobic surfaces , resulting in a high degree of hydrophobicity (141.0° water contact angle). The porous structure is enhanced by adjusting the solution concentration and heat treatment temperature, resulting in an optimal water vapor transmission rate of 8.2 kg·m −2 ·h −1 . Additionally, the membrane exhibits a hydrostatic pressure of 52.3 kPa, which is approximately 14.1 times greater than that of PU fibrous membrane , and an enhanced tensile strength of 6.60 MPa. Moreover, the membrane can be utilized in a wide temperature range from − 123 °C to 160 °C due to its low glass transition temperature and exceptional thermal stability. Significantly, both in vitro and in vivo studies confirmed the remarkable biocompatibility and minimal toxicity to normal cells and mice skin. Our work presents a new approach to designing waterproof and breathable biomaterials with high mechanical strength , thereby enhancing their performance and functionality in the biomedical field, particularly in wound dressing applications.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jie Zhang,Xu Liu,Yu Sun,Zhaoyan Ge,Xinlu Tian,Jian Shen,Jiang Yuan
Diabetic wound healing is often hampered by persistent oxidative stress, poor angiogenesis, and bacterial infections. Herein, ZnS/keratin nanoclusters(ZnS@Ker) were first synthesized using the ion diffusion method based on chelation between keratin and metal ions, achieving the controlled release of hydrogen sulfide (H 2 S) and Zn 2+ ions. These nanoclusters were then co -electrospun with polyurethane (PU) to afford PU/ZnS@Ker mats. These mats demonstrated acidic responsive release of Zn 2+ and H 2 S under an infected wound microenvironment, fostering cell adhesion, migration, and angiogenesis while effectively combating bacterial infection and scavenging reactive oxygen species. Notably, in vivo wound healing studies in diabetic rats revealed that PU/ZnS@Ker mats promoted collagen deposition and tissue regeneration, thereby accelerating wound healing. Taken together, PU/ZnS@Ker biocomposite mats emerge as an up-and-coming solution for managing diabetic wound healing.
研究领域:
生物医学工程
·
材料科学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 16
·7321-7331
·
IF 3.591
Zhanyu Jia,Guangyao Li,Juan Wang,Shouhua Su,Jie Wen,Jinfeng Yuan,Mingwang Pan,Zhicheng Pan
Conductivity, self-healing and moderate mechanical properties are necessary for multifunctional hydrogels, which have great potential in health-monitor sensor applications. However, the combination of electrical conductivity, self-healing and good mechanical properties to hydrogels is still a huge challenge. To solve this issue, we prepared a new kind of polyurethane (PU) hydrogel using 4-aminophenyl disulfide (APDS) as the chain extender, which endowed PU hydrogels with fast self-healing property, owing to dynamic disulfide bonds embedded in hard segments. In addition, the rigid benzene ring contained in the chain extender provided PU hydrogels with good mechanical properties. Moreover, the conductive component polypyrrole (PPy) was incorporated by in situ polymerization to impart the conductivity performance. A nonporous surface of PU hydrogels processed was found by freeze-drying. This was due to the short-chain PEG soft segment and the unique microphase separation structure of polyurethane. The obtained optimal PU/APDS/PPy (PUASPy) hybrid hydrogels combined multifunctionality with certain conductivity (0.055 S m−1), rapid self-healing property, moderate mechanical strength (tensile stress of 1.1 MPa), flexible stretchability (sensing range >500%), and rapid mechanical recovery (10 min). The excellent characteristics of hydrogels are further illustrated by being used as a large-scale human motion monitoring sensor. This work provides an effective approach to prepare a multifunctional PU hydrogel for broadening their application including wearable devices and responsive electrical devices.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
传感器
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xuewu Li,Chenghu Ma,Tian Shi,Hejie Yang
The corrosion failure of aluminum‑lithium (Al Li) alloy, extensively used in aerospace and industry area, inevitably brings about considerable economic loss. In this work, stearic acid (STA) is utilized as a modulator for the low surface energy modification of TiO 2 particle. Polyurethane (PU) is employed as a binder to ensure the firm adhesion of modified STA@TiO 2 to Al Li alloy through a controllable and low-cost spraying process. Such structure design brings about a robust preparation of STA@TiO 2 /PU superhydrophobic coating for large-scale engineering application. The resultant coating exhibits a static water contact angle (CA) of 161.3 ± 0.8°, and a sliding angle (SA) of 3.1 ± 0.7°. The subsequent characterizations of surface morphology and chemical structure are performed using SEM, EDS, XPS, and laser confocal microscopy. Furthermore, the contrastive electrochemical impedances and kinetic potential polarizations are investigated on as-prepared coating and Al Li alloy substrate. The results indicate that the impedance modulus of STA@ TiO 2 /PU coating is enhanced by two orders of magnitude, while the corrosion potential demonstrates an increasement of 180 mV. The experimental tests confirm a significant improved corrosion resistance for STA@ TiO 2 /PU coating. Moreover, the effective self-cleaning, anti-pollution, buoyancy enhancement and anti-icing properties are discussed, and the corresponding interface behaviors and function implementation mechanisms are also systematically investigated. The findings have positive implications for expanding industrial applications of such multi-functional ceramic coatings in engineering construction, environmental protection, and harsh working conditions.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Shiqiao Liu,Debao Fang,Junlin Yang,Yongliang Shen,Yuefeng Su,Caihong Feng,Ning Li,Chengzhi Wang,Zhiyong Xiong,Haibo Jin,Jingbo Li
Carbon aerogels are highly promising lightweight microwave absorbers, yet their intrinsic brittleness and disordered pore structures significantly limit both mechanical reliability and electromagnetic (EM) performance. Here, a flexible honeycomb-like anisotropic hybrid carbon aerogel (CFMT), modified with MoS 2 /FeS 2 nanoparticles and toughened by a polyurethane network, is developed to overcome these limitations. Benefiting from the aligned quasi-periodic pore architecture, CFMT exhibits a distinct anisotropic electromagnetic response. When incident waves propagate parallel to the honeycomb channels, strong dielectric relaxation is induced, and localized electromagnetic resonance (LEMR) is generated within the pore structure, enabling efficient capture and dissipation of centimeter-wavelength electromagnetic energy. Consequently, the CFMT aerogel delivers an ultrawide effective absorption bandwidth of 11.84 GHz, accompanied by a minimum reflection loss of −50 dB. In addition to excellent microwave absorption, the aerogel also demonstrates robust mechanical flexibility and superior infrared stealth capability. This work explicitly elucidates the mechanism by which quasi-periodic porous structures enhance microwave absorption performance, providing a highly effective design paradigm for next-generation, multifunctional, and flexible electromagnetic wave absorbers.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yumei Xing,Yawei Shi,Keyan Liu,Yan Wang,Ya Sun,Zonglin Pan,Mengqi Li,Mingxing Guo,Guanghui Ding
Composite sponges with opposite wettability were successfully prepared. • ODA-MgFe 2 O 4 -PU can effectively absorb oil. • TA-MgFe 2 O 4 -PU can effectively activate PMS to degrade organic pollutants. • The degradation pathway was proposed by DFT calculation and LC-MS analysis. Dissolved organic pollutants and oils are prevalent wastewater contaminants, and developing efficient remediation technologies remains a research hotspot. Herein, magnesium ferrite (MgFe 2 O 4 ) was synthesized via coprecipitation and immobilized on polyurethane (PU) sponges, followed by hydrophobic octadecylamine (ODA) and hydrophilic tannic acid (TA) modification to fabricate ODA-MgFe 2 O 4 -PU and TA-MgFe 2 O 4 -PU composite sponges. Hydrophobic ODA-MgFe 2 O 4 -PU showed excellent oil absorption capacity of 26.8–50.3 g/g for various oils and stable hydrophobicity under complex water conditions. By contrast, hydrophilic TA-MgFe 2 O 4 -PU activated peroxymonosulfate (PMS) to efficiently degrade Rhodamine B and other pollutants with removal efficiencies of 64.5%–95%, displaying good environmental adaptability and reusability. The RhB degradation mechanism and pathway were clarified via quenching experiments, electrochemical tests, spectral characterization, functional theory calculations and mass spectrometry analysis. Moreover, ECOSAR prediction and Vigna radiata germination tests verified the effective detoxification of degraded RhB. Download: Download high-res image (151KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Pan Luo,Shuyuan Dong,Lirong Liang,Fengxia Kuang,Chunyu Du,Zhenqiang Ye,Guangming Chen
Integrated flexible thermoelectric (TE) fabric demonstrates great potential for wearable energy harvesting and intelligent temperature sensing. However, existing TE fibers often struggle to simultaneously satisfy requirements for high and stable TE performance, favorable weavability, sweat resistance, and good biocompatibility. Herein, continuous PEDOT:PSS/SWCNT composite fibers with these desirable features are obtained via a convenient freeze-thaw-induced gelation process assisted wet-spinning process, exhibiting a high electrical conductivity of 1960 S cm −1 , a large power factor of 59.6 µW m −1 K −2 , and a high tensile strength of 103 MPa. Polyurethane-encapsulated composite fibers further provide superior mechanical flexibility, desirable weavability, remarkable washability, low-temperature tolerance, and stable TE performance over 1000 bending/twisting cycles. A resulting TE fabric comprising 32 p-type legs achieves a power density of 60.1 µW cm −2 at temperature difference of 50 K, surpassing most reported PEDOT:PSS-based fiber devices, and retains over 95% performance after various mechanical deformations. The developed fabric-integrated intelligent fever monitoring system (forehead/wrist/armpit) exhibits high sensitivity (alarm response < 5 s) and good repeatability (3–4.3 s response over 50 cycles) for low/high fever monitoring. Such composite TE fibers are anticipated to advance practical applications of wearable TE fabrics in body energy harvesting, personalized healthcare, and intelligent fitness monitoring.
研究领域:
材料科学
·
可穿戴电子学
·
热电学
·
生物医学传感
·
柔性器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2018
·Vol. 13
·期 2
·261-266
·
IF 0.841
Bin Zhang,Yujie Jiang,Jian Han
A synthetic approach for the preparation and conductive polyurethane (PU)/activated carbon (AC) microcapsule to poly(vinyl chloride) (PVC) is described. The developed flexible PVC/PU/AC microcapsule composites are economically and ecologically viable, because it is based on AC as inexpensive starting material; the reactions can be carried out one-pot with quantitative yields of the PU/AC microcapsule. The approach is furthermore highly versatile and allows for the preparation of excellent plasticiser migration stability, electrical property and mechanical properties that may be adjusted to a broad range of applications from highly flexible to semi-rigid PVC.
研究领域:
材料科学
·
高分子化学
·
电气工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）