FIBERS AND POLYMERS
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2019
·Vol. 20
·期 5
·961-965
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IF 1.439
Song Kedong,Zhang Ping,Huang Yuting,Xu Fu,Ding Yanhuai
Polyurethane (PU) has been intensively studied as a promising separator material for Li-ion batteries (LIBs). However, poor dimensional stability and low liquid-electrolyte wettability of pure PU separator restrict its application in LIBs. Here polyvinyl pyrrolidone (PVP) and graphene oxide were employed to enhance the thermal stability, mechanical performance and liquid-electrolyte compatibility of PU separator. High anodic stability above 5.25 V was reached in PU/PVP/GO separator, fully compatible with the high-voltage cathode materials. The electrochemical characterization indicates PU/PVP/GO membrane is a promising separator for advanced LIBs.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-15
·
IF 12.019
Wang Xinyi,Tao Yan,Pan Shaoshan,Fang Xue,Lou Congcong,Xu Yunqi,Wu Jianpeng,Sang Min,Lu Liang,Gong Xinglong,Luo Tianzhi,Xuan Shouhu
With the booming development of smart wearable devices, flexible multifunctional composites with high sensitivity and well health therapy have evoked great interest for next-generation healthcare electronics. However, the weak biocompatibility, low breathability, and narrow sensing range greatly hinder the development of healthcare sensors. Herein, a porous, flexible and conductive MXene/Polydimethylsiloxane/Polydopamine/Polyurethane Sponge (MXene/PDMS/PDA/PU) nanocomposite is developed as a promising motion-detecting device with good flexibility, breathability, sensing performance, photothermal therapy and antibacterial activity. Benefiting from the porous structure and biocompatible surface, this multifunctional sensor is further fabricated into a diagnostic and therapeutic system for monitoring human body motion and performing hot therapy/antibacterial treatment in the application of sports injury site. Moreover, both the wireless smart insole and cushion are constructed to gait monitoring and sit position detecting. This multifunctional hybrid sponge not only demonstrates great potential for motion monitoring sensors but also exhibits wide potential in wearable medical assistive and therapeutic systems.
研究领域:
生物医学工程
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材料科学
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健康监测
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2012
·
IF 3.456
Qin Zhang,Yunhui Liu,Kevin C. Chen,Gonggen Zhang,Xuhua Shi,Hanjia Chen
A macromolecular biocompatible surface modifier for polyurethane (PU), namely, polyurethane-block-poly(vinylpyrrolidone) (PU- b -PVP) copolymer, was synthesized by coupling hydroxyl-terminated PVP with diisocyanate-terminated poly(ethylene glycol) using 1,6-hexamethylene diisocyanate (HDI) as coupling agent. The chemical structure and molecular weight of the synthesized copolymer were systematically characterized by nuclear magnetic resonance spectrum ( 1 H NMR), Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The synthesized surface modifier was blended with PU and effectively increased the hydrophilicity of PU. To evaluate the hemocompatibility of the PU/PU- b -PVP blend films, the extent of platelet adsorption, plasma recalcification time and hemolysis were measured. To determine if the blend films were toxic to mammalian cells, viability of the cells cultured on the blend films was assayed. All results indicated that the blood and cell compatibilities of the PU films were improved significantly after entrapment of a few PU- b -PVP copolymers into PU.
研究领域:
材料科学
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生物材料
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Evidence-based Complementary and Alternative Medicine
·
2019
·
IF 1.984
Liwen Han,Haotian Kong,Fasheng Liu,Xiaobin Li,Shanshan Zhang,Xuanming Zhang,Yong Wu,Hua Yang,Aiping Zhang,Kechun Liu
The aim of the study is to explore the protective effect of new gelatin (NG, Xin’ejiao in China) on hematopoietic injury caused by chemotherapy. Zebrafish, at 48 hours post fertilization (hpf), was treated with different chemotherapeutic drugs to establish the zebrafish hematopoietic damage model with reduced thrombocytes and erythrocytes. The protecting effects of NG on the thrombocytes and erythrocytes were observed, respectively, on zebrafish models. Then, the RT-PCR method was used to detect the change of mRNA level of the hematopoiesis-related cytokines scl1, c-myb, pu.1, GATA1, and runx1 genes. The results showed that 50 μg·mL−1 and 100 μg·mL−1 NG rescued and increased the thrombocytes numbers induced by vinorelbine (NVB) and chloramphenicol (CHL) and the erythrocytes numbers induced by methotrexate (MTX), doxorubicin (ADM), and mechlorethamine hydrochloride (MH) in zebrafish models. Meanwhile, the mRNA expression of scl1, c-myb, and GATA1 genes in the NG treatment group was raised compared with the MTX treatment group. Also, the mRNA expression of pu.1 and Runx1 in the NG treatment group was reduced compared with the MTX treatment group. In consequence, traditional Chinese medicine NG showed a certain degree protective effect on hematopoiesis injury induced by chemotherapy in this study, which may depend on the promotion of erythrocytes proliferation and the regulation of the hematopoietic genes level.
研究领域:
药理学
·
血液学
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分子生物学
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斑马鱼研究
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Xianghong Lü,Xiankun Wang,Li Guo,Qiuyun Zhang,Xingmei Guo,Laisheng Li
A simple and convenient method for the preparation of hydrophilic polyurethane (PU) modified poly(vinylidene fluoride) (PVDF) membranes was developed. First, PU with hydroxyl functional end-groups was synthesized in one-step from polyethylene glycol 400(PEG 400) and isophorone diisocyanate (IPDI), and the raw product was directly added into casting solution without further purification to modify the PVDF membrane. The properties and performance of the prepared PU/PVDF membranes were characterized with Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), contact angle measurement, protein adsorption and filtration test. FTIR and XPS analyses indicate that PU with hydroxyl functional end-groups was successfully incorporated and enriched onto the membrane surface, while filtration test and SEM analysis show that more and larger pores were formed on the blended membranes, which significantly improves the permeation performance of the modified membranes, compared with the unmodified PVDF membrane. Results from protein adsorption and flux recovery experiment reveal that hydrophilic PU modification substantially improves the fouling resistant ability of the modified membranes. In addition, the effects of the molar ratio of PEG 400 to IPDI and the content of the PU additive on the properties and performance of the PU/PVDF membranes were also investigated.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 12
·33160-33169
·
IF 5.19
Tao Ruidong,Li Hao,Liu Zihan,Zhang Xiaoying,Wang Mengyao,Shen Wenjuan,Qu Mengjie,Mei Yunjun
A novel adsorbent (FeOOH@PU) for hexavalent chromium [Cr(VI)] removal was synthesized using a polyurethane foam (PU) and FeOOH via a facile one-step method. Scanning electron microscopy (SEM), FTIR, X-ray photoelectron spectroscopy (XPS), and energy dispersive spectroscopy (EDS) characterized the adsorbent. The influence of environmental factors was investigated to evaluate the adsorption behavior for Cr(VI). Furthermore, adsorption dynamic and adsorption isotherm models described the adsorption performance. This adsorbent also treated electroplating wastewater and remediated simulated Cr(VI) contaminated soil. The adsorbent effectively removed Cr(VI) with a high adsorption rate; its equilibrium rate constant was 13 times that of FeOOH. Cr(VI) removal was a monolayer adsorption process and the maximum adsorption capacity of FeOOH@PU reached 34.9 mg Cr/g. Electrostatic attraction was the mechanism of Cr(VI) removal. Electroplating wastewater became clear and the Cr(VI) concentration decreased from 9.76 to 0.042 mg/L after treatment with FeOOH@PU. Cr enrichment in rice seedlings grown in remediated soil decreased from 7.687 to 6.295 mg Cr/kg. These results suggested that FeOOH@PU was a promising adsorbent for Cr(VI) removal and Cr(VI) stabilization.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Shanshan Hu,Liyong Luo,Xintong Bian,Rui Hai Liu,Sibo Zhao,Yu Chen,Kang Sun,Jielin Jiang,Zhonghua Liu,Liang Zeng
Pu-erh tea is a healthy beverage rich in phytochemicals, and its effect on the risk of inducing circadian rhythm disorders (CRD) is unclear. In this study, healthy mice were given water or 0.25% (w/v) Pu-erh tea for 7 weeks, followed by a 40 day disruption of the light/dark cycle. CRD caused dysregulation of neurotransmitter secretion and clock gene oscillations, intestinal inflammation, and disruption of intestinal microbes and metabolites. Pu-erh tea boosted the indole and 5-hydroxytryptamine pathways of tryptophan metabolism via the gut–liver–brain axis. Furthermore, its metabolites (e.g., IAA, Indole, 5-HT) enhanced hepatic glycolipid metabolism and down-regulated intestinal oxidative stress by improving the brain hormone release. Tryptophan metabolites and bile acids also promoted liver lipid metabolism and inhibited intestinal inflammation (MyD88/NF-κB) via the enterohepatic circulation. Collectively, 0.25% (w/v) Pu-erh tea has the potential to prevent CRD by promoting indole and 5-HT pathways of tryptophan metabolism and signaling interactions in the gut–liver–brain axis.
研究领域:
营养学
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药理学
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分子生物学
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胃肠病学
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神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Zhou Xiao-Xia,Yin Yi-Ting,Zhang Xiao-Yi,Li Shu-Sheng,Jiang Xu-Bao,Zhu Xiao-Li,Kong Xiang-Zheng
Fluorescent polyurea-carbon dots (PU-CD) were successfully achieved through a co-pyrolysis technique, combining polyurea (PU) with carboxyl-containing carbon dots (PCD) at a temperature of 220 °C. The PU was fabricated via a simple precipitation polymerization process using toluene diisocyanate in a water/acetone binary solvent system. PCD was generated by thermal treatment of poly(ethylene glycol) (PEG) at the same elevated temperature. To elucidate the structural characteristics of PU-CD, as well as its precursor components PU and PCD, a comprehensive suite of analytical techniques was employed, including transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), dynamic light scattering (DLS) and X-ray photoelectron spectroscopy (XPS). These analyses confirmed the formation of amide bonds resulting from the reaction between the terminal amines of PU and the carboxyl groups of PCD. An in-depth comparison of the fluorescence properties of PU-CD revealed marked enhancements in fluorescence intensity when contrasted with PU, PEG, and the individual PCD. The research explored the impact of various factors such as concentration, pH in aqueous solutions, and solvent type on the fluorescence emission of these materials, providing valuable insights into their emission mechanisms. It was particularly noteworthy that both PCD and PU-CD exhibited a confined-domain crosslink-enhanced emission effect. Utilizing the aqueous dispersion of PU-CD as a fluorescent probe, the detection of doxycycline (DOX), a long-acting, broad-spectrum, semi-synthetic tetracycline antibiotic, was achieved with a detection limit of 2.9×10 −7 mol/L. This study introduces a simple, green, and cost-effective fluorescent probe for the detection of DOX, which has significant potential for application in the realms of analytical chemistry and food safety monitoring in the future.
研究领域:
分析化学
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材料科学
·
纳米技术
·
传感器
·
环境监测
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产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2017
·
IF 2.572
Wenhui Xu,Yichun Ding,Ying Yu,Shaohua Jiang,Linlin Chen,Haoqing Hou
In this work, we synthesized a core-shell conductive filler of carbon nanotubes covered with polyaniline (PANi@CNTs), which showed good dispersibility to prepare highly flexible and foldable dielectric PMCs (PANi@CNTs/PU). The dielectric, mechanical, and thermal properties of the PANi@CNTs/PU composites were investigated. The mechanical flexible and foldable PANi@CNTs/PU composites could be promising dielectric material for preparing thin film capacitors.
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Muneerah Alomar,Lamia Abu El Maati,Muhammad Sultan Irshad,Naila Arshad,Afraa Alotaibi,Van-Duong Dao
The fabrication of sustainable solar-powered interfacial evaporators is essential for addressing global water scarcity challenges. Herein, we propose a new photothermal evaporator by applying a zirconium carbide-polypyrrole (ZrC-PPy) composite coating to a cellulose filter (CF) possessing enhanced photothermal conversion. The 3D photothermal evaporator is constructed by integrating a ZrC-PPy@CF evaporator onto triangular polyurethane (PU) foam. With a poor thermal conductivity of 0.078 W m −2 K −1 , the synthesized evaporator allowed effective heat localization under light. The evaporator produced an evaporation rate of 1.92 kg m −2 h −1 with a corresponding photothermal conversion efficiency of 89%. Additionally, the evaporator achieved over 99.9% rejection of common metal ions (Na + , K + , Ca 2+ , Mg 2+ ) from saline water, yielding high-quality freshwater. These findings highlight the ZrC-PPy@CF evaporator as a scalable and versatile platform for efficient wastewater treatment and desalination.
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Tuodong Xiong,Wanxiong Yong,Na Chen,Guodong Fu
Photochromic materials have recently attracted widespread attention in the research of smart windows because they can function without additional devices. In this study, an innovative photochromic thermal insulating hybrid film based on a polyurethane matrix was prepared via a one-pot method, incorporating phosphotungstic acid. The film demonstrates excellent transparency, good mechanical strength, and a significant modulation of the solar spectrum, transitioning from colorless to dark blue under sunlight without the need for additional electron donors. This photochromic behavior is reversible and reproducible without degradation, resulting in a transmittance variation of up to 71 % at 550 nm, which is the most sensitive to the human eye, and more than 50 % modulating performance in 1800 ∼ 2500 nm. In addition, thermal insulation experiments proved that the smart window device prepared by the film could achieve a reduction of 9.3 °C under daylight. Overall, the photochromic films prepared using the one-pot method show good performance involving mechanical strength, efficient photochromic response, broad spectral range modulation, high coloring efficiency and cycling stability, and have promising applications in energy-saving buildings, anti-counterfeiting and smart displays.
研究领域:
材料科学
·
能源工程
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yanxuan Ma,Yuhua Gao,Hao Huang,Yao Xu,Gongbin Wang,Rui Wu,Shuaifei Wang,Meiyu Li
Epoxy resin (EP), widely used in composites, exhibits brittleness and high internal stress due to its high cross-linking density after curing, driving extensive modification studies. This work integrates polyurethane (PU) via interpenetrating networks and polydopamine (PDA) nanoparticles to fabricate PU-PDA/EP composites, investigating their mechanical and self-healing properties. Tensile/hardness tests reveal improved mechanical strength, while infrared spectroscopy and scanning electron microscopy clarify the self-healing mechanism: PDA forms hydrogen bonds with epoxy groups, enabling autonomous repair within the matrix. Digital scattering correlation method analysis tracks deformation behavior, showing stress–strain, gray coefficient (Stc), and X-direction strain (Sts) evolution under load before/after repair in diverse environments. Optimal self-healing occurs at 0.6% PDA: specimens regain 104.45% of initial strength (28.57 MPa postrepair vs. 28.16 MPa initial) after 3-day ambient healing, surpassing original performance. The study confirms PDA's dual role in enhancing toughness and triggering reversible hydrogen-bond-driven repair, offering a facile strategy to overcome EP's brittleness.
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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）