SCIENCE
·
2024
·
IF 44.7
Yi Lu,Chen-Xi Yue,Li Zhang,Deqiang Yao,Ying Xia,Qing Zhang,Xinchen Zhang,Shaobai Li,Yafeng Shen,Mi Cao,Chang-Run Guo,An Qin,Jie Zhao,Lu Zhou,Ye Yu,Yu Cao
Precise regulation of intracellular phosphate (Pi) is critical for cellular function, with XPR1 serving as the sole Pi exporter in humans. The mechanism of Pi efflux, activated by inositol pyrophosphates (PP-IPs), has remained unclear. This study presents cryo-electron microscopy structures of XPR1 in multiple conformations, revealing a transmembrane pathway for Pi export and a dual-binding activation pattern by PP-IPs. A canonical binding site is located at the dimeric interface of SPX domains, and a second site, biased toward PP-IPs, is found between the transmembrane and SPX domains. By integrating structural studies with electrophysiological analyses, we characterize XPR1 as an IPs/PP-IPs-activated phosphate channel. The interplay among its TMDs, SPX domains, and IPs/PP-IPs orchestrates the conformational transition between its closed and open states.
研究领域:
细胞生物学
·
结构生物学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2020
·Vol. 12
·期 10
·2192
·
IF 3.426
Qiu-Shi Rao,Song-Yi Liao,Xing-Wen Huang,Yue-Zhu Li,Yi-Dong Liu,Yong-Gang Min
In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2(NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rctof MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.Keywords:polypropylene composite membrane;MXene;Ni-rich LiNi0.8Co0.1Mn0.1O2;electrochemical performance
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2025
·
IF 13.5
Yingtong Shi,Guotong Xu,Guizeng Liang,Di Lan,Siyuan Zhang,Yanru Wang,Daohao Li,Guanglei Wu
Lithium-sulfur (Li-S) batteries are regarded as one of the most promising candidates for next generation energy storage systems due to their high theoretical energy density. However, the practical application of Li-S batteries is limited by the low lithium ion (Li + ) transport efficiency and the rapid capacity decay caused by the shuttle effect. Herein, we report a composite comprising Polyethylene glycol (PEG) and vanadium nitride (VN) nanosheets coated onto a commercial polypropylene (PP) separator, called PEG-VN@PP separator. The supercatalytic effect and adsorption properties exhibited by the VN nanosheets significantly enhance the conversion of polysulfides, thereby improving both the capacity and stability of Li-S batteries. Due to the coating of PEG, Li + are attracted to the polar functional groups, enabling selective transport, which improves the transport efficiency of Li + and the rate capability of Li-S batteries. The Li-S battery assembled with PEG-VN@PP exhibits a high specific capacity of 782.0 mAh·g −1 and an average capacity decay of 0.048% per cycle at 1 C (1675 mA·g −1 ) for 700 cycles, using the carbon nanotubes/sulfur cathode with a sulfur mass loading of 1.2 mg·cm −2 .
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Guang-ze-guo Zhou,Jian-hua Zu,Li-bing Zhu,Xiao-jing Liu,Yu Wang,De-rui Zheng,Xiao-han Pan,Yi Xue
Based on previous operational experience, activated corrosion products account for approximately 80% of the radioactive nuclides during refueling outages. After taking measures to control 58 Co and 60 Co, 110m Ag has emerged as the main contributor to the radiation field in the primary loop. Traditionally, ion exchangers in Chemical and Volume Control Systems (CVCS) are responsible for removing 110m Ag. However, their limited adsorption capacity and poor selectivity result in the generation of substantial solid radioactive waste, which directly increases the treatment cost. To address this challenge, we developed PP-g-GMA@MoS 4 , a MoS 4 2− -functionalized PP nonwoven fabric synthesized via irradiation copolymerization and ion exchange. This adsorbent can stably removes >95% of Ag + across pH 1–5.9. Under simulated conditions (pH = 3), its adsorption capacity reached 623.05 mg/g, outperforming previously documented adsorbents. The adsorption process was better described by the Freundlich isotherm and the pseudo-first-order kinetic model. In the presence of an 80-fold excess of competitive ions, the distribution coefficient of Ag + still reached 10 5 mL/g and the separation factors of Ag + relative to each coexisting metal ion (SF Ag,m ) were 10 4 times higher than those of commercial resins. Exposure to 150 kGy of γ-ray irradiation did not significantly affect the adsorption performance of PP-g-GMA@MoS 4 . XPS, TEM, XRD and Raman spectra were conducted to explain the adsorption mechanism. These features—high capacity, outstanding selectivity, excellent irradiation resistance, and low material cost—make PP-g-GMA@MoS 4 a promising candidate for minimizing radioactive waste generation during 110m Ag removal in nuclear power plants.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 40
·49206
·
IF 2.52
Guodian Zhu,Di Xiong,Jiao Ding,Tao Ruan,Guoqiang Yin
Flow mark phenomenon is one of the typical and common surface defects that affect industrial desired surface and long-life mechanical properties of the injection molding of polypropylene (PP). The effect of in-situ grafted polyolefin elastomer (POE) on the flow marks on injection molding of PP was investigated by combining experimental methods with dissipative particle dynamics (DPD) simulations. It was found that 1,6-hexanediol diacrylate-grafted POE (POE- g -HD) facilitated the reduction of the flow marks under an optimized grafting condition, a screw speed of 250 rpm at 185°C. The DPD simulations indicated that the reduction of the flow marks via POE- g -HD was related to the emergence of POE- g -HD quasi-clusters. In addition, increasing melt strength of PP resulted in a melt fracture phenomenon and an increase of the flow marks. The limiting grafting degree of POE led to a finite reduction of the flow marks.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2019
·Vol. 76
·期 12
·6413-6428
·
IF 1.858
Peng Hui,Lu Min,Lv Fucheng,Niu Mingjun,Wang Wanjie
The effect of silane crosslinking reaction on properties and structure of polypropylene (PP)/ethylene–octene elastomer (POE) blends had been carried out. FTIR and gel content tests confirmed the grafting and crosslinking reaction mechanism of PP/POE blends. The incorporation of POE phase enhanced the crosslinking degree and thermal stability of blends. Crystallinity of silane-crosslinked PP/POE blends decreased sharply, and the melting points change a little with the POE content increasing. The rheological curves of silane-crosslinked PP/POE blends showed an obvious “gel point”, corresponding to the dynamic crosslinking network. Solvent resistance tests suggested crosslinking had a great improvement of solvent resistance. The blends with 30% POE had good comprehensive mechanical properties. Scanning electron microscopy images exhibited that crosslinking had a great influence on the morphologies of silane-crosslinked PP/POE blends. Characterization results indicated the “gel point” acquired from rheology had some corresponding relationship with mechanical properties and solvent resistance.
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
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Juntong Meng,Yongshuo Zhang,Xiongfei Du,Wei Zhang,Tiantian Li,Xinya Wang,Mingxing Chen
Formaldehyde (HCHO), a hazardous volatile organic compound (VOC) in indoor environments, urgently requires efficient abatement strategies. MnO2 is renowned for its excellent catalytic activity and enables effective degradation of HCHO at low temperatures. In this study, MnO2 nanorods (NRs) were successfully grown on polypropylene (PP) nonwoven fabric via hydrothermal synthesis, yielding MnO2 NRs @ PP composite material with integrated HCHO removal, antibacterial, and photocatalytic functions. pH value and temperature critically regulated MnO2 morphology. Increasing pH raised the aspect ratio of MnO2 NRs, which transitioned to MnO2 nanoparticles (NPs) when the pH value was above pH 3.5. Higher temperatures promoted MnO2 NRs formation, yet beyond 150 °C, excessive refinement led to MnO2 NRs agglomeration and partial PP fiber melting. Optimal performance was achieved at pH 3.5 and 150 °C, where the composite exhibited a high HCHO removal efficiency of 55.1% along with notable antibacterial and photocatalytic properties. This work provides a feasible synthesis strategy for multifunctional composites that can be applied in indoor air purification and environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
IET Nanodielectrics
·
2026
·Vol. 9
·期 1
·e70033
·
IF 4.3
Heyu Wang,Zhonglei Li,Zechao Yang,Boxue Du
Polypropylene (PP) insulation for HVDC cables faces critical challenges under combined high-temperature and high-field conditions, including elevated conductivity and electric field distortion. To elucidate the role of interfacial structure engineering in governing carrier confinement mechanisms, three PP composites were developed, incorporating bare CdSe quantum dots (QDs), silane-modified CdSe@KH570 QDs and CdSe@ZnS core–shell QDs, each at 0.10 wt% loading. At 90°C, PP/CdSe@ZnS achieves a characteristic breakdown strength of 284.9 kV/mm with 44.8% enhancement and exhibits an 87.5% reduction in conductivity, significantly outperforming other modifications. Thermally stimulated depolarisation current measurements reveal that core–shell quantum dots introduce deep trap levels at 1.06 eV compared to 1.02 eV for bare CdSe composites. Interfacial potential barrier and carrier probability distribution analysis demonstrate that the inorganic ZnS shell creates high-barrier double confinement for both electrons and holes with spatial separation that minimises recombination. In contrast, the valence band energy of the organic KH570 coating closely matches that of CdSe, resulting in hole wavefunction extension into the organic layer and substantial electron–hole overlap that increases recombination probability. These findings demonstrate that interfacial engineering through inorganic core–shell architectures provides optimal carrier confinement for next-generation HVDC cable insulation operating under demanding electrothermal conditions.
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2022
·Vol. 43
·期 3
·1476-1484
·
IF 3.531
Zheng Li,Kexin Wang,Xudong Liu,Jiaoli Hu,Jie Zhang,Guorui Yang,Ruihang Xie,Jialiang Zhang,Yuhui Ao
To enhance the interfacial adhesion of short carbon fiber (SCF) reinforced polypropylene (PP) composites, a new modified chlorinated polypropylene resin (g-CPP) was synthesized and utilized to manufacture the sizing agent for SCF. The findings of thermogravimetric analysis and differential scanning calorimetry showed that g-CPP had high thermal characteristics, with its glass transition temperature (Tg) raised by 11°C.The g-CPP sizing agent that has been developed has increased storage stability (particle size was 109.8 nm). The contact angle of SCF was reduced from 81.52° to 60.04° after sizing, and the surface free energy was raised from 29.31 mN/m soared to 47.13 mN/m. The SCF/PP composites with 1 wt% sizing agent demonstrated the best interfacial adhesion, with improvements in flexural and tensile strengths of 54% and 39%, respectively. The interfacial reinforcement mechanism of sizing agent to improve interfacial adhesion was investigated. This work proposes an attractive way for the future preparation of high-performance SCF/PP composites.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 3
·901-912
·
IF 2.2
Peng Hao-Kai,Shi Yong-Ye,Yu Yang,Li Ting-Ting,Zhang Xiao-Yang,Fan Xiao-xuan,Lin Jia-Horng
In recent years, flexible wearable sensors received significant attention from academia. Most sensors feature a single mode. Consequently, the production of wearable multimode flexible sensors that possess characteristics of flexibility, multimodal, and sensitivity remains a challenge. In this study, a fabric-based dual-mode flexible sensor is proposed. A polypropylene (PP) nonwoven fabric is first modified using polydopamine, impregnated with carbon ink, and low-temperature polymerized with pyrrole. Although the resulting sensors can detect stimuli from temperature and pressure, they also exhibit certain characteristics, such as lightweight, softness, and air permeability. Test results indicate that the flexible sensors efficiently function in detecting temperature and pressure, showing good stability. Specifically, the sensors exhibit adequate abilities in measuring and distinguishing two stimuli with a maximal temperature sensitivity coefficient of 0.447% °C −1 and sensitivity of 0.228 kPa −1 at a pressure zone of 0–45 kPa. The test results prove that dual-mode sensors demonstrate more advantages than single-mode ones. Therefore, the proposed sensors are a valuable reference for wearable equipment in the sports and health hygiene fields.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 10
·679-688
·
IF 1.808
Yan Yan,Chang-Ying Hu,Zhi-Wei Wang,Zi-Wei Jiang
Food contact materials contain non-intentionally added substances from degradation, and reaction processes could rise food safety problems. Three polypropylene random copolymer composite films were prepared by extruding the polypropylene random copolymer matrix with Irgafos 168, Irgafos 168 and nanocopper, Irgafos 168 and KH550 modified nanocooper, respectively. To evaluate the degradation behaviors of Irgafos 168, the films were treated by UV irradiation, microwave treatment, sunlight exposure, placed in different oxygen concentration conditions, suffered the extrusion process, and high temperature. Migration test was conducted at 20°C, 40°C, and 70°C with films tested in food simulant. GC-MS was adopted to determine the concentration of Irgafos 168 and its two degradation products, 2,4-di-tert-butylphenol (DP1) and tris (2,4-di-tert-butylphenyl) phosphate (DP2). UV irradiation significantly accelerated the degradation of Irgafos 168 compared with other treatments; DP1 and DP2 increased to maximum value at 24 hours and decreased afterwards, simultaneously. The introduction of nanocopper notably promoted DP1 generation after extrusion whereas suppressed DP2 generation which also caused a higher degradation rate of Irgafos 168 and sharp decrease of DP1 under microwave treatment, sunlight exposure, and high temperature treatment. No significant difference between the effects of nanocopper and KH550 modified nanocopper on degradation of Irgafos 168 was found. For the migration test, the introduction of nanocopper inhibited the migration of Irgafos 168 and DP2 whereas promoted the migration of DP1. No significant difference between the introduction of nanocopper and KH550 modified nanocopper on migration of Irgafos 168 and DP1, DP2 was found.
研究领域:
食品安全
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 23
·14424-14429
·
IF 3.945
Wenwen Deng,Weibo Shi,Shuchan Wang,Zehua Yan,Zhen Rui,Qingling Wang,Chang Ming Li
We innovatively used a polypropylene (PP) separator as a substrate and PEO-LiTFSI-SN as a paste to coat on both of the PP surfaces, and formed a sandwich-like solid polymer electrolyte (SPE). The SPE shows a conductivity of 4.22 × 10−3 S cm−1 at room temperature and 7.75 × 10−5 S cm−1 at 0 °C. The pyrene-4,5,9,10-tetraone (PTO)||SPE||Li battery shows a maximum discharge specific capacity of 187.8 mA h g−1 at a current density of 20 mA g−1 under 0 °C. After 100 cycles, the capacity could still be obtained at 88.4 mA h g−1, and the coulombic efficiency stayed stable at 98%. This work paved a new way for the development of solid-state organic batteries (SSOBs) at low temperatures.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）