Small
·
2015
·Vol. 11
·期 37
·4959-4969
·
IF 8.368
Wenjing Qian,Jingyue Zhu,Ye Zhang,Xiao Wu,Feng Yan
The one-step synthesis of porous carbon nanoflakes possessing a 3D texture is achieved by cooking (carbonization) a mixture containing two condiments, sodium glutamate (SG) and sodium chloride, which are commonly used in kitchens. The prepared 3D porous carbons are composed of interconnected carbon nanoflakes and possess instinct heteroatom doping such as nitrogen and oxygen, which furnishes the electrochemical activity. The combination of micropores and mesopores with 3D configurations facilitates persistent and fast ion transport and shorten diffusion pathways for high-performance supercapacitor applications. Sodium glutamate carbonized at 800 °C exhibits high charge storage capacity with a specific capacitance of 320 F g −1 in 6 m KOH at a current density of 1 A g −1 and good stability over 10 000 cycles.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2019
·
IF 10.159
Huan Liu,Zhuanghe Ren,Xin Zhang,Jianjiang Hu,Mingxia Gao,Hongge Pan,Yongfeng Liu
Conduction with fast Li ion conductivity at room temperature is a major challenge for the development of all solid-state Li-ion batteries. Herein, we demonstrate a novel room-temperature ultrafast Li-ion conductor, lithium borohydride ammonia borane complexes ((LiBH4)x·AB). The incorporation of AB into the LiBH4 structure intrinsically increases the cell volume and decreases the volume density of Li ion, which substantially facilitates the Li-ion conduction. The LiBH4·AB complex delivers up to 4.04 × 10–4 S cm–1 of ion conductivity at 25 °C with nearly negligible electron conductivity. The Li-ion transference number is higher than 0.999 at 40 °C. The room-temperature Li-ion conductivity obtained is largely superior to other LiBH4-based solid-state electrolytes reported previously under identical conditions. Moreover, the ultrafast Li-ion conduction remains stable upon heating and cooling cycling (18–55 °C). Ab initio molecular dynamics simulations display a kind of 1D Li diffusion channel along the b direction in the LiBH4·AB structure, which offers a much lower activation energy barrier (0.12 eV), consequently enabling superior Li-ion conductivity at room temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
固体离子学
·
无机化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Junjie Bao,Xinbo Qu,Guoqin Qi,Qikai Huang,Shufan Wu,Can Tao,Minghao Gao,Chunhua Chen
A series of solid polymer electrolytes (SPEs) based on waterborne polyurethane (WPU), poly(ethylene oxide) (PEO) and lithium bis(trifluoromethane sulfonimide) (LiTFSI) are fabricated via a solvent free process. Field emission-scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and differential scanning calorimetry techniques are used to characterize the morphological features of the SPEs. The self-supported blend SPEs have sufficient mechanical strength and electrochemical stability compared to the pristine PEO electrolyte. The SPE2 (30 wt% LiTFSI in PEO:WPU = 3:1) electrolyte presents the superior comprehensive performance with a stress of 1.3 MPa and electrochemical window exceeding 4.8 V. All-solid-state LiFePO 4 /SPE2/Li cell using this blend solid polymer electrolyte exhibits both superior discharge capability and cycle performance (high initial discharge capacity of 160 mAh g −1 at 0.2 C, 122 mAh g −1 discharge capacity and 96% capacity retention after 100 cycles at 1 C) at 80 °C. All of these results demonstrate that this new WPU/PEO blend solid polymer electrolyte is a promising candidate for all-solid-state lithium ion batteries .
研究领域:
材料科学
·
电化学
·
高分子化学
·
能源存储
·
固态电池技术
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 20
·4101-4107
·
IF 1.915
Yujuan Cao,Wei Wu,Jiongling Wei,Song Wang,Xiaogang Hu,Ying Yu
We developed a hybrid fluorescent material using amino functional mesoporous hollow silica microspheres (MHSM) encapsulated with CdTe quantum dots (QDs). The amino group plays a key role in immobilizing both QDs and formaldehyde in the inner mesoporous hole of MHSM. The present QDs-MHSM shows good fluorescence property and excellent photostability after ultrasonic irradiation in water for several times or stewing for more than 30 days. Its fluorescence intensity is quenched rapidly in the presence of formaldehyde but not by interference with commonly organic solvents. Under the optimal experimental conditions, such as the response time and pH of the solution, a sensitive fluorescence method was developed for the analysis of formaldehyde in seafood based on fluorescence quenching of QDs-MHSM. The linear response range of formaldehyde (R2 = 0.9997) ranged from 0.2 to 15.5 mg L−1 and the detection limit (S/N = 3) was as low as 0.07 mg L−1. The recovery was 99.5% with a relative standard deviation less than 5.0%, which was consistent with that obtained by the China National Standard colorimetric method, suggesting the potential application of this sensitive and simple method in food quality monitoring or other relative fields.
研究领域:
分析化学
·
食品安全
·
纳米材料
·
荧光传感
·
食品质量监控
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Haiyang Zhang,Yuyan Liu,Hua Lai,Zhongjun Cheng,Zhimin Fan,Xiaoyan Yu,Jingfeng Wang,Zhimin Xie,Huifeng Tan
Recently, intelligent adhesive materials inspired by gecko adhesive systems have attracted great attention due to their wide applications, for example, as the gripper for capture and release of object. However, almost all existing grippers can only be applied for capturing/releasing single solid or liquid. Herein, to overcome this shortcoming, we advance a new strategy that through coating the superhydrophobic polyurethane (SPU) film onto the bucky gel actuator (BGA), and report an electric-triggered composite membrane. The membrane can bend itself under applying an external electric field and restore to the initial state as the electric filed is removed. The smart controllability allows the membrane to have a tunable adhesion to both solid and water droplet. Moreover, based on the obtained membrane, a smart gripper was fabricated, and in-situ capture/release of both solid and water droplet can be achieved. This work reports a new composite membrane with the tunable adhesion and a functional gripper that is useful for both solid and water droplet, which can not only overcome the shortcoming present in current research, but also provides a fresh idea for the designing and application of smart adhesive devices.
研究领域:
材料科学
·
仿生学
·
微纳制造
·
软体机器人
·
功能高分子材料
·
界面科学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2021
·
IF 8.301
Z. Yu,Y. Yang,C. Wang,G. Shi,J. Xie,B. Gao,Y.C. Li,Y. Wan,D. Cheng,T. Shen,S. Hou,S. Zhang,X. Ma,Y. Yao,Y. Tang,J. Chen
Although various eco-friendly and sustainable biobased polyurethane-coated controlled-release fertilizers (BPCFs) have been developed, their applications were limited by the bio-based coating contained many microscopic holes. In this work, a nano-soy-protein microcapsule-enabled self-healing biopolyurethane-coated controlled-release fertilizer (NSBCF) with enhanced controlled-release performance was fabricated. Nanoscale soy-protein microcapsules (SMCs) were prepared from soy-protein isolate (SPI) and poly (lactic-co-glycolic acid) using the water-oil-water emulsification technology. The self-healing biopolymer coatings of NSBCF with uniformly dispersed SMCs were constructed through self-assembly. The controlled-release longevity of NSBCF was >28 days longer than that of the BPCF with the unmodified coating. The self-healing mechanism of NSBCF was determined by directly observing the restoration area and the 3D pore distribution of coating using fluorescence labeling and X-ray computed tomography . After being released from the SMCs, SPI self-repaired the coating by reacting with glutaraldehyde to form solid resins to clog the microscopic holes. The SMCs-enabled self-healing process successfully reduced the nutrient release rate and extended the nutrient release longevity of NSBCF. This novel biobased controlled-released fertilizer with self-healing function represents a new direction for the development of high efficiency and environmentally friendly fertilizers to improve agriculture and food sustainability .
研究领域:
农业材料学
·
环境功能材料
·
可持续农业
·
高分子化学
·
缓释技术
·
生物基材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 92
·89821-89826
·
IF 3.289
Xinyu Wang,Defeng Xing,Nanqi Ren
The biocathode bioelectrochemical system (bioc-BES) was used for p-nitrophenol (PNP) degradation with sodium bicarbonate as the carbon source. The PNP degradation efficiency in bioc-BES with applied voltage of 0.5 V reached 96.1% ± 0.5% within 72 h, which was much higher than that obtained in the biocathode BES without applied voltage (bioc-BES-NAP), open circuit biocathode BES (OC-bioc-BES) or abiotic cathode BES (abioc-BES). With the increase in the PNP concentration from 20 mg L−1 to 60 mg L−1, the PNP concentration of the effluent decreased from 21.66 ± 2.94 mg L−1 to 0.38 ± 0.1 mg L−1 in 48 h. The final reductive product of PNP was p-aminophenol (PAP) in the biocathode chamber. High-throughput 454 pyrosequencing showed that predominant populations in the biocathode biofilm of bioc-BES were affiliated with electrochemically active Delftia and Diaphorobacter, while Aminobacter was the predominant population in the biocathode biofilm of the bioc-BES-NAP and OC-bioc-BES. These results suggested that microbial electrocatalysis and electrochemically active bacteria on the cathodic electrode accelerated PNP degradation in the biocathode BES (bioc-BES). The biocathode BES will be a promising treatment technology for PNP-containing wastewater.
研究领域:
环境微生物学
·
环境工程
·
生物电化学
·
污染物降解
·
废水处理
·
微生物生态学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 32
·46579
·
IF 1.901
Xie Li,Wei Li,Zhiqing Liu,Xiaolin Wang,Heling Guo,Rongjie Wang,Xuhong Guo,Cuihua Li,Xin Jia
Polyurethane (PU) has been widely used as a glue in various areas. However, adhesion in the presence of water is greatly impeded and results in most synthetic adhesive failure. In this study, we designed and synthesized a novel PU construction; underwater PU adhesives were created by the incorporation of synthetic glycerol monomethacrylate (GMA). Furthermore, the urethane structure helped the adhesive eliminate the interfacial water barrier through interactions that were stronger than hydrogen bonding, and GMA as a crosslinking agent was used to generate post-covalent-crosslinking networks through radical polymerization. This enhanced the cohesion so the diffusion of water molecules could be overcome. Fourier transform infrared spectroscopy, thermogravimetric analysis, underwater adhesion measurements, and tensile tests were used to characterize the chemical and mechanical properties of the as-obtained adhesive. This led to an adhesive with a better mechanical strength and interfacial adhesion in water, and the results show that the mechanical properties (tensile strength, Young's modulus, and tensile elongation) of the GMA–PU adhesive were higher than those of the pure PU. As for the 4% GMA, the tensile strength was enhanced by 24.3% and the elongation was enhanced by 125.23% over those of the pure PU. This confirmed that the incorporation of GMA into the PU matrix indeed induced increasing cohesion, and the sample's adhesive strength was 21.19 ± 3.9 MPa; this indicated a superior adhesive strength over that of the pure PU. In addition, we can foresee that underwater adhesion will play an important role in prospective surgery and engineering areas. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46579.
研究领域:
高分子材料
·
生物医学工程
·
粘附科学
·
组织工程
·
医用胶粘剂
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Shaojie Zhang,Chao Yu,Na Liu,Yun Teng,Cuiyu Yin
In this study, cellulose pulp and urea were used to synthesize cellulose carbamate (nitrogen content reaches 4.5%) by low-cost and environmentally friendly solid-liquid phase method. Cellulose carbamate fluid was prepared by using sodium hydroxide aqueous solution as solvent. The fluid was regenerated and formed in a coagulation bath , and finally a regenerated cellulose membrane with high transparency and separation ability was obtained. The simple chemical treatment of cellulose not only greatly increased the mass fraction of cellulose dissolution (It has reached 15%) and retains the original crystal form and thermal stability of cellulose. The surface of the membrane was relatively dense, and the inside has regular microchannel . The factors affect the transparency and water flux of regenerated cellulose membranes were discussed by orthogonal experimental range analysis. The ability of the regenerated cellulose membrane to reject dyes was tested. The results showed that the rejection of methyl blue and congo red reached 100%, and the rejection rate of methyl orange reached 60%. The oil/water separation ability and the anti-pollution ability of the regenerated cellulose membrane were tested. The oil/water separation effect reached 100%. This membrane may have application prospect in water treatment, biotechnology.
研究领域:
材料科学
·
环境工程
·
膜技术
·
高分子化学
·
水处理
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yueying Gao,Weiwei Meng,Ling Wang,Yuehua Li,Lei Dai
Salt melt synthesis is a kind of inorganic material synthesis method developed in modern times, which has certain potential advantages and development prospects. The sensing electrode (SE) material In 2 O 3 was synthesized by the salt melt method. The composition and morphology of the synthesized products under different conditions were studied in detail by combining XRD , SEM and TEM characterization. The results show that the salt melt method can facilely synthesize high-purity In 2 O 3 powder at a lower temperature, and its morphology changes regularly with the change of reaction conditions. The effects of synthesis times and temperatures on the gas-sensing performance of In 2 O 3 were discussed. The sensor based on In 2 O 3 (380 °C − 30 min)-SE exhibited superior gas-sensing performance in the range of NH 3 concentration of 50–500 ppm. The NH 3 response characteristics exhibited little effect at different relative humidity (RH) and oxygen partial pressure conditions. In addition, the sensor exhibited good repeatability and selectivity .
研究领域:
材料科学
·
传感器技术
·
无机合成
·
气体传感
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 40
·16028-16034
·
IF 5.101
Jun Shi,Zhengzheng Zhang,Gefei Li,Shaokui Cao
Alginate/CaCO3 hybrid beads with pH- and thermal-responsive drug release properties were prepared under compressed CO2 using aliphatic poly(urethane-amine)s (PU) as the thermal-responsive component. Polyacrylic acid (PAA) was used as a crystal growth additive to control the structure of the hybrid beads. The hybrid beads were characterized by using scanning electron microscopy, X-ray powder diffraction and thermogravimetric analysis. The interaction between PAA and aliphatic PU contributed to the formation of alginate beads with a compact CaCO3 shell. Indomethacin release behaviour was found to be pH- and thermal-responsive. The release profiles were sustained with CaCO3 microparticles, indicating that the compact CaCO3 shell could hinder the permeability of the encapsulated drug and reduce the drug release effectively. The results suggest that the hybrid alginate beads can be used as “smart” polysaccharide materials for sustained dual-responsive drug delivery.
研究领域:
生物材料
·
药物递送系统
·
高分子科学
·
纳米医学
·
药剂学
·
生物化学
·
组织工程
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2016
·Vol. 27
·期 11
·1501-1507
·
IF 1.823
Zhubo Liu,Bing Zhou,A.V. Rogachev,M.A. Yarmolenko
Polytetrafluoroethylene (PTFE) composite coatings doped copper acetate and polyurethane (PU) were prepared on rubber substrate by low-energy electron beam dispersion technique. The effects of dopant and glow discharge treatment on the surface morphology, structure and tribological properties of the coatings were investigated. The results showed that Cu–PTFE composite coatings form uniform surface and dense column structure with spherical aggregations under glow discharge treatment. PU coating shows the large size of protuberance structure but PU–PTFE coating presents spherical structure. Both of the coatings become relative dense and smooth after discharge treatment, and Cu–PU–PTFE composite coatings possess a smoother surface and lower polar component of surface energy. Cu doping weakens the crystallinity and ordering degree of composite coatings, but glow discharge increases the ordering degree and branched structure of C―H groups. Friction experiment indicated that Cu fails to improve the wear resistance of PTFE coatings but glow discharge treatment can do it. Cu–PU–PTFE coatings after discharge treatment have the higher wear resistance and lower coefficient of friction. Copyright © 2016 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
表面工程
·
高分子材料
·
摩擦学
·
等离子体物理
·
涂层技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）