ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 41
·94185-94194
·
IF 5.8
Chen Zi-Le,Zhang Yu-Nan,Guo Jian-Zhong,Chen Lin,Li Bing
Hydrochar is an environmentally friendly and cheap adsorbent, but its adsorption amounts for anions is very limited. The functionalized hydrochar can overcome this shortcoming. Herein, polyethyleneimine-modified hydrochar (PEI-HC) was synthesized from hydrothermal carbonization (HTC) of methyl acrylate and bamboo after addition of initiator ammonium persulfate, and then modified by polyethyleneimine (PEI), which was used to treat Cr(VI). PEI-HC was tested by XANES, EXAFS, SEM-EDS, XPS, FTIR, N 2 sorption isotherms, zeta potential, and elemental analyses. The characterizations showed that PEI was successfully grafted onto hydrochar, and the PEI-HC was rich in N and O functional groups, which presented high Cr(VI) sorption ability (528.41 mg·g −1 at pH 2). The bath experiments found the pseudo-second-order kinetic and Freundlich equations can well describe the adsorption kinetics and isotherm of the Cr(VI) adsorption onto PEI-HC, respectively. Electrostatic interaction, reduction, complexation, and H-bonding are the main removal mechanisms as supported by XANES, EXAFS, XPS, and FTIR. This study provides a strategy of combining HTC and free radical graft polymerization to convert agricultural and forestry wastes into functionalized hydrochar, showing highly efficient removal of Cr(VI).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Letters
·
2023
·Vol. 33
·期 7
·2153-2159
·
IF 4.5
Cao Song
Dimethyl silicone oil is widely used due to its excellent thermal stability and good wetting properties. In this study, a series of thermal conductive materials was prepared by physically blending and chemically loading graphene as a thermal conductive filler into dimethyl silicone oil, and their thermal conductivity and tribological properties were investigated. The thermal conductivity of the composites was tested by a thermal conductivity meter and a thermal imaging camera, while the tribological properties of the composites were evaluated using a CSM friction and wear tester. The results showed that both thermal conductivity and tribological properties were improved to a certain extent. The particle size and amount of graphene had a significant influence on the thermal conductivity. For graphene with a single particle size, the thermal conductivity increased with increasing graphene content. The friction coefficient under dry friction conditions was significantly reduced by adding graphene to the silicone oil, as revealed by the friction and wear test.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 24
·1-19
·
IF 2.8
Chen Haixue,Wang Xinyue,Zeng Zejun,Zhang Guoqi,Zhang Jing,Liu Pan
With the development of electronic technology towards high power, miniaturization, and system integration, power electronic packaging is facing increasing challenges, especially for die attachment. This research aims to explore silver-coated copper (Cu@Ag) paste with sufficient mechanical properties and high-temperature reliability, as an alternative solution for silver sintering with lower cost. Firstly, micro-Cu@Ag sintering pastes were investigated under four kinds of polyol-based solvent systems and two types of particle morphologies, which included sphere-type (SCu@Ag) and flake-type (FCu@Ag). Sintering performance and microstructural evolution were compared and analyzed. Notably, sintered joints employing the terpineol–polyethylene glycol solvent system and flake-type morphology displayed a denser microstructure in comparison to SCu@Ag joints. Its bonding strength reached 36.15 MPa, which was approximately 20% higher than SCu@Ag joints. Subsequently, the influence of key sintering process parameters on Cu@Ag joints was analyzed, including sintering temperature, pressure and time. Additionally, high-temperature aging and thermal cycling tests were conducted on the optimized Cu@Ag joints to assess their reliability. Finally, the micromechanical properties of Cu@Ag joints before and after high-temperature aging were further evaluated by nanoindentation including creep properties. The elastoplastic constitutive models of Cu@Ag sintered materials with different particle morphologies were constructed, providing valuable insights for reliability evaluation. The results indicated that FCu@Ag joints exhibited satisfactory creep resistance and high-temperature reliability. In conclusion, the FCu@Ag micro-paste based on the terpineol–polyethylene glycol solvent system proposed in this study demonstrated sufficient bonding strength, high reliability, and adequate mechanical properties as an attractive solution for high-temperature power electronics packaging.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 9
·1-10
·
IF 5.7
Hong Tingting,Liu Xing,Ji Yibing,Tan Songwen,Cai Zhiqiang
Novel chiral capillary electrochromatography (CEC) microsystems were constructed based on Aspergillus sp. CM96. As a newly discovered intrinsic characteristic of the cell, cell chirality occupies an essential position in life evolution. Aspergillus sp. CM96 spore (CM96s) was chosen as a proof of concept to develop chiral capillary columns. Interestingly, various types of amino acid (AA) enantiomers were baseline separated under the optimized conditions. Furthermore, the time-dependent chiral interactions between AAs and CM96s were explored in a wider space. Pectinases generated from Aspergillus sp. CM96 fermentation were immobilized onto graphene oxide–functionalized capillary silica monoliths for separating AA enantiomers. Molecular docking simulations were performed to explore chiral separation mechanisms of pectinase for AA enantiomers. These results indicated that Aspergillus sp. CM96-based CEC microsystems have a significant advantage for chiral separation. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Zhang Lin,Peng Li,Lu Yuanchao,Ming Xin,Sun Yuxin,Xu Xiaoyi,Xia Yuxing,Pang Kai,Fang Wenzhang,Huang Ning,Xu Zhen,Ying Yibin,Liu Yingjun,Fu Yingchun,Gao Chao
Wet-chemical synthesis via heating bulk solution is powerful to obtain nanomaterials. However, it still suffers from limited reaction rate, controllability, and massive consumption of energy/reactants, particularly for the synthesis on specific substrates. Herein, we present an innovative wet-interfacial Joule heating (WIJH) approach to synthesize various nanomaterials in a sub-second ultrafast, programmable, and energy/reactant-saving manner. In the WIJH, Joule heat generated by the graphene film (GF) is confined at the substrate-solution interface. Accompanied by instantaneous evaporation of the solvent, the temperature is steeply improved and the precursors are concentrated, thereby synergistically accelerating and controlling the nucleation and growth of nanomaterials on the substrate. WIJH leads to a record high crystallization rate of HKUST-1 (~1.97 μm s −1 ), an ultralow energy cost (9.55 × 10 −6 kWh cm −2 ) and low precursor concentrations, which are up to 5 orders of magnitude faster, −6 and −2 orders of magnitude lower than traditional methods, respectively. Moreover, WIJH could handily customize the products’ amount, size, and morphology via programming the electrified procedures. The as-prepared HKUST-1/GF enables the Joule-heating-controllable and low-energy-required capture and liberation towards CO 2 . This study opens up a new methodology towards the superefficient synthesis of nanomaterials and solvent-involved Joule heating.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 12
·3487-3504
·
IF 2.5
Liu Cansen,Wu Xianhong,Xu Jianyu,Li Jinyan,Xie Huisi
Developing a coated metal mold to avoid scuff, corrosion, and fouling in rubber vulcanization condition remains challenging. Here, a composite coating is described which combines resistance to fouling, wear, and corrosion by incorporating low surface energy tungsten disulfide (WS 2 ) into a robust cobalt (Co) matrix for wear and corrosion resistance together with antifouling. The dispersity of WS 2 in the electroplating solution is improved by combining chemical modification with mechanical milling. The addition of 2 g/L WS 2 to the electroplating bath produced a Co-WS 2 composite coating with effective tribological and anticorrosion performance in 3.5 wt.% standing NaCl solution at 25 ℃ as well as superior antifouling behavior in rubber vulcanization conducted at 160 ℃ and 9.8 Mpa. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2023
·
IF 5.3
Bei Yu,Hu Yun,Jia Puyou,Ma Yufeng,Hu Feilong,Xiao Tong,Yang Yong,Zhou Yonghong
Developing bio-based hyperbranched ester plasticizers using woody oil by a simple strategy to replace toxic phthalate plasticizers has significant social, environmental, and economic significance. Herein, a series of tung oil-based hyperbranched esters (TPPs) were synthesis through a one-pot method, the degree of branching and relative molecular weight of the TPPs were controlled by adjusting the glycidyl content. The TPPs were used to plasticize polyvinyl chloride (PVC) materials. The results indicated that TPPs showed better plasticizing properties, transmittance and migration stability compared with commercial dioctyl phthalate (DOP). For instance, the tensile strain of PVC/TPP-9 reached to 560%, and transmittance was 42.1%. In addition, the PVC/TPPs films possessed excellent shape memory performance, and shape fixity and shape recovery were up to 97 and 91%, respectively. The cohesive energy was simulated and calculated from the perspective of energy to first predict the ability of plasticizers migrated from the PVC matrix. These hyperbranched ester plasticizers exhibited the potential to substitute DOP in the fields with strict requirements (e.g. food packaging, toys for children).
✓ 已验证
产品关联
DOI
高影响因子
IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-ANIMAL
·
2023
·
IF 2.1
Ke Shenghui,Feng Yiwei,Luo Liying,Qin Wanzhao,Liu Huayu,Nie Jingchong,Liang Beijiang,Ma Hongjie,Xie Mao,Li Jingyu,Niu Zhijie,Li Guojian,Tang Anzhou,Xia Wei,He Guangyao
A method for the in vitro isolation, purification, identification, and induced differentiation of satellite cells from adult tree shrew skeletal muscle was established. The mixed enzyme digestion method and differential adhesion method were used to obtain skeletal muscle satellite cells, which were identified and induced to differentiate to verify their pluripotency. The use of a mixture of collagenase II, hyaluronidase IV, and DNase I is an efficient method for isolating adult tree shrew skeletal muscle satellite cells. The P3 generation of cells had good morphology, rapid proliferation, high viability, and an “S”-shaped growth curve. Reverse transcription-polymerase chain reaction (RT-PCR) and immunofluorescence staining indicated that marker genes or proteins were expressed in skeletal muscle satellite cells. After myogenic differentiation was induced, multiple-nucleated myotubes were observed, and the MyHC protein was expressed. The expression of myogenic marker genes changed with the differentiation process. After the induction of adipogenic differentiation, orange-red lipid droplets were observed, and the expression of adipogenic marker genes increased gradually with the differentiation process. In summary, satellite cells from adult tree shrew skeletal muscle were successfully isolated using a mixed enzyme digestion method, and their potential for differentiation into myogenic and adipogenic cells was confirmed, laying a foundation for further in vitro study of tree shrew muscle damage.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Drug Delivery and Translational Research
·
2023
·
IF 5.4
Liu Jie,Lin Chenshi,Wu Man,Wang Yingjie,Chen Shenyu,Yang Taiwang,Xie Chenlu,Kong Yue,Wu Wenliang,Wang Jiaping,Ma Xiaonan,Teng Chao
Uric acid is the final metabolite in humans. High level of uric acid chronically induces urate deposition, aggravates kidney damage, and concomitantly causes an increase in inflammatory factors. Alleviating acute inflammation and decreasing uric acid levels are the key points in the treatment of inflammatory diseases associated with high uric acid. However, a drug delivery system that combines anti-inflammatory and uric acid reduction functions at the same time remains a challenge to be settled. Here, we designed a nanocrystal-based co-delivery platform, IND Nplex, characterized by loading of indomethacin (IND) and uricase. Compared with free IND or uricase, IND Nplex possessed a better anti-inflammatory effect by restraining the release of inflammation-related factors in vitro. In addition, pharmacokinetic and biodistribution studies revealed that IND Nplex significantly prolonged the retention time in vivo and was more concentrated in the kidney. In acute gouty arthritis model rats, IND Nplex markedly relieved ankle joint swelling and mitigated synovial inflammation. In acute kidney injury model rats, IND Nplex indicated better biocompatibility and significant amelioration of renal fibrosis. Moreover, IND Nplex showed the effect of anti-inflammatory and improved renal function via determination of inflammatory factors and biochemical markers in the serum and kidney. In conclusion, these results indicate that IND Nplex exerts anti-inflammatory activity and uric acid–lowering effect and could become a promising candidate for the treatment of uric acid–related diseases. Graphical Abstract
In this study, a stable neutral co-delivery platform (IND Nplex) was fabricated by using a co-delivery strategy, allowing for a combination of the anti-inflammation drug IND and the metabolic enzyme uricase. IND Nplex showed a good therapeutic effect on rats with acute gouty arthritis or acute kidney injury due to the dual effects of anti-inflammatory and uric acid lowering. This platform provided a novel strategy for high uric acid–related illnesses.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2023
·
IF 2.3
Zhang Cong,Feng Shuangjiu,Kan Xucai,Chi Shangpeng,Sun Wei,Li Mingling,Liu Xiansong
Soft magnetic composites mean ferromagnetic powder coated by an electrical insulation layer, which is often used for high-power electromagnetic applications. In this work, toroidal magnetic cores such as FeSiAl and FeNi were fabricated by injection molding, and the electromagnetic properties were studied. Magnetic hysteresis loops of composite samples were measured at 25 and 100 °C to study the change of saturation magnetization and coercivity at room temperature and operating temperature. Effective permeability values of magnetic cores were between 8.8 and 18.9, and they were relatively stable within the frequency range of 70 MHz. Each kind of magnetic core shows low power loss at the frequency range of 100 kHz to 1 MHz, and the power loss of FeSiAl core was as low as 168 mW/cm 3 at 1 MHz and 20 mT. DC bias permeability of all samples exceeded 70% at a bias field of 300 Oe. Compared with the high-pressure molded core, the injection magnetic cores have lower power loss and good DC bias characteristics, which are beneficial to the application of high frequency and high current.
✓ 已验证
DOI
高影响因子
Friction
·
2023
·
IF 6.8
Yang Xiao,Wang Yunbo,Cao Weihua,Jiang Ruizheng,Xie Guoxin,Cao Yuying,Qi Xiaowen
To utilize Cu-benzene-1,3,5-tricarboxylate (Cu-BTC) adsorbed lubricant oils in the self-lubricating field, the adsorption properties of Cu-BTC on different 1-olefins must be clarified. In this work, 1-hexene, 1-octene, 1-nonene, 1-decene, 1-undecene, and 1-dodecene were studied by the Monte Carlo method and experimentally. The adsorption limit of Cu-BTC for n-olefins was determined as 1-undecene by the adsorption isotherms. This suggested a limit for even straight-chain molecules to the adsorption of Cu-BTC. The maximum ratio of the olefin length of the largest pore diameter ( L / D ) of Cu-BTC was approximately 1.57. Furthermore, theoretical calculations (radial distribution function (RDF)) and experiments (infrared (IR) spectra) confirmed the interaction of n-olefin adsorbates and the Cu-BTC framework occurred between the -CH= of olefins and the Cu and O atoms of the Cu-BTC framework. This work adds to the understanding and investigation of the adsorption of liquid lubricants using Cu-BTC as a metal-organic framework (MOF).
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Fang Diyi,Liu Chuanlei,Chen Yu,Peng Qilong,Wu Kongguo,Chen Yuxiang,Jiang Hao,Wu Yuan,Shen Benxian,Wu Qiumin,Wu Di,Sun Hui
Porous heterogeneous lyophobic systems (HLSs) find potential applications in energy restoring, dissipating, and absorbing. However, the development of controllable HLSs still lacks rational structure design of nanoporous materials matching the molecular sizes of adopted liquids. Besides that, thoroughly understanding the underlying transportation mechanism in the confined nano channels is greatly challenging. In this work, a series of Co/Zn bimetallic zeolitic imidazolate frameworks (ZIFs) with tunable structures were synthesized via regulating the Co to Zn ratios and employed to investigate the intrusion–extrusion of liquid water in confined nanopores. Structural characterizations confirm the heterometallic coordination in the Co/Zn-doped frameworks. Water intrusion–extrusion experiments unlock the relationship between the intrusion pressure and the nanopore size and realize the evolution of the HLSs between molecular spring and shock-absorber. In addition, cycling tests indicate the reversible structure change of Co/Zn ZIFs encountering pressure-induced water intrusion. In combination with molecular dynamics simulations, we present that the water multimers intrude into nanopores of ZIFs in chain-like forms along with dissociation of hydrogen bonds (HBs). Water molecules in the pre-intrusion state exhibit reduced HBs in response to the increase of pressure and linear structure with 1.6–3.0 HBs on average. After transition to the post-intrusion situation, the associative configuration of water tends to exhibit the tetrahedral structure. Herein, we highlight the roles of pore size and HB in synergically dominating the pressure-induced intrusion–extrusion of liquid water in hydrophobic nanopores. Furthermore, the present work can also guide the development of functional guest–host systems based on porous architectures.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）