Surfaces and Interfaces
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2024
·
IF 5.7
Wenqin Lu,Danni Hu,Huang juan Li,Zhenfei Feng,Huayu Hu,Yanjuan Zhang,Tao Gan,Zuqiang Huang
Two-dimensional layered materials (2DLMs) as lubricant additives have received increasing attention due to their low interlaminar shear stress, outstanding chemical stability and lubrication effects, but the extreme pressure properties, dispersion and dispersion stability in base oils are poor. Herein, a hydrophobic zinc borate/polydopamine/talc (OA-ZB/PDA/TA) nanocomposite with sandwich-like structure is prepared by hydrothermal-assisted intercalation combined with mechanical activation process using natural talc 2DLMs as substrate and oleic acid (OA) as a surface hydrophobic modifier and peeling aid. No obvious sedimentation of OA-ZB/PDA/TA occurs in the rapeseed oil after 15 d, while pure TA is significantly deposited after 12 h, showing superior dispersion and dispersion stability. The OA-ZB/PDA/TA used as a lubricant additive in rapeseed oil exhibits excellent tribological performances under the loads from 147 to 784 N, particularly, wear scar diameter and coefficient of friction reduce by 51.4 and 33.7 % under 392 N, respectively, and the maximum nonseizure load ( P B ) increases by 27.0 % relative to pure TA. The TA-ZB-TA "sandwich-like" structure gives full play to the synergistic lubrication between ZB NPs and TA, resulting in the sliding and rolling effects under low load, friction film and rolling effect under medium load, and friction film under high load. Our work provides a new avenue for the enhanced extreme pressure properties and dispersion stability of 2DLMs in base oil.
研究领域:
材料科学
·
摩擦学
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产品关联
DOI
高影响因子
POLYMER COMPOSITES
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2017
·
IF 2.324
Yangyang Hong,Lijie Chen,Guolin Song,David Bassir,Simin Cheng,Xinghong Shi,Haifeng Liu,Guoyi Tang
The biodegradable composites with low cost and excellent mechanical property, namely PLA/talc blends, have been successfully prepared by using epoxidized soybean oil (ESO) as a reactive compatibilizer with the presence of peroxides to accelerate the in situ grafting between talc and other components. The surface treatment of talc powder was performed through the in situ reactions of its rich hydroxyl groups with the epoxide ring of ESO and scission radical of PLA during the blending process. Both FTIR and the extracting experiment results verified that surface modification mechanisms. Such a facile and efficient one-step process can bring a dramatic improvement on both miscibility and mechanical properties of the PLA/talc composites. POLYM. COMPOS., 39:E1618–E1625, 2018. © 2017 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
Advances in Applied Ceramics
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2017
·
IF 1.325
Yuanyuan Sun,Jingde Zhang,Shuaishuai Lu,Huichao Liu
Porous cordierite ceramics were synthesised by gel-casting method, using talcum powder, kaolin and alumina as raw materials. Organic monomers and cross-linker were used as additives. The phase composition and microstructure were investigated by X-ray diffraction and scanning electron microscope. The open porosity, compressive strength and thermal expansion coefficient were tested by the Archimedes method, universal testing machine and thermal expansion instrument, respectively. The results indicate that sintering temperature and holding time have a great influence on the cordierite properties. We obtain the good performance of porous cordierite ceramic sintering at 1350°C for 3 h. The cordierite phase content in the sample is higher and the crystallinity is better. At this point, the porosity is 58.53%, the compressive strength is 22.44 MPa and thermal expansion coefficient reaches 1.69 × 10−6 °C−1.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
Arabian Journal of Chemistry
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2022
·
IF 6.212
Shiping Wang,Xiang Li,Kun Ren,Rui Huang,Ganchang Lei,Lijuan Shen,Yingying Zhan,Lilong Jiang
The high cost and difficulty in sustainability have hindered the wide application of the general synthetic resins in the controlled-release fertilizers (CRF). Here, the degradable castor oil-based polyurethane (PU) was filled by the natural pyrophyllite (PY) powders, which were pre-modified with few amount (≤0.5 %) of NDZ-201 coupling agent though a simple and economic mechanochemical method. Furthermore, the composite materials of PU and the modified PY (MPY/PU) with enhanced comprehensive properties were prepared and applied in CRF. Moreover, the release behaviors of the coated fertilizers were investigated while tuning the addition amount of modifier or the filling amount of MPY, and it was confirmed that the release performance was highly depended on the hydrophobic and mechanical properties of the composite coating. As a result, the best optimized MPY/PU coating exhibited significantly superior performance to the pure PU materials, and the duration of 80 % nitrogen release was more than 40 days. This confirms that the MPY/PU composite is a promising coating material for the CRF granules.
研究领域:
材料科学
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农业科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Tiancheng Ouyang,Wenwu Lei,Wentao Tang,Liang Cheng,Yudong Shen
Poor lubrication can lead to sever wear of mechanical equipment and even cause its failure, nevertheless, lubricating additives are able to effectively alleviate the negative results. In this work, nano-additive lubricants used in the interface of steel tribo-pairs are prepared by inorganic fullerene-like tungsten disulfide and talcum nanoparticles, which can improve the friction-reduction and wear-resistance performances of base lubricant by as much as 25% and 50%, respectively. On the one hand, the macroscopic characterization reveals that the improved tribological performance comes from the synergistic effect of the two nano nanoparticles. On the other hand, the phenomenon has been further explored by molecular dynamics. The macroscopic and microscopic interface interaction mechanism between the nano-additives, investigated in the study, indicate valuable reference for the investigation of improved nano-additive lubricating oil in the future.
研究领域:
材料科学
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机械工程
·
表面工程
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产品关联
DOI
高影响因子
Polymers
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2024
·Vol. 17
·期 1
·67
·
IF 4.7
Xianrong Yang,Huan Shuai,Gaoxiang Du,Jiao Wang,Jie Shen
In this study, waterborne polyurethane (WPU), a novel modifier, was used for the wet surface modification of talc, and its mechanism was investigated. Polypropylene (PP)-based composites with modified talc were synthesized and subjected to an examination of their mechanical properties. The wetting contact angle demonstrated that the modified talc exhibited an excellent modification effect at a specific amount of modifier (2.0 wt.%). The X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) results indicated the successful coating of WPU on the surface of the talc particles. SEM images revealed that modified talc displayed improved wettability, compatibility, and dispersion in PP/talc + WPU composites. The mechanical properties results showed that the PP/talc + WPU composites ensured superior comprehensive properties with a flexural strength of 55.9 MPa, impact strength of 4.72 kJ/m2, tensile strength of 34.8 MPa, and elongation of breaks of 32.4%. The incorporation of WPU-modified talc into plastic materials has been synthesized to leverage its beneficial properties, leading to reduced production costs and improved performance and functionality of the final product.
研究领域:
材料科学
·
高分子化学
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DOI
PubMed
高影响因子
Additive Manufacturing
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2024
·
IF 10.3
Shuhao Qi,Qin Lian,Yanlong Chen,Tao Zhou,Chuncheng Yang,Dichen Li
In the bottom-up vat photopolymerization process for ceramic materials, the as-built part is generated layer-by-layer from the bottom of the slurry vat. The separation process between the solidified layer and the bottom of the slurry vat introduces significant vertical separation forces due to various resistance forces. Particularly in fabricating large cross-section parts, larger separation forces are more prone to induce crack propagation or detachment of the as-built part from the substrate, resulting in printing failures. This study introduces a novel approach involving the application of a talcum powder-coated polydimethylsiloxane (PDMS) film to address this issue, aiming to reduce the adhesion between the PDMS film and the bottom of the slurry vat. The developed system exhibits flexible separation capabilities during the build platform's lifting process. Compared to traditional unmodified PDMS film separation systems, the modified system demonstrates an average reduction of 93% in the maximum separation force. Notably, as the cross-sectional area of the printing increases, the magnitude of the increase in maximum separation force of the modified system compared to the unmodified system drops significantly. This characteristic facilitates the successful printing of larger-sized parts. The talcum powder-coated PDMS separation system proves effective in successfully printing aviation ceramic cores, triply periodic minimal surface (TPMS) models, teeth model with a cross-sectional size of 85 mm × 65 mm in solid geometry and a bone model exceeding 150 mm in height.
研究领域:
材料科学
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增材制造
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Le Jing,Yuxuan Wang,Juan Li,Xuemei Lin,Lei Liu,Ying Chen,Huangyan Liu,Zongrong Ying
N -methyl-morpholine-N-oxide (NMMO) was initially created as a plasticizer for starch to produce thermoplastic wheat starch . Subsequently, talc powder was used as a reinforcing filler to enhance the mechanical strength of thermoplastic biomass-based composite plastics. The chemical structure , crystal structure, and microscopic morphology were analyzed using Fourier transform infrared spectroscopy , X-ray diffraction, and scanning electron microscopy . Additionally, the thermal properties were explored through thermogravimetric analysis , differential scanning calorimetry , and dynamic mechanical analysis . The hydrated NMMO plasticizer demonstrated an outstanding plasticizing effect on starch, resulting in a composite with remarkable mechanical properties. In fact, the pure thermoplastic wheat starch plasticized with hydrated NMMO exhibited the highest mechanical strength recorded so far, with a tensile strength of up to 9.4 MPa. In addition, talcum powder displayed a noticeable reinforcing effect. When the talcum powder content reached 30 wt%, the targeted composite achieved a tensile strength of 20.5 MPa and a Young's modulus of 177.9 MPa. These values were 118 % and 48 % higher, respectively, than those of the pure thermoplastic starch sample. This innovative plasticizing method opens up a new avenue for the development of high-mechanical-strength thermoplastic biomass-based composite plastics with promising potential applications.
研究领域:
材料科学
·
生物材料
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产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
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2025
·
IF 3.4
Zheng-Hao Li,Zheng Cheng,Jianglei Zhang,Xue-Yuan Guo,Yang Li,Shu-Chao Gong,Guangdong Chen,Ning-Ning Zhang,Junhu Zhang,Chuipeng Kong,Irshad Hussain,Kun Liu,Yang Yang
The crystallization behavior of the organic molecule 5-methyl-2-[(2-nitrophenyl) amino]-3-thiophenecarbonitrile (known as ROY for its red, orange, and yellow crystals) was systematically regulated by using various natural mineral particles as heterogeneous nucleating agents. Polarized light microscopy and X-ray diffraction demonstrated that different types of mineral nucleating agents significantly influenced the resulting polymorphic forms of ROY, establishing a clear correlation between the nucleating agent type and the crystal form. Scanning electron microscopy and in situ video microscopy provided detailed insights into the nucleation sites and crystal growth dynamics. Remarkably, these nucleating agents consistently induced specific polymorphs under different crystallization methods and conditions while also modulating the dominant crystal facets. This study highlights the critical role of mineral nucleating agents in manipulating the crystallization process and tailoring the resulting crystal products.
研究领域:
材料科学
·
晶体学
·
药剂学
·
物理化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jiasen Zhang,Lin Zhang,Xufei Liu,Bokun Jia,Kai Xie
To mitigate the environmental pressures associated with waste management, it is crucial to adopt scientific and rational approaches to solid waste treatment. This study introduces a novel gravity-driven membrane (GDM) that utilizes industrial solid waste as its structural framework, significantly enhancing algae removal efficiency. The industrial solid wastes examined include bayer red mud (BRM), sintered red mud (SRM), fly ash (FA), and gangue (GA). Notably, the adsorption energy (E ads ) of modified iron atoms on BRM was found to be −0.532 eV, indicating robust interaction forces. The adsorption efficiency of the GDM is primarily governed by the Lewis acid-base interactions ( Δ U fwm AB ). Further analysis combining interaction energy with fluorescence characteristics demonstrates the effectiveness of the Fe–O network in BRM at extracting tryptophan protein-like substances from the membrane pores. The algae removal efficiency of the GDM incorporating BRM reached 66.71 %, suggesting a promising application for filtering algal-rich waters at the molecular level within ceramic matrices.
研究领域:
环境科学
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材料科学
·
水处理技术
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产品关联
DOI
高影响因子
Small Science
·
2025
·
IF 8.3
Yuxing Gu,Yair Ein-Eli,Woo Jin Hyun
Ionogels composed of solid matrices and ionic liquids are promising candidates as solid-state electrolytes for sodium (Na) metal batteries due to their nonflammability, high thermal stability, and desirable electrochemical and interfacial properties. Among various solid matrices, nanoscale materials are particularly attractive for increasing the mechanical modulus of ionogel electrolytes, contributing to the suppression of Na dendrite growth on metal anodes. However, the mechanistic understanding of this suppression remains limited. Here, size-controlled talc nanosheets are introduced as solid matrices to investigate their influence on the ionogel modulus and the corresponding Na dendrite growth behavior, facilitating the rational design of ionogel electrolytes for dendrite suppression. Talc nanosheets with reduced lateral dimensions and thicknesses provide larger surface areas, enhancing the ionogel modulus through stronger immobilization of ionic liquids. High-modulus ionogels with smaller nanosheets promote uniform Na deposition and reinforce the resistance of the electrolytes to vertical Na dendrite growth. Moreover, smaller talc nanosheets improve the Na-ion transference number of ionogel electrolytes. The resulting talc nanosheet ionogel electrolytes enable Na 3 V 2 (PO 4 ) 3 |Na cells to exhibit favorable rate capability at room temperature with capacity retention over 99% after 500 cycles at a rate of 0.5 C.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2024
·
IF 3
Ma Xin-Yue,Cao Fang-Chao,Tang Yan,Jiang Jun-Cheng,Huang An-Chi
In this paper, a modified material EG-PR with hydrophobic and oleophobic properties was successfully prepared with expanded graphite (EG) as the main raw material and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PR) and silane coupler KH-570 (KH) as surface modifiers. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy verified the effective modification that produced a Si‒O‒Si network structure. The water contact angle (WCA) of 127° and oil contact angle (OCA) of 110° of EG-PR, unmodified EG-IA, were 92° and 20°, respectively. Fire-extinguishing tests conducted on heptane pool fire showed that EG-PR decreased the time required to extinguish the fires by 23 s, consumed less extinguishing agent, and suppressed the production of carbon dioxide during combustion compared to EG-IA, indicating its higher effectiveness. EG-PR demonstrated rapid fire-extinguishing capabilities during the experiments. It effectively extinguished the flames, created a protective layer on the oil pool’s surface, efficiently isolated heat and oxygen, and effectively suppressed flame propagation on the surface. This study highlights the potential of surface-modified expandable graphite in enhancing fire safety applications. Graphical abstract
研究领域:
材料科学
·
消防工程
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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）