Nanomanufacturing and Metrology最新文献

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Rheology and Phase Behavior of Surfactant–Oil–Water Systems and Their Relationship with O/W Nano-Emulsion’s Characteristics Obtained by Dilution 表面活性剂-油水体系的流变学、相行为及其与稀释得到的O/W纳米乳液特性的关系

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2023-01-19 DOI: 10.3390/nanomanufacturing3010002

M. Guevara, Ronald Mercado, Katty Vega, A. Cárdenas, A. Forgiarini

In order to study the relationship between the rheology of a surfactant’s concentrated dispersions and the oil and water liquid crystals from which O/W nanoemulsions (NEs) can be produced by water dilution, the phase diagram of a model SOW (surfactant–oil–water) system was constructed. The dispersion’s compositions to be characterized by rheology were chosen in the diagram’s regions that contain liquid crystal phases. For this, the dilution lines S/O = 25/75, 55/45, and 70/30 with a water content of 20 and 40 wt% (corresponding to surfactant concentrations between 15 and 55 wt%) were chosen. By adding these dispersions to a water pool, NEs were obtained, and it was shown that droplet size distribution depends on the amount of the liquid crystal phase in the initial dispersion and its rheology. The study of the oscillatory amplitude of the dispersion showed a linear viscoelastic plateau (G’ > G”) and a softening deformation region (G” > G’), indicating a viscoelastic behavior of the dispersions. The study was carried out at a constant temperature of 30 °C, and the results show that rheological characterization by itself is not enough to predict that monomodal droplet distributions are obtained. However, the presence and quantity of lamellar liquid crystal phase are important to obtain monodisperse and kinetically stable NEs.

为了研究表面活性剂浓缩分散体的流变性与水稀释制备油水纳米乳的油水液晶之间的关系，建立了模型SOW(表面活性剂-油水)体系的相图。在图中包含液晶相的区域中选择以流变性表征的分散成分。为此，选择了S/O = 25/ 75,55 /45和70/30稀释线，水含量为20和40 wt%(对应于表面活性剂浓度在15和55 wt%之间)。将这些分散体加入到一个水池中，得到了NEs，结果表明，液滴的大小分布取决于初始分散体中液晶相的数量及其流变性。对色散振荡幅值的研究表明，色散存在一个线性粘弹性平台(G′> G′)和一个软化变形区(G′> G′)，表明色散具有粘弹性特性。研究是在30℃的恒定温度下进行的，结果表明，单靠流变学表征不足以预测得到单模态的液滴分布。然而，层状液晶相的存在和数量对于获得单分散和动力学稳定的NEs至关重要。

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引用次数: 0

Manufacturing Strategies for Graphene Derivative Nanocomposites—Current Status and Fruitions 石墨烯衍生物纳米复合材料的制造策略——现状与成果

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2023-01-17 DOI: 10.3390/nanomanufacturing3010001

Ayesha Kausar, I. Ahmad, M. H. Eisa, M. Maaza, Hamdullah Khan

This review article highlights essential manufacturing strategies for the formation of graphene reinforced polymeric nanocomposites. For graphene reinforced thermoplastic, thermosetting and conducting matrix nanomaterials have been manufactured using solution casting, melt blending, in situ polymerization, electrospinning, 3D printing, and several other techniques. Solution processing has been well thought-out as an advantageous technique, relative to melt mixing, in terms of graphene dispersion in polymeric matrices. An in situ polymerization process has also been considered valuable to form homogeneously dispersed polymer/graphene nanocomposites having superior physical characteristics. Nevertheless, the manufacturing techniques for polymer/graphene nanocomposites have relative advantages and disadvantages to be considered for graphene-based nanocomposites. Moreover, numerous challenges need to be overcome to optimize the processing parameters for the fabrication of high-performance polymer/graphene nanocomposites.

这篇综述文章强调了石墨烯增强聚合物纳米复合材料形成的基本制造策略。对于石墨烯增强热塑性塑料，热固性和导电基纳米材料已经使用溶液铸造、熔融混合、原位聚合、静电纺丝、3D打印和其他几种技术制造出来。就石墨烯在聚合物基体中的分散而言，溶液处理被认为是一种相对于熔融混合的有利技术。原位聚合工艺也被认为是有价值的，以形成均匀分散的聚合物/石墨烯纳米复合材料具有优越的物理特性。然而，聚合物/石墨烯纳米复合材料的制造技术有相对的优点和缺点，需要考虑石墨烯基纳米复合材料。此外，优化高性能聚合物/石墨烯纳米复合材料的工艺参数还需要克服许多挑战。

引用次数: 4

Magnetohydrodynamic-based Internal Cooling System for a Ceramic Cutting Tool: Concept Design, Numerical Study, and Experimental Evalidation. 基于磁流体动力学的陶瓷刀具内冷却系统：概念设计、数值研究和实验验证。

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2023-01-01 Epub Date: 2023-08-29 DOI: 10.1007/s41871-023-00210-9

John O'Hara, Fengzhou Fang

The effective removal of the heat generated during mechanical cutting processes is crucial to enhancing tool life and producing workpieces with superior surface finish. The internal cooling systems used in cutting inserts employ a liquid water-based solvent as the primary medium to transport the excess thermal energy generated during the cutting process. The limitations of this approach are the low thermal conductivity of water and the need for a mechanical input to circulate the coolant around the inner chamber of the cutting tool. In this context, this paper proposes an alternative method in which liquid gallium is used as the coolant in combination with a magnetohydrodynamic (MHD) pump, which avoids the need for an external power source. Using computational fluid dynamics, we created a numerical model of an internal cooling system and then solved it under conditions in which a magnetic field was applied to the liquid metal. This was followed by a simulation study performed to evaluate the effectiveness of liquid gallium over liquid water. The results of experiments conducted under non-cooling and liquid gallium cooling conditions were analyzed and compared in terms of the tool wear rate. The results showed that after six machining cycles at a cutting speed V_c = 250 m min ^-1, the corner wear VB_c rate was 75 µm with the coolant off and 48 µm with the MHD-based coolant on, representing a decrease of 36% in tool wear. At V_c = 900 m min^-1, the corner wear VB_c rate was 75 µm with the coolant off and 246 µm with the MHD-based coolant on, representing a decrease of 31% in tool wear. When external cooling using liquid water was added, the results showed at V_c = 250 m min^-1, the difference between the tool wear rate reduction with the internal liquid gallium coolant relative to the external coolant was 29%. When the cutting speed was increased to V_c = 900 m min^-1, the difference observed between the internal liquid gallium coolant relative to the external coolant was 16%. The study proves the feasibility of using liquid gallium as a coolant to effectively remove thermal energy through internally fabricated cooling channels in cutting inserts.

有效去除机械切削过程中产生的热量对于提高刀具寿命和生产具有优异表面光洁度的工件至关重要。切削镶片中使用的内部冷却系统采用液态水基溶剂作为主要介质，以输送切削过程中产生的多余热能。这种方法的局限性在于水的低热导率以及需要机械输入以使冷却剂围绕切割工具的内腔循环。在这种情况下，本文提出了一种替代方法，将液态镓用作冷却剂，并与磁流体动力学（MHD）泵相结合，从而避免了对外部电源的需要。使用计算流体动力学，我们创建了一个内部冷却系统的数值模型，然后在对液态金属施加磁场的条件下对其进行求解。随后进行了模拟研究，以评估液态镓相对于液态水的有效性。根据刀具磨损率分析和比较了在非冷却和液态镓冷却条件下进行的实验结果。结果表明，在切削速度为Vc的六个加工循环之后 = 250 m min-1，在冷却剂关闭的情况下，角磨损VBc率为75µm，在基于MHD的冷却剂打开的情况下为48µm，这意味着刀具磨损减少了36%。在Vc = 900 m min-1，在冷却剂关闭的情况下，角磨损VBc率为75µm，在基于MHD的冷却剂打开的情况下为246µm，这意味着刀具磨损减少了31%。当加入使用液态水的外部冷却时，结果显示在Vc = 250mmin-1，内部液态镓冷却剂相对于外部冷却剂的工具磨损率降低之间的差异为29%。当切割速度增加到Vc时 = 900mmin-1，内部液态镓冷却剂与外部冷却剂之间观察到的差异为16%。该研究证明了使用液态镓作为冷却剂通过内部制造的切削刀片冷却通道有效去除热能的可行性。

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引用次数: 0

Manufacturing of Carbon Nanotube-Polystyrene Filament for 3D Printing: Nanoparticle Dispersion and Electromagnetic Properties 用于3D打印的碳纳米管-聚苯乙烯长丝的制造:纳米颗粒的分散和电磁性能

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-15 DOI: 10.3390/nanomanufacturing2040017

K. I. Baskakova, A. Okotrub, L. G. Bulusheva, O. Sedelnikova

3D printing is a promising technology for creating polymer objects of a given architecture with specified functional properties. In fact, the choice of filaments for 3D printing is quite limited. Here, we report a process for producing polystyrene filaments with 0.0025–2 wt.% single-walled carbon nanotubes (SWCNTs) by extruding crushed polystyrene composites. The resulting filaments are characterized by a high uniformity of filler distribution and the absence of air pores. Comparison of microscopy data and electromagnetic properties of base composites and composite materials printed from filaments showed that extrusion and printing improve SWCNT dispersion. The proposed method can be used to create filaments for 3D printing of objects from various base polymers containing functional fillers up to the electrical percolation threshold and above.

3D打印是一种很有前途的技术，可以创建具有特定功能特性的给定结构的聚合物物体。事实上，3D打印材料的选择非常有限。在这里，我们报告了一种通过挤压破碎的聚苯乙烯复合材料来生产含有0.0025-2 wt.%单壁碳纳米管(SWCNTs)的聚苯乙烯长丝的工艺。所得长丝的特点是填料分布均匀性高，没有气孔。基材复合材料和长丝印刷复合材料的显微镜数据和电磁性能比较表明，挤压和印刷提高了swcnts的分散性。所提出的方法可用于从含有功能填料的各种基础聚合物中创建用于3D打印对象的细丝，直至电渗透阈值及以上。

引用次数: 1

Industrial Manufacturing Applications of Zinc Oxide Nanomaterials: A Comprehensive Study 氧化锌纳米材料在工业制造中的应用研究

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-05 DOI: 10.3390/nanomanufacturing2040016

Md Abdus Subhan, Newton Neogi, K. Choudhury

Nanomaterials (NMs) that are created with zinc oxide are very valuable for a wide variety of applications. There is a present interest in ZnO nanoparticles in a wide range of industries. This interest may be attributed to the fact that ZnO NPs have many important features. It will be necessary for ZnO NPs to possess certain qualities in order for them to rapidly find uses in industry and for these applications to have an effect on the expansion of the economy. A large surface area, a large bandgap, photocatalytic property, biosensing, bioimaging, and other qualities are included in this list. In this article, the extraordinary characteristics of ZnO NPs, as well as their novel applications in industrial settings and the challenges that come along with their utilization, will be discussed.

用氧化锌制备的纳米材料(NMs)具有广泛的应用价值。目前，ZnO纳米颗粒在广泛的工业领域引起了人们的兴趣。这种兴趣可能归因于ZnO NPs具有许多重要的特征。ZnO纳米粒子必须具备一定的品质，才能迅速在工业中找到用途，并对经济的发展产生影响。大表面积，大带隙，光催化性能，生物传感，生物成像和其他品质都包括在这个列表中。在这篇文章中，将讨论ZnO纳米粒子的非凡特性，以及它们在工业环境中的新应用和它们的使用所带来的挑战。

引用次数: 13

Correction: Comparison of EUV Photomask Metrology Between CD-AFM and TEM 校正:CD-AFM与TEM的EUV光掩模计量比较

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-01 DOI: 10.1007/s41871-022-00165-3

G. Dai, K. Hahm, Lipfert Sebastian, M. Heidelmann

引用次数: 0

Correction: A Proposal of Hyperbolic Fitting Method by Applying the Properties of Functions for Plateau Surface Analysis in ISO 13565–3 修正:ISO 13565-3中应用函数性质进行高原表面分析的双曲拟合方法的建议

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-01 DOI: 10.1007/s41871-022-00167-1

R. Sakakibara, I. Yoshida, Yuki Kondo, M. Numada, Kenichi Yamashita

引用次数: 0

Correction: Ghost Imaging with Deep Learning for Position Mapping of Weakly Scattered Light Source 校正:基于深度学习的幽灵成像用于弱散射光源的位置映射

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-01 DOI: 10.1007/s41871-022-00160-8

Y. Mizutani, S. Kataoka, T. Uenohara, Y. Takaya

引用次数: 0

Correction: Additive Manufacturing of Metal Micro-ring and Tube by Laser-Assisted Electrophoretic Deposition with Laguerre–Gaussian Beam 修正:拉盖尔-高斯光束激光辅助电泳沉积金属微环和微管的增材制造

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-01 DOI: 10.1007/s41871-022-00163-5

K. Nakazawa, S. Ozawa, F. Iwata

引用次数: 0

Correction: Closed-Loop Control of an XYZ Micro-Stage and Designing of Mechanical Structure for Reduction in Motion Errors 修正:XYZ微工作台的闭环控制及减少运动误差的机械结构设计

Q1 Engineering

Nanomanufacturing and Metrology

Pub Date : 2022-12-01 DOI: 10.1007/s41871-022-00164-4

H. Matsukuma, K. Adachi, Takuma Sugawara, Y. Shimizu, Wei Gao, Eiji Niwa, Yoshihiro Sasaki

引用次数: 0

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