Advanced Powder Technology最新文献

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Measurement and calibration of bonding parameters for a multi-scale DEM model of corn ears: experiment and simulation alignment 玉米穗多尺度DEM模型粘接参数的测量与标定：实验与仿真对准

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-13 DOI: 10.1016/j.apt.2026.105175

Dandan Han , Tingyi Mo , Yunxia Wang , Chao Tang , Lin Chen , Lijia Xu

An innovative flexible corn ear Discrete Element Method (DEM) model was established to effectively capture hierarchical anatomical properties of the corncob. By embedding kernel apices within the interstitial voids of xylem annulus particles and establishing multi-point adhesive connections, the model facilitates detachable kernel mechanics and corncob fracture dynamics. Experimental quantification yielded circumferential and axial threshing forces of 19.24 N and 28.70 N for four kernels arranged in a 2 × 2 matrix pattern relative to the corncob. These measurements served as benchmark criteria for systematic bonding parameter calibration. Sequential application of optimization tests identified the optimal bonding parameter set governing kernel–corncob interactions. Model validation demonstrated simulated circumferential and axial threshing forces of 19.37 N and 28.83 N, yielding relative errors of 0.68 % and 0.42 %. Implementation of the calibrated ear DEM model for longitudinal axial flow threshing apparatus simulation successfully reproduced dynamic bond failure mechanisms between kernels and corncob, axial kernel distribution patterns within the cylinder, and the inverse correlation between unthreshed rate and cylinder rotational velocity. The developed flexible ear DEM model substantially advances simulation authenticity and accuracy for threshing processes, furnishing a robust computational platform and theoretical basis for investigating low-loss, high-efficiency threshing separation mechanisms.

建立了一种新颖的柔性玉米穗离散元法（DEM）模型，有效地捕捉了玉米穗轴的层次解剖特性。该模型通过将核尖嵌入木质部环颗粒的间隙空隙中，建立多点黏附连接，实现了核可分离力学和玉米芯断裂动力学。实验量化得到4粒玉米相对于玉米芯呈2 × 2矩阵排列时，圆周脱粒力为19.24 N，轴向脱粒力为28.70 N。这些测量结果作为系统键合参数校准的基准标准。优化试验的连续应用确定了控制玉米粒-玉米芯相互作用的最佳键合参数集。模型验证表明，模拟的周向和轴向脱粒力分别为19.37 N和28.83 N，相对误差分别为0.68%和0.42%。在纵向轴流脱粒装置模拟中，利用标定后的穗部DEM模型成功再现了玉米粒与玉米芯之间的动态粘结破坏机制、筒内轴向籽粒分布模式以及脱粒率与筒内转速的负相关关系。所开发的柔性脱粒DEM模型大大提高了脱粒过程仿真的真实性和准确性，为研究低损失、高效率脱粒分离机制提供了强大的计算平台和理论基础。

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引用次数: 0

Neutron irradiation-enhanced orange-red emission in double perovskite phosphors for harsh radiation environments 中子辐照增强双钙钛矿荧光粉在恶劣辐射环境中的橙红色发射

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-12 DOI: 10.1016/j.apt.2026.105173

Noor Zamin Khan , Zhe Qin , Sayed Ali Khan , Anqi Lin , Zhuan Zhao , Muhammad Amin Padhiar , Zakir Ullah , Sonehra Anjum , Shimao Wang , Gang Meng

In this study, double perovskite

{C a}_{2} L u T a O_{6} : {S m}^{3 +}

oxide phosphors were subjected to 14 MeV neutron irradiation with a total fluence of 1 × 10¹³n/cm² to evaluate their performance for space applications. A detailed investigation of photoluminescence (PL), crystal structure, X-ray photoelectron spectroscopy (XPS), and surface morphology for pre- and post-exposure to neutron irradiation. The PL results demonstrated that neutron-irradiated samples exhibit a significantly higher luminescence intensity compared to their non-irradiated counterparts. Notably, the sample with an

0.05 {S m}^{3 +}

doping concentration showed over 15% increase in luminescence intensity for the orange-red emission, peaking at 603 nm under 407 nm excitation, following irradiation. This observation challenges the conventional belief that high-energy radiation invariably degrades optical properties. Our results reveal that neutron irradiation induces beneficial defects, such as oxygen vacancies and lattice distortions, which effectively suppress non-radiative recombination and enhance

{S m}^{3 +}

emission. Furthermore, the

{C a}_{2} L u T a O_{6} : {S m}^{3 +}

samples exhibit remarkable durability under neutron irradiation. The optical and structural characteristics indicate that

{S m}^{3 +}

-doped

{C a}_{2} L u T a O_{6}

is a promising orange-red phosphorescent material for applications in harsh radiative environments.

本研究对双钙钛矿Ca2LuTaO6:Sm3+氧化物荧光粉进行了14 MeV中子辐照，总辐照量为1 × 1013n/cm2，以评估其空间应用性能。详细研究了中子辐照前后的光致发光（PL）、晶体结构、x射线光电子能谱（XPS）和表面形貌。PL结果表明，中子辐照样品的发光强度明显高于未辐照样品。值得注意的是，当掺杂浓度为0.05Sm3+时，样品在407 nm激发下的橘红色发光强度增加了15%以上，在603 nm处达到峰值。这一观察结果挑战了高能辐射必然会降低光学性能的传统观念。结果表明，中子辐照可诱导氧空位和晶格畸变等有利缺陷，有效抑制非辐射复合，增强Sm3+发射。此外，Ca2LuTaO6:Sm3+样品在中子辐照下表现出显著的耐久性。光学和结构特性表明，Sm3+掺杂的Ca2LuTaO6是一种很有前途的在恶劣辐射环境下应用的橘红色磷光材料。

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引用次数: 0

Continuous droplet freezing enables stable powder formulation of extracellular vesicles for therapeutic applications 连续液滴冷冻使细胞外囊泡的稳定粉末配方用于治疗应用

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-09 DOI: 10.1016/j.apt.2026.105174

Tatsuya Fukuta , Masato Miyazaki , Kotone Yoshimura , Rikuto Ihara , Haruhiko Nakamura , Haruka Mogami , Wuxuan Liu , Mayumi Ikeda-Imafuku , Satoshi Kodama , Ko Matsui , Taiki Fujimoto , Kenjirou Higashi , Kazunori Kadota

Extracellular vesicles (EVs) hold great promise as a novel therapeutic modality. While their use as certain formulations has been actively explored, the development of lyophilized EV formulations is essential for ensuring long-term stability and facilitating the clinical translation. However, conventional lyophilization methods often lead to nanoparticle aggregation upon reconstitution, which compromises formulation quality. Herein, we explored a continuous droplet freezing (CDF) approach using a precision droplet generation system, followed by lyophilization, to prepare spherical powder particles containing bovine milk-derived EVs (mEVs). A formulation composed of 0.01 wt% mEVs and 10% trehalose was processed using this CDF approach, followed by drum-type drying. The CDF-based process produced particles with smoother surfaces, higher sphericity, larger Brunauer-Emmett-Teller surface areas, and a lower angle of repose compared to classical tray-type freeze-drying. Notably, the CDF particles retained an amorphous state for over six months at 4°C, whereas the tray-dried particles exhibited crystallinity. The CDF-dried powders showed excellent flowability and redispersibility, with a more monodisperse size distribution upon reconstitution. Furthermore, cellular uptake of mEVs from the CDF powder was comparable to that of untreated mEVs. These findings demonstrate that CDF followed by drum-type lyophilization is a promising technique for producing stable and functional EV powder formulations.

细胞外囊泡（EVs）作为一种新的治疗方式具有很大的前景。虽然它们作为某些制剂的使用已被积极探索，但冻干EV制剂的开发对于确保长期稳定性和促进临床转化至关重要。然而，传统的冻干方法往往会导致纳米颗粒在重构时聚集，从而影响配方质量。在此，我们探索了一种连续液滴冷冻（CDF）方法，使用精密液滴生成系统，然后进行冻干，以制备含有牛奶衍生ev （mev）的球形粉末颗粒。使用CDF方法处理由0.01 wt% mev和10%海藻糖组成的配方，然后进行鼓式干燥。与传统的托盘式冷冻干燥相比，基于cdf的工艺产生的颗粒表面更光滑，球形度更高，布鲁诺尔-埃米特-泰勒表面积更大，休止角更小。值得注意的是，CDF颗粒在4°C下保持无定形状态超过6个月，而托盘干燥的颗粒则表现出结晶性。cdf干粉具有良好的流动性和再分散性，重组后粒径分布更加单分散。此外，CDF粉末中mev的细胞摄取与未处理的mev相当。这些发现表明，CDF - drum-type冻干是一种很有前途的生产稳定和功能性EV粉末配方的技术。

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引用次数: 0

Internal geometry optimization of a vacuum rotary kiln for enhanced low-temperature drying of pharmaceutical solids 真空回转窑的内部几何结构优化，以提高低温干燥药物固体

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-06 DOI: 10.1016/j.apt.2025.105162

Yuka Fukushima , Toshiki Nakamura , Fumihiko Kato , Shizuki Ohshima , Motoharu Suzuki , Kohei Tahara

Low-temperature drying is a critical step for ensuring the product quality and long-term stability of pharmaceutical solids such as granules and tablets. Vacuum rotary kilns have a wide range of industrial applications and are potentially applicable to the low-temperature drying of pharmaceutical solids. In this study, a vacuum rotary kiln was modified by the utilization of a hot-water circulation unit to improve the heat transfer efficiency and addition of internal structural components to the rotating cylinder to improve the powder flow characteristics. Experiments demonstrated that these components promoted the ideal cascading motion, which increased contact between the granules and heated cylinder wall and improved mixing uniformity throughout the powder bed. Numerical simulations were conducted to visualize particle trajectories and contact areas and quantify mixing indices. Among the internal structural components tested, flights with an axial gradient and high contact frequency with the powder bed as well as metal liners with high porosity enhanced the drying efficiency by reducing the drying time and minimizing localized overheating. These results demonstrate the potential applicability of vacuum rotary kilns to the low-temperature drying process of pharmaceutical solids by optimizing their internal geometry.

低温干燥是保证颗粒、片剂等药用固体产品质量和长期稳定性的关键步骤。真空回转窑具有广泛的工业应用，在医药固体的低温干燥中具有潜在的应用前景。本研究利用热水循环装置对真空回转窑进行了改造，提高了传热效率，并在旋转筒体上增加了内部结构部件，改善了粉体流动特性。实验表明，这些成分促进了理想的级联运动，增加了颗粒与加热圆筒壁的接触，提高了整个粉床的混合均匀性。数值模拟显示了颗粒轨迹和接触面积，量化了混合指数。在测试的内部结构部件中，轴向梯度高接触频率的飞片和高孔隙率的金属衬垫通过缩短干燥时间和减少局部过热来提高干燥效率。这些结果表明，通过优化真空回转窑的内部结构，真空回转窑在制药固体的低温干燥过程中具有潜在的适用性。

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引用次数: 0

CFD-DEM investigation of binary particle flow and wear characteristics in a centrifugal pump 离心泵内二元颗粒流动及磨损特性的CFD-DEM研究

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-06 DOI: 10.1016/j.apt.2025.105163

Zhenjiang Zhao , Guoliang Wang , Weidong Liang , Weiwei Zhang , Ling Bai , Ling Zhou

Solid-liquid two-phase pumps often handle particles of different sizes, but their distinct motion characteristics limit the reliability of pump operation. In this study, Computational Fluid Dynamics–Discrete Element Method (CFD − DEM) was employed to establish a polydisperse particle system model containing 0.5 mm fine particles and 2.0 mm coarse particles. The particle flow characteristics, dynamic behavior, and wear mechanisms inside the pump were systematically investigated under five different mixing ratios. The reliability of the numerical simulation was verified through high-speed photography experiments and elbow erosion experiments. Particle trajectory analysis reveals distinct dynamic behaviors: coarse particles follow complex paths with long residence times, while fine particles demonstrate strong fluid-following ability but tend to recirculate near the volute tongue. Collision frequency and energy dissipation analysis indicate that coarse particles dominate the dissipation process, with the shear work on the volute surface exceeding that of other components by about one order of magnitude. The wear severity of the components ranks as volute > blades > hub > shroud, and the wear regions show clear spatial migration as the proportion of coarse particles increases. When the coarse particle fraction increases to 2:1, the buffering effect of the particle layer slows the wear rate. The particle size effects and wear mechanisms revealed in this study provide important insights for advancing powder transport technology.

固液两相泵通常处理不同大小的颗粒，但其独特的运动特性限制了泵运行的可靠性。本研究采用计算流体力学-离散元法（CFD - DEM）建立了包含0.5 mm细颗粒和2.0 mm粗颗粒的多分散颗粒系统模型。系统研究了5种不同混合比下泵内颗粒的流动特性、动力学行为和磨损机理。通过高速摄影实验和弯管冲蚀实验验证了数值模拟的可靠性。颗粒轨迹分析显示了不同的动力学行为：粗颗粒路径复杂，停留时间长；细颗粒随流能力强，但在蜗壳舌附近倾向于再循环。碰撞频率和能量耗散分析表明，粗颗粒在耗散过程中占主导地位，其在蜗壳表面的剪切功超过其他部件约一个数量级。各部件的磨损程度依次为蜗壳>；叶片>；轮毂>；叶冠，磨损区域随着粗颗粒比例的增加呈现明显的空间迁移。当粗颗粒分数增加到2:1时，颗粒层的缓冲作用减缓了磨损速率。本研究揭示的颗粒尺寸效应和磨损机制为推进粉末输送技术提供了重要的见解。

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引用次数: 0

Synergistic effect of Copper(II) ions on the adsorption of ricinoleic acid on the cassiterite surface 铜（II）离子对蓖麻油酸在锡石表面吸附的协同效应

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-06 DOI: 10.1016/j.apt.2025.105164

Lingpan Du , Jiangli Li , Menglai Wang , Ciyun Chen , Qinbo Cao , Haiyun Xie , Peilun Shen , Dianwen Liu

The flotation of fine cassiterite (SnO₂) particles requires efficient collectors. Here, ricinoleic acid (RA) and Cu²⁺ were employed to efficiently float SnO₂. The flotation capacity of this method was studied by using flotation tests, surface examinations, and density functional theory (DFT) calculations. The flotation results imply that the flotation capacity of RA was greater than that of oleic acid at pH 7, which was caused mainly by the greater solubility of RA. The Cu²⁺ conditioning further improved the flotation capacity of RA at pH 7. Cu(RA)₂ was produced on the SnO₂ surface. The intermolecular hydrogen bonds between the RA species led to a tighter assembly of Cu(RA)₂.

The reaction of Cu²⁺ cations with the SnO₂ (110) surface produced a Cu-rich surface, assisting in adsorption of RA. The –COO group of RA bonded with two Cu atoms, generating a bidentate binding structure. The effective hybridization among the O 2p orbitals of the –COO group and Cu orbitals accounted for the strong interaction between the RA collector and the SnO₂ surface. This work extends our knowledge about the role of Cu²⁺ during SnO₂ flotation with an RA collector.

细粒锡石（SnO2）的浮选需要高效捕收剂。在这里，蓖麻油酸（RA）和Cu2+被用来有效地浮浮氧化锡。通过浮选试验、表面检测和密度泛函理论（DFT）计算，研究了该方法的浮选性能。浮选结果表明，在pH为7时，RA的浮选能力大于油酸，这主要是由于RA的溶解度较大所致。在pH为7的条件下，Cu2+处理进一步提高了RA的浮选性能。在SnO2表面制备了Cu(RA)2。RA物种之间的分子间氢键导致Cu(RA)2的组装更紧密。Cu2+阳离子与SnO2（110）表面反应生成富cu表面，有利于RA的吸附。RA的-COO基团与两个Cu原子成键，形成双齿结合结构。-COO基o2p轨道与Cu轨道之间的有效杂化是RA捕收剂与SnO2表面强相互作用的原因。这项工作扩展了我们对Cu2+在RA捕收剂浮选SnO2中的作用的认识。

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引用次数: 0

Inside Front Cover (Aims & Scope, Editors) 内页封面（Aims & Scope，编辑）

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-01 DOI: 10.1016/S0921-8831(26)00003-8

引用次数: 0

2025 Reviewer Appreciation 2025审稿人致谢

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.apt.2025.105149

引用次数: 0

Full title (Editorial Board Members) 全称（编委成员）

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2026-01-01 DOI: 10.1016/S0921-8831(26)00004-X

引用次数: 0

Effect of counterpart material on glass particle morphology in binary component attrition milling evaluated by experiment and DEM simulation 通过实验和DEM模拟评价了双组份磨粒铣削过程中对应材料对玻璃颗粒形貌的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-31 DOI: 10.1016/j.apt.2025.105150

Chiharu Tokoro , Yuki Murata , Yutaro Takaya , Hidehiro Kamiya , Kohei Komori , O Shourin

This study investigated the fragmentation of glass particles in binary mixtures with alumina, steel, and lead during attrition milling. The fragmentation kinetics, particle size distributions, and fragment morphologies were evaluated experimentally, and kinetic parameters were extracted using a population balance model. Discrete element method simulations clarified the dynamic interactions governing the material-dependent fragmentation. The results indicated that the mechanical properties of the counterpart materials strongly affected the collision intensity and fragment morphology. Alumina induces frequent high-energy collisions and efficient size reduction, producing irregular angular fragments. When lead was used, glass exhibited minimal fragmentation because the collision energy dissipated through plastic deformation during prolonged contact. Steel exhibited moderate fragmentation and generates fragments with low aspect ratios and high circularities suitable for recycling applications. The integration of experiments and simulations elucidated selective comminution mechanisms in heterogeneous systems and demonstrated that fragmentation efficiency and particle morphology can be tuned by the choice of counterpart material.

本研究考察了氧化铝、钢和铅二元混合物中玻璃颗粒在磨粒过程中的破碎情况。实验评估了破碎动力学、粒径分布和碎片形态，并利用种群平衡模型提取了动力学参数。离散元法模拟阐明了控制材料相关破碎的动态相互作用。结果表明，对应材料的力学性能对碰撞强度和碎片形貌有很大影响。氧化铝引起频繁的高能碰撞和有效的尺寸减小，产生不规则的角碎片。当使用铅时，玻璃表现出最小的碎片，因为碰撞能量在长时间接触期间通过塑性变形消散。钢表现出适度的破碎，产生的碎片具有低宽高比和高圆度，适合回收利用。实验和模拟的结合阐明了非均相系统中的选择性粉碎机制，并表明可以通过选择对应材料来调节破碎效率和颗粒形态。

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