Preparation of near-spherical PA12 particles for selective laser sintering via Plateau-Rayleigh instability of molten fibers
Preparation of near-spherical PA12 particles for selective laser sintering via Plateau-Rayleigh instability of molten fibers
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通过熔融纤维的高原-瑞利不稳定性制备用于选择性激光烧结的近球形 PA12 颗粒
DOI：
10.1016/j.matdes.2020.108578
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发表时间：
2020-05
影响因子：
8.4
通讯作者：
Li Guangxian
中科院分区：
文献类型：
--
作者：
Zhou Ying;Xi Shuting;Huang Yajiang;Kong Miqiu;Yang Qi;Li Guangxian
基于熔融聚酰胺12（PA 12）纤维的Plateau-Rayleigh不稳定性，提出了一种用于选择性激光烧结（SLS）技术的制备尺寸可控的近球形PA 12颗粒的新方法。在该方法中，首先通过熔融纺丝PA 12粒料来制备具有所需直径的PA 12纤维。然后，将短的PA 12纤维切断后分散并熔融在水溶性聚氧化乙烯（PEO）基体中。在随后的热处理过程中，熔融的PA 12纤维通过Plateau-Rayleigh不稳定性自发地崩解，然后通过用水溶解PEO基质释放所得的近球形颗粒。基于Tomotika模型的原位光学显微镜和动力学分析表明，颗粒的直径主要取决于纤维的直径，而转变动力学在很大程度上取决于热处理温度。两步热处理的利用可以有效地加速纤维到颗粒的转变动力学。所制备的粉末具有与商业粉末相似的优异流动性，这归因于其高球形度、光滑表面和窄粒度分布。量热分析结果表明，所制备的粉末具有较窄的熔点范围和较宽的烧结窗口。(C)2020年，任作家。出版社：Elsevier Ltd
We report a novel method to prepare near-spherical polyamide 12 (PA12) particles with controllable size for selective laser sintering (SLS) technology based on the Plateau-Rayleigh instability of molten PA12 fibers. In this method, PA12 fibers with desired diameters are first prepared by melt spinning of PA12 pellets. Then, short PA12 fibers after being cropped are dispersed and melted in the hydrosoluble polyethylene oxide (PEO) matrix. During the subsequent thermal treatment process, the molten PA12 fibers spontaneously disintegrate via Plateau-Rayleigh instability and the resultant near-spherical particles are then released by dissolving the PEO matrix with water. In-situ optical microscopy and kinetic analysis based on the Tomotika's model indicate that the diameter of particles is mainly determined by that of fibers while the transformation dynamics depend largely on the temperature of thermal treatment. The utilization of a two-step thermal treatment can effectively accelerate the fiber-to-particle transformation dynamics. The powder prepared has an excellent flowability similar to that of commercial powders due to its high degree of sphericity, smooth surface and narrow size distribution. Calorimetry results indicate that the powder prepared had a narrow melting range and wide sintering window. (C) 2020 The Authors. Published by Elsevier Ltd.
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影响因子：
8.4
作者：
Wang Gexia;Ping Wang;Zhichao Zhen;Wei Zhang;J. Ji
通讯作者：
Wang Gexia;Ping Wang;Zhichao Zhen;Wei Zhang;J. Ji
影响因子：
64.8
作者：
Kaufman, Joshua J.;Tao, Guangming;Abouraddy, Ayman F.
通讯作者：
Abouraddy, Ayman F.
影响因子：
5.2
作者：
Shahzad, Khuram;Deckers, Jan;Vleugels, Jef
通讯作者：
Vleugels, Jef
影响因子：
4.7
作者：
Dechet, Maximilian A.;Goblirsch, Anja;Schmidt, Jochen
通讯作者：
Schmidt, Jochen
DOI：
10.1002/pol.1980.180180619
发表时间：
1980-01-01
影响因子：
--
作者：
ISHIKAWA, T;NAGAI, S;KASAI, N
通讯作者：
KASAI, N