Direct ink write 3D printing of high solids loading bimodal distributions of particles,AIChE Journal

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Direct ink write 3D printing of high solids loading bimodal distributions of particles
AIChE Journal ( IF 3.5 ) Pub Date : 2021-08-24 , DOI: 10.1002/aic.17412
Ian Campbell ₁ , Alexandra Marnot ₂ , Mitchell Ketcham ₁ , Carly Travis ₁ , Blair Brettmann _{1,

2}

Affiliation

As additive manufacturing (AM) expands as a processing technology for structurally customizable materials, there is increasing interest in printing with high particle contents. For suspensions with particle contents of over 50 vol%, there are significant formulation and processing challenges due to increased interparticle friction and suspension complexity. We focus on suspensions with bimodal particle distributions and two common binder systems, a high molecular weight polymer in a solvent that solidifies via solvent evaporation and a monomer mixture that cures via ultraviolet irradiation. We examine the interplay between formulation and processing and show that the formulation effects are particularly important at optimal printing parameters, but that they are overcome by processing-related defects at sub-optimal parameters. By understanding the processing and formulation effects specific to direct ink write AM of high solids suspensions, new customized inks can be designed for a wide range of applications, including construction, energetics, and ceramics.

中文翻译：

直接墨水写入 3D 打印高固体负载颗粒的双峰分布

随着增材制造 (AM) 作为结构可定制材料的加工技术的扩展，人们对高颗粒含量打印的兴趣越来越大。对于颗粒含量超过 50 vol% 的悬浮液，由于颗粒间摩擦和悬浮液复杂性增加，存在重大的配方和加工挑战。我们专注于具有双峰粒子分布和两种常见粘合剂系统的悬浮液，一种在溶剂中通过溶剂蒸发固化的高分子量聚合物和一种通过紫外线照射固化的单体混合物。我们检查了配方和加工之间的相互作用，并表明配方效果在最佳印刷参数下尤为重要，但在次优参数下与加工相关的缺陷可以克服它们。

更新日期：2021-08-24

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