School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300350, China.
Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300350, China.
ACS Nano. 2017 Jul 25;11(7):6860-6867. doi: 10.1021/acsnano.7b01987. Epub 2017 Jun 21.
An automated metal powder three-dimensional (3D) printing method for in situ synthesis of free-standing 3D graphene foams (GFs) was successfully modeled by manually placing a mixture of Ni and sucrose onto a platform and then using a commercial CO laser to convert the Ni/sucrose mixture into 3D GFs. The sucrose acted as the solid carbon source for graphene, and the sintered Ni metal acted as the catalyst and template for graphene growth. This simple and efficient method combines powder metallurgy templating with 3D printing techniques and enables direct in situ 3D printing of GFs with no high-temperature furnace or lengthy growth process required. The 3D printed GFs show high-porosity (∼99.3%), low-density (∼0.015g cm), high-quality, and multilayered graphene features. The GFs have an electrical conductivity of ∼8.7 S cm, a remarkable storage modulus of ∼11 kPa, and a high damping capacity of ∼0.06. These excellent physical properties of 3D printed GFs indicate potential applications in fields requiring rapid design and manufacturing of 3D carbon materials, for example, energy storage devices, damping materials, and sound absorption.
一种自动化金属粉末三维（3D）打印方法，用于原位合成独立式 3D 石墨烯泡沫（GFs），通过手动将镍和蔗糖混合物放置在平台上，并使用商用 CO 激光将 Ni/蔗糖混合物转化为 3D GFs，成功地进行了建模。蔗糖作为石墨烯的固态碳源，烧结后的镍金属作为石墨烯生长的催化剂和模板。这种简单高效的方法结合了粉末冶金模板和 3D 打印技术，能够直接进行 GFs 的原位 3D 打印，无需高温炉或冗长的生长过程。3D 打印的 GFs 具有高孔隙率（99.3%）、低密度（0.015g cm）、高质量和多层石墨烯的特点。GFs 的电导率约为 8.7 S cm，储能模量约为 11 kPa，阻尼能力约为 0.06。3D 打印 GFs 的这些优异物理性能表明，它们在需要快速设计和制造 3D 碳材料的领域具有潜在应用，例如储能器件、阻尼材料和吸声材料。
