ARC Centre of Excellence for Electromaterials Science (ACES), AIIM Facility, Innovation Campus , University of Wollongong , Wollongong , NSW 2500 , Australia.
ACS Appl Mater Interfaces. 2019 Jan 30;11(4):4353-4363. doi: 10.1021/acsami.8b18232. Epub 2019 Jan 17.
A relative lack of printable materials with tailored functional properties limits the applicability of three-dimensional (3D) printing. In this work, a diamond-acrylonitrile butadiene styrene (ABS) composite filament for use in 3D printing was created through incorporation of high-pressure and high-temperature (HPHT) synthetic microdiamonds as a filler. Homogenously distributed diamond composite filaments, containing either 37.5 or 60 wt % microdiamonds, were formed through preblending the diamond powder with ABS, followed by subsequent multiple fiber extrusions. The thermal conductivity of the ABS base material increased from 0.17 to 0.94 W/(m·K), more than five-fold following incorporation of the microdiamonds. The elastic modulus for the 60 wt % microdiamond containing composite material increased by 41.9% with respect to pure ABS, from 1050 to 1490 MPa. The hydrophilicity also increased by 32%. A low-cost fused deposition modeling printer was customized to handle the highly abrasive composite filament by replacing the conventional (stainless-steel) filament feeding gear with a harder titanium gear. To demonstrate improved thermal performance of 3D printed devices using the new composite filament, a number of composite heat sinks were printed and characterized. Heat dissipation measurements demonstrated that 3D printed heat sinks containing 60 wt % diamond increased the thermal dissipation by 42%.
相对缺乏具有定制功能特性的可打印材料限制了三维（3D）打印的适用性。在这项工作中，通过将高压高温（HPHT）合成微金刚石作为填料加入丙烯腈丁二烯苯乙烯（ABS）复合材料中，制备了用于 3D 打印的金刚石-ABS 复合丝。通过将金刚石粉末与 ABS 预混合，然后进行多次纤维挤出，形成了均匀分布的金刚石复合丝，其中含有 37.5 或 60wt%的微金刚石。在加入微金刚石后，ABS 基体材料的导热系数从 0.17 增加到 0.94 W/（m·K），增加了五倍多。含有 60wt%微金刚石的复合材料的弹性模量相对于纯 ABS 增加了 41.9%，从 1050 增加到 1490 MPa。亲水性也增加了 32%。通过用更硬的钛齿轮代替传统的（不锈钢）送丝齿轮，对低成本的熔丝制造（FFF）打印机进行了定制，以处理高磨损性的复合丝。为了展示使用新型复合丝的 3D 打印器件的改进的热性能，打印并表征了多个复合散热器。散热测量表明，含有 60wt%金刚石的 3D 打印散热器的散热性能提高了 42%。
