Abstract:

As one of the important 3D printing technologies, selective laser sintering (SLS) enables one can fabricate parts with desirable geometry shape that cannot be achieved by traditional polymer processing technologies, which is widely used in high-tech fields such as aerospace, defense equipment, medical apparatus and automobiles. In this paper, the processing principle and merits of SLS printing technology were introduced, and the type of materials used in SLS processing together with the preparation methods of polymer-based powder materials mainly including phase separation method, mechanical attrition method, solution-based method and spray drying method were reviewed and summarized. It was focused on the research progress of SLS printing technology towards fabrication of polymer-based piezoelectric composites and parts. Although the SLS printing technology faced the bottlenecks such as limited printable polymer materials, lack of functionality, high cost in the production of powder and only carried out to a small production, it would become an excellent manufacturing method in the field of multifunctional high-performance composite parts with large and complex geometry shape through further innovation and development.

Key words: 3D printing, selective laser sintering, polymer-based powder, piezoelectric composite, part

摘要：

选择性激光烧结（selective laser sintering, SLS）是一种重要的3D打印加工技术，可制备传统加工无法制备的任意复杂形状的制件，广泛应用于航空航天、国防装备、医疗器械以及汽车等高新技术领域。本文介绍了SLS技术的加工原理和优势，综述了SLS技术加工成形用材料种类及聚合物基粉体材料的制备方法，主要包括相分离法、机械粉碎法、溶液法和喷雾干燥法。重点对SLS技术制备聚合物基压电复合材料及制品的国内外研究现状进行总结。虽然SLS打印制造技术面临聚合物原料种类少、功能缺乏、粉体生产成本高以及难以批量制备等瓶颈问题，但经过不断地创新与发展，SLS打印技术将成为高性能多功能高分子复合材料及其大型复杂制件的极佳制造方法。

关键词: 3D打印, 选择性激光烧结, 聚合物基粉体, 压电复合材料, 制件