AI 中文总结
该研究提出选择性加速激光微纳结构化策略，通过优化激光技术提升模具嵌件纹理加工效率，实现功能性聚合物表面的可扩展制造，其抗菌、力学等性能优异，可衔接实验室与工业生产。
AI 中文摘要
医疗、包装和消费类应用中越来越需要具有定制润湿性、抗菌性和粘附性能的功能性聚合物表面。对钢制模具嵌件进行激光结构化后再进行注塑成型，提供了一种可扩展的制造途径，但传统的单光束纹理加工的吞吐量有限。在此，我们提出了一种选择性加速策略，将不同的激光技术应用于微结构化和纳米结构化。通过以1 MHz重复频率的单光束模式操作超短脉冲光纤激光器，微孔钻孔的速度提高了20倍。对于激光诱导周期性表面结构（LIPSS），利用空间光调制器进行的线光束整形将生产率提高了35倍，达到了超过100 cm²/min的处理速度，同时保持了亚微米级的保真度。使用聚丙烯（PP）、聚酰胺66（PA66）和丙烯腈-丁二烯-苯乙烯共聚物（ABS）进行的复制实验证实，微结构和纳米结构成功转移，其中PP的保真度最高。真空辅助注塑成型使复制特征的高度提高了56%至283%。所有激光纹理化的PP表面的静态水接触角均高于未处理的对照样品，在Wenzel状态下达到约134°。结构化的PA66表面使大肠杆菌的细菌滞留减少了多达99.8%，使金黄色葡萄球菌的细菌滞留减少了约90%。激光纹理化还使采用未优化粘合剂粘合的PP接头的剪切强度提高了多达30倍。该方法提供了一种实用的无涂层功能性聚合物组件制造途径，有助于弥合实验室激光纹理化与工业注塑成型之间的差距。
英文摘要
Functional polymer surfaces with tailored wettability, antibacterial and adhesion properties are increasingly required in medical, packaging and consumer applications. Laser structuring of steel mould inserts followed by injection moulding offers a scalable manufacturing route, but conventional single-beam texturing has limited throughput. Here, we present a selective acceleration strategy that applies different laser techniques to micro- and nanostructuring. Deep microhole drilling was accelerated up to 20-fold by operating an ultrashort-pulse fibre laser at a repetition rate of 1 MHz in single-beam mode. For laser-induced periodic surface structures (LIPSS), line-beam shaping with a spatial light modulator increased productivity by 35-fold, reaching processing speeds above 100 cm$^2$ min$^{-1}$ while retaining sub-micrometre fidelity. Replication experiments with polypropylene (PP), PA66 and ABS confirmed successful transfer of micro- and nanostructures, with PP showing the highest fidelity. Vacuum-assisted injection moulding increased replicated feature height by 56--283 percent. All laser-textured PP surfaces showed higher static water contact angles than the untreated reference, reaching approximately $134^\circ$ in the Wenzel regime. Structured PA66 surfaces reduced bacterial retention by up to 99.8 percent for E. coli and approximately 90 percent for S. aureus. Laser texturing also increased the shear strength of PP joints bonded with a non-optimised adhesive by up to 30-fold. This approach provides a practical, coating-free route to functional polymer components and helps bridge the gap between laboratory laser texturing and industrial injection moulding.
Comments20 pages, 7 figures
