Yun Sang-Seok, Yoon Wanjun, Jang Keon-Soo
Department of Polymer Engineering, School of Chemical and Materials Engineering, The University of Suwon, Hwaseong-si 18323, Republic of Korea.
CS Innovation Co., Hwaseong-si 18559, Republic of Korea.
Polymers (Basel). 2024 Sep 27;16(19):2737. doi: 10.3390/polym16192737.
The increasing environmental concerns and stringent regulations targeting emissions and energy efficiency necessitate innovative material solutions that not only comply with these standards but also enhance performance and sustainability. This study investigates the potential of heterojunction bilayer composites comprising stainless steel (SUS) and polyamide 66 (PA66), aiming to improve fuel efficiency and reduce harmful emissions by achieving lightweight materials. Joining a polymer to SUS is challenging due to the differing physical and chemical properties of each material. To address this, various surface treatment techniques such as blasting, plasma, annealing, and etching were systematically studied to determine their effects on the microstructural, chemical, and mechanical properties of the SUS surface, thereby identifying mechanisms that improve adhesion. Chemical etching using HNO/HCl and CuSO/HCl increased surface roughness and mechanical properties, but these properties decreased after annealing. In contrast, KFe(CN)/NaOH treatment increased the lap shear strength after annealing. Blasting increased surface roughness and toughness with increasing spray pressure and further enhanced these properties after annealing. Contact angle measurements indicated that the hydrophilicity of the SUS surface improved with surface treatment and further improved due to microstructure formation after annealing. This study demonstrates that customized surface treatments can significantly enhance the interfacial adhesion and mechanical properties of SUS/polymer heterojunction bilayer composites, and further research is recommended to explore the long-term stability and durability of these treatments under various environmental conditions.
日益增长的环境问题以及针对排放和能源效率的严格法规，使得创新材料解决方案成为必要，这些解决方案不仅要符合这些标准，还要提高性能和可持续性。本研究调查了由不锈钢（SUS）和聚酰胺66（PA66）组成的异质结双层复合材料的潜力，旨在通过实现轻量化材料来提高燃油效率并减少有害排放。由于每种材料的物理和化学性质不同，将聚合物与SUS连接具有挑战性。为了解决这个问题，系统地研究了各种表面处理技术，如喷砂、等离子体处理、退火和蚀刻，以确定它们对SUS表面的微观结构、化学和机械性能的影响，从而确定改善附着力的机制。使用HNO/HCl和CuSO/HCl进行化学蚀刻可增加表面粗糙度和机械性能，但退火后这些性能会下降。相比之下，KFe(CN)/NaOH处理在退火后增加了搭接剪切强度。喷砂随着喷雾压力的增加而增加表面粗糙度和韧性，退火后进一步增强了这些性能。接触角测量表明，SUS表面的亲水性随着表面处理而改善，并且由于退火后微观结构的形成而进一步改善。本研究表明，定制的表面处理可以显著提高SUS/聚合物异质结双层复合材料的界面附着力和机械性能，建议进一步研究探索这些处理在各种环境条件下的长期稳定性和耐久性。
