Ciobanu Romeo Cristian, Aradoaei Mihaela, Ursan George Andrei
Department of Electrical Measurements and Materials, Gheorghe Asachi Technical University, Boulevard D. Mangeron 71, 700050 Iasi, Romania.
Polymers (Basel). 2024 Dec 15;16(24):3496. doi: 10.3390/polym16243496.
This study investigated the creation of nano-composites using recycled LDPE and added 7.5 wt% nanofillers of Al and Fe in two varying particle sizes to be used as hot-melt adhesives for reversible bonding processes with the use of microwave technology. Reversible bonding relates to circular economy enhancement practices, like repair, refurbishment, replacement, or renovation. The physical-chemical, mechanical, and dielectric characteristics were considered to determine the impact of particle size and metal type. Through the investigation of electromagnetic radiation absorption in the composites, it was discovered that the optimal bonding technique could potentially involve a frequency of 915 MHz and a power level of 850 × 10 W/kg, resulting in an efficient process lasting 0.5 min. It was ultimately proven that the newly created hot-melt adhesive formulas can be entirely recycled and repurposed for similar bonding needs.
本研究探讨了使用回收的低密度聚乙烯（LDPE）制备纳米复合材料，并添加7.5重量%两种不同粒径的铝和铁纳米填料，以用作采用微波技术的可逆粘结工艺的热熔粘合剂。可逆粘结涉及循环经济强化实践，如修复、翻新、更换或更新。考虑了物理化学、机械和介电特性，以确定粒径和金属类型的影响。通过对复合材料中电磁辐射吸收的研究，发现最佳粘结技术可能涉及915兆赫的频率和850×10瓦/千克的功率水平，从而实现持续0.5分钟的高效工艺。最终证明，新制备的热熔粘合剂配方可完全回收并重新用于类似的粘结需求。
