Bioinspired by staggered cellular structures:3D-printed aerogel frameworks for ink rheological,parametric optimization,and enhanced terahertz electromagnetic shielding performanceOA
With the rapid development of terahertz(THz)technology in ultra-high-speed communication and security inspection applications,there is a growing demand for highperformance THz shielding and absorbing materials to prevent electromagnetic interference(EMI)or pollution.Natural hierarchical staggered cellular structures,such as bones and wood,feature abundant micropores/channels and interlocking staggered layered architectures.The architectural feature promotes multi-reflection and absorption of electromagnetic waves,prolonging their propagation path and strengthening wave attenuation.Inspired by this,a bioinspired strategy was proposed to fabricate multilayer-MXene(m-Ti_(3)C_(2)T_(x))/cellulose nanofibrils(CNFs)aerogel frameworks with staggered stacking architectures via direct ink writing(DIW)three-dimensional(3D)printing technology for enhanced THz shielding and absorption performance.Through comprehensive optimization,we achieved composite inks with outstanding rheological properties and identified optimal printing parameters,enabling highprecision and stable 3D printing fabrication.The framework exhibits an excellent maximum reflection loss(RL)of 54.01 dB in the 0.5-3.0 THz range(100%qualified bandwidth)and a high absorption of 99.40%.It realizes a high green shielding index(g_(s)),the range of g_(s)>9 that meets the standard for excellent green EMI shielding up to 2.5 THz.Meanwhile,it demonstrates high shielding effectiveness(SE)exceeding 40 dB across a broad gigahertz(GHz)frequency range from 3.9 to 18 GHz,particularly reaching an excellent 101.84 dB in the Ku band.This work provides a simple and efficient way to achieve outstanding THz shielding and absorption performance.
Lei Chen;Sheng-Can Yang;Qi Liu;Jia-Qi Lang;Ming-Guo Ma
Research Center of Biomass Clean Utilization,MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy,Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,ChinaResearch Center of Biomass Clean Utilization,MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy,Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,ChinaResearch Center of Biomass Clean Utilization,MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy,Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,ChinaResearch Center of Biomass Clean Utilization,MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy,Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,ChinaResearch Center of Biomass Clean Utilization,MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy,Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University,Beijing 100083,China
信息技术与安全科学
three-dimensional(3D)printingterahertz electromagnetic interference shieldingMXenerheological propertiesstaggered stacking structure
《Nano Research》 2026 (2)
P.512-526,15
support from the National Natural Science Foundation of China(No.22478036)Beijing Nova Program(No.20230484431)is gratefully acknowledged.
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