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| 1 | Design of novel RGO/2D strip-like ZIF-8/DMAOP ternary hybrid structure towards high-efficiency microwave absorption, active and passive anti-corrosion, and synergistic antibacterial performance显示文摘In order to meet the requirements of the marine environment for microwave absorption(MA)materials,we put forward the strategy of constructing multi-functional composite materials,which integrate microwave absorption,anti-corrosion,and antibacterial properties.Herein,graphene oxide(GO)was used as a template to induce the growth of zeolitic imidazolate framework-8(ZIF-8),simultaneously as a two-dimensional(2D)nanocontainers to load corrosion inhibitors to achieve pH-responsive and self-healing properties.Finally,quaternary ammonium salt(dimethyl octadecyl(3-trimethoxylsilyl propyl)ammonium chloride(DMAOP))and sodium ascorbate(VCNa)were introduced to achieve synergistic antibacterial activity and the reduction of GO.The 2D strip-like structure of ZIF-8 was due to the confined growth induced by the electrostatic attraction between ZIF-8 and GO sheets.The as-obtained reduced GO(RGO)/ZIF-8/DMAOP5 exhibited excellent microwave absorption(MA)properties,with a minimum reflection loss(RL)value of-47.08 dB at 12.73 GHz when the thickness was 2.8 mm.Moreover,the effective absorption bandwidth reached 6.84 GHz.After soaking in 3.5%NaCl solution for 35 days,the RGO/ZIF-8/DMAOP5-0.7%coating still achieved an impedance value of 4.585×107Ω·cm^(2) and a protective efficiency of 99.994%,providing superior anti-corrosion properties.In addition,fantastic antibacterial activity was obtained,with the antibacterial rates of RGO/ZIF-8/DMAOP_(10) reaching 99.39%and 100%against Escherichia coli and Staphylococcus aureus.This work could open new avenues towards the development of a new generation of multifunctional MA materials. | Tanlin Chen Yingrui Tian Zihao Guo Yao Chen Qing Qi Fanbin Meng | 2024 | Nano Research2024，17，3： | 0 |
| 2 | 中空磁性Fe_(3)O_(4)纳米球/MXene复合棉织物的制备及其电磁屏蔽性能显示文摘为优化导电织物对电磁波的阻抗匹配性,减少电磁波的二次污染,在棉织物中引入磁损耗材料中空Fe_(3)O_(4)纳米球,并通过层层组装的方法将其与过渡金属碳化物/氮化物(MXene)结合制备中空磁性Fe_(3)O_(4)纳米球/MXene复合棉织物,探究中空磁性Fe_(3)O_(4)纳米球对复合棉织物电磁屏蔽性能的影响规律和作用机制。借助超景深显微镜、扫描电子显微镜和矢量网络分析仪对中空磁性Fe_(3)O_(4)纳米球/MXene复合棉织物的形貌结构和电磁屏蔽性能进行表征与分析。结果表明:通过水热合成制备的Fe_(3)O_(4)具有中空球状形貌和尖晶石晶体结构,颗粒尺寸较为均匀,为(271.9±4.6)nm;随着Fe_(3)O_(4)/MXene负载循环次数的增加,复合棉织物的方阻逐渐减小,最低为(10.5±1.7)Ω/,并展现出较好的透气性;复合棉织物的电磁屏蔽性能也逐渐增强,最高电磁屏蔽效能可达(29.03±0.3)dB,且织物的屏蔽机制由吸收为主逐渐向反射为主转变,其优异的电磁屏蔽性能主要归因于MXene纳米片和中空磁性Fe_(3)O_(4)纳米球的协同作用。 | 郑贤宏 唐金好 李长龙 王炜 | 2023 | 纺织学报2023，44，11： | 0 |
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