Core-shell structured PEDOT:PSS/SA@MXene composite fibers with microwave absorption performance
The booming development of the 5G era has facilitated the rapid growth of electronic information technology,providing efficiency and convenience,but inevitably giving rise to electromagnetic pollution,which poses irreversible harms to human health and the environment.To address this issue,microwave absorption materials(MAMs)have been developed and utilized.In civilian applications,MAMs are commonly used as patches in mobile devices and computers to prevent interference and minimize the electromagnetic radiation leakage.In military contexts,stealth technology enhances the survivability and defensive capabilities of weapons,providing a strategic advantage in modern warfare.Thus,MAMs play a crucial role in both military stealth operations and civilian protection.Traditional MAMs,such as ferrites,conductive carbon black,and magnetic metals,are typically incorporated into polymer matrices as powder fillers.However,they suffer from various drawbacks,including poor mechanical properties,inability to function as load-bearing components,high density hindering integration,and limited flexibility to meet the demands of modern electronics.One-dimensional fiber materials offer promising alternatives due to their lightweight,flexibility,and design versatility.However,most microwave absorbing fibers are produced by using methods such as chemical plating,coating,and impregnation.To address these challenges,this paper focuses on integrating modern textile techniques to produce flexible composite fibers with superior mechanical properties and exceptional absorption capabilities.The PEDOT:PSS/sodium alginate@MXene(PA@M)composite fibers with core-shell structure were success-fully fabricated by coaxial wet spinning process,to realize the integration of strong and efficient Microwave-absorbing functions.This paper mainly explored the effects of Ti3C2Tx MXene content on the morphology,mechanical properties,electrical conductivity and electromagnetic characteristics of the PA@M composite fibers.The results showed that because of the interactions between the MXene layers in the core and the PA components in the shell,the PA@M composite fibers exhibited remarkable mechanical properties,with a single-fiber breaking strength reaching(63.13±2.56)MPa and a corresponding elongation at break of(23.28±1.67)％.Furthermore,the conductivity of PA@M composite fibers was increased from 0.71 S/m to 3.42 S/m due to the efficient electron transfer between MXene nanolayers.Meanwhile,the component modulation and microstructure design could effectively regulate the electromagnetic properties of the PA@M composite fibers,so that PA@M-1.0 composite fibers achieved the minimum reflection loss of-63.39 dB and effective absorption bandwidth of 3.20 GHz.This research presents a novel and efficient approach for the design and development of microwave absorption fibers.
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维普
