咪唑聚氨酯接枝 MXene 和羟基化碳纳米管的高韧性和电磁屏蔽聚乳酸/聚己内酯复合材料

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-02-08 DOI:10.1016/j.polymer.2025.128143

Yifei Gao, Xiangyu Ma, Mengjiao Zhang, Pei Xu, Yunsheng Ding

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Highly tough and electromagnetic shielding poly(lactic acid)/polycaprolactone composites by imidazolium polyurethane grafted MXene and hydroxylated carbon nanotubes

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Highly tough and electromagnetic shielding poly(lactic acid)/polycaprolactone composites by imidazolium polyurethane grafted MXene and hydroxylated carbon nanotubes

Polylactic acid (PLA), a significant biodegradable polymer, is an ideal candidate for electromagnetic shielding matrix materials due to its excellent tensile strength and processability. IPU-PLA-PCL-MXene was obtained by grafting imidazole-functionalized polyurethane containing PLA and polycaprolactone (PCL) segments onto MXene nanosheets. IPU-PLA-PCL-MXene and hydroxylated carbon nanotubes (CNT-OH) were used to improve the electromagnetic interference (EMI) properties of PLA/PCL composites. CNT-OH is distributed at PCL phase and the phase interface because of the viscosity difference between the two polymer phases. IPU-PLA-PCL-MXene enhances the interfacial interactions between polymer phases, which became an effective bridge for the transfer of interfacial stress. Consequently, the elongation at break and notched impact strength of PLA/PCL/2I/8C reached 287.4 % and 64.1 kJ/m² respectively. CNT-OH and MXene form an effective three-dimensional conductive network, resulting in a substantial improvement in the EMI shielding property of PLA/PCL/2I/8C composite to 38 dB. This work provides a novel approach for highly tough and EMI shielding PLA/PCL composites.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.