Influence of MWCNT transfer on the properties of MWCNT/PLA/PE blends

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-02-25 DOI:10.1016/j.diamond.2025.112152

Mohammed H. Al-Saleh, Hiba M. Malas

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Abstract

The influence of carbon nanotubes (CNTs) transfer and mixing time on the microstructure, processing behavior, electrical resistivity, and electromagnetic interference (EMI) shielding characteristics of 80/20 vol/vol polylactic acid (PLA)/high-density polyethylene (HDPE) blend filled with 5 wt% (3.7 vol%) CNTs were investigated. For CNTs-filled PLA/HDPE blends, it is known that CNTs selectively localize in the HDPE domain. Thus, in this work, CNTs were initially premixed with the PLA, and then the HDPE was added to monitor the nanotubes transfer and investigate the effects of nanotubes transfer from the PLA phase to the HDPE phase on the composite properties. The analysis of scanning electron microscope graphs showed that most of the nanotubes transferred from the PLA phase to the HDPE phase in less than 1.0 min without any accumulation of the nanotubes at the PLA/HDPE interface. The CNTs/PLA/HDPE composite exhibited an increase in electrical resistivity and a decrease in EMI shielding with the increase in CNTs transfer time. For example, the EMI shielding decreased from 22.7 dB to 16.8 dB by increasing the transfer time from 1 min to 2 min. Thus, preparing the blends at the shortest possible mixing time is recommended to obtain the highest possible EMI performance.

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.