Mechanism Analysis of Carbon Fiber Prepared by Recycled Polyethylene⁃Template Method

doi:10.19491/j.issn.1001-9278.2021.08.013

Abstract

Abstract:

The high?value recycling of plastics has become a focus of social and economic researches. In this work， a type of polyethylene?based carbon fiber was successfully prepared by means of a graphene?templating method through the conversion of organic and inorganic materials using low?cost recycled polyethylene. Molecular dynamics simulation was also conducted to analyze the preparation mechanism of the graphene?templating method. The graphene template can promote the growth of the six?membered ring?layered structure of carbon fiber. This is beneficial to the carbonization of polyethylene fibers. Raman spectroscopy and XPS were used to characterize the obtained carbon fiber. The results indicated that the graphene template could facilitate the carbonization of the fiber.

Key words: recycled polyethylene, graphene template, carbon fiber, molecular dynamics, mechanism analysis

CLC Number:

TQ320

JIAO Jiali, YANG Weimin, GAO Xiaodong, SONG Lijian, CHENG Lisheng. Mechanism Analysis of Carbon Fiber Prepared by Recycled Polyethylene⁃Template Method[J]. China Plastics, 2021, 35(8): 94-99.

Figures/Tables 8

Fig.1. Melt spinning and fiber sulfonation

Fig.2. Single PE molecular chain model

Fig.3. Metallographic micrographs of PE fibers with different graphene contents

Fig.4. PE?based carbon fibers with different graphene contents

Fig.5. Raman spectra of PE?based carbon fibers with different graphene contents

Fig.6. XPS full spectrum of carbon fiber

Fig.7. XPS diagram of C1s of graphene

Fig.8. Reaction molecular dynamics simulation during high?temperature carbonization of PE

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