Study on surface modification of PE⁃UHMW fiber by tannic acid and its interfacial property

doi:10.19491/j.issn.1001-9278.2024.08.005

Abstract

Abstract:

In this paper， tannic acid （TA） was used to modify the surface of ultra⁃high molecular weight polyethylene （PE⁃UHMW） fiber. The effects of metal ion type and reaction time on the properties of PE⁃UHMW fiber modified by tannic acid and metal ion （TA⁃［M］） were studied. Polyethyleneimine （PEI） was introduced into TA⁃［M］ modified solution. The effect of PEI molecular weight on the properties of TA⁃［M］⁃PEI modified PE⁃UHMW fiber and the effect of PEI on the stability of TA coating were studied. The results indicated that the TA coating was successfully coated on the surface of PE⁃UHMW fiber， and the phenolic hydroxyl functional group was introduced on the surface of the fiber. The interfacial shear strength between fiber and epoxy resin （EP） increased by 102.03 % after TA⁃Fe modification for 12 h. The interfacial shear strength with polyurethane resin （PU） increased by 97.78 %. The interfacial bonding strength between fiber and PU increased by 44.35 % after TA⁃Fe modification for 12 h. The interfacial bonding strength with EP increased by 58.50 %. The amino compound PEI can improve the stability of TA coating. After ultrasonic cleaning experiment， the interfacial bonding strength of PE@TA⁃Fe⁃PEI600 decreased less than that of PE@TA⁃Fe.

Key words: ultra?high molecular weight polyethylene fiber, tannic acid, surface modification, interface enhancement

CLC Number:

TQ325.1⁺2

CHEN Tianhuan, YAN Cheng, JIANG Ganbing, GUO Shuai, YAN Tiantian, QIAN Kun, YU Kejing. Study on surface modification of PE⁃UHMW fiber by tannic acid and its interfacial property[J]. China Plastics, 2024, 38(8): 26-32.

Figures/Tables 18

Fig.1. Surface modification schematic diagram of the PE⁃UHMW fiber

Fig.2. FTIR spectra of the PE⁃UHMW fibers before and after modification

Fig.3. SEM images of the PE⁃UHMW fibers before and after modification

Fig.4. Schematic diagram of TA oxidation and its reaction mechanism with metal ions

Fig.5. Tensile strength of the PE⁃UHMW fibers before and after modification

Fig.6. XIFSS of the samples

Fig.7. Morphology of the resin microspheres on the fiber surface

Fig.8. TFBT test results

Fig.9. FTIR spectra of the PE⁃UHMW fibers before and after modification

Fig.10. SEM images of the PE⁃UHMW fibers before and after modification

Fig.11. Tensile strength of the PE⁃UHMW fibers before and after modification

Fig.12. XIFSS of the samples

Fig.13. FTIR spectra of the PE⁃UHMW fibers before and after modification

Fig.14. SEM images of the PE⁃UHMW fibers before and after modification

Fig.15. Schematic diagram of TA reaction mechanism with PEI

Fig.16. Tensile strength of the PE⁃UHMW before and after modification

Fig.17. XIFSS of the samples

Fig.18. Interface bonding strength of the modified fiber interface before and after cleaning

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