View in EDS

Study on Properties and Mechanism of Carboxylated MWCNTs Synergistically Modified Shape Memory Epoxy Resin.

Saved in:
Bibliographic Details
Title: Study on Properties and Mechanism of Carboxylated MWCNTs Synergistically Modified Shape Memory Epoxy Resin.
Authors: Wan, Tao1,2,3 (AUTHOR), Chang, Zhaonan4 (AUTHOR), Fu, Na2 (AUTHOR), Jin, Yijie1 (AUTHOR), Liu, Mingzhe5 (AUTHOR), Wang, Bo3 (AUTHOR) wangbobo421@163.com, Wei, Shicheng3 (AUTHOR) wsc33333@163.com, Han, Qing2 (AUTHOR), Wang, Yujiang3 (AUTHOR), Jia, Dan1 (AUTHOR) jiadan0510@163.com
Source: Polymers for Advanced Technologies. Jun2026, Vol. 37 Issue 6, p1-12. 12p.
Subjects: Multiwalled carbon nanotubes, Shape memory polymers, Durability, Composite materials, Thermal stability, Surface interactions, Shape memory effect, Mechanical behavior of materials
Abstract: To address the application bottlenecks of DMF‐modified shape memory epoxy resin (SMEP), including insufficient toughness and reduced mechanical strength, a synergistic modification strategy using carboxylated multi‐walled carbon nanotubes (MWCNTs) was proposed in this study, and a novel MWCNT‐reinforced SMEP composite system was fabricated. Characterizations including Fourier transform infrared spectroscopy (FT‐IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TG‐DTG), and dynamic mechanical analysis (DMA) were performed, combined with tensile, flexural, and impact tests as well as fracture morphology observations. The effects of MWCNT content on the microstructure, thermal stability, mechanical properties, and shape memory behaviors of the composites were systematically investigated. The results demonstrated that carboxylated MWCNTs formed strong interfacial interactions with the SMEP matrix, which effectively suppressed filler agglomeration and improved interfacial bonding. With an optimized MWCNT content of 0.25 wt%, the composite exhibited the best balance between interfacial anchoring and thermal conductivity enhancement. Compared with neat SMEP, the MWCNT/D‐SMEP composite showed significantly enhanced tensile strength, flexural strength, and impact resistance while maintaining excellent thermal stability. Meanwhile, the shape fixity ratio reached 100%, and the shape recovery rate was maximized. This study not only provides an effective strategy to overcome the performance trade‐off between toughness and strength in DMF‐modified shape memory epoxy resins, but also reveals the interfacial interaction mechanism between MWCNTs and the D‐SMEP matrix. The findings lay a reliable experimental and theoretical basis for the design, preparation, and engineering applications of high‐performance intelligent shape memory composite materials. [ABSTRACT FROM AUTHOR]
Copyright of Polymers for Advanced Technologies is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:To address the application bottlenecks of DMF‐modified shape memory epoxy resin (SMEP), including insufficient toughness and reduced mechanical strength, a synergistic modification strategy using carboxylated multi‐walled carbon nanotubes (MWCNTs) was proposed in this study, and a novel MWCNT‐reinforced SMEP composite system was fabricated. Characterizations including Fourier transform infrared spectroscopy (FT‐IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TG‐DTG), and dynamic mechanical analysis (DMA) were performed, combined with tensile, flexural, and impact tests as well as fracture morphology observations. The effects of MWCNT content on the microstructure, thermal stability, mechanical properties, and shape memory behaviors of the composites were systematically investigated. The results demonstrated that carboxylated MWCNTs formed strong interfacial interactions with the SMEP matrix, which effectively suppressed filler agglomeration and improved interfacial bonding. With an optimized MWCNT content of 0.25 wt%, the composite exhibited the best balance between interfacial anchoring and thermal conductivity enhancement. Compared with neat SMEP, the MWCNT/D‐SMEP composite showed significantly enhanced tensile strength, flexural strength, and impact resistance while maintaining excellent thermal stability. Meanwhile, the shape fixity ratio reached 100%, and the shape recovery rate was maximized. This study not only provides an effective strategy to overcome the performance trade‐off between toughness and strength in DMF‐modified shape memory epoxy resins, but also reveals the interfacial interaction mechanism between MWCNTs and the D‐SMEP matrix. The findings lay a reliable experimental and theoretical basis for the design, preparation, and engineering applications of high‐performance intelligent shape memory composite materials. [ABSTRACT FROM AUTHOR]
ISSN:10427147
DOI:10.1002/pat.70647