Hyperbranched epoxy resin-grafted graphene oxide for efficient and all-purpose epoxy resin modification

Liang, Xue; Li, Xiaojie; Tang, Yong; Wei, Wei; Liu, Xiaoya

doi:10.1016/j.jcis.2021.12.068

Cited by 60 publications

(25 citation statements)

References 55 publications

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“…Dynamic mechanical properties were measured by DMA equipment (DMA850, TA instruments, USA) according to ASTM D4065 (5 × 30 × 0.4 mm 3 ). A film clamp was used in multi‐frequency strain mode with a temperature range of 0 to 150°C and a heating rate of 5°C/min at a frequency of 10 Hz 35 …”

Section: Methodsmentioning

confidence: 99%

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Improving mechanical and thermal properties of short carbon fiber/polyamide 6 composites through a polydopamine/nano‐silica interface layer

Song

Peng

et al. 2022

J of Applied Polymer Sci

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Carbon fiber (CF) reinforced matrix composites have been applied widely, however, the interfacial adhesion of composites is weak due to smooth and chemically inert of CF surface. To solve this problem, A polydopamine/nanosilica (PDA-SiO 2 ) interfacial layer on carbon fiber surface was constructed via polydopamine and nano-SiO 2 (CF-PDA-SiO 2 ) by a facile and effective method to reinforce polyamide 6 composites (CFs/PA6). The effects of PDA-SiO 2 interfacial layer on crystallization structure and behavior, thermal properties, and mechanical properties of CFs/PA6 composites were investigated. Furthermore, interfacial reinforcement mechanism of composites has been discussed. This interfacial layer greatly increased the number of active groups of CF surface and its wettability obviously. The tensile strength of CF-PDA-SiO 2 /PA6 composites increased by 28.09%, 19.37%, and 26.22% compared to untreated-CF/ PA6, CF-PDA/PA6, and CF-SiO 2 /PA6 composites, respectively, which might be caused by the increased interfacial adhesion between CF and PA6 matrix. The thermal stability, crystallization temperature, crystallinity, and glass transition temperature (T g ) of CF-PDA-SiO 2 /PA6 composites improved correspondingly, attributing to the heterogeneous nucleation of nano-SiO 2 in the crystalline area and hydrogen bonds with molecular chains of PA6 in the amorphous area. This work provides a novel strategy for the construction of interfaces suitable for advanced CF composites with different structures.

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Section: Methodsmentioning

confidence: 99%

“…A film clamp was used in multi-frequency strain mode with a temperature range of 0 to 150 C and a heating rate of 5 C/min at a frequency of 10 Hz. 35 3 | RESULTS AND DISCUSSION…”

Section: Characterizationsmentioning

confidence: 99%

Improving mechanical and thermal properties of short carbon fiber/polyamide 6 composites through a polydopamine/nano‐silica interface layer

Song

Peng

et al. 2022

J of Applied Polymer Sci

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“…But when it comes to CF-SiO 2 /PA6 and CF-PDA-SiO 2 /PA6 composites, the T g enhanced to nearby 80.0℃ approximately. The increment in Tg might result from the two reasons: the enhanced mechanical interlocking between CFs and PA6 restrained the mobility of the molecular chains of matrix; Moreover, the improved interaction between CF and PA6 caused the change in molecular chain mobility near the nano-SiO 2 particles and a reduction in free volume [29,32].…”

Section: Mechanical Properties Of Cfs/pa6 Compositesmentioning

confidence: 99%

“…In order to deep-going analysis, the view for temperature at 10 wt% of weight lost (T 10% ) was enlarged and presented in Fig. 5b [29]. In comparison to pure PA6, the T 10% of CF/PA6 and modi ed-CF/PA6 composites had varying degrees of improvement.…”

Section: Thermal Stability Of Cfs/pa6 Compositesmentioning

confidence: 99%

Construction of double grafted interfacial layer to improve thermal and mechanical properties of short carbon fiber reinforced polyamide 6 composites

Gao

Peng

et al. 2022

Preprint

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A double grafted interfacial layer on CF surface was constructed via PDA and nano-SiO2 (CF-PDA-SiO2) by a facile and effective method to reinforce polyamide 6 composites (CFs/PA6). The effects of double grafted interfacial layer on crystallization structure and behavior, thermal properties, and mechanical properties of CFs/PA6 composites were investigated. This interfacial layer greatly increased the number of active groups, roughness and wettability of CF surface, the tensile strength of CF-PDA-SiO2/PA6 composites increased by 28.09%, 19.37%, and 26.22% compared to untreated-CF/PA6, CF-PDA/PA6, and CF-SiO2/PA6 composites, respectively, which might be caused by the increased interfacial adhesion between CF and PA6 matrix. The thermal stability, crystallization temperature, crystallinity, as well as glass transition temperature (Tg) of CF-PDA-SiO2/PA6 composites improved correspondingly, attributing to the heterogeneous nucleation of nano-SiO2 in the crystalline area and hydrogen bonds with molecular chains of PA6 in the amorphous area. Furthermore, interfacial reinforcement mechanism of composites have been discussed.

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“…Given their practical purposes, improving the mechanical performances of CFRPs has attracted a lot of research interest since the concept of CFRPs was proposed [ 7 , 8 ]. Enhancing the mechanical properties of each constituent and optimizing their balance have been carefully considered [ 9 , 10 , 11 ]. Besides that, the interfacial properties between the carbon fiber and the polymer matrix play an important role, the control of which is of great importance to ensure efficient load transfer from the matrix to the reinforced counterparts.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Strengthening and Self-Monitoring in Carbon Fiber-Reinforced Composites via Carbon Nanotube-Based Damage Sensors

Sun

Yang

et al. 2022

Nanomaterials

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Carbon fiber-reinforced polymers are important constituents of aerospace materials. However, due to the inert surface of CFs, their interfacial property is relatively weak, which severely hinders their practical applications. Here, we deposited multi-walled carbon nanotubes (MWCNTs) along with a coupling agent on the surface of carbon fiber to improve the interfacial properties of the carbon fiber/resin. Via a simple dip-coating method, the MWCNTs were uniformly distributed on the CF surface with the assistance of the pre-coated coupling agent. The interfacial shear strength between the fiber and the matrix was significant enhanceed when the CF was loaded with the coupling agent and the MWCNTs. In addition, the MWCNTs were used as sensors to in-situ monitor the interfacial state in order to elucidate the interfacial strengthening mechanism. It revealed that the collaborative contribution of the coupling agent and the MWCNTs in the interphase region is the key to the high interfacial strength.

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Hyperbranched epoxy resin-grafted graphene oxide for efficient and all-purpose epoxy resin modification

Cited by 60 publications

References 55 publications

Improving mechanical and thermal properties of short carbon fiber/polyamide 6 composites through a polydopamine/nano‐silica interface layer

Improving mechanical and thermal properties of short carbon fiber/polyamide 6 composites through a polydopamine/nano‐silica interface layer

Construction of double grafted interfacial layer to improve thermal and mechanical properties of short carbon fiber reinforced polyamide 6 composites

Interfacial Strengthening and Self-Monitoring in Carbon Fiber-Reinforced Composites via Carbon Nanotube-Based Damage Sensors

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