Interfacial properties of high failure strain polyimide fiber/epoxy composites analyzed by a modified single fiber fragmentation test

Lin, Fangbing; Du, Xiaoming; Li, Wei; Jiang, Jinhua; Chen, Nanliang

doi:10.1016/j.apsusc.2020.145869

Cited by 24 publications

(17 citation statements)

References 39 publications

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“…This can be mainly attributed to the Si–O bond in the molecular chain. This Si–O bond is easy to rotate, which can reduce the brittleness of the cross-linking system [ 16 ]. The fracture surface of the ternary resin is scaly and shows better uniformity.…”

Section: Resultsmentioning

confidence: 99%

“…Jiang Shufang et al [ 15 ] reported the use of the silicone-modified epoxy resin during this process and the silicone group was introduced into the cross-linking network of the epoxy resin by formation of covalent bonds. Compared with the unmodified epoxy resin, the modified epoxy resin has a lower glass transition temperature and better mechanical properties [ 16 ]. More importantly, the epoxy resin was toughened significantly by the introduction of silicon–oxygen bonds, but the temperature resistance performance was not improved further.…”

Section: Introductionmentioning

confidence: 99%

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Research on Resin Used for Impregnating Polyimide Fiber Paper-Based Composite Materials

et al. 2021

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In this paper, a resin with high adhesion, easy curing, good flexibility, and high temperature resistance was prepared from polyimide fiber paper. First, in order to improve the toughness and curability of impregnating resin, epoxy resin was modified by addition of vinyl silicone resin. Subsequently, ternary resin with high temperature stability was obtained by polyimide resin addition. Among the investigated conditions, the optimal additive amount of vinyl silicone resin and polyimide resin was 30% and 5%, respectively. The prepared ternary resin has better toughness, crosslinking degree, high temperature stability (5% mass loss at 339.2 °C) and no obvious glass transition at high temperature. Finally, the polyimide fiber paper-based composite material was impregnated with modified epoxy resin and ternary resin, respectively. The results shows that the paper-based composite material impregnated with modified epoxy resin has a better fiber bonding degree, a smooth surface, and contact angle could reach up to 148.71°. Meanwhile, the paper-based composite material impregnated with ternary resin has good high temperature resistance, and the tensile index of the paper-based composite material could reach up to 35.1 N·m/g at 200 °C.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on Resin Used for Impregnating Polyimide Fiber Paper-Based Composite Materials

et al. 2021

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“…The increase of fiber surface roughness contributes to better surface wettability and mechanical interlocking effect, which can enhance the interfacial adhesion between the PI yarn and GO. 38 After the pristine PI and M-PI yarns had undergone the repeated dip-coating and reducing process 10 times, PI/RGO and M-PI/RGO yarns were obtained and are shown in Figure 3. The pristine PI (Figure 3 uneven and aggregates in some areas, which would lead to poor conductivity (Figure 3(d)).…”

Section: Sem Analysismentioning

confidence: 99%

Mechanical and electrical properties of graphene-coated polyimide yarns improved by nitrogen plasma pre-treatment

Lin

Jiang

et al. 2021

Textile Research Journal

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One-dimensional high-performance yarns with excellent conductivity and flexibility are of considerable interest in the energy and aerospace industries. However, how to achieve highly conductivity, excellent flexibility, extreme condition durability and high mechanical performance in one fiber material is still a great challenge using economically viable materials and synthesis technologies. Herein, we report electrically conductive yarns (modified polyimide (M-PI)/reduced graphene oxide (RGO) yarns) consisting of RGO coated on the surface of nitrogen plasma M-PI yarns, which are fabricated by combining the N2 plasma pre-treatment and repeated dip-coating and reducing technique. N2 plasma treatment is used to roughen the surface of the PI yarn and introduce functional groups, contributing to improve wettability, which can provide a stronger adhesion of the graphene coating. The dip-coating and reducing process was repeated 10 times to enhance the loading mass of RGO on the PI yarns, then M-PI/RGO yarns with better conductivity property can be obtained. The effects of N2 plasma treatment power and time on the M-PI yarns and M-PI/RGO yarns are investigated and discussed. The results demonstrate that the graphene layer is uniformly and densely coated on the PI yarn when being treated at 200 W for 8 min, and the conductivity of the M-PI/RGO yarn reaches 1.51 × 102 S/m. The M-PI/RGO yarn combine the advantages of RGO and PI yarns, retaining the mechanical properties and thermal stability of PI yarn while exploiting the conductive property of RGO. In addition, the enhanced adhesion between the PI yarn and graphene coating endows the composite yarns with excellent fastness and superior flexibility. This work describes an environmentally friendly, controllable and facile method to develop flexible and conductive functional graphene-coated PI yarns with high-performance properties.

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“…A large number of studies have shown that the mechanical properties of the interface are different from those of the matrix. [11][12][13][14][15] Therefore, the stress on the interface will be underestimated from the matrix's stress approximation, resulting in inaccurate prediction of the failure strength of the composite. In our work, an improvement is made on the basis of original RVE, namely, the RVE is geometrically decomposed into three parts, fiber region, matrix region, and a zero thickness interface layer which is inserted by the function of high version ABAQUS.…”

Section: Introductionmentioning

confidence: 99%

Micro failure analysis of fiber metal laminates

Lin

Cheng

Dai

et al. 2022

Journal of Reinforced Plastics and Composites

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In the failure analysis of composite materials, the damage of fiber and matrix is always noticed rather than the debonding of interface which is responsible for transferring the load between matrix and fiber. The stress amplification factors of fiber, matrix, and interface were extracted by establishing representative volume element model with interface and the strength of corresponding constituent is calculated in our work. Micro mechanics of failure served as the initial failure criterion of material components, and user-material subroutine (UMAT) was applied to realize progressive damage analysis of fiber metal laminate (FML) under different loading angles. The analysis results show that it is not strictly correct to directly use the stress on the matrix to calculate interface stress, and the damage trend of interface is consistent with that of fiber. The strain hardening phenomenon of FML decreases with larger loading angle, and the mechanical response of FML is about 45° symmetric due to its structure symmetry. The simulation results are in good agreement with the experiment results.

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Interfacial properties of high failure strain polyimide fiber/epoxy composites analyzed by a modified single fiber fragmentation test

Cited by 24 publications

References 39 publications

Research on Resin Used for Impregnating Polyimide Fiber Paper-Based Composite Materials

Research on Resin Used for Impregnating Polyimide Fiber Paper-Based Composite Materials

Mechanical and electrical properties of graphene-coated polyimide yarns improved by nitrogen plasma pre-treatment

Micro failure analysis of fiber metal laminates

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