Thermo-mechanical and insulating robust epoxy vitrimer for fully recyclable fiber reinforced composites relied on salen agent

Xu, Jiazhu; Sun, Wenjie; Liang, Yujie; Cheng, Yonghong; Zhang, Lei

doi:10.1016/j.polymer.2023.126233

Cited by 5 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermo-mechanical recycling methods involve physical techniques such as hot pressing and hydraulic pressing at elevated temperatures and pressures. [33] Thermosets with dynamic/rever-sible properties are typically cut or ground into pieces, then pressed using a hot press or hydraulic press to create recycled materials, with properties influenced by parameters such as temperature, pressure, and particle size. [34] In comparison to chemical recycling, thermo-mechanical recycling is considered more energy-consuming, potentially leading to thermal degradation or oxidation during sustained heating.…”

Section: Thermo-mechanical Recycling Of 3d Printed Thermosets With Dy...mentioning

confidence: 99%

Sustainable Vat Photopolymerization‐Based 3D‐Printing through Dynamic Covalent Network Photopolymers

Pruksawan,

Chong,

Zen

et al. 2024

Chemistry An Asian Journal

View full text Add to dashboard Cite

Vat photopolymerization (VPP) based three‐dimensional (3D) printing, including stereolithography (SLA) and digital light projection (DLP), is known for producing intricate, high‐precision prototypes with superior mechanical properties. However, the challenge lies in the non‐recyclability of covalently crosslinked thermosets used in these printing processes, limiting the sustainable utilization of printed prototypes. This review paper examines the recently explored avenue of VPP 3D‐printed dynamic covalent network (DCN) polymers, which enable reversible crosslinks and allow for the reprocessing of printed prototypes, promoting sustainability. These reversible crosslinks facilitate the rearrangement of crosslinked polymers, providing printed polymers with chemical/physical recyclability, self‐healing capabilities, and degradability. While various mechanisms for DCN polymer systems are explored, this paper focuses solely on photocurable polymers to highlight their potential to revolutionize the sustainability of VPP 3D printing.

show abstract

Section: Thermo-mechanical Recycling Of 3d Printed Thermosets With Dy...mentioning

confidence: 99%

Sustainable Vat Photopolymerization‐Based 3D‐Printing through Dynamic Covalent Network Photopolymers

Pruksawan,

Chong,

Zen

et al. 2024

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…In this regard, the use of carbon-derived particles [14,[19][20][21][22][23][24][25][26][27], such as carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), or short carbon fibers, has proved to be an efficient way to enhance the aforementioned properties, allowing in some cases to achieve multifunctional micro-or nanocomposites [11,16,17,19,21,28]. On the other hand, the introduction of a reinforcement in the polymeric matrix also implies a greater challenge for the recycling and recovery of the synthesized composite components [29,30]. Given the prevailing circumstances, some examples of micro-or nanocomposite recycling can be found in the literature [4,[29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the introduction of a reinforcement in the polymeric matrix also implies a greater challenge for the recycling and recovery of the synthesized composite components [29,30]. Given the prevailing circumstances, some examples of micro-or nanocomposite recycling can be found in the literature [4,[29][30][31][32][33][34][35]. Here, most effort has been put into using thermoplastic matrices, instead of thermoset ones, due to the intrinsic polymer nature of thermoplastics, free of crosslinking points between the polymeric chains.…”

Section: Introductionmentioning

confidence: 99%

Recyclable Multifunctional Nanocomposites Based on Carbon Nanotube Reinforced Vitrimers with Shape Memory and Joule Heating Capabilities

Cortés,

Sánchez-Romate,

Martinez-Diaz

et al. 2024

Polymers

View full text Add to dashboard Cite

The present study focuses on the multifunctional capabilities of carbon nanotube (CNT)-reinforced vitrimers. More specifically, the thermomechanical properties, the Joule effect heating capabilities, the electrical conductivity, the shape memory, and the chemical recycling capacity are explored as a function of the CNT content and the NH2/epoxy ratio. It is observed that the electrical conductivity increases with the CNT content due to a higher number of electrical pathways, while the effect of the NH2/epoxy ratio is not as prevalent. Moreover, the Tg of the material decreases when increasing the NH2/epoxy ratio due to the lower cross-link density, whereas the effect of the CNTs is more complex, in some cases promoting a steric hindrance. The results of Joule heating tests prove the suitability of the proposed materials for resistive heating, reaching average temperatures above 200 °C when applying 100 V for the most electrically conductive samples. Shape memory behavior shows an outstanding shape fixity ratio in every case (around 100%) and a higher shape recovery ratio (95% for the best-tested condition) when decreasing the NH2/epoxy ratio and increasing the CNT content, as both hinder the rearrangement of the dynamic bonds. Finally, the results of the recyclability tests show the ability to regain the nanoreinforcement for their further use. Therefore, from a multifunctional analysis, it can be stated that the proposed materials present promising properties for a wide range of applications, such as Anti-icing and De-icing Systems (ADIS), Joule heating devices for comfort or thermotherapy, or self-deployable structures, among others.

show abstract

Preparation and performance comparison of low‐dielectric epoxy resins cured by naphthalene‐ and phenyl‐based active esters

Zhu,

Liu,

Qin

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

The poor dielectric properties of epoxy resins limit their application in microelectronics, and active ester curing agent is an effective means to enhance the dielectric properties of epoxy resins. However, the phenyl active ester curing resins nowadays have the problem of low mechanical properties. In this work, a novel naphthalene‐based active ester‐cured resveratrol epoxy resin system (REP/NDA) was prepared for the first time. Compared with the phenyl‐active ester‐cured epoxy resin (REP/PDA), the naphthyl‐active ester prepared epoxy resin has obvious advantages in mechanical properties. The experimental results indicated a tensile strength measurement for REP/NDA at 91.9 MPa, the tensile strength of REP/PDA was 65.3 MPa, and the tensile strength of REP/NDA was 141% of that of REP/PDA. The prepared REP/NDA epoxy resin exhibits favorable dielectric properties, evidenced by a dielectric constant of 3.02 at 10 MHz and a dielectric loss of 0.0042, very good thermal stability (T5% of 379°C), excellent water absorption (only 0.49% for 7 days from 2 to 8°C) and good dimensional stability (coefficient of thermal expansion below Tg of 77 ppm). The first synthesis of naphthalene‐based active ester curing agent offers a reference for creating new low dielectric epoxy resin materials that work out exceptionally.

show abstract

Thermo-mechanical and insulating robust epoxy vitrimer for fully recyclable fiber reinforced composites relied on salen agent

Cited by 5 publications

References 63 publications

Sustainable Vat Photopolymerization‐Based 3D‐Printing through Dynamic Covalent Network Photopolymers

Sustainable Vat Photopolymerization‐Based 3D‐Printing through Dynamic Covalent Network Photopolymers

Recyclable Multifunctional Nanocomposites Based on Carbon Nanotube Reinforced Vitrimers with Shape Memory and Joule Heating Capabilities

Preparation and performance comparison of low‐dielectric epoxy resins cured by naphthalene‐ and phenyl‐based active esters

Contact Info

Product

Resources

About