Two Strategies to precisely tune the mechanical properties of plant oil-derived epoxy resins

Zhou, Jiangjun; Kong, Xu; Xie, Mengjia; Wu, Haifeng; Hua, Zan; Wang, Zhongkai

doi:10.1016/j.compositesb.2019.05.096

Cited by 23 publications

(18 citation statements)

References 51 publications

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“…13,54−58 In our previous work, we have demonstrated that plant oil-based epoxy resins undergo excellent shape memory properties. 4,59,60 The crystallinity might affect the shape−memory properties. 61,62 The DSC curves of EP2-CA in Figure S6 do no show a melting peak, which indicates the absence of crystals.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…After being cured with anhydrides, mechanically robust epoxy resins derived from soybean oils were obtained. We also demonstrated that by controlling the degree of epoxidation of the unsaturated fatty acids or the polymer main chain rigidity, the mechanical properties of the plant oil-based epoxy resin can be precisely tuned. , …”

Section: Introductionmentioning

confidence: 93%

“…We also demonstrated that by controlling the degree of epoxidation of the unsaturated fatty acids or the polymer main chain rigidity, the mechanical properties of the plant oil-based epoxy resin can be precisely tuned. 4,33 Until now, a few barriers still need to be removed before the commercialization of plant oil-based epoxy polymers and their high-performance thermosets. 34−36 First of all, the unsaturated double bonds of fatty acids greatly depress the free radical polymerization of (methyl) methacrylate monomers and others.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Epoxy resin represents one of the most important thermoset polymeric material, which possesses outstanding mechanical properties, electrical properties, chemical resistance, and thermal stability. Epoxy resin has taken ∼70% of the commercial thermosets market and been widely used as coatings, adhesives, electronic materials, and structural materials. − As the production and consumption of epoxy resins increased dramatically, there are several issues need to be reconsidered carefully. The accumulation of nondegradable epoxy resin microparticles in soils and oceans has become one of the most serious environmental pollutions.…”

Section: Introductionmentioning

confidence: 99%

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Recyclable and Mechanically Robust Palm Oil-Derived Epoxy Resins with Reconfigurable Shape-Memory Properties

Zhang

Zhou

et al. 2020

ACS Sustainable Chem. Eng.

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The development of sustainable epoxy resins from renewable biomass is gaining more and more attention. In most cases, chemically cross-linked biomass-derived epoxy resins are nonrecyclable. Here, mechanically strong and recyclable epoxy resins from palm oil that possess reconfigurable shape memory properties are developed. By converting palm oil-based methyl methacrylate monomers into epoxy monomers, high molecular weight palm oil-based epoxy polymers (EP) are prepared with high conversion. After being cured with citric acid (CA) without using any catalyst, palm oil-based epoxy resins (EP-CA) cross-linked with β-hydroxyl ester groups are obtained. The EP-CA can rearrange the chemical network topology through transesterification reactions, which endows the materials with the ability to be recycled and reshaped. The EP-CA prepared via the epoxy polymer approach contains a well-defined network structure, resulting in remarkable mechanical properties. Moreover, the dynamic network structure allows the EP-CA samples to possess reconfigurable shape memory properties.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recyclable and Mechanically Robust Palm Oil-Derived Epoxy Resins with Reconfigurable Shape-Memory Properties

Zhang

Zhou

et al. 2020

ACS Sustainable Chem. Eng.

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“…In recent years, bio-based alicyclic compounds such as cellulose and starch have been successfully used in the synthesis and preparation of epoxy resins. [12][13][14] However, the introduction of a large amount of alicyclic structure will affect the thermal stability of epoxy resin and reduce its performance in practical application, which is far from the thermal and mechanical properties of traditional BPA type epoxy resin. 15 The excellent performance of BPA type epoxy resin is contributed to the large amount of benzene ring structure, which can not only improve the thermal properties of the polymer, but also bring excellent mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

High‐epoxy value bio‐based epoxy emulsion reinforced interfacial properties of carbon fiber/epoxy composites

Chen

Ding

Cui

et al. 2021

J of Applied Polymer Sci

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The development of new bio-based epoxy resins and the search for new application areas have become important research directions for bio-based epoxy resins. Using protocatechuic acid (PA) as a bio-based raw material, brominated alkenes with different chain length were introduced into PA through substitution reaction, and then oxidized to obtain epoxy resins (PA-EP) with different epoxy values. After that, it was introduced into epoxy resin (diglycidyl ether bisphenol A [DGEBA]) sizing agent to replace part of DGEBA to prepare new sizing agents. Sizing amount test and sizing CF surface morphology show that the introduction of PA-EP with high-epoxy value made it easier be adhered to carbon fiber (CF) surface during sizing process. Interfacial shear strength and interlaminar shear strength of composite made of sizing CF (20 wt% PA-EP-3) were 56.86% and 30.29% improvement against the bare CF, which was attributed to the increase in surface energy and epoxy groups after CF sizing. Therefore, PA-EP with high-epoxy value was applied as sizing agent for improving interface performance of CF for the first time, and this application was less affected by its low-output problem compared to its application as a matrix resin in the field of composite manufacturing.

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Facile synthesis of intrinsically flame‐retardant epoxy thermosets with high mechanical properties from lignin derivatives

Chen

Zhang

He³

et al. 2023

J of Applied Polymer Sci

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Preparing bio-based epoxy resins with high performance is crucial to sustainable development. However, seeking renewable and flame-retardant epoxy resins with high mechanical properties are still challenging. Here, we reported a facile way to transform lignin derivatives to intrinsic flame-retardant epoxy resins with satisfactory mechanical properties. Two guaiacol-based novolac epoxy resins (i.e., GTEP/DDM and GPEP/DDM) were prepared as alternatives for petroleum-based DGEBA/DDM. The cured GTEP/DDM product showed a high T g of 209.5 C, a high tensile modulus of 3.13 GPa, and a high LOI of 28.6% with UL-94 V-1 rating, which outperformed DGEBA/DDM system. Specially, GPEP/DDM resin possessed more superior mechanical properties (e.g., tensile strength of 73.9 MPa, and tensile modulus of 5.85 GPa) owing to additional interactions (i.e., π-π interactions and hydrogen bonds), and outstanding anti-flammability (e.g., LOI of 31.2% with UL-94 V-0 rating) due to the endow of phosphorus-containing groups. The mechanical reinforcement and flame-retardant mechanisms were clarified based on structural evolution and performance variation. This work provides an efficient synthesis route to

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Two Strategies to precisely tune the mechanical properties of plant oil-derived epoxy resins

Cited by 23 publications

References 51 publications

Recyclable and Mechanically Robust Palm Oil-Derived Epoxy Resins with Reconfigurable Shape-Memory Properties

Recyclable and Mechanically Robust Palm Oil-Derived Epoxy Resins with Reconfigurable Shape-Memory Properties

High‐epoxy value bio‐based epoxy emulsion reinforced interfacial properties of carbon fiber/epoxy composites

Facile synthesis of intrinsically flame‐retardant epoxy thermosets with high mechanical properties from lignin derivatives

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