Epoxidation of agricultural byproduct konjac fly powder and utilization in toughening and strengthening epoxy resin

Mi, Xiaoqian; Fang, Wei; Zhong, Liuyue; Zeng, Liang; Zhang, Junheng; Xu, Zejun; Zhang, Daohong; Miao, Menghe

doi:10.1016/j.indcrop.2020.112161

Cited by 17 publications

(16 citation statements)

References 53 publications

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“…From Figure 13(d), it can be seen that the fracture surfaces of the PAEK-20/EP samples displayed a relatively rough surface with shear deformation, which corresponding to higher energy absorption and tougher matrix. 39 From the amplification region, we can see that the bicontinuous structure was formed. But at this moment the continuous phase is still epoxy phase, while the thermoplastic resins are only dispersed in the epoxy continuum phase as spherical particles, it’s just a continuous trend (blue dotted lines in Figure 13(d)).…”

Section: Resultsmentioning

confidence: 96%

Dynamic compression and tensile responses of an epoxy matrix composites at high strain rate

Meng

Liu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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To study the dynamic compression and tensile mechanical behaviors of a bicomponent epoxy resin matrix composites, which were filled with a semi-crystalline thermoplastic Polyether-ether ketone (PAEK-C) resin, at high strain rate, the dynamic compression and tensile experiments were carried out on a modified split Hopkinson pressure bar (SHPB) and high speed material apparatus, respectively. Stress-strain curves of the epoxy resin matrix composites were obtained and analyzed. Damage mechanism under high strain rate was characterized through the scanning electron microscope (SEM) observation. Results of the dynamic compression tests indicated that, although the effects of strain rate remarkably influenced the variations in stress, the behaviors of the epoxy resin matrix played a more significant role than strain rate in the determination of the high strain rate. It was reflected through increased ductility of the samples and reduced slope of the stress-strain curves. The dynamic impact tensile tests results show that, PAEK-C fillers exhibited dramatic toughening effect. The increase of the volume fraction of PAEK-C rich phase inevitably forces the crack to overcome more tearing deformation of PAEK-C rich phase. At the same time, the enhancement of plastic capacity may also induce a larger range of cooperative deformation at the crack tip.

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Section: Resultsmentioning

confidence: 96%

Dynamic compression and tensile responses of an epoxy matrix composites at high strain rate

Meng

Liu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Recently, we have synthesized epoxidized konjac flying powder to simultaneously increase the strength and fracture toughness of epoxy resin. 27 In this study, we report a facile strategy to prepare a KFP-based adsorbent for heavy metal removal. In order to improve the removal ability, KFP was graft copolymerized with acrylic acid, methacrylic acid and N , N ′-methylene bis(acrylamide) to prepare a sponge like lightly crosslinked hydrogel (hereby denoted as KFPH) with copious OH, NH, and COOH functionalities.…”

Section: Introductionmentioning

confidence: 99%

A high-performance polymer hydrogel derived from konjac flying powder for removal of heavy metals

Zhong¹,

Li²,

Zhang

et al. 2022

New J. Chem.

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“… 3 However, the rigid benzene structure of DGEBA and the high cross-linking density of its thermosets normally result in brittleness and poor impact strength, limiting its application to a large extent. 4 − 6 …”

Section: Introductionmentioning

confidence: 99%

“…Epoxy resin is one of the most important thermosetting resins, which has been widely used as coatings, adhesives, matrix resins, and so on. , In particular, the diglycidyl of bisphenol A (DGEBA), a commercial epoxy resin, exhibits high mechanical strength, excellent thermodynamic properties, and favorable stability after being cured with curing agents . However, the rigid benzene structure of DGEBA and the high cross-linking density of its thermosets normally result in brittleness and poor impact strength, limiting its application to a large extent. − …”

Section: Introductionmentioning

confidence: 99%

Diphenolic Acid-Derived Hyperbranched Epoxy Thermosets with High Mechanical Strength and Toughness

Xiao¹,

Li²,

Li³

et al. 2021

ACS Omega

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Diglycidyl ether of bisphenol A (DGEBA) is a kind of widely used epoxy resin, but its thermosets normally show high brittleness and poor impact resistance due to the intrinsic rigid aromatic rings, which limit its application greatly. To avoid this drawback, we proposed a method to prepare a series of hyperbranched epoxies (HBEPs) with different molecular weights. After HBEPs were cured with methyl tetrahydrophthalic anhydride (MTHPA), characterizations were carried out to evaluate the properties of the cured HBEP samples. Testing results indicate that the hyperbranched thermosets can achieve excellent mechanical strength and toughness (tensile strength: 89.2 MPa, bending strength: 129.6 MPa, elongation at break: 6.1%, toughness: 4.5 MJ m –3 , and impact strength: 6.7 kJ m –2 ), which are superior to those of the thermosets of commercial DGEBA (tensile strength: 81.2 MPa, bending strength: 108.2 MPa, elongation at break: 3.0%, toughness: 1.5 MJ m –3 , and impact strength: 4.2 kJ m –2 ). In addition, HBEP with the highest molecular weight and degree of branching shows the best comprehensive mechanical properties. All hyperbranched thermosets exhibit high glass-transition temperatures ( T g ) and thermostability, which further illustrates the potential application value of HBEPs.

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Epoxidation of agricultural byproduct konjac fly powder and utilization in toughening and strengthening epoxy resin

Cited by 17 publications

References 53 publications

Dynamic compression and tensile responses of an epoxy matrix composites at high strain rate

Dynamic compression and tensile responses of an epoxy matrix composites at high strain rate

A high-performance polymer hydrogel derived from konjac flying powder for removal of heavy metals

Diphenolic Acid-Derived Hyperbranched Epoxy Thermosets with High Mechanical Strength and Toughness

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