Preparation of carboxylated lignin-based epoxy resin with excellent mechanical properties

Zhang, Yongjian; Wang, Hao; Eberhardt, Thomas L.; Gu, Qiang; Pan, Hui

doi:10.1016/j.eurpolymj.2021.110389

Cited by 34 publications

(24 citation statements)

References 41 publications

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“…The common method of toughening epoxy resin is to add toughening agent, such as nano particles [5][6][7] , liquid crystal polymer 8 , fiber 9,10 , polymer 11,12 , Lignin 13 , block polymer 14,15 , hyperbranched polymer 16 , and natural fills [17][18][19][20][21] etc., which can effectively improve the brittleness of epoxy resin, and broaden its application in the industrial field. Biomass toughened epoxy resin has become a research hotspot due to its green and sustainable development [22][23][24] .…”

Section: Selfmentioning

confidence: 99%

Self-extracted corn-stalk cellulose/epoxy resin composites

Lou

Jiang

Yan

et al. 2022

Sci Rep

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In order to make full use of crop waste stalk, corn-stalk cellulose (CSC) was extracted by acid–base method and used as modifier of epoxy resin (E51) to prepare the self-extracted corn-stalk cellulose/epoxy resin composites (CSCEC). Differential scanning calorimeter (DSC), thermogravimetry (TG) analysis, dynamic mechanical analysis (DMA), morphology analysis by scanning electron microscope (SEM), the mechanical properties by electronic universal testing machine and impact testing machine were used for characterization and analysis. The experimental results showed that when the CSC content was 20 wt%, the impact strength of the composite was 2.50 kJ/m2, which was 127.2% higher than that of pure epoxy resin. When the CSC content was 20 wt%, the Tg of epoxy resin obtained by DMA was the lowest, 167.4 °C, which decreased by 11.3 °C compared with that of pure epoxy resin. The SEM result showed that the fracture surface of the composite became obviously rough and had of obvious folds, which was a ductile fracture. These results indicated that the addition of CSC could toughen the epoxy resin.

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Section: Selfmentioning

confidence: 99%

Self-extracted corn-stalk cellulose/epoxy resin composites

Lou

Jiang

Yan

et al. 2022

Sci Rep

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“…As could be seen from Fig. 8(b), a phase interface was formed between CSC and epoxy resin matrix, which main functions were to transfer stress, change the direction of the applied force on the interface to disperse it, stop and inhibit the growth of the cracks and absorb the impact energy [17]. It showed that CSC could dissipate effectively the external stress on the composites and improve the toughness of the composites, which was consistent with the results of mechanical properties.…”

Section: Sem Analysismentioning

confidence: 99%

“…The common method of toughening epoxy resin is to add toughening agent, such as nano particles [5][6][7], liquid crystal polymer [8], ber [9,10], polymer [11,12], Lignin [13], block polymer [14,15] and hyperbranched polymer [16] etc., which can effectively improve the brittleness of epoxy resin, and broaden its application in the industrial eld. Biomass toughened epoxy resin has become a research hotspot due to its green and sustainable development [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Self-extracted corn-stalk cellulose/epoxy resin composites

Lou¹,

Jiang²,

Yan³

et al. 2022

Preprint

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In order to make full use of crop waste stalk, corn-stalk cellulose (CSC) was extracted by acid-base method and used as modifier of epoxy resin (E51) to prepare the self-extracted corn-stalk cellulose / epoxy resin composites (CSCEC). Thermogravimetry (TG) analysis, dynamic mechanical analysis (DMA), morphology analysis by scanning electron microscope (SEM), the mechanical properties by electronic universal testing machine and impact testing machine were used for characterization and analysis. The experimental results showed that when the CSC content was 20 wt%, the impact strength of the composite was 2.50 kJ /m2, which was 127.2% higher than that of pure epoxy resin. Meanwhile, the tensile and bending strength were slightly increased, and the storage modulus (E') of epoxy resin was also slightly increased, indicating that the addition of CSC could toughen the epoxy resin. When the CSC content was 20 wt%, the Tg of epoxy resin obtained by DMA was the lowest, 167.4 ℃, which decreased by 11.3 ℃ compared with that of pure epoxy resin.

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“…(2), it absolutely was found that the precise peaks associated with methylated carboxy at the range of 3448.39 cm-1 and 1579 cm -1 , are attributed to the hydroxyl and carboxylate (asymmetric tensile) groups, respectively [31]. The 1513 cm -1 and 1452 cm -1 tensile bond belong to the aromatic loops, and also the peaks appearing at the wavelength of 1739.19 cm -1 are attributed to the C=O of the carbonyl groups in graphene oxide.…”

Section: Properties Of Nano Adsorbentmentioning

confidence: 99%

Synthesis of Dendritic Magnetic Graphene Oxide By Radical Polymerization As Adsorbent For Rapid Removal of Malachite Green From Aqueous Solutions

Razavikia

Faramarzi

Parsa

et al. 2021

Preprint

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Disposal of Malachite green containing sewage from related industries has resulted in global concern. Thus, removing Malachite green from aqueous solutions is highly significant and necessary. during this study, magnetic graphene oxide coated with dendrimer (G (1) -MGO-chitosan) was prepared successfully and applied for removing cationic malachite green in various conditions. The properties of the synthesized adsorbent (G (1) -MGO-chitosan) were evaluated using XRD, FTIR, BET, FESEM, TEM and TGA. Furthermore, the effect of different parameters on malachite green removal was studied. The results indicated that at pH = 8, temperature of 40 °C, initial concentration 600 µg mL-1 and contact time 10 min were obtained as optimal values for removing malachite green with nanoadsorbent (G (1) -MGO-chitosan) with maximum adsorption capacity of malachite green was obtained at 38.71 µg mg-1. The high correlation coefficient (R2 = 0.9947) for the Freundlich model confirmed that the Freundlich model is appropriate for fitting laboratory data. Based on the model, Temkin heat adsorption for malachite green j mol-1 is B = 8.1447, indicating that the process of dye adsorption with Nano adsorbent is of physical type. Based on the results of fitting the kinetic models of Malachite green adsorption by Nano adsorbent, Hu and McKay’s model with higher correlation coefficient (R2 = 0.9994) is more consistent with experimental data than other models. Since no large decrease is observed in Malachite green removal in seven consecutive recovery cycles, thus Nano adsorbent has a high stability and can be used several times.

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Preparation of carboxylated lignin-based epoxy resin with excellent mechanical properties

Cited by 34 publications

References 41 publications

Self-extracted corn-stalk cellulose/epoxy resin composites

Self-extracted corn-stalk cellulose/epoxy resin composites

Self-extracted corn-stalk cellulose/epoxy resin composites

Synthesis of Dendritic Magnetic Graphene Oxide By Radical Polymerization As Adsorbent For Rapid Removal of Malachite Green From Aqueous Solutions

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