Grafting of nano-TiO2 onto flax fibers and the enhancement of the mechanical properties of the flax fiber and flax fiber/epoxy composite

Wang, Hongguang; Xian, Guijun; Li, Hui

doi:10.1016/j.compositesa.2015.05.027

Cited by 94 publications

(52 citation statements)

References 34 publications

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“…It can be seen that a suitable amount of filler can properly improve the impact strength of the epoxy resin. Unfortunately, the impact strength of the composites decreases when the amount of filler is further increased, which is due to the fact that excessive filler cannot be well dispersed in the matrix and agglomerates to clusters . The values of the mechanical properties are also summarized in Table .…”

Section: Resultsmentioning

confidence: 99%

Physico‐mechanical properties of nano‐polystyrene‐decorated graphene oxide–epoxy composites

Khobragade

Hansora

Naik

et al. 2017

Polymer International

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Nano‐polystyrene (nPS)‐decorated graphene oxide (GO) hybrid nanostructures were successfully synthesized using stepwise microemulsion polymerization, and characterized using Fourier transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), field‐emission scanning electron microscopy and transmission electron microscopy. XRD and FTIR spectra revealed the existence of a strong interaction between nPS and GO, which implied that the polymer chains were successfully grafted onto the surface of the GO. The nPS‐decorated GO hybrid nanostructures were compounded with epoxy using a hand lay‐up technique, and the effect of the nPS‐decorated GO on the mechanical, thermal and surface morphological properties of the epoxy matrix was investigated using a universal tensile machine, Izod impact tester, thermogravimetric analysis and contact angle measurements with a goniometer. It was observed that in the epoxy matrix, GO improved the compatibility. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Physico‐mechanical properties of nano‐polystyrene‐decorated graphene oxide–epoxy composites

Khobragade

Hansora

Naik

et al. 2017

Polymer International

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“…This led to an increase in interfacial shear strength of the TiO 2 grafted flax fiber/epoxy composite compared to the control ones. The study reported an increase of 23% in the tensile strength of the flax fibers which may be due to the modification of the fibers cross-sectional area or the grafting of TiO 2 particles on the fibers surface [29].…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Physical and mechanical properties of PLA composites reinforced by TiO 2 grafted flax fibers

et al. 2016

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“…After reinforcement with flax fiber sheets grafted with nano-TiO 2 , the shear capacity of the RC beams is considerably improved to 653 kN, which is 72.8% higher than that of the unreinforced RC beams. Meanwhile, the mid-range deflection of the beam reached 14.6 mm, which is 75.9% higher than that of the unreinforced RC beams.surface morphology of the flax fiber sheets, but it can also transform the hydrophilic surface into a lipophilic surface, which improves the compatibility of the flax fiber monofilament with epoxy resin [15,16]. After grafting, a nanoparticle layer structure is produced on the surface of the flax fiber.…”

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confidence: 97%

“…This can create new covalent bonds, such as -Ti-O-Si-and -Si-O-C-. The degree of defects on the surface of the flax fiber sheets is reduced, and a nano-reinforced epoxy resin composite layer is formed between the flax fiber sheets and the epoxy resin, which fully exerts the reinforcing effect of the nano-TiO 2 [15,17].In this study, the shear capacity, bearing characteristics, and failure modes of reinforced concrete (RC) beams and RC beams strengthened with ordinary flax fiber sheets, unidirectional basalt fiber sheets, and flax fiber sheets grafted with nano-TiO 2 were analyzed and compared. An equation for the shear bearing capacity of RC beams strengthened with flax fiber sheets was also proposed.…”

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Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO2

Wang

Xian

2020

Materials

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Flax fiber sheets provide the advantages of high specific strength, a short growth cycle, environmental friendliness, wide availability, and low cost. Therefore, in this study, the shear capacities of reinforced concrete (RC) beams strengthened with ordinary flax fiber sheets, flax fiber sheets grafted with nano-TiO 2 , and unidirectional basalt fiber sheets were compared. The bearing characteristics and failure modes of RC beams strengthened with flax fiber sheets were investigated. The results showed that after reinforcement with flax fiber sheets, the bearing capacity and mid-span deflection of the RC beams are considerably improved, and the reinforcing effect of flax fiber sheets grafted with nano-TiO 2 is greater than that of unmodified flax fiber sheets. After reinforcement with flax fiber sheets grafted with nano-TiO 2 , the shear capacity of the RC beams is considerably improved to 653 kN, which is 72.8% higher than that of the unreinforced RC beams. Meanwhile, the mid-range deflection of the beam reached 14.6 mm, which is 75.9% higher than that of the unreinforced RC beams.surface morphology of the flax fiber sheets, but it can also transform the hydrophilic surface into a lipophilic surface, which improves the compatibility of the flax fiber monofilament with epoxy resin [15,16]. After grafting, a nanoparticle layer structure is produced on the surface of the flax fiber. This can create new covalent bonds, such as -Ti-O-Si-and -Si-O-C-. The degree of defects on the surface of the flax fiber sheets is reduced, and a nano-reinforced epoxy resin composite layer is formed between the flax fiber sheets and the epoxy resin, which fully exerts the reinforcing effect of the nano-TiO 2 [15,17].In this study, the shear capacity, bearing characteristics, and failure modes of reinforced concrete (RC) beams and RC beams strengthened with ordinary flax fiber sheets, unidirectional basalt fiber sheets, and flax fiber sheets grafted with nano-TiO 2 were analyzed and compared. An equation for the shear bearing capacity of RC beams strengthened with flax fiber sheets was also proposed. Materials and Methods Materials and ReagentsThe RC beam was cast with commercial concrete. The concrete grade was C30, water-cement ratio was 0.42, and ratio of cement:water:sand:gravel was 360:151:632:1282 by weight. The cement was Swan brand P.O grade 42.5 ordinary Portland cement, produced by the Harbin Cement Factory of the Jilin Yatai Group, China. The maximum particle size of the coarse aggregate was approximately 25 mm. The measured concrete slump was 43 mm [18]. After pouring was completed, the RC beam was continuously watered at room temperature for 7 days, after which it was removed from the mold and rinsed until 28 days. According to the requirements in the standards for the test of mechanical properties of ordinary concrete (GB/T 50081-2011) [18], the compressive strength of the concrete cube (100 mm × 100 mm) was measured to be 38.2 ± 0.3 MPa.The vertical, structural, and erecting steel rebars were HRB400 grade ordinary hot ro...

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Grafting of nano-TiO2 onto flax fibers and the enhancement of the mechanical properties of the flax fiber and flax fiber/epoxy composite

Cited by 94 publications

References 34 publications

Physico‐mechanical properties of nano‐polystyrene‐decorated graphene oxide–epoxy composites

Physico‐mechanical properties of nano‐polystyrene‐decorated graphene oxide–epoxy composites

Physical and mechanical properties of PLA composites reinforced by TiO 2 grafted flax fibers

Shear Capacity of RC Beams Strengthened with Flax Fiber Sheets Grafted with Nano-TiO2

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