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Preparation of zinc hydroxystannate-decorated graphene oxide nanohybrids and their synergistic reinforcement on reducing fire hazards of flexible poly (vinyl chloride).

Gao T, Chen L, Li Z, Yu L, Wu Z, Zhang Z - Nanoscale Res Lett (2016)

Bottom Line: A novel flame retardant, zinc hydroxystannate-decorated graphene oxide (ZHS/GO) nanohybrid, was successfully prepared and well characterized.In addition, the addition of ZHS/GO nanohybrids decreased the smoke products and increased the tensile strength of PVC.Above-excellent flame-retardant properties are generally attributed to the synergistic effect of GO and ZHS, containing good dispersion of ZHS/GO in PVC matrix, the physical barrier of GO, and the catalytic char function of ZHS.

View Article: PubMed Central - PubMed

Affiliation: National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng, 475004, People's Republic of China.

ABSTRACT
A novel flame retardant, zinc hydroxystannate-decorated graphene oxide (ZHS/GO) nanohybrid, was successfully prepared and well characterized. Herein, the ZHS nanoparticles could not only enhance the flame retardancy of GO with the synergistic flame-retardant effect of ZHS but also prevent the restack of GO to improve the mechanical properties of poly (vinyl chloride) (PVC) matrix. The structure characterization showed ZHS nanoparticles were bonded onto the surface of GO nanosheets and the ZHS nanoparticles were well distributed on the surface of GO. Subsequently, resulting ZHS/GO was introduced into flexible PVC and fire hazards and mechanical properties of PVC nanocomposites were investigated. Compared to neat PVC, thermogravimetric analysis exhibited that the addition of ZHS/GO into PVC matrix led to an improvement of the charring amount and thermal stability of char residue. Moreover, the incorporation of 5 wt.% ZHS/GO imparted excellent flame retardancy to flexible PVC, as shown by increased limiting oxygen index, reduced peak heat release rate, and total heat release tested by an oxygen index meter and a cone calorimeter, respectively. In addition, the addition of ZHS/GO nanohybrids decreased the smoke products and increased the tensile strength of PVC. Above-excellent flame-retardant properties are generally attributed to the synergistic effect of GO and ZHS, containing good dispersion of ZHS/GO in PVC matrix, the physical barrier of GO, and the catalytic char function of ZHS.

No MeSH data available.


Related in: MedlinePlus

Storage modulus curves of PVC and its nanocomposites as a function of temperature, showing ZHS/GO/PVC nanocomposite has the high-storage modulus, which is attributed to the synergistic reinforcement effect of ZHS/GO nanohybrids in polymer matrix
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Fig11: Storage modulus curves of PVC and its nanocomposites as a function of temperature, showing ZHS/GO/PVC nanocomposite has the high-storage modulus, which is attributed to the synergistic reinforcement effect of ZHS/GO nanohybrids in polymer matrix

Mentions: The values of tensile strength of PVC and its nanocomposites with different additives are presented in Table 1. Pure PVC shows a high tensile strength of 12.9 MPa. When ZHS and GO are added, the tensile strength at break of composite is increased to 13.4 and 13.2 MPa, respectively. In addition, the tensile strength at break of ZHS/GO/PVC nanocomposite increases from 12.9 to 14.3 MPa. The increase of the tensile strength could be interpreted on the basis of following factors: the strong interfacial adhesion and good dispersion of ZHS/GO in the PVC, resulting in effective load transfer from the polymer to GO [28]; the enhancement of crosslink density is due to the hydroxyl on the surface of nanoparticles [29]; and the viscous energy absorption and crack deflection [30]. Especially, ZHS nanoparticles could prevent the restack of GO and GO could also ensure ZHS nanoparticles remain well dispersed in PVC, thereby enhancing the tensile strength. In addition, the ternary structure could absorb much more energy than the binary nanocomposites [31, 32], namely, the effective synergistic strengthening in ZHS/GO/PVC achieves the high mechanical properties, superior to ZHS/PVC and GO/PVC nanocomposites (Fig. 11).Fig. 11


Preparation of zinc hydroxystannate-decorated graphene oxide nanohybrids and their synergistic reinforcement on reducing fire hazards of flexible poly (vinyl chloride).

Gao T, Chen L, Li Z, Yu L, Wu Z, Zhang Z - Nanoscale Res Lett (2016)

Storage modulus curves of PVC and its nanocomposites as a function of temperature, showing ZHS/GO/PVC nanocomposite has the high-storage modulus, which is attributed to the synergistic reinforcement effect of ZHS/GO nanohybrids in polymer matrix
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4829567&req=5

Fig11: Storage modulus curves of PVC and its nanocomposites as a function of temperature, showing ZHS/GO/PVC nanocomposite has the high-storage modulus, which is attributed to the synergistic reinforcement effect of ZHS/GO nanohybrids in polymer matrix
Mentions: The values of tensile strength of PVC and its nanocomposites with different additives are presented in Table 1. Pure PVC shows a high tensile strength of 12.9 MPa. When ZHS and GO are added, the tensile strength at break of composite is increased to 13.4 and 13.2 MPa, respectively. In addition, the tensile strength at break of ZHS/GO/PVC nanocomposite increases from 12.9 to 14.3 MPa. The increase of the tensile strength could be interpreted on the basis of following factors: the strong interfacial adhesion and good dispersion of ZHS/GO in the PVC, resulting in effective load transfer from the polymer to GO [28]; the enhancement of crosslink density is due to the hydroxyl on the surface of nanoparticles [29]; and the viscous energy absorption and crack deflection [30]. Especially, ZHS nanoparticles could prevent the restack of GO and GO could also ensure ZHS nanoparticles remain well dispersed in PVC, thereby enhancing the tensile strength. In addition, the ternary structure could absorb much more energy than the binary nanocomposites [31, 32], namely, the effective synergistic strengthening in ZHS/GO/PVC achieves the high mechanical properties, superior to ZHS/PVC and GO/PVC nanocomposites (Fig. 11).Fig. 11

Bottom Line: A novel flame retardant, zinc hydroxystannate-decorated graphene oxide (ZHS/GO) nanohybrid, was successfully prepared and well characterized.In addition, the addition of ZHS/GO nanohybrids decreased the smoke products and increased the tensile strength of PVC.Above-excellent flame-retardant properties are generally attributed to the synergistic effect of GO and ZHS, containing good dispersion of ZHS/GO in PVC matrix, the physical barrier of GO, and the catalytic char function of ZHS.

View Article: PubMed Central - PubMed

Affiliation: National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng, 475004, People's Republic of China.

ABSTRACT
A novel flame retardant, zinc hydroxystannate-decorated graphene oxide (ZHS/GO) nanohybrid, was successfully prepared and well characterized. Herein, the ZHS nanoparticles could not only enhance the flame retardancy of GO with the synergistic flame-retardant effect of ZHS but also prevent the restack of GO to improve the mechanical properties of poly (vinyl chloride) (PVC) matrix. The structure characterization showed ZHS nanoparticles were bonded onto the surface of GO nanosheets and the ZHS nanoparticles were well distributed on the surface of GO. Subsequently, resulting ZHS/GO was introduced into flexible PVC and fire hazards and mechanical properties of PVC nanocomposites were investigated. Compared to neat PVC, thermogravimetric analysis exhibited that the addition of ZHS/GO into PVC matrix led to an improvement of the charring amount and thermal stability of char residue. Moreover, the incorporation of 5 wt.% ZHS/GO imparted excellent flame retardancy to flexible PVC, as shown by increased limiting oxygen index, reduced peak heat release rate, and total heat release tested by an oxygen index meter and a cone calorimeter, respectively. In addition, the addition of ZHS/GO nanohybrids decreased the smoke products and increased the tensile strength of PVC. Above-excellent flame-retardant properties are generally attributed to the synergistic effect of GO and ZHS, containing good dispersion of ZHS/GO in PVC matrix, the physical barrier of GO, and the catalytic char function of ZHS.

No MeSH data available.


Related in: MedlinePlus