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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.


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TEM images of a GO, b ZHS nanoparticles, c ZHS/GO nanohybrids. The TEM results show that ZHS nanoparticles successfully bond on the surface of GO. Moreover, the distribution of ZHS nanoparticles on GO nanosheets is uniform and has no obvious aggregation or free nanoparticles are observed
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Fig3: TEM images of a GO, b ZHS nanoparticles, c ZHS/GO nanohybrids. The TEM results show that ZHS nanoparticles successfully bond on the surface of GO. Moreover, the distribution of ZHS nanoparticles on GO nanosheets is uniform and has no obvious aggregation or free nanoparticles are observed

Mentions: The morphology and microstructure of ZHS/GO nanohybirds are shown in Fig. 3. As can be observed from Fig. 3a, GO nanosheets are highly transparent with folding at the edges, suggesting a very small thickness. Because of their high specific area, GO nanosheets aggregated and formed a stacked graphitic structure when their dispersion solvent was completely evaporated. It is clearly shown in Fig. 3b that the diameter of pristine ZHS nanoparticles is in the range of 40–50 nm. The TEM image of ZHS/GO nanocomposites (Fig. 3c) clearly illustrates that ZHS nanoparticles are distributed on the surface of GO nanosheets. The distribution of ZHS nanoparticles on GO nanosheets is uniform and has no obvious aggregation or free nanoparticles are detected. Furthermore, the TEM picture shows that the diameter of the ZHS nanoparticles is in the range of 50–60 nm, this may be because GO nanosheets facilitate the nucleation of ZHS to lead to a bigger diameter.Fig. 3


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)

TEM images of a GO, b ZHS nanoparticles, c ZHS/GO nanohybrids. The TEM results show that ZHS nanoparticles successfully bond on the surface of GO. Moreover, the distribution of ZHS nanoparticles on GO nanosheets is uniform and has no obvious aggregation or free nanoparticles are observed
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig3: TEM images of a GO, b ZHS nanoparticles, c ZHS/GO nanohybrids. The TEM results show that ZHS nanoparticles successfully bond on the surface of GO. Moreover, the distribution of ZHS nanoparticles on GO nanosheets is uniform and has no obvious aggregation or free nanoparticles are observed
Mentions: The morphology and microstructure of ZHS/GO nanohybirds are shown in Fig. 3. As can be observed from Fig. 3a, GO nanosheets are highly transparent with folding at the edges, suggesting a very small thickness. Because of their high specific area, GO nanosheets aggregated and formed a stacked graphitic structure when their dispersion solvent was completely evaporated. It is clearly shown in Fig. 3b that the diameter of pristine ZHS nanoparticles is in the range of 40–50 nm. The TEM image of ZHS/GO nanocomposites (Fig. 3c) clearly illustrates that ZHS nanoparticles are distributed on the surface of GO nanosheets. The distribution of ZHS nanoparticles on GO nanosheets is uniform and has no obvious aggregation or free nanoparticles are detected. Furthermore, the TEM picture shows that the diameter of the ZHS nanoparticles is in the range of 50–60 nm, this may be because GO nanosheets facilitate the nucleation of ZHS to lead to a bigger diameter.Fig. 3

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