Enhanced properties of aryl diazonium salt-functionalized graphene/poly(vinyl alcohol) composites

被引：0
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作者：
Yu, Dong Sheng [1 ,2 ]
Kuila, Tapas [3 ]
Kim, Nam Hoon [1 ]
Lee, Joong Hee [1 ,4 ]
机构：
[1] [1,Yu, Dong Sheng
[2] Kuila, Tapas
[3] Kim, Nam Hoon
[4] 1,Lee, Joong Hee
来源：
Lee, J.H. (jhl@jbnu.ac.kr) | 1600年 / Elsevier B.V., Netherlands卷 / 245期
关键词：
The impediments to incorporating graphene into poly(vinyl alcohol) (PVA) are intrinsically inhomogeneous dispersion and agglomeration during mixing. Two types of PVA composites containing reduced graphene oxide (r-GO) and a novel aryl diazonium salt functionalized graphene (ADS-G) as nanofiller were successfully prepared by a simple solution casting. Fourier transform infrared spectroscopy showed the reduction of graphene oxide (GO); chemical functionalization of graphene by ADS; and formation of graphene-based PVA composites. Field emission scanning electron microscopy and transmission electron microscopy image analyses indicated that r-GO and ADS-G were fully incorporated into the PVA matrix. ADS-G formed better dispersion than r-GO and acted as good reinforcing filler to enhance the mechanical and dielectric properties of PVA. The tensile strength and modulus of the resulting PVA/ADS-G composites were improved by about 181% and 198%; respectively. In contrast; the tensile strength and modulus of PVA/r-GO composites were enhanced by 125% and 160%; respectively. The electrical conductivities were increased by ~107 orders of magnitude in the composites with only 1.0wt.% of filler loadings as compared to that of neat PVA. PVA/ADS-G composites showed greater improvement in thermal stability than PVA/r-GO composites; as evidenced from thermogravimetric and differential scanning calorimetric analyses. These results demonstrated that the ADS-G acted as good reinforcing filler compared to r-GO when using PVA as a polymer matrix. © 2014 Elsevier B.V;
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