In situ fabrication of graphene oxide supported nano silica for the preparation of rubber composites with high mechanical strength and thermal conductivity

Abstract

Graphene oxide (GO) supported nano silica (SiO2), SiO2‐GO, was synthesized via in situ hydrolysis and condensation of tetraethylorthosilicate (TEOS) on GO surface. It was proved that SiO2 nanoparticles with an average particle diameter of ca. 30 nm were covalently grafted through Si—O—C bonds and evenly distributed on the surface of GO sheets. Subsequently, SiO2—GO was incorporated into styrene‐butadiene rubber (SBR) latex to prepare elastomer composite (SBR/SiO2‐GO). As expected, because of the unique architecture of SiO2‐GO, the irreversible agglomeration of SiO2 or GO was eliminated and the nanohybrid was uniformly dispersed in the rubber composites. In addition, the interfacial interaction between SiO2‐GO and rubber was also significantly improved. Consequently, SBR/SiO2‐GO composites showed much higher mechanical strength than SBR composites containing equal amount of GO or physical mixture of SiO2/GO. For example, when the filler content is 6 phr, the tensile strength of SBR/SiO2‐GO composites is further increased by 21% and 94% compared to those of SBR/GO and SBR/SiO2/GO composites, respectively. Moreover, SiO2‐GO nano hybrid can also endow rubber composites with better thermal conductivity than the physical mixture of SiO2 and GO. Potentially, this unique hybrid architecture synthesized in this work may provide a new method for the preparation of high‐performance elastomer composites. POLYM. COMPOS., 40:E1633–E1641, 2019. © 2018 Society of Plastics Engineers

Graphene-Based Hybrid Fillers for Rubber Composites

“…This makes rubber composites more suitable for the requirements of green production. Therefore, graphene (graphene derivatives)/silica hybrid filler-reinforced rubber has been widely studied in recent years [ 58 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 ].…”

Enhancing mechanical performance and wet‐skid resistance of emulsion styrene butadiene rubber/natural rubber latex composites via in‐situ hybridization of silanized graphene oxide and silica

“…Hybrid fillers can also be prepared by chemical methods such as thiol-ene click reaction. [24][25][26] This chemical grafting method connects SiO 2 and GO by chemical bonds, and the binding effect between particles was strong. However, due to the coverage of SiO 2 on the surface of GO through covalent bonds, the number of oxygen-containing functional groups on the surface of GO was reduced, resulting in the weakened interaction between the hybrid filler and the rubber matrix.…”

Effects of Silicon Dioxide/Graphene Oxide Hybrid Modification on Curing Kinetics of Epoxy Resin

“…Great efforts have been made in this area, and many elegant works can be seen. Zhang et al 19 prepared hybridized GO-SiO 2 nanoparticles by the method of physical blending, and reported that the hybridization of GO-SiO 2 was the determining factor for the reinforcement of the mechanical properties and elasticity of the NBR; Dong et al 20 With respect to the modification of EP, current reports mainly focus on the enhancement of mechanical performance and corrosion properties. Damian et al 3 reported a novel strategy, which uses the modified carbodiimide coupling mechanism between GO and SiO 2 , they also compared it with a functionalization method, which creates physical interactions through ultrasonication.…”

“…Great efforts have been made in this area, and many elegant works can be seen. Zhang et al 19 prepared hybridized GO-SiO 2 nanoparticles by the method of physical blending, and reported that the hybridization of GO-SiO 2 was the determining factor for the reinforcement of the mechanical properties and elasticity of the NBR; Dong et al 20 synthesized SiO 2 -GO via in situ hydrolysis and condensation of tetraethylorthosilicate (TEOS) on the GO surface, and then they incorporated SiO 2 -GO into styrene-butadiene rubber (SBR) latex to prepare an elastomer composite (SBR/SiO 2 -GO); Dong et al 14 reported a novel SiO 2 –GO/acrylic resin nanocomposite. They prepared the nanohybrids of GO-SiO 2 by surface modification of GO by the hydrolysis of TEOS; Haddadi et al 21 used the modified Hummer technique for the preparation of GO nanosheets, and then GO-SiO 2 nanosheets were synthesized via the sol–gel method.…”