With silica firstly modified by 3-aminopropyl-triethoxysilane (APES), graphene oxide (GO) was prepared by modified Hummer’s method. APES-silica/GO (AsGO) hybrids were fabricated through hydrogen bond to reduce the polarity of silica and GO and increase the compatibility between natural rubber (NR) and AsGO. Subsequently, AsGO was incorporated into NR latex. The interaction between GO and silica in AsGO was characterized by X-ray diffraction, Raman, and Zeta potential. It was confirmed by transmission electron microscopy that the silica was uniformly dispersed on the surface of the GO. The filler–rubber interfacial interaction was thoroughly investigated. The amount of constrained region was quantified through differential scanning calorimetry results, and it showed that the high volume fraction of constrained region is responsible for the strong interfacial interaction. Besides, the mechanical performance, dynamic property, and electrical and thermal conductivity of NR-AsGx were studied. The results showed that the overall performance of NR-AsGx has an optimum value when the GO loading is 1.5 phr, which is due to the good filler dispersion and strong interface interaction.
GeimAKNovoselovKS. The rise of graphene. Nat Mater2007; 6(3): 183–191.
2.
NovoselovKSMorozovSVMohinddinTMG, et al.Electronic properties of graphene. Phys Status Solidi B2007; 244(11): 4106–4111.
3.
LeeCWeiXKysarJW, et al.Measurement of the elastic properties and intrinsic strength of monolayer graphene. Science2008; 321(5887): 385–388.
4.
BalandinAAGhoshSBaoW, et al.Superior thermal conductivity of single-layer graphene. Nano Lett2008; 8(3): 902–907.
5.
KuillaTBhadraSYaoD, et al.Recent advances in graphene based polymer composites. Prog Polym Sci2010; 35(11): 1350–1375.
6.
MeyerJCGeimAKKatsnelsonMI, et al.The structure of suspended graphene sheets. Nature2007; 446(7131): 60–63.
7.
DreyerDRParkSBielawskiCW, et al.The chemistry of graphene oxide. Chem Soc Rev. 2009; 39(1): 228–230.
8.
ZengYZhouYKongL, et al.A novel composite of SiO2-coated graphene oxide and molecularly imprinted polymers for electrochemical sensing dopamine. Biosens Bioelectron2013; 45(1): 25–33.
9.
DengSTjoaVFanHM, et al.Reduced graphene oxide conjugated Cu2O nanowire mesocrystals for high-performance NO2 gas sensor. J Am Chem Soc2012; 134(10): 4905–4917.
10.
ChenYLHuZAChangYQ, et al.Zinc oxide/reduced graphene oxide composites and electrochemical capacitance enhanced by homogeneous incorporation of reduced graphene oxide sheets in zinc oxide matrix. J Phys Chem C2013; 115(5): 2563–2571.
11.
LiXQiWMeiD, et al.Functionalized graphene sheets as molecular templates for controlled nucleation and self-assembly of metal oxide-graphene nanocomposites. Adv Mater2012; 24(37): 5136–5141.
12.
RamezanzadehBHaeriZRamezanzadehM, et al.A facile route of making silica nanoparticles-covered graphene oxide nanohybrids (SiO2–GO); fabrication of SiO2-GO/epoxy composite coating with superior barrier and corrosion protection performance. Chem Eng J2016; 303(16): 511–528.
13.
ZhangSBZhengLLiuDH, et al.Improved mechanical and fatigue properties of graphene oxide/silica/SBR composites. RSC Adv2017; 7: 40813–40818.
14.
LinYLiuSPengJ, et al.The filler–rubber interface and reinforcement in styrene butadiene rubber composites with graphene/silica hybrids: a quantitative correlation with the constrained region. Compos Part A-Appl Sci2016; 86: 19–30.
15.
MaoYWenSChenY, et al.High performance graphene oxide based rubber composites. Sci Rep-UK2013; 3: 1–7.
16.
LiuZZhangHSongS, et al.Improving thermal conductivity of styrene-butadiene rubber composites by incorporating mesoporous silica@solvothermal reduced graphene oxide hybrid nanosheets with low graphene content. Compos Sci Technol2017; 150: 174–180.
17.
FuJZhangMLiuL, et al.Layer-by-layer electrostatic self-assembly silica/graphene oxide onto carbon fiber surface for enhance interfacial strength of epoxy composites. Mater Lett2018.
18.
PottsJRShankarODuL, et al.Processing–morphology–property relationships and composite theory analysis of reduced graphene oxide/natural rubber nanocomposites. Macromolecules2012; 45(15): 6045–6055.
19.
ZhanYWuJXiaH, et al.Dispersion and exfoliation of graphene in rubber by an ultrasonically-assisted latex mixing and in situ reduction process. Macromol Mater Eng2011; 296(7): 590–602.
20.
HernanNMBernalMDMVerdejoR, et al.Overall performance of natural rubber/graphene nanocomposites. Compos Sci Technol2012; 73(23): 40–46.
21.
WuJRHuangGSHuiLI. Enhanced mechanical and gas barrier properties of rubber nanocomposites with surface functionalized graphene oxide at low content. Polymer2013; 54(7): 1930–1937.
22.
CaoLTridibKSZongCZ, et al.Synergistic reinforcement of silanized silica-graphene oxide hybrid in natural rubber for tire-tread fabrication: a latex based facile approach. Compos Part B-Eng. DOI: 10.1016/j.compositesb.2019.01.024.
23.
LiuZZhangY. Enhanced mechanical and thermal properties of SBR composites by introducing graphene oxide nanosheets decorated with silica particles. Compos Part A-Appl Sci2012; 102: 236–242.
24.
LowFWLaiCWAbdHSB, et al.High yield preparation of graphene oxide film using improved hummer’s technique for current-voltage characteristic. Adv Mater Res2015; 1109: 385–389.
25.
FrankbergEJGeorgeLEfimovA, et al.Measuring synthesis yield in graphene oxide synthesis by modified hummers method. Fuller Nanotub Car N2015; 23(9): 755–759.
26.
PengZKongLXLiSD, et al.Self-assembled natural rubber/silica nanocomposites: its preparation and characterization. Compos Sci Technol2007; 67(15–16): 3130–3139.
27.
LinYZhuCFangG, et al.Synthesis and properties of microencapsulated stearic acid/silica composites with graphene oxide for improving thermal conductivity as novel solar thermal storage materials. Sol Energ Mat Sol C2019; 189: 197–205.
28.
LiuZZhangHSongS, et al.Improving thermal conductivity of styrene-butadiene rubber composites by incorporating mesoporous silica@solvothermal reduced graphene oxide hybrid nanosheets with low graphene content. Compos Sci Technol2017; 150: 174–180.
29.
HuangLZhuPLiG, et al.Core–shell SiO2@RGO hybrids for epoxy composites with low percolation threshold and enhanced thermomechanical properties. J Mater Chem A2014; 2(43): 18246–18255.
30.
MatherPTJeonHGHanCD, et al.Morphological and rheological responses to shear start-up and flow reversal of thermotropic liquid-crystalline polymers. Macromolecules2000; 33(20): 7594–7608.
31.
JiangTKuilaTKimNH, et al.Enhanced mechanical properties of silanized silica nanoparticle attached graphene oxide/epoxy composites. Compos Sci Technol2013; 79(5): 115–125.
32.
FengWWangYChenJ, et al.Reduced graphene oxide decorated with in-situ growing ZnO nanocrystals: facile synthesis and enhanced microwave absorption properties. Carbon2016; 108: 52–60.
33.
RuggeroneRGeiserVVaccheS, et al.Immobilized polymer fraction in hyperbranched polymer/silica nanocomposite suspensions. Macromoleculer2010; 43(24): 10490–10497.
34.
SargsyanATonoyanADavtyanS, et al.The amount of immobilized polymer in PMMA SiO2 nanocomposites determined from calorimetric data. Eur Polym J2007; 43(8): 3113–3127.
35.
LeiYTangZZhuL, et al.Functional thiol ionic liquids as novel interfacial modifiers in SBR/HNTs composites. Polymer2011; 52(5): 1337–1344.
36.
LeiYTangZZhuL, et al.Thiol-containing ionic liquid for the modification of styrene–butadiene rubber/silica composites. J Appl Polym Sci2011; 123(2): 1252–1260.
37.
XiaJChenFLiJ, et al.Measurement of the quantum capacitance of graphene. Nat Nano2009; 4(8): 505–509.
38.
TianMZhangJZhangL, et al.Graphene encapsulated rubber latex composites with high dielectric constant, low dielectric loss and low percolation threshold. J Colloid Interface Sci2014; 430: 249–256.
