The Preparation And Characterization Of Graphene And Fullerene/Rubber Nanocomposites

Nanocarbon is defined as a certern kind of carbon materials having specific phyisical and chemical properties that closely related to their nanoscale features. Therefore, nanocarbon materials/polymer nanocomposites have been attracting great interests of industry and researchers in recent years. In this paper, the preparation and characterization of nanocarbon materials/rubber nanocomposites are explored.(1)Graphite oxide was successfully prepared by improved hummers method, and the C/O ratio of graphite oxide was about 2.1. Then the graphite oxide was exfoliated to graphene oxide (GO) by ultrasonication in THF and co-coagulated with SSBR to abtain GO/SSBR nanocomposite by solution method. But the poor dispersibiliy of GO in THF and the weak interfacial action between GO and SSBR matrix leading to an agglomeration of GO in SSBR matrix which is not good for stress propagation. So directly using GO as a filler to enhance SSBR has limited effect.(2)1-dodecanamine modified GO (DDA-GO) was obtained by chemical reaction between GO and DDA. The dispersibility of DDA-GO is much better than GO in THE And then the DDA-GO/SSBR nanocomposites were also successfully achieved by solution method. When 4wt% DDA-GO was added to SSBR, the tensile strength of DDA-GO/SSBR nanocomposite is improved from 2.6 MPa to 6.6 MPa. And the 300% modulus and the elongation at break increase 92% and 45% respectively. So after modification the reinforcement effect of DDA-GO is much better than GO.(3)The C60/NR nanocomposites were successfully prepared. C60 has an ability to capture the formation of free radicals and is expected to prevent the aging process of NR int this way. In this study, the mechanical properties before and after aging of C60/NR nanocomposites were compared to explore the anti-aging performance. Through a series characterization methods, C60 was found to react with the free radicals generated by S in the curing process increasing the crosslink density of nanocomposites. The ratio of Magi100/M100 and ratio of Magi300/M300 were used to indicate the anti-aging performance of C60/NR nanocomposites. The ratio of Magi100/M100 and ratio of Magi300/M300 both decreased with the increase of C6o’s weight which is better than the pure NR and the NR added with antiager.