Graphene Oxide with Controlled Content of Oxygen Groups as a Filler for Polymer Composites Used for Infrared Radiation Shielding

Abstract

Infrared (IR) shielding materials are commonly used for different applications, such as smart windows or optical filters. Infrared radiation is responsible for about 50% of the energy coming from the sun. During a hot summer or cold winter a lot of energy is needed to keep the optimal temperature inside buildings and means of transport. To reduce the heat transmission and save energy IR shielding materials can be used as coatings made of polymer composites. Graphene oxide (GO) and its reduced forms have interesting IR absorption properties and might be used as a filler in a polymer matrix for IR shielding applications. Graphene oxide can be reduced by different methods. Depending on the reduction method reduced graphene oxide (rGO) with a different content of oxygen can be obtained exhibiting different properties. In this work we propose new polymer nanocomposites with poly(vinyl alcohol) as the matrix and 0.1 wt.% addition of graphene materials with different oxygen content to be used for IR shielding applications. The results show that the properties of the graphene filler strongly influence the infrared shielding properties of the obtained nanocomposites. The best IR shielding properties were obtained for the composites where rGO with the lowest oxygen content was used.

Sulfonated Pentablock Copolymer Membranes and Graphene Oxide Addition for Efficient Removal of Metal Ions from Water

“…For the s-PBC polymer, the peaks can be explained according to the assignment reported in [ 24 ], showing no difference (no chemical modification) with respect to the commercial material. We observe a peak at 1007 cm −1 due to the CH stretch of sulfonated polystyrene segment and the signals at 1033 and 1124 cm −1 resulting from the symmetric and antisymmetric stretching vibration of SO 3 H groups, respectively.…”

“…The FT-IR measurements show that graphene oxide has a lot of functional groups present in its structure. Possible group assignment can be found in [ 24 , 29 ]. Indeed, IR absorbance features associated with the chemical functionalities of GO on both the edges and the basal plane, with an overlap of different derivatives of ethers (C-O), epoxides (C-O-C), aromatic C-H and C-OH phenols, appear in the region 800–1330 cm −1 [ 30 ].…”

“…Graphene oxide was prepared via a modified Hummers method [ 24 , 25 ]. Generally, for this process 10 g of graphite (Acros Organics, Thermo Fisher Scientific, Geel, Belgium), 4.7 g of sodium nitrate, 30 g of potassium permanganate and 230 mL of sulfuric acid (98%) were used.…”

Graphene Oxides Derivatives Prepared by an Electrochemical Approach: Correlation between Structure and Properties

“…Interestingly, this degradation temperature initially raises with increasing C/O ratio, showing a maximum value in the range of 1.9 to 2.1, and then decreases. It has been reported that the thermal stability depends on the arrangement of the oxygenated groups on the graphene surface (mainly on edges or defects) [ 52 ]. Thus, it could be that initially upon increasing the C/O ratio, the functional groups generated were located on the edges, thus hardly point defects would be introduced.…”

Production and Properties of Molybdenum Disulfide/Graphene Oxide Hybrid Nanostructures for Catalytic Applications

“…Graphene oxide was synthesized by a modified Hummers’ method as described in [ 50 , 51 ]. GO was obtained through the oxidation of graphite powder using 98% sulfuric acid H 2 SO 4 (Chempur, Piekary Śląskie, Poland) and potassium permanganate KMnO 4 (Chempur, Piekary Śląskie, Poland) in the presence of sodium nitrate NaNO 3 (Sigma-Aldrich, Saint Louis, MI, USA).…”