A novel graphene hybrid for reducing fire hazard of epoxy resin

Abstract

Epoxy resin (EP) is more and more important in many fields, but its application is limited due to the inflammability in air of EP. Therefore, reducing the fire hazard of EP is necessary. In this work, a kind of hybrid flame retardant (α‐ZrP‐RGO) consisting of a 2‐dimensional inorganic reduced graphene oxide (RGO) modified with a planar‐like α‐zirconium phosphate (α‐ZrP) particles was prepared successfully via 1‐step hydrothermal method. The effects of α‐ZrP‐RGO on the thermal performance, flame retardancy, and smoke suppression of EP were investigated by preparing EP composites containing both EP and α‐ZrP‐RGO. Thermogravimetric results revealed that α‐ZrP‐RGO could improve the char yield of EP at 700°C obviously. In addition, compared with pure EP, the peak heat release rate and the total heat release of EP composites were decreased significantly, while the limited oxygen index of EP composites was increased. Meanwhile, the smoke production rate of EP composites was reduced obviously with the addition of α‐ZrP‐RGO. The enhanced flame retardancy and smoke suppression of EP composites were mainly attributed to not only the physical barrier effect of both α‐ZrP and RGO but also the catalytic effect of α‐ZrP during the combustion process of EP composites.

Design of Poly(cyclotriphosphazene)-Functionalized Zirconium Phosphate Nanoplatelets To Simultaneously Enhance the Dynamic Mechanical and Flame Retardancy Properties of Polyamide 6

“…They observed that the PA6 composite consists of 1.5 wt % of ZrP and 2 wt % of AS, showing a better FR activity and V-0 rating in the UL-94 test. Xu et al 23 prepared a hybrid FR-reduced graphene oxide (rGO)@ZrP and further prepared EP composites, and the resulting EP/rGO@ZrP-2% composite showed an efficient FR activity because of a combination of properties such as physical barrier property of rGO and the catalysis effect of α-ZrP.…”

“…They observed that the PA6 composite consists of 1.5 wt % of ZrP and 2 wt % of AS, showing a better FR activity and V-0 rating in the UL-94 test. Xu et al prepared a hybrid FR-reduced graphene oxide (rGO)@ZrP and further prepared EP composites, and the resulting EP/rGO@ZrP-2% composite showed an efficient FR activity because of a combination of properties such as physical barrier property of rGO and the catalysis effect of α-ZrP. Instead of blend FRs, to decrease the loading percentage in the polymer composites currently, synthesis of an effective hybrid FR in a suitable way for surface functionalization with other P-, N-, and P–N-containing compounds was initiated because it can improve the FR efficiency of the derived hybrid FR.…”

Effect of different ionic layered compounds decorated with zinc hydroxystannate on flame retardancy and smoke performance of epoxy resin

“…13 However, in ZHS@α-ZrP, the intensity of the main diffraction peak corresponding to α-ZrP is decreased, due to the deterioration of the surface crystallinity of α-ZrP after the loading of ZHS. 20 This also shows that the synthesis of ZHS@α-ZrP hybrid is successful. In Figure 2B, the absorption peak of the vibration absorption of crystal water is at 3000 to 3500 and 1630 cm −1 ; the absorption peak, wave number between 900 and 1300 cm −1 , is attributed to the PO4 3− adsorption zone.…”

“…In Figure B, six characteristic peaks of ZHS appear on the XRD spectrum of ZHS@α‐ZrP nanohybrid, and three major diffraction peaks corresponding to the α‐ZrP (002), (110), and (112) crystal planes appear at 11.5°, 20.0°, and 25.1°, respectively . However, in ZHS@α‐ZrP, the intensity of the main diffraction peak corresponding to α‐ZrP is decreased, due to the deterioration of the surface crystallinity of α‐ZrP after the loading of ZHS . This also shows that the synthesis of ZHS@α‐ZrP hybrid is successful.…”

Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

“…Graphene has also been incorporated with other inorganic fillers [50,[222][223][224][225][226]. Chen et al [226] ingeniously prepared a smart fire alarm wallpaper based on ultralong hydroxyapatite nanowires (HNs) and GO thermosensitive sensors.…”