Preparation of p-Phenylenediamine Modified Graphene Foam/Polyaniline@Epoxy Composite with Superior Thermal and EMI Shielding Performance

Abstract

With the development of integrated devices, the local hot spot has become a critical problem to guarantee the working efficiency and the stability. In this work, we proposed an innovative approach to deliver graphene foam/polyaniline@epoxy composites (GF/PANI@EP) with improvement in the thermal and mechanical property performance. The graphene foam was firstly modified by the grafting strategy of p-phenylenediamine to anchor reactive sites for further in-situ polymerization of PANI resulting in a conductive network. The thermal conductivity (κ) and electromagnetic interference shielding (EMI) performance of the optimized GF/PANI4:1@EP is significantly enhanced by 238% and 1184%, respectively, compared to that of pristine EP with superior reduced modulus and hardness. Such a method to deliver GF composites can not only solve the agglomeration problem in traditional high content filler casting process, but also provides an effective way to build up conductive network with low density for thermal management of electronic devices.

Co-containing metal–organic framework for high-performance asymmetric supercapacitors with functionalized reduced graphene oxide

“…The peaks at 1715 cm −1 , 1580 cm −1 , 1210 cm −1 , and 1153 cm −1 corresponded with the CvO stretching vibration of the carboxylic groups, bending vibration of the hydroxyls and the stretching vibration of the epoxide and alkoxy in GO, respectively. 46 On the other hand, the new sharp IR bands at 3333 cm −1 , 1497 cm −1 , and 1130 cm −1 in the PPD-rGO spectrum corresponding to the vibrations of the N-H and C-N groups, respectively, confirmed that PPD was successfully incorporated into the GO sheets. Typically, during PPD treatment, the formation of C-NH-C bands would happen on the GO surface via a nucleophilic substitution reaction between the amine group of PPD and the epoxide group of GO.…”

Polymer composites with 3D graphene architectures as high-performance EMI shielding materials: a review

“…Conducting 3D networks at lower mass concentration of filler have been prepared by modifying GF using p -phenylenediamine (PPD), which anchors the reactive sites on GF for further in situ polymerization of PANI, leading to the formation of the network structure of GF/PANI. 79 It is speculated that PANI promoted the connection of graphene sheets in GF, enabling the formation of the connecting network. After being compounded with epoxy, GF/PANI exhibited an EMI SE value of 38.32 dB.…”

pH-Induced Electrostatic Interaction between Polyacrylates and Amino-Functionalized Graphene Oxide on Stability and Coating Performances

“…Polymer based graphene composites is an important application field because graphene could increase the properties of composites such as mechanical properties [ 1 , 2 ], electrical performances [ 3 , 4 ], thermal properties [ 5 , 6 ], barrier properties [ 7 , 8 ], flame retardancy [ 9 , 10 ], biomedical applications [ 11 , 12 ], etc. For example, Vasile et al [ 13 ] functionalized graphene oxide with 2-hydroxyethyl methacrylate (HEMA) to prepare a composite with a poly(propylene fumarate)/poly(ethylene glycol) dimethacrylate (PPF/PEGDMA) matrix.…”