Additive‐free, robust and superelastic dual‐network graphene/melamine composite sponge for motion sensing. Issue 32 (1st April 2021)

• Record Type: Journal Article
• Authors: Zhang, Linjiong; Feng, Lianfang; Gu, Xueping; Zhang, Cailiang
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 32(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-04-01
• Subjects: composites -- foams -- nanostructured polymers -- non‐polymeric materials -- porous materials -- sensors and actuators; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.50788
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: Graphene aerogel (GA) has a large potential in many fields such as energy storage, catalyst support, and sensors. However, its poor mechanical property has restricted the wide application. In this work, superelastic and robust melamine/graphene composite sponges are prepared by constructing a dual‐network structure of melamine and graphene without any chemical additives. The strength of as‐prepared composite sponge at 50% strain can reach 40 times higher than that of controlled GA. After 50 compressive cycles, the strain and strength recovery ratios of composite sponge are about 97% and 90%, respectively. More importantly, the excellent compression performance combines with the good electrical conductivity of the graphene network enable it as a dynamic piezo‐resistive material, which can provide immediate responses to dynamic stresses and strains with different frequencies. Benefitting by these excellent performances, the dual‐network composite sponge shows a great potential application in the field of motion sensing. Abstract : Superelastic and robust melamine/graphene composite sponges are prepared by constructing a dual‐network structure of melamine and graphene without any chemical additives. Excellent compression performance combines with the good electrical conductivity of the graphene network enable it as a dynamic piezo‐resistive material, which can provide immediate responses to dynamic stresses and strains with different frequencies.