Preparation and characterization of epoxy composites containing dynamic disulfide and silicon-oxygen bonds
As emerging class of polymer materials,due to its crosslinked network contains reversible covalent bonds that can be stimulated to display dynamic properties without affecting the integrity of the crosslinked network,vitrimer has both the process-ability of thermoplastics and the crosslinked network of thermosets,can reduce the environmental pollution and waste of resources caused by waste of plastics,thus attracting much attention.To effectively ameliorate the environmental problems caused by the non-recyclable of epoxy resins,a series of multi-walled carbon nanotubes(MWCNTs)/vitrimer composites(EPGCSLx)containing dual dynamic covalent bonds were prepared by introducing silicon-oxygen and disulfide bonds into the epoxy network via a one-pot method.The conductivity,thermomechanical,self-healing,reprocessing and degradability of the materials were investigated at different MWCNTs doping levels.The results show that EPGCSL5(5wt%of MWCNTs)has good electrical conductivity(2.09 S/m)and mechanical properties(tensile strength is 8.12 MPa,elongation at break is 84.67%).EPGCSL5 also possesses reprocessing,degradability,and photo-thermal properties,which fully combines the vitrimer and epoxy composites'advantages.In addition,EPGCSL5 was prepared as a human motion sensor,demonstrating its potential application as a motion sensor.
NETL
NSTL
万方数据
