Preparation of silk sericin-based porous carbon and its microwave absorption property
To solve the problems of complicated process,severe pollution and high cost in the preparation process of traditional porous carbon materials,in-situ doping silk sericin-based derived porous carbon(SSC)materials were prepared with waste sericin treated by activation-carbonization method.The morphology and structure of the materials were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and laser Raman spectrometer(Raman).The influence of the heat treatment temperature on the microwave absorption properties of the materials were analyzed by vector network analyzer.The results show that the samples exhibit the best microwave absorption properties when the mass ratios of silk sericin and activator KHCO3 are 2:1 and the heat treatment temperature is 700 ℃.The SSC-700 samples have the best absorbing performance,and the minimum reflection loss is-51.30 dB at 16.55 GHz,and the effective absorption bandwidth is 3.60 GHz(14.40～18.00 GHz)corresponding to the thicknesses of 1.4 mm.The material's own conductivity loss and the synergy of multiple polarization mechanisms give SSC-700 excellent microwave absorption performance.This study provides a new strategy for the development and utilization of biomass carbon materials,and the resulting SSC materials have a wide range of applications in the field of microwave absorption.
NETL
NSTL
万方数据
维普
