Preparation and Humidity Sensing Properties of MXene/CNF Composite Aerogels
In this study,the novel two-dimensional transition metal carbon and nitrogen material(MXene)was composited with cellulose nanofibers(CNF),and four different kinds of CNF composite aerogel sensors were prepared after freeze-drying by the liquid nitrogen direc-tional and non-directional pre-freezing methods.The impacts of various types of CNF and MXene,with different liquid nitrogen pre-freezing methods on the morphology and structure of the MXene/CNF composite aerogels were investigated.The results showed that the oriented monolayer MXene/TOCNF composite aerogel had the most excellent morphology.Additionally,the humidity sensitivity test was conducted at relative humidity levels ranging from 11％～97％.The results revealed a three times of increase in response value at relative humidity of 97％with MXene dosage of 10％,indicating superior sensitive of the sensor to high humidity.Furthermore,the sensors demonstrated overall stablility within 14 days.
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