| Non-woven fabric is a kind of fabric formed by disordered lapping of fibers.There are many kinds of non-woven fabrics,such as wet spinning and electrostatic spinning.Electrospinning is a simple,universal technique for preparing nanofibers that uses electrostatic forces as traction,allowing the synthesis of microfibers or nanofibers from a variety of polymers and composites to produce ultra-thin nonwoven films or fabrics.The fiber membrane prepared by electrostatic spinning has the advantages of high specific surface area and high porosity.Therefore,the electrospinning fiber membrane has a good application prospect in the fields of wound healing,nanosensors and biochips.However,the adhesion between nanofiber membrane and substrate is a factor that must be considered in practical application.In this paper,a new measuring instrument is designed for the measurement of adhesion,and the influence of voltage and substrate on adhesion is known through research.In addition,in order to construct the porous structure inside the fiber,a kind of graphene aerogel non-woven fabric was synthesized to solve this problem,and its structure and properties were studied.1)In practical applications,the electrospun fiber mesh may need to adhere to the substrate,such as PAN adsorption on the window screen for PM2.5 filtration,insitu electrospun wound dressing adsorption on the hand skin,or removal of the stent from the collector to prevent hyperplastic scars.Therefore,the adhesion between the electrospun fiber mesh and the substrate plays an important role in the function and practical application of the electrospun material.In this paper,a direct pull-out method is proposed to measure the adhesion of materials and its adhesion mechanism is studied.In this method,we use gravity to pull the fiber directly from the substrate and calculate the adhesion by measuring gravity.This new detection method is more convenient and practical than the previously reported method.In addition,the adhesion of in-situ electrospun mesh on different substrates(such as aluminum foil,wood pulp paper and silicone oil paper),the effects of spinning voltage,conductivity and substrate surface roughness on the bonding performance were also studied2)By referring to the idea of fiber propagation in air and substrate collection in electrostatic spinning technology,the fiber was introduced into the process of go liquid crystal wet spinning to realize the formation of spiral go liquid crystal gel fiber and the collection of its aggregates.Subsequent chemical reduction and supercritical drying to obtain a structurally stable graphene aerogel fiber-based nonwoven fabric Considering that in graphene aerogel nonwoven fabrics,the graphene aerogel fibers cross and wind each other,forming a porous network.The macro pore gap between the fibers provides a way for the solution system to quickly pass through and realize the high-flux filtration of the solution.In addition,the graphene aerogel fiber itself has a continuous 3D porous network of mesoporous and macroporous combinations that provide attachment points for pollutants and can adsorb different molecules.Based on this,by studying the adsorption test of rhodamine B and creatinine of this non-woven fabric,the feasibility of the application of graphene aerogel non-woven fabric in blood purification was explored.3)Phase transition nonwoven fabrics with photothermal and electrothermal responses were prepared by introducing phase transition materials into graphene aerogel nonwoven fabrics,and their multiple stimulus response behaviors were further explored,providing a new theoretical direction for the new generation of electronic fabrics. |
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