Behavior Regulation Of Multifunctional Driver Based On Graphene Double Laver Composite

In recent years,high-performance software drive materials have attracted more and more attention due to their broad application potential in biomedical,drive sensing,bionic machines and artificial muscles.In order to obtain a multifunctional driver with low cost,simple structure,high degree of freedom and fast response,its own structural design and material properties are crucial factors.Graphene,graphene oxide(GO)and carbon nanotubes(CNT)and other carbon materials have significant electrical,optical,thermal and mechanical properties,have a wide range of applications,and are considered to be very promising driver candidates.At present,most of the thin film drivers prepared only respond to a single stimulus,and have challenges in such aspects as slow response speed under photothermal stimulation or humidity stimulation,small maximum deflection angle,inaccurate driving behavior of the drivers,and the like.Therefore,it is necessary to develop a composite thin-film driver with multi-stimulus response,fast response rate,high stability and multiple applications.Inspired by the above,through the synthesis of graphene-based paper/bidirectional stretchable polypropylene(BOPP)composite films,starting from the response and behavior regulation of graphene-based drivers,the specific experimental contents are summarized as follows:1.Conductive paste was attached to fiber paper by spin coating method and formed a composite film with BOPP to prepare Conductive Paste Paper/BOPP composite film driver.On the one hand,BOPP has a high coefficient of thermal expansion(1.37×10-4/K);The conductive paste has high heat absorption,hygroscopicity and high photo-thermal conversion rate.On the other hand,fiber paper has a low coefficient of thermal expansion(6.00×10-6/K).When the composite thin film driver is stimulated by the outside world,the two sides of the driver have different film shape variables,which makes the response speed of the driver faster.The exact deformation of Conductive Paste Paper/BOPP driver under external stimulation was studied by size and texture.Grain size of 40 mm×8 mm×90 ?m of 0°textured Conductive Paste Paper/BOPP composite film driver can reach 128.3° in 2.4 s when the near infrared light density is 350 mW·cm-2.When the stimulus disappears,the time within 11s can return to the original state;Under the condition of humidity driving,the maximum deflection angle of 0°texture Conductive Paste Paper/BOPP driver can reach 147.8°.Conductive Paste Paper/BOPP driver has good response rate and stability in photothermal drive and humidity drive.2.The mixed solution of graphene oxide and carbon INK is infiltrated on semi-cooked rice paper by ultrasonic infiltration method,and is bonded with BOPP after drying to form INK-GO Paper/BOPP composite film driver.The INK-GO Paper/BOPP composite film driver has large deformation,fast response rate and high stability by utilizing the high heat absorption and high light-heat conversion rate of INK and GO,high moisture absorption expansion coefficient of semi-cooked rice paper,hydrophilicity of GO and high thermal expansion coefficient of BOPP.The 0°textured INK-GO Paper/BOPP composite film driver with grain size of 2 mm×70 mm 106 ?m has a maximum deflection angle of 374.3° and a maximum deflection rate of 78.9°/s under 250 mW·cm-2 near infrared illumination.Under the condition of humidity driving,it reaches 189.6°.3.The bionic mechanical arm,fully intelligent automatic curtain,walking robot,rolling wheel and other simple driver applications are prepared by using the above two composite film drivers.The composite thin film driver can exhibit large deformation,fast response and various bionic motions through low cost and simple structural design,which proves that it has great potential in home applications,biomedicine,bionic applications and other fields.