Preparation And Application Of Graphene-reduced Graphene,Silver Nanowire/latex Sponge-based Composite Materials

Natural latex sponge is a low-density continuous porous rubber material,which is one of the important products in the latex industry due to its good elasticity,excellent cushioning performance and strong compression and permanent deformation capacity.However,at present,natural latex sponges are mainly used in various top bedding such as latex mattresses,latex pillows,etc,and the scope of employ is relatively single.Therefore,with the rapid development of science and technology,more and more people begin to modify some of the special properties of latex sponge,such as the electrical conductivity of latex sponge.Based on the excellent mechanical and electrical properties of nanomaterials,the latex sponges are modified with nanomaterials to obtain functionalized latex sponges.Some unexpected characteristics were given to the latex sponge,which could improve the performance of the latex sponge and broaden its application rangeFor the above purposes,natural organic acid gallic acid was used as the reducing agent to reduce graphene and silver nanowires,and the functional modification of latex sponge by graphene and silver nanowires was studied in this paper.The specific contents mainly include the following three aspects(1)Above all,preparation and mechanical and electrical properties of gallic acid-reduced graphene/latex sponge matrix composites.In order to broaden the application field of sponges,graphene/latex sponges were prepared by introducing gallic acid as a reducing agent using the impregnation method and internal mixing method.The morphology,structure and thermal stability of the product were analyzed and studied by SEM,IR,Raman,TGA and other characterization methods.At the same time,the differences in tensile strength,elongation at break,and anti-aging properties of the latex sponges prepared by the two methods were studied.The experiments showed that the graphene/latex sponges prepared by the impregnation method had better properties.By immersion method of the preparation of graphene/latex sponge surface resistance can reach about 35 ?/sq,with excellent electrical conductivity and potential applications in functional conductive composites.However,the surface resistance of the graphene/latex sponge prepared by the internal mixing method reaches about 10 MQ/sq,which have a good antistatic effect and have obvious advantages in the field of antistatic materials.(2)Secondly,study on the parameters of preparing silver nanowires by reduction of gallic acid.Using the solvothermal method with the green product gallic acid as the reducing agent,through SEM,TEM,XRD and other types of characterization methods,studied the synthesis of uniform morphology of silver nanowires with the best proportion of each parameter such as temperature,concentration of sodium chloride,the concentration,reducing agent polyvinylpyrrolidone amount of gallic acid and sodium chloride injection rate etc.Finally,silver nanowires with an average diameter of about 50 nm and an average length of about 10-15 ?m were synthesized.(3)Finally,preparation and application of the flexible electrode of the composite material of polyporous carbon and gallic acid reduced silver nanowire in latex sponge base.Firstly,the composite material of silver nanowire/porous carbon was synthesized by calcination of porous carbon from waste latex sponge,and gallic acid was used as reducing agent by one-pot solvent heat method.Meanwhile,the application of the composite material in flexible conductive film and supercapacitor was studied.The experimental results show that during heating and adhesion,the resistance of the flexible conductive film does not change significantly,indicating that the composite material have good oxidation resistance.Secondly,the composite material have a capacitance value of 150 F/g when the current density is 1 A/g,which proves that the composite material can be used as a supercapacitor material with good performance.