Study On The Preparation Of Multifunctional Ionogel And The Relationship Between Its Structure And Properties

The development of materials is the basis of social progress.With the development of science and technology,the service environment of new materials is more and more diverse;the use conditions are more and more stringent.Meanwhile,people also have new expectations for the function of materials.In the past two decades,ionic liquids have attracted wide attention of researchers due to their excellent electrical conductivity,thermal stability,wide electrochemical window and antibacterial properties,and their unique properties have promoted their exploration and development in the gel field.Ionic liquids help to regulate the structure and function of ionogels by providing covalent bond interaction,hydrogen bond interaction,electrostatic interaction,host-guest interaction,van der Waals interaction,and ILphilic and IL-phobic interaction.Ionogels are usually designed by gelling agents to form polymer networks in ionic liquids,and ionic liquids are confined to the network after gelation.According to the different formation methods,ionogels can be divided into chemical crosslinking networks and physical cross-linking networks.Chemical cross-linking networks are composed of covalent bonds formed by chemical reactions.Physical cross-linking networks are composed of hydrogen bond interaction,electrostatic interaction,host-guest interaction,van der Waals interaction and IL-philic and IL-phobic interaction.The unique properties and variety of ionic liquids,as well as the diversity of gels,bring infinite potential for the structure and performance design of ionogels.In this study,we made a preliminary exploration on the application of ionogel in conductive glass and underwater adhesive.It is verified that the structure and properties of ionogel can be easily designed by selecting different types of ionic liquids and gels and adjusting the ratio between them.In the first part of this paper,a kind of high modulus non-crosslinked ionogel conductive glass was prepared by introducing a variety of synergistic physical interactions.Hydrogen bonding interaction and electrostatic interaction synergistically enhance the modulus and strength of the materials,and the introduced aromatic ring monomers participate in the ionogel skeleton,and the π-π interaction between aromatic rings and cations all participate in the mechanical properties of synergistic reinforced materials.Therefore,we have obtained high modulus non-crosslinked ionogel conductive glass with excellent properties.Moreover,because of the reversibility of hydrogen bond interaction and electrostatic interaction,as well as the conductivity of ionic liquids,the prepared high modulus non-crosslinked ionogel conductive glass has the ability of electrically induced thermal deformation and self-heal abilities.That makes it have a good application potential and prospect in the fields of electronics,electrical and optical instruments.In the second part of this paper,based on the design of high modulus non-crosslinked ionogel conductive glass,the ionogel adhesive with multiple interaction and hydrophobicity was constructed with the same raw materials and different weight ratios.The strong bonding to many kinds of surfaces is realized under water,including metal(stainless steel,metal aluminum),inorganic non-metal(glass),polar polymer(polyimide)and non-polar polymer(polypropylene,polytetrafluoroethylene).The bonding strength to stainless steel reaches 250 k Pa,which is much higher than that reported in other reports.