Pillararene-based Supramolecular Polymer Adhesion Materials

Macrocycles,as important building blocks of supramolecular polymers,have been widely used to prepare supramolecular polymer adhesive materials with tough and stimuli-responsive properties.Pillar[n]arenes,as the fifth-generation supramolecular macrocycles,play a key role in the development of supramolecular chemistry due to their excellent modifiability.Based on these features,pillar[ n]arenes are ideal elements for the preparation of functional supramolecular polymers materials.Scientists have develped various pillararene-based supramolecular polymer materials,which have been widely used in many fields,such as chemical sensing,adsorption and separation,drug delivery,fluorescence detection,stimuli-responsive,etc.However,pillararene-based supramolecular polymer materials have been rarely used to achieve supramolecular adhesion.It is of great significance to explore pillararene-based supramolecular polymers adhesion materials.In this thesis,we conducted the following related studies:The first part: we designed pillararene-based supramolecular polymers adhesion materials via non-covalent interactions between water-soluble pillar[5]arene WP5 and acids.Based on the formation of three-dimensional supramolecular polymers networks,the supramolecular adhesives not only achieved tough and long stable adhesion properties on hydrophilic or hydrophobic surfaces,but also showed excellent adhesion behaviors in different environments(different temperature,different relative humidity).WP5-acid-based supramolecular polymers adhesives exhibited strong and long-term organic solvent-resistant adhesion performances.Meanwhile,the possible polymerization and adhesion mechanism were studied by the combined experimental and theoretical calculations.Furthermore,we explored the application of the supramolecular adhesives as a new type of conductive glues.The second part: we constructed supramolecular polymer adhesion materials through molecular recognition of the water-soluble pillar[5]arene WP5 with diphenols.The possible supramolecular polymerization mechanism was carefully studied by NMR,rheology and other experiments.The adhesion properties of the adhesives were investigated by SEM and lap-shear tests.Based on the excellent processability of the supramolecular adhesives,good adhesion effects on various substrates were achieved.In addition,the supramolecular adhesives not only achieved strong adhesion effectd at lower temperature and relative humidity range,but also exhibited excellent resistance to organic solvents.