Study On Synthesis And Properties Of Azobenzene Photo-responsive Materials

It is well known that the most common use of azobenzene is as the dyes in industry.However,azobenzene,as a "light switch" molecule,has attracted extensive attention in the application of photo-responsive materials,and has achieved significant results in recent years.The applications of azobenzene in photo-responsive molecular imprinting and photo-responsive hydrophobic materials were mainly discussed in this paper.And we prepared two types of photo-responsive molecular imprinting materials and two types of hydrophobic materials.The specific research contents are as follows:In the first chapter mainly introduced the structural characteristics,isomerization mechanism,research status and applications of azobenzene and its derivatives;summarized the development history of molecularly imprinted materials,especially the application of azobenzene derivatives in photo-responsive molecularly imprinted materials.As well as summarized the research status of hydrophobic materials and photo-response hydrophobic materials.In the second chapter,based on the synthesis of two azobenzene monomers with different side chain lengths,acrylamide azobenzene(AAAB)and undecylamide azobenzene(UAAB),two photo-responsive molecular imprinting materials(AAAB-PRMIPs and UAAB-PRMIPs)were prepared by introducing two azobenzene monomers into the polymerization reaction with acrylic acid,respectively.The structure,thermal stability,and morphology of the imprinted materials were characterized by FTIR,XPS,TGA,and SEM.The photo-response to adsorption property of the two imprinted materials was studied.In chapter three and chapter four,studied the adsorption properties of AAAB-PRMIPs and UAAB-PRMIPs for template molecules,respectively.The adsorption mechanism of imprinted materials was investigated by fitting the experimental results using four adsorption kinetic models and three adsorption thermodynamic models.and obtained the relevant thermodynamic parameters(ΔG°,ΔH°andΔS°).In chapter five,synthesized two photo-responsive hydrophobic materials(AAAB-PFDT and UAAB-PFDT).The structure,thermal stability,and morphology of the materials were characterized by FTIR,XPS,TGA,and SEM.The photo transformation behavior of two materials in dispersion solution was studied using UV-Vis spectrometer.And measured the WCA under different lighting conditions by depositing it on a glass slide,found that both AAAB-PFDT and UAAB-PFDT have good hydrophobicity,photo-responsiveness,and reversibility.In summary,we prepared four types of photo-responsive materials.Investigated the photoresponsivity of the adsorption capacity of two imprinting materials,and studied their adsorption kinetics and thermodynamics.Explored the hydrophobicity and reversible responsiveness of two hydrophobic materials.