Synthesis And Characterization Of Novel Amino And Carboxyl Azobenzene-functionalized Polymer

Smart-responsive material can feel the stimulus from the external environment (such as light, pH value, temperature, ionic strength, solvent, etc.) and change performance parameters and generate a response in real time, resulting in a significant change in some physical or chemical properties. The light, as an external stimulus, has the advantages of clean, safe, efficienty, and easy to control, and so on, which leads to the fact that light-responsive materials research has become one of the widely focus in recent years. The basic units of light-responsive materials are azobenzene, fulgide diarylethene, stilbene and spiropyran, etc. Among them, the azobenzene is the best response unit and mostly studied by the researchers. This thesis develop some smart-responsive material with azobenzene as a unit, and the main contents are as follows:1. Synthesis and Characterization of light and pH response of nanomaterialsIn this chapter, a new functional monomer of4-amino-4’-methacrylamido-azobenzene (referred to AMAB) was synthesized, which has good light and pH responses. Its structure was confirmed by NMR and UV-Vis. Using the AIBN as initiator, AMAB polymer with TRIM to obtain a novel photo smatr nano-material via precipitation polymerization method. The effect on the material performance about molar ratio of TRIM and AMAB was also studied. This obtain material also has excellent light and pH response performance. The material has six cycles of light stimulation with alterative wavelength, and the pH responsive range is pH=-1.0to2.02. Synthesis and Characterization of light and pH-responsive hydrogelIn this chapter, a new cross-linker of trimethyl acrylatyl ethyl amine (TMAEA) was synthesized. Its structure was confirmed by NMR. Using the Potassium Persulfate as initiator, the AMAB react with TMAEA to obtain a novel intelligent hydrogel-material via precipitation polymerization method. In order to prepare good performance of hydrogel materal, the molar ratio of TMAEA and AMAB was studied.The material possesses photo responses in water, which make up defects of reported azobenzene materials only in an organic solvent or mixture solvent. The material has ten light-response cycles, pH responsive range is pH=-1.0to2.03. The Exploration of Synthesis and Characterization of Multi-carboxyl3-D ComplexesTwo functional monomers:3,3’,5,5’-tetracarboxyl azobenzene (AB4) and4,4’-carboxyl azobenzene (AB2) were synthesized and their structure were confirmed by NMR, CHN and MS. Then, the AB4and AB2react with some metal ions to obtain some complexes. The experimental condiations (solvent, reaction temperature, molar ratio) were studied. Characterizations by SEM TG, XRD, UV-Vis, BET absorbation of materal show3-D structure, which may present some new functions and display some potential application value.