Electrosynthesis And Initial Characterization Of Nonspherical Stimuli-Responsve Microgels

The organisms will spontaneous change their form that is optimal for their survival according to the environment.This is correlated to the colloidal chemical structure that constitutes the organisms.Meanwhile,gels can also perform different excellent properties in many areas because of its various shapes.For example,the anisotropy nonspherical gels perform better on the drug release,cellular internalization and targeted therapy than the spherical gels.Compared to the gels,the size of the microgels is down to the micro or nano meters.What is more,the microgels combine the properties of both the gels and the colloids,possessing different functions such as fast response to the environment,injection molding processable,which make them beneficial for the application in the microenvironment.The stimuli-responsive microgels which can undergo volume phase transition with response to the surrounding environment are being paid special focus.However,the relationship between the shape of the stimuli-responsive microgels and their volume phase transition behaviors is rarely reported.In order to answer these questions,the difficulty on synthesis must be overcame,which is how to controllably synthesis the non-sphere stimuli-responsive microgels.The fast development on indirect electropolymerization has aroused our attention because of its various benefits such as more methods to control the synthesis and easy to operate.Our initial exploration found that this method may be helpful for synthesizing nonspherical stimuli-responsive microgels.Hence,as an attempt to overcome the difficulty on synthesizing nonspherical stimuli-responsive microgels,this thesis is mainly focused on using indirect electropolymerization methods to synthesize different shapes of nonspherical stimuli-responsive microgels.After years of hard struggle,we successfully synthesized circular ring and cuboid morphology stimuli-responsive microgels,characterizing their shape influence on volume phase transition behaviors.The primary research includes:(1)Explore the use of copper nanoparticles as electron transfer agent to indirect polymerize the monomer with large steric structure.We use this method to lower the oxidation potential of the monomer and successfully polymerize the monomer which can not be polymerized using the conventional chemical synthesis method.The ring-shaped morphology microgels were successfully prepared.Experimental results revealed this microgel possessed photothermic properties.Therefore,the uniform blending of the microgel with commercially available coating was carried out and coated on the cotton clothes to study their heat preservation functions.(2)Explore the synthesis of nonspherical poly(phenylboronic acid)microgels and their glucose responsiveness using indirect electropolymerization.The copper nanoparticles was used as the electron transfer agent to successfully synthesize cuboid shaped morphology poly(phenylboronic acid)microgels.The influence of the cuboid shaped morphology on the volume transition phase behavior was also studied.