Fabrication And Performance Of Colloidal Crystals Based On The Red Blood Cell-like Particles

Due to the spatial asymmetry of structure,the unevenness of the charge distribution,and so on,the anisotropic non-spherical particles possess excellent physical and chemical properties,therefore,they possess unique advantages in the fields of biological sciences field,high-efficiency catalysis,targeted drug delivery and so on.In this thesis,the red blood cell(RBC)-like non-spherical particles with a concave in the center are synthesized via the dispersion polymerization method.After that,the behavior of monolayer/multilayer self-assembly,binary assembly and the arrangement in a two-dimensional to biomimicry the compound eye to prepare the superhydrophobic coatings was also studied.The main research contents are as follows:(1)The non-spherical particles were successfully fabricated via the dispersion polymerization method.The reason for the formation of the anisotropic particles is attributed to the microphase separation in Stage?of the high-density polymer of P(DVB-St)and the relatively low-density polymer of PS.Compared to the low growth speed of the P(DVB-St)phase,the fast swollen and growth of the PS phase induced the formation of the non-spherical particles.In addition,the diameter of particles,ranging from 500 nm to 2.1?m,can be tuned by changing the proportion of the solvent in stage?and stage?.What's more,the large area monolayer/multilayer crystal structures were prepared by the interfacial self-assembly,which is attributed to the nucleation of particles and their further growth under the convective force.(2)The large area hexagonal close-packed colloidal particle arrays based on the 2.1?m RBC-like particles were obtained by the interfacial self-assembly method.Subsequently,the swelling behavior of the arrays under the different solvents was studied and the results showed that the particles are easier to get deformed when their solubility parameter is closer.To control the deformation of the RBC-like particles into the hexagonal particles,the double solvent system containing DMF and TEOS was used to research the swelling behavior of the RBC-like particles.When the DMF:TEOS equals 6:4,the RBC-like particles can transform to the hexagonal one and their corresponding dispersions display the liquid crystal phenomena,which will have a promising application in the display devices and so on.(3)The large area,close-packed colloidal crystal arrays with different orientations were prepared by lift-up or press-down self-assembly method and then transferred on PE stretchable film.Subsequently,the non-close-packed colloidal crystal arrays with a different lattice constant were obtained via the assistant of the electronic stretching machine.The non-close-packed colloidal arrays with a different Bravais arrangement were fabricated by stretching the PE film along with different directions and different elongations.After that,the non-close-packed colloidal arrays were used as a template to prepare the binary patterning colloidal crystal by adjusting the diameter and concentration of the second nanoparticle,which can construct the novel material with a more open system and more complex structure.(4)Inspired by the superhydrophobic phenomena of the compound eye of drosophila,the biomimetic superhydrophobic structure from the RBC-like particle was fabricated.To enhance the mechanical durability,the inorganic Fe₂O₃ nanorods were synthesized and coated on the RBC-like to form RBC@Fe₂O₃ particles.Subsequently,the microscale close-packed particle arrays were obtained by the press-down self-assembly method and then the nanoscale Si O₂particles were deposited on the arrays to mimic the nipples of the compound eye and to enhance the roughness at the same time.In addition,the classical self-healable polymer elastomer NH₂-PDMS was synthesized and used as a substrate to enhance the self-healing property,which is a kind of classical self-healing polymer via the hydrogen bond.The obtained self-healing superhydrophobic film possesses excellent superhydrophobic property(the contact angle is 175°and the sliding angle is 3.5°)and great self-healing property(the film can be self-healed in 2min after being damaged),which will greatly improve the lifespan and the applications in many fields.