Preparation And Characterization Of Three Dimensionally Ordered Macroporous Materials

This dissertation mainly focuses on the preparation and characterization of three-dimensionally ordered macroporous (3DOM) materials which include two parts. One is thepreparation and characterization of three-dimensionally ordered macroporous hybridmaterials, the other one is the preparation and characterization of3DOM materials usingmonodispersed water-solubility polyacrylamide (PAM) microspheres as template.Hybrid3DOM materials have advantages of both organic and inorganic materials.Meanwhile, the silica skeleton has well biological compatibility, physical and chemicalstability, and hydrophily. The silica skeleton has a better hydrophily compared to3DOMpolystyrene macroporous materials. Thus, the application of silica skeleton isconvenientand expanded. In this paper, polymer chains were graftedfrom silica skeletonthrough SI-ATRP technology. These grafted polymer chains includ a great many offunctional groups, therefore, the productions have a lot of active spots. Compared to thetraditional method attaching functional groups on3DOM silica materials, the advantage ofthis method is very obvious.Preparation of3DOM materials with well-ordered periodicity and interconnected poresystems using colloidal crystals templates is a convenient chemical method. The colloidalcrystals template is obtained from monodispersed microspheres. To etch the templates,hydrofluoric acid (or alkali) or organic solutions are often used. However, both of themethods do harm to the environment and affect the function of3DOM materials. Thissubject is proposed to prepare3DOM materials with water-solubility colloidal crystaltemplates which were fabricated by the monodispersed polyacrylamide (PAM)microspheres. Thus, a green and facile method to prepare3DOM materials can be builtusing water as etching agent. The research contents in detail are listed as follow:1. Monodispersed polystyrene (PS) microspheres were prepared. The structure andmorphology of PS microspheres were characterized by scanning electron microscopy (SEM) and laser particle size analyzer (LPSA). The3DOM SiO2was prepared by using PSmicrospheres colloidal crystal template. PHEMA, PAN, PDMAEMA were grafted from thepore wall of3DOM SiO2by SI-ATRP technique, respectively. The functionalized3DOMSiO2was characterized by FT-IR and SEM.2. Monodispersed PAM microspheres were prepared which were characterized bySEM and LPSA. The3DOM CLPS、3DOM CLPAN、3DOM PMMA、3DOM SiO2、3DOMPU were preparedby using PAM microspheres colloidal crystal template, respectively. Wepay attention to exploit a green anfacile method to prepare3DOM CLPS monolith、3DOMCLPAN monolith、3DOM PMMA monolith by PAM colloidal crystal template. And the3DOM materials were characterized by FT-IR spectra, SEM, appearance andphysicochemical data.