Synthesis And Characterization Of Novel Inorganic Materials Based On Microporous Zeolite And Exploration Of Their Properties

With special structure and properties, microporous molecular sieve material is widely used in modern society. The traditional applications of microporous molecular sieve include gas separation, ion exchange, adsorption and catalytic cracking and so on. However, with the rapid development of modern society, the higher requirements for the new materials and with the rapid development of new technologies, traditional molecular sieves can no longer meet all the needs of people today. Microporous molecular sieve was found as an excellent host material with people's further research on it and with the development and application of modern technology. And Microporous molecular sieve filled with functional guest objects has many advanced properties, which are very interesting and useful.This thesis contains three areas. First of all, a fine synthetic route of microporous molecular, SAPO-44, is optimized. Secondly, zinc and cadmium are assembled into the cage structure of SAPO-44. And thirdly, a further Host-Guest material with free radical polymerization function is made. Microporous molecular sieve SAPO-44 belongs to a series of zeolite, Silicoaluminophosphate zeolite, is found of SiO4 tetrahedral units, AlO4 tetrahedral units, PO4 tetrahedral units, whose synthesis process is quite simple. SAPO-44's window size is moderate, enjoys periodic ordered structure with uniform pore, cage structure and has strong mechanical strength and high thermal stability and hydrothermal stability. There are many methods to synthesize zeolite, including hydrothermal, solvothermal synthesis, microwave synthesis which are commonly used. And hydrothermal synthesis is regarded the best way to make zeolite and is widely used nowadays. In this paper, microporous molecular sieve SAPO-44 is synthesized by hydrothermal method. And the factors those will impact zeolite crystallization are optimized by study the factors such as crystallization temperature, reaction time, molar ratio of reactants, template usage, mineralizing agent and so on, which will provide a prerequisite fine host material for further functionalized.As we know, metal is usually more active, is very easy to lose its electron when it meets oxidant and performs electronic electropositive. And certain numbers of outer electrons in electron orbit of metal are usually lost to achieve as full electrons filled its electronic orbit or half-full filled state. In this case, the energy of the electrons remains is quite lower and much more stable, thus the metallic cations is more stable. So, metal elements are willing to lose certain number of their electrons to become stable cations and it is not easy to get a cation with an unusual valence. One of the commonly used methods to achieve such metallic cation with unusual valence is high-energy ray irradiation, however, the unusual valence of the metallic cation can only last for a very short moment. However, we found that when the microporous molecular sieves SAPO-44 we obtained above meets the metal zinc or cadmium vapor, they we have some reaction, and the much more stable zinc and cadmium cation can be found in the zeolite cages with unusual valence. X-ray diffraction analysis showed that the introduction of the metal ions locates in zeolite cage structure, rather than the adsorption on the surface of zeolite. And the framework of the zeolite does not been destroyed by the introduction. The sample's simple-electron spin resonance is verified by electron spin resonance, which implies that these is simple electron in the zeolite. And it shows antiferromagnetic interactions in magnetic analysis. Finally, we proposed a mechanism for the Host-Guest material and supported it with some evidence.Radical polymerization is one of the most important reactions in polymer chemistry and occupies an extremely important position. It is also the first reaction studied in polymer chemistry and the most developed one, which the reaction mechanism, kinetic theory of thermodynamics is more complete of. Those polymer materials made through radical polymerization enjoy a high share of aggregate production. Over 60% of the polymers are obtained by radical polymerization currently. And in the production of thermoplastic resin production, the number is nearly 80%. Actually, most of the polymers related with human lives are produced by radical polymerization, including most of the plastics, synthetic rubber and other polymer materials. Thus, radical polymerization is very important for human. Free radical initiators are required for such radical polymerization. Commonly used free radical initiator can be classified as azo compounds initiator, peroxide initiators, agent with oxidation-reduction system and some light induced free radical initiator. The radical initiator mentioned above have their applications and advantages, however, they suffer their flaws at the same time. Many free radical initiator will release gases when it is used, it is not conducive to the synthesis of high-performance polymer materials, and suffer the dangerous of explosive. In addition, some of the initiator only has reaction activity when it is used in certain temperature, which is not a pleasant environment for some of the radical polymerization. Some of the initiator can only be used under specific conditions such as in aqueous solution, which limit its application. Therefore, traditional free radical initiator suffers its own shortages. In this paper, we further developed the Host-Guest materials obtained in chapter 3, the unconventional metal ions and microprous molecular sieve SAPO-44 composite materials, and get a derivative material from it. And we found that it can play a polymer free radical polymerization role and we have successfully let to the polymerization of methyl methacrylate. Moreover, it shows a high ability to cause free radical polymerization in quite low temperature, which we believe, will bring new vitality in radical polymerization.