Synthesis And Application Of Cellulose Hybrid Materials Containing Polyhedral Oligomeric Silsesquioxane

Organic-inorganic nano-hybrid materials have both inorganic and organic components. Such excellent features impart a very wide range of application areas. In recent years, as a multi-discipline cross-frontier, the polyhedral Oligomeric silsesquioxane （POSS） is attention by scientists from various countries. Since POSS containing a unique cage structure, variable active groups, it is compatible with the polymers. To performance, it can significantly increase the high-temperature resistance、oxidation resistance、flame-retardant of the organic-inorganic hybrid materials. However, most of the organic-inorganic hybrid polymers used POSS as inorganic additives are synthesis polymers. There is little research on natural polymers, such as cellulose fiber.Contamination of aquatic media by heavy metals is a serious environmental problem, mainly due to the discharge of industrial waste. Heavy metals are highly toxic at low concentration and can accumulate in living organisms, causing several disorders and diseases. The main techniques that have been used on metal content reduction from industrial waste are chemical precipitation, ion exchange, membrane filtration, and absorption. However, these methods are limited by high operational cost and may also be inefficient in the removal of some metal ions. The application of organic-inorganic hybrids to solve environmental problems has received considerable attention in recent years.In this paper, reactive polyhedral Oligomeric silsesquioxane containing multi-N-methylol groups （POSS-H） from POSS-M, which was synthesized. Its structural formula is as follows: In the meanwhile, the influences of the reaction temperature, reaction time, pH, amount of the formaldehyde on the yield of POSS-H were discussed. The optimum condition is 37%formaldehyde solution（density 1.067kg/m³ï¼‰ 50mL and POSS-M methanol solution（POSS-M 0.078g/mL） 50mL were stired at pH 9 and 90℃for 12h. The structure of the POSS-H was characterized by the FTIR, XRD, FSEM. Then Taking POSS-H dissolved into methanol solution, obtained 0.1g/mL solution, after that POSS-cellulose hybrid materials with POSS-H and cellulose fibers were obtained. The influences of the reaction temperature, citric acid dosage, magnesium chloride dosage, POSS-H solution, as well as the amount of compound cross-linker SDP usage on the physical and mechanical properties of POSS-H were also discussed. The best process is: when the dosage of POSS-H is 50mL, citric acid is 5g/L, chloride is 15g/L, and the curing temperature is 150, the total volume is 100mL, at this time the physical and mechanical properties of the POSS- cellulose hybrid materials were the best. The structure of the POSS- cellulose hybrid materials was characterized by the FTIR, XPS, SEM.In this paper, the adsorption effects of POSS-cellulose hybrid material to Argazol red BF/3B, and heavy metal ions Cu²⁺、Ni²⁺ were studied, besides, the isotherm equation and adsorption kinetics were also discussed. The results showed that: The adsorption effects on Argazol red BF/3B was obvious, the adsorption consistent with Langmuir adsorption isotherm, and the adsorption kinetics can be used to describe the quasi-two kinetic equation; The adsorption effect on Cu²⁺ was better than the effect on Ni²⁺, meanwhile, we also get the best adsorption pH, which was 6,and the best adsorption equilibrium time, which were 50min for Cu²⁺,and 2h for Ni²⁺. And it was found that both of the two kinds of metal adsorption kinetic equation can be used to describe the quasi-two, which Langmuir type isotherm model closer to the reality of these two kinds of adsorption of metal ions, it showed that adsorption was mainly a simple single-layer adsorption.