Polyvinyl alcohol/inorganic nanometer oxide particle composite material and preparation method thereof

Abstract

The invention discloses a polyvinyl alcohol / inorganic nanometer oxide particle composite material and a preparation method thereof. The material has a core-shell structure taking inorganic nanometer oxide particles as a core and polyvinyl alcohol as a shell, the core and the shell are connected by a chemical bond of M-O-C bond and a hydrogen bond, and the M in the M-O-C bond is Si or Al or Ti or Zn; and the method comprises that: firstly, the inorganic nanometer oxide particles are dispersed in low molecular alcohol or by a sol-gel method to prepare dispersoid or low molecular alcosol of the inorganic nanometer oxide particles; the dispersoid or low molecular alcosol is added with an initiator and vinyl acetate monomer for even mixing, and the mixture is subjected to polymerization reaction at a temperature of between 60 and 70 DEG C to prepare a polyvinyl acetate / inorganic nanometer oxide particle complex; and finally, the complex is added to alcoholic solution of alkali with the concentration between 0.1 and 1M for alcoholysis reaction at a temperature of between 25 and 45DEG C for 1 to 2 hours to prepare the polyvinyl alcohol / inorganic nanometer oxide particle composite material. The polyvinyl alcohol / inorganic nanometer oxide particle composite material can be used in the fields such as fibers, package materials, paper processing agents, binding agents, carrier materials, optical materials, film materials and the like.

Description

technical field [0001] The invention relates to a composite material and a preparation method, in particular to a polyvinyl alcohol / inorganic nano oxide particle composite material and a preparation method thereof. Background technique [0002] Polyvinyl Alcohol (PVA) is a water-soluble polymer with many unique properties, although it can be widely used in textiles, food, medicine, construction, wood processing, papermaking, printing, agriculture, metallurgy, etc. However, it also has the disadvantages of unsatisfactory strength and thermal decomposition temperature, which limits the further expansion of its application field. Due to their small particle size, significant quantum size effect between particles and macroscopic quantum tunneling effect, nanomaterials exhibit excellent properties that cannot be compared with conventional materials. At present, people have made some attempts and efforts in order to improve the potential of the mechanical properties of polyvinyl ...

AI Technical Summary

Problems solved by technology

But all there is weak point in this polyvinyl alcohol composite film and preparation method thereof, at first, between the various raw materials of the polyvinyl alcohol composite material of making polyvinyl alcohol composite film, i.e. vinyl acetate monomer and starch, Nano ZnO / SiO 2 The composite powder and glycerin are only blended, and the interface between them is only some physical or chemical adsorption, as well as the effect of hydrogen bonds. There is no bonding effect of strong chemical bonds, which has limited influence on material properties, resulting in final strength and heat. The decomposition temperature has not been substantially improved; secondly, the preparation method is more complicated, and it is difficult to avoid the problem of agglomeration of nanocomposite powder in the polyvinyl alcohol composite material by using the blending method

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