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Inorganic and organic nano composite materials

by:CSSSLD     2021-01-23
Compared with in situ and solution intercalation, polymer melt intercalation method including lamellar silicate and polymer blend and heat the mixture to the polymer soft point above two steps. With alkyl ammonium cationic modification through ion exchange reaction silicate can improve the compatibility of it with a variety of polymers. Using the method of melt intercalation, many polymers can be formed at the speed of fast injection molding processing of polymer/silicate nanometer composite material.

dissolve the matrix resin with the appropriate solvent, then add the nanoparticles, toss to make uniform particle dispersion in aqueous solution, the solvent is removed or make the polymerization system of samples, the surface modification of organic whole particle blending the polymer with PMMA nanocomposite, fairly homogeneous in nanoscale particles size distribution in the matrix polymer. Similar to the solution blending method, just replace solution with suspension or emulsion. Will freeze drying of the potato starch microcrystalline and blending thermoplastic polymer latex water-based suspension system to a new kind of polymer/organic nanocomposite particles.

solution intercalation, polymer can be directly put in the polymer solution is embedded into the inorganic layers in the gallery. Superconducting material normally brittle, but difficult to machining, practical application is limited. Embedding polymer directly with melting method, the obtained nano composite materials. Polymer/sheet silicate intercalating composite materials to design and manufacture of mainly depends on the sheet silicate tunnels between layer and layer into a series of monomer and polymer. Based on this view, design a new and general melt intercalation method.

when the content of potato starch microcrystalline in 0 60%, the temperature is higher than that of polymer-based transition temperature, the potato starch microcrystalline discharge will be good effect. Surface treatment of nanometer materials and polymer blend, after plasticizing and dispersion process, make the nanometer material dispersed in nanometer level with, reach the purpose of modification of polymer, the advantages of this method is similar to ordinary polymer blending modification, easy to implement industrial production.

compared with LDPE, containing 5 wt the tensile strength of the composites increased by 112%, the tensile elongation at break increased by 25%, the notched impact strength increased by 103%. Materials can be considered to be due to the improvement of the performance of the composite nanoparticles big specific surface area, surface atomic number, and can fully and polymer adsorption, bonding, and mechanical properties improved. Intercalating method is the preparation of organic/inorganic nanocomposites is a kind of important method.

blending method is first synthesized the various forms of nanometer particles, and through various means to mix with organic polymer injection tooling. Blending method required the preparation method of nanometer particles in general can be divided into physical method, chemical method. The physical methods mainly include physical FenSuiFa, evaporation condensation method. Chemical methods including meteorological precipitation, precipitation, templates, reaction method, microemulsion method, colloidal chemical method, hydrothermal synthesis method.

first insert monomer or intercalating agent layer with layer structure of mica type of silicate. The slice thickness is about 1 nm, the layer spacing is in commonly 0. 96 - 2. 1 nm. Then monomer polymerization between the silicate layers. In the process, between monomer into the layer silicate, and for aggregate can make the slice layer spacing expand even dissociation, the layered silicate filler in the polymer matrix to achieve nanoscale dispersion of nano composite material is achieved. The essence of this method is a combination of intercalating and in-situ polymerization.

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