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Type intercalating nano filler used
by：CSSSLD
2021-02-03
Intercalating agent with the polymer monomer and polymer chain has strong interaction not only is advantageous to the intercalating reactions, but also can strengthen the interface bonding of two alternate with, is helpful to improve the performance of composite injection molding processing, has the best may take part in the group of the polymerization, polymer matrix can be connected through the ionic bond with silicate layer, increase the compatibility of two phases.
Second cheap, can be industrialized production.
intercalating composite is initially in the study of graphite structure. Graphite has a layered structure, relative slip between layers can be, but the graphite layers is a complete crystal structure, other molecules hard to intercalated into the interlayer, especially the large volume of long-chain structure of polymer. Although the studies of polymer/graphite intercalation compounds, there are still scholars are doing now is more research mica class silicate.
natural montmorillonite is a layered structure, about 1 nm, layer spacing between layers is hydration of Na +, Ca2 + exchangeable inorganic cations, such as the hydrophilic environment conducive to the intercalating reactions. This need for ion exchange with organic cation change montmorillonite layer of polarity, can reduce the surface of the silicate layers, and to increase the two affinity. Such organic cation is called intercalating agent. Commonly used intercalating agent for long chain quaternary ammonium salt, changing the montmorillonite layers between micro environment at the same time, due to large quaternary ammonium salt system, after entering the interlayer can make the distance between the layer of expanded, weaken the lamella inter-atomic forces, thus is advantageous to the intercalating reactions.
mica silicate each unit cell consists of two middle placing an aluminum silicon oxygen tetrahedron chip of a chip oxygen octahedrons sandwich structure, by sharing between oxygen atoms in succession. This tetrahedral and octahedral tightly packed structure has the highly ordered crystal alignment, the thickness of each layer of 1 nm, high rigidity, not easy to slip between the layers. Due to the parts of the silicon oxygen tetrahedron and alumina parts of the octahedral isomorphous replacement by magnesium 2 +, so after the 1 nm of excess negative charge of the surface of the lamella.
in order to keep neutral, the excess of negative charge compensation by interlayer of cation adsorption. Montmorillonite interlayer usually hydrated cation adsorption, they easily with organic or inorganic cation exchange, make the layer spacing of change. Layer between the number of exchangeable cation ion exchange capacity that is not the higher the better, there are a lot of inorganic substances with similar to the results of the montmorillonite layer structure, layer also negatively charged, middle lamella also has a cation adsorption, but they are not easy to form with polymer intercalated nanocomposites. Because of the montmorillonite layers of CEC in 60 - usually in the middle Tendency for 120/100 g range, it is a more appropriate ion exchange capacity.
type intercalating nano molding processing materials in the polymer condensed matter physics has unique research value, it provides a polymer chain highly restricted to two dimensional space and ideal modulus of polymer brushes. To this kind of composite material structure and the further research of static and dynamic behavior, can the study of polymer chain limited behavior in condensed matter physics have to rent. Used by intercalating composite filler piece of layered structure is required, such as silicate material.
if inorganic ion exchange capacity is too high, very high coulomb force that inorganic layers between the layers of inter-atomic forces is too big, is not conducive to insert of macromolecular chain. If the inorganic ion exchange capacity is too low, inorganic matter not effective interaction with polymers. Not enough to packing inorganic compatibility with polymer matrix. Can't get the same intercalated nanocomposites, appropriate ion exchange capacity, excellent mechanical properties and low price, makes the montmorillonite preparation of PLS nanocomposites become the preferred mineral.
more excellent articles: preparation of ion exchange material structure, click directly.
http://www。 csssld。 cn//html/2016/Info_1225/443。 HTML
nantong on suye's official website: http://www. csssld。 cn//
intercalating composite is initially in the study of graphite structure. Graphite has a layered structure, relative slip between layers can be, but the graphite layers is a complete crystal structure, other molecules hard to intercalated into the interlayer, especially the large volume of long-chain structure of polymer. Although the studies of polymer/graphite intercalation compounds, there are still scholars are doing now is more research mica class silicate.
natural montmorillonite is a layered structure, about 1 nm, layer spacing between layers is hydration of Na +, Ca2 + exchangeable inorganic cations, such as the hydrophilic environment conducive to the intercalating reactions. This need for ion exchange with organic cation change montmorillonite layer of polarity, can reduce the surface of the silicate layers, and to increase the two affinity. Such organic cation is called intercalating agent. Commonly used intercalating agent for long chain quaternary ammonium salt, changing the montmorillonite layers between micro environment at the same time, due to large quaternary ammonium salt system, after entering the interlayer can make the distance between the layer of expanded, weaken the lamella inter-atomic forces, thus is advantageous to the intercalating reactions.
mica silicate each unit cell consists of two middle placing an aluminum silicon oxygen tetrahedron chip of a chip oxygen octahedrons sandwich structure, by sharing between oxygen atoms in succession. This tetrahedral and octahedral tightly packed structure has the highly ordered crystal alignment, the thickness of each layer of 1 nm, high rigidity, not easy to slip between the layers. Due to the parts of the silicon oxygen tetrahedron and alumina parts of the octahedral isomorphous replacement by magnesium 2 +, so after the 1 nm of excess negative charge of the surface of the lamella.
in order to keep neutral, the excess of negative charge compensation by interlayer of cation adsorption. Montmorillonite interlayer usually hydrated cation adsorption, they easily with organic or inorganic cation exchange, make the layer spacing of change. Layer between the number of exchangeable cation ion exchange capacity that is not the higher the better, there are a lot of inorganic substances with similar to the results of the montmorillonite layer structure, layer also negatively charged, middle lamella also has a cation adsorption, but they are not easy to form with polymer intercalated nanocomposites. Because of the montmorillonite layers of CEC in 60 - usually in the middle Tendency for 120/100 g range, it is a more appropriate ion exchange capacity.
type intercalating nano molding processing materials in the polymer condensed matter physics has unique research value, it provides a polymer chain highly restricted to two dimensional space and ideal modulus of polymer brushes. To this kind of composite material structure and the further research of static and dynamic behavior, can the study of polymer chain limited behavior in condensed matter physics have to rent. Used by intercalating composite filler piece of layered structure is required, such as silicate material.
if inorganic ion exchange capacity is too high, very high coulomb force that inorganic layers between the layers of inter-atomic forces is too big, is not conducive to insert of macromolecular chain. If the inorganic ion exchange capacity is too low, inorganic matter not effective interaction with polymers. Not enough to packing inorganic compatibility with polymer matrix. Can't get the same intercalated nanocomposites, appropriate ion exchange capacity, excellent mechanical properties and low price, makes the montmorillonite preparation of PLS nanocomposites become the preferred mineral.
more excellent articles: preparation of ion exchange material structure, click directly.
http://www。 csssld。 cn//html/2016/Info_1225/443。 HTML
nantong on suye's official website: http://www. csssld。 cn//
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