Method of manufacturing a polymethylmethacrylate core shell nanocomposite optical plastic article
View Patent ↗A nanocomposite optical plastic article has a plastic host material with a temperature sensitive optical vector (x) and a core shell nanoparticulate material dispersed into the plastic host material. The core shell nanoparticulate material is characterized by a core defined by a nanoparticulate material which has a temperature sensitive optical vector (x 1 ) and a shell defined by a coating material layer coated onto the core. It is important to the invention that temperature sensitive vector (x 1 ) is directionally opposed to the temperature sensitive optical vector (x) and n shell <n plastic host <n core .
1. A nanocomposite optical plastic article, comprising:
a plastic host material having a refractive index n plastic host and a temperature sensitive optical vector x=dn plastic host /dT;
a core shell nano-sized particulate material having a refractive index n particulate and having a temperature sensitive optical vector x p =dn particulate /dT wherein the temperature sensitive optical vector x p of the core-shell nano-sized composite particulate is directionally opposed to temperature sensitive optical vector x of the plastic host material is dispersed into said plastic host material, said core-shell nano-sized particulate material having a core material with a refractive index n core and a shell material having a refractive index n shell , wherein the refractive index n shell is lower than the refractive indices of both the host material, n plastic host , and the core material, n core and wherein the optical vector of said plastic host material x and the optical vector of said core-shell nano-sized composite particulate x p are opposite in sign and additionally the refractive index of said shell material n shell is less than the refractive indices of both said core material n core and said plastic host material n host plastic material so that n shell <n plastic host <n core .
2. A nanocomposite optical plastic article as recited in claim 1 wherein said plastic host material is polymethylmethacrylate.
3. A nanocomposite optical plastic article as recited in claim 1 wherein said temperature sensitive optical vector of said shell material x shell =dn shell /dT is directionally opposed to said temperature sensitive optical vector x of said host material wherein said host material is a polymethylmethacrylate host material.
4. A nanocomposite optical plastic article as recited in claim 1 wherein said core material of said core-shell nano-sized composite particulate material is selected from the group consisting of: silica nanoparticles, magnesium oxide nanoparticles, zinc sulfide nanoparticles, zinc selenide, and cadmium sulfide.
5. A nanocomposite optical plastic article as recited in claim 4 wherein said core material of said core-shell nano-sized composite particulate material has a particle size of about 15 nm.
6. A nanocomposite optical plastic article as recited in claim 4 wherein said core material of said core-shell nano-sized composite particulate material has a particle size less than about 50 nm.
7. A nanocomposite optical plastic article as recited in claim 4 wherein core material of said core-shell nano-sized composite particulate material has a particle size less than about 20 nm.
8. A nanocomposite optical plastic article as recited in claim 1 wherein said shell material further comprises a coating layer selected from the group consisting of: amorphous silica, fluoropolymer, magnesium fluoride, and silsequinoxane materials.
9. A nanocomposite optical plastic article as recited in claim 1 wherein said shell material further comprises a coating layer of silica.
10. A nanocomposite optical plastic article as recited in claim 9 wherein said core material of said core-shell nano-sized composite particulate material further comprises a core material with a shell having a thickness in the range of about 5 nm to about 17 nm.
11. A nanocomposite optical plastic article as recited in claim 1 wherein said shell further comprises a magnesium fluoride coating layer.
12. A nanocomposite optical plastic article as recited in claim 1 wherein said core material of core material of said core-shell nano-sized composite particulate material further comprises a material selected from the group consisting of: potassium titano phosphate, aluminum oxide, magnesium aluminate, yttrium oxide, and calcium carbonate.