التفاصيل البيبلوغرافية
| العنوان: |
TECHNIQUE FOR STABILIZING SOLUTIONS OF TITANIUM DIOXIDE NANOPARTICLES IN ACRYLATE POLYMERS BY MEANS OF SHORT-PULSED UV LASER IRRADIATION |
| Document Number: |
20130012650 |
| تاريخ النشر: |
January 10, 2013 |
| Appl. No: |
13/636990 |
| Application Filed: |
March 28, 2011 |
| مستخلص: |
A method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent includes mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent, so as to obtain the colloid solution. The colloid solution is subjected to a stabilization treatment suitable for preventing or reducing nanoparticle aggregation, the treatment includes irradiating the colloid solution with pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles. |
| Inventors: |
Carzino, Riccardo (Serra Ricco', IT); Pignatelli, Francesca (Genova, IT); Scotto, Marco (Genova, IT); Torre, Bruno (Stella S. Martino, IT); Caputo, Gianvito (Mola di Bari, IT); Cozzoli, Pantaleo Davide (Lecce, IT); Athanassiou, Athanassia (Arnesano, IT); Cingolani, Roberto (Arnesano, IT) |
| Assignees: |
FONDAZIONE ISTITUTO ITALIANO DI TECNOLOGIA (Genova, IT) |
| Claim: |
1. A method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent, comprising: mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent to obtain said colloid solution; wherein said colloid solution is submitted to a stabilization treatment for preventing or reducing nanoparticle aggregation, said treatment comprising irradiating the colloid solution with a pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles. |
| Claim: |
2. A method according to claim 1, wherein said nanoparticles are provided in dispersed form in an organic solvent. |
| Claim: |
3. A method according to claim 1, wherein said coherent light is a laser light. |
| Claim: |
4. A method according to claim 1, wherein said wavelength is equal to or less than 355 nm. |
| Claim: |
5. A method according to claim 1, wherein said coherent light is irradiated with pulses having a pulse duration less than 1 ns. |
| Claim: |
6. A method according to claim 5, wherein said coherent light is irradiated with pulses having a pulse duration less than 100 ps. |
| Claim: |
7. A method according to claim 1, wherein said acrylic resin is chosen from the group consisting of homopolymers or copolymers of acrylic and/or methacrylic acid, and homopolymers or copolymers of alkyl esters of the acrylic and/or methacrylic acid, said acrylic resin being chosen in such a way as to be transparent to the wavelength of the irradiated coherent light. |
| Claim: |
8. A method according to claim 1, wherein said coherent light is irradiated onto the colloid solution in such a way as the energy density times irradation time absorbed by the colloid solution is less than 5000 mJs/cm2. |
| Claim: |
9. A method for producing an acrylic resin film doped with titanium dioxide nanoparticles, comprising the preparation of a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent, wherein the said preparation comprises a method according to claim 1. |
| Claim: |
10. A method according to claim 9, wherein the weight concentration of titanium dioxide in the acrylic resin of the film is less than 20%. |
| Current U.S. Class: |
524/560 |
| Current International Class: |
08; 08; 82 |
| رقم الانضمام: |
edspap.20130012650 |
| قاعدة البيانات: |
USPTO Patent Applications |