Preparation method of nanocomposite films comprising gold nanopoarticle via photopolymerization technique

Abstract

It is related to a metal/polymer nanocomposite film comprising gold nanoparticle which has gold mirror feature, comprises acrylic based oligomer, acrylic based monomer, 2-mercapto thioxanthone which is an one-component type II. radicalic photoinitiator and chloroauric acid.

Claims

1. A metal/polymer nanocomposite film comprising gold nanoparticle which has the gold mirror feature wherein; raw materials are an acrylic based oligomer, an acrylic based monomer, a monocomponent type radical photoinitiator, 2-mercapto thioxanthone and chloroauric acid.

2. A nanocomposite film according to claim 1, wherein the acrylic based monomer is selected from the group consisting of poly(ethylene glycol) diacrylate, poly(ethylene glycol) monoacrylate, poly(ethylene glycol) methyl ether acrylate, trimethylpropane triacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, 2-methyl-1,3-propanediol diacrylate, neopentyl glycol propoxylate(2) diacrylate, trimethylpropane trimethacrylate, polyurethane acrylate and epoxy acrylate.

3. A nanocomposite film according to claim 1 characterized by comprising 76.4 wt % acrylic based oligomer, 19.1 wt % acrylic based monomer, 0.5 wt % 2-mercapto thioxanthone, and 4 wt % chloroauric acid.

4. A nanocomposite film according to claim 1 characterized by comprising 76 wt % acrylic based oligomer, 19 wt % acrylic based monomer, 1 wt % 2-mercapto thioxanthone, and 4 wt % chloroauric acid.

5. A method of producing film containing nanoparticles comprising gold metal/polymer nanocomposite which has gold mirror feature characterized by comprising the process steps of: placing 2-mercapto thioxanthone, chloroauric acid, an acrylic based oligomer and an acrylic-based monomer into a beaker at room temperature, b) leaving the beaker in step a) in an ultrasonic bath for approximately 15 minutes and mixing with a stirrer, c) obtaining a solution by applying a degas process in the ultrasonic bath to the beaker where the components in step a) become homogenous, d) coating the solution obtained in step c) onto a glass plate, and e) applying a curing process of the solution coated on the glass plate by exposure to UV rays in a UV-curing device.

6. The method according to claim 5, wherein the mixing process mentioned in the process step b) is performed via a probe type ultrasonic mixer.

7. The method according to claim 5, wherein the mixing process mentioned in the process step b) is performed for approximately 2 seconds.

8. A production method according to claim 5, wherein the acrylic based oligomer is selected from the group consisting of poly(ethylene glycol) diacrylate, poly(ethylene glycol) monoacrylate, poly(ethylene glycol) methyl ether acrylate, trimethylpropane triacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, 2-methyl-1,3-propanediol diacrylate, neopentyl glycol propoxylate(2) diacrylate, trimethylpropane trimethacrylate, polyurethane acrylate and epoxy acrylate.

Description

THE FIGURES WHICH HELP FOR UNDERSTANDING OF THE INVENTION

(1) FIG. 1: It is the IR conversion graph of the formulation in the presence and absence of AuNps (F1).

(2) FIG. 2: It is the heat flux of polymerization graph in the presence and absence of AuNps.

(3) FIG. 3: It is the polymerization rate graph in the presence and absence of AuNps.

(4) FIG. 4: It is the polymerization % conversion graph in the presence and absence of AuNps.

(5) FIG. 5: It is the view of UV-VIS spectrum obtained by being exposed of the F1A formulation in the presence of AuNps to UV light in different time periods.

(6) FIG. 6: It is the view of UV-VIS spectrum obtained by being exposed of the F2A formulation in the presence of AuNps to UV light in different time periods.

(7) FIG. 7a: It is the 1 m view of the F1A formulation in the presence of AuNps obtained as a result of SEM (Scanning Electron Microscope) analysis.

(8) FIG. 7b: It is the 500 nm view of the F1A formulation in the presence of AuNps obtained as a result of SEM (Scanning Electron Microscope) analysis.

(9) FIG. 7c: It is the 200 nm view of the F1A formulation in the presence of AuNps obtained as a result of SEM (Scanning Electron Microscope) analysis.

(10) FIG. 7d: It is the sectional view of the F1A formulation in the presence of AuNps obtained as a result of SEM (Scanning Electron Microscope) analysis.

(11) The drawings do not absolutely need to be scaled and the unnecessary details for understanding the present invention may be neglected. Other than that; the elements which are at least significantly identical or at least have significantly identical functions are shown with the same number.

Abbreviations

(12) F1: Not comprising gold

(13) F1A-F2A: Comprising gold

DETAILED DESCRIPTION OF THE INVENTION

(14) In this detailed description, the preferred arrangements of the disclosed preparation method of the nanocomposite films comprising gold nanoparticle via photopolymerization technique are described only for better understanding of the matter and such that it does not create any limiting effect.

(15) The invention is the method of preparation of metal/polymer nanocomposite film comprising gold nanoparticle which has gold mirror feature. In the said method; multifunctional acrylate and diluting monomer; 2-mercapto thioxanthone which is a one-component type II radicalic photoinitiator; the compound of chloroauric acid (HAuCl.sub.4) as the gold salt are used for performing reduction and polymerization processes. In addition to these, formation of cross linked polymer matrix and reduction of the ions to gold nanoparticles as in-situ are realized via photopolymerization method for production of nanocomposites at the room temperature fast and effectively.

(16) The disclosed production method of the invention comprises the formulation below. The number of said formulation is 2 with 2-mercapto thioxanthone used in different percentages.

(17) TABLE-US-00001 2-mercapto Acrylic Acrylic Formulation HAuCl.sub.4 thioxanthone Oligomer Monomer F1A %4 wt %0.5 wt %76.4 wt %19.1 wt (0.04 g) (0.005 g) (0.764 g) (0.191 g) F2A %4 wt %1 wt %76 wt %19 wt (0.04 g) (0.01 g) (0.76 g) (0.19 g)

(18) For preparation of cross linked polymer in the said formulation; poly(ethylene glycol) diacrylate, poly(ethylene glycol) monoacrylate, poly(ethylene glycol) methyl ether acrylate, trimethylpropane triacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, neopentyl glycol diacrylate, 1,6-hexanediol diacrylate, 2-methyl-1,3-propanediol diacrylate, neopentyl glycol propoxylate(2) diacrylate, trimethylpropane trimethacrylate, polyurethane acrylate or epoxy acrylate are used as acrylic based oligomer and acrylic based monomer.

(19) The Method of Preparation of Nanocomposite Film Comprising Gold Nanoparticle by Using the Percentages in the Desired Formulation:

(20) 1) Preparation of solution by using the formulation comprises the process steps of: putting 2-mercapto thioxanthone and HAuCl.sub.4 into a beaker at the room temperature, addition of the acrylic based oligomer and monomer, leaving the obtained acrylic based mixture into the ultrasonic bath at the room temperature for approximately 15 minutes, then, making it homogeneous by mixing for approximately 2 seconds via a probe type ultrasonic mixer, lastly, degassing with the ultrasonic bath.

(21) 2) Obtaining nanocomposite film via the solution is: coating the obtained solution on glass plate such that its thickness is 40 micrometer, being exposed to UV light via UV-curing device.

(22) ##STR00001##
Experimental Studies:

(23) After the disclosed formulation of the invention was synthesized, the efficiency for obtaining the invention was calculated by using of FTIR (Fourier Transform Infrared) spectra. FTIR spectra as a result of being exposed of the formulations to light for specific time periods were taken and the decrease seen at the peak at 1640 cm.sup.1 was recorded. Percentage conversion was calculated (FIG. 1). The conversion percentages of the formulations comprising Au salt were obtained lower as expected.

(24) Heat flux of polymerization (FIG. 2), rate of polymerization (FIG. 3), conversion percentage (FIG. 4) graphs were analyzed by using of Photo-DSC method (Differential Scanning calorimetry). Here, in the inert atmosphere it was seen that the conversion percentage of the formulation comprising Au nanoparticle is more.

(25) For the characterization of the gold nanoparticles in the nanocomposite material, UV-VIS spectroscopy were used (FIGS. 5, 6 and 7). When the spectra were analyzed, formation of nanoparticles confirmed by absorption between at 510-570 nm.

(26) The formation of Au nanoparticles has been proven also as in the literature. The absorption range gives us the idea about the nanoparticle size range.

(27) When the SEM image is analyzed, the nanoparticles obtained in the formulation with number 1 are seen. The nanoparticles are mostly in spherical shape and have a diameter of 30-40 nm. For the formulation with number 1; 1 m is in the FIG. 7a, 500 nm is in the FIG. 7b, 200 nm is in the FIG. 7c, sectional view is in the FIG. 7d.

(28) Also the SEM graphs confirmed the UV-VIS results. It shows that the nanoparticle size stability and the distribution of nanoparticles are regular and there is very little agglomeration.

REFERENCES

(29) 1okbalan, L., Arsu, N., Yaci, Y., Jockush, S., Turro, J. N., (2003). 2-Mercaptothioxanthone as a Novel Photoinitiator for Free Radical Polymerization, Macromolecules, Vol. 36, No. 8, 2003. 2Yaci, Y., Sangermano, M., Rizza, G., (2008). In situ synthesis of gold cross-linked poly(ethylene glycol) nanocomposites by photoinduced electron transfer and free radical polymerization processes, Chem. Commun., 2008, 2771-2773. 3Balan, L., Melinte, V., Buruiana, T., Schneider, R., and Vidal, L., Controlling the morphology of gold nanoparticles synthesized photochemically in a polymer matrix through photonic parameters, Nanotechnology 23 (2012) 415705. 4Buruiana, E. C., Chibac, A. L., Buruiana, T., Melinte, V., Balan, L., A benzophenone-bearing acid oligodimethacrylate and its application to the preparation of silver/gold nanoparticles/polymer nanocomposites J Nanopart Res (2013) 15:1335.