KR-20260063841-A - Nanocomposites, Photothermal material comprising the same, and Method for manufacturing the nanocomposites

Abstract

To achieve the above objectives, a nanocomposite according to one embodiment of the present invention may comprise a matrix; hydrothermal carbonaceous carbon (HTCC) particles distributed within the matrix; and copper nanoparticles distributed within the matrix. A photothermal material according to one embodiment of the present invention may include the nanocomposite. A method for manufacturing a nanocomposite according to one embodiment of the present invention may include the steps of: preparing a solution by mixing a saccharide and a copper salt; heating the solution to produce HTCC particles (Cu-HTCC) with copper nanoparticles immobilized thereon; dispersing the Cu-HTCC in a solvent and adding a matrix to produce a mixture; and curing the mixture.

Inventors

• 정용진
• 안태규
• 호세인 파타히모가담
• 김인호
• 키어나스레 단다파니

Assignees

• 국립한국교통대학교산학협력단

Dates

Publication Date

20260507

Application Date

20241031

Claims (11)

1. matrix; Hydrothermal carbonaceous carbon (HTCC) particles distributed within the above matrix; and A nanocomposite comprising copper nanoparticles distributed within the above matrix.
2. In Article 1, A nanocomposite characterized in that the above HTCC particles are derived from saccharides.
3. In Article 1, A nanocomposite characterized in that the above HTCC particles are derived from at least one selected from the group consisting of glucose, fructose, saccharose, oligofructose, and inulin.
4. In Article 1, A nanocomposite having the diameter of the HTCC particles of the above-mentioned particles as 2 to 10 μm.
5. In Article 1, The above copper nanoparticles are immobilized on HTCC particles, forming a nanocomposite.
6. In Article 1, A nanocomposite having an average grain size of copper nanoparticles of 20 nm to 60 nm.
7. In Article 1, The above nanocomposite is a porous nanocomposite.
8. A photothermal material comprising a nanocomposite according to any one of claims 1 to 7.
9. A photothermal material comprising a nanocomposite according to any one of claims 1 to 7.
10. A step of preparing a solution by mixing a saccharide and a copper salt; A step of heating the above solution to produce HTCC particles (Cu-HTCC) with immobilized copper nanoparticles; A step of preparing a mixture by dispersing the above Cu-HTCC in a solvent and adding a matrix; and A method for manufacturing a nanocomposite comprising the step of curing the above mixture.
11. In Article 10, Steps for preparing a sugar template; and A method for manufacturing a nanocomposite, further comprising the step of infiltrating the mixture into the sugar template.

Description

Nanocomposites, Photothermal material comprising the same, and Method for manufacturing the nanocomposites The present invention relates to a nanocomposite, a photothermal material containing the same, and a method for manufacturing the nanocomposite. Recently, interest in eco-friendly renewable energy has been rising due to the acceleration of global warming and limited resources. Solar energy is a sustainable energy source and a carbon-emission-free energy solution. In particular, active research is being conducted on photothermal materials that convert light energy into thermal energy in the field of solar thermal technology. As photothermal materials are core components of solar thermal technology that efficiently absorb light, there is a need to develop materials with excellent light absorption capabilities. Figure 1 (a) shows the synthesis process of an HTCC sample, and (b) shows the synthesis method of a Cu-HTCC sample. Figure 2(a) shows a method for manufacturing a filler/PDMS composite, and (b) shows a method for manufacturing a three-dimensional (3D) porous composite (sponge). Figures 3 (a) and (b) show the synthesis mechanisms of HTCC and Cu-HTCC, respectively. Figure 4 shows the UV-vis-NIR absorption data of the sponge. Figures 5(a) and (b) show the results of verifying the TE performance of a TE module, bare PDMS, and 2D composite after being exposed to darkness for 3 minutes and then exposed to sunlight for 7 minutes under 1 sun light, (c) shows the recorded surface temperature, and (d) is a bar graph of voltage and surface temperature of Cu-HTCC/PDMS composites of different thicknesses. Figures 6 (a) and (b) show the results of verifying the TE performance of a TE module, a bare PDMS sponge, and a 3D composite after being exposed to darkness for 3 minutes and then exposed to sunlight under 1 sun light for 7 minutes, (c) shows the recorded surface temperature, and (d) is a bar graph of the surface temperature of the TE module, the bare PDMS sponge, and the 3D composite. Figures 7 (a) and (b) show the mass change over time and the corresponding evaporation flux and efficiency for a bare PDMS sponge and a 3D composite under 1 sun light, (c) shows the TE performance for the composite sponge exposed to light for 1 hour during water evaporation, (d) shows the maximum value of the obtained voltage, and the inset in (d) shows the recorded surface temperature of the sponge. Figures 8 (a) and (b) show the results of water evaporation experiments under light irradiation at 1.5 and 2 sun intensities, (c) shows the results of seawater evaporation experiments for Cu-HTCC@PDMS under 1 sun illumination, and the inset of (c) shows the sponge surface at t=0 and 10 hours. Figure 9 illustrates the basic mechanism showing that the photothermal conversion efficiency increases due to the synergistic effect between the lattice relaxation of HTCC and the plasmonic localized heating of Cu NPs. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. A nanocomposite according to various embodiments of the present invention may comprise a matrix; hydrothermal carbonaceous carbon (HTCC) particles distributed within the matrix; and copper nanoparticles distributed within the matrix. The matrix may be polydimethylsiloxane (PDMS). HTCC particles may be carbon based on hydrothermal synthesis. HTCC particles may be distributed within a matrix. HTCC particles may be derived from saccharides. For example, HTCC particles may be derived from at least one selected from the group consisting of glucose, fructose, saccharose, oligofructose, and inulin. Preferably, HTCC particles may be derived from glucose. Specifically, HTCC particles may be formed when glucose is hydrolyzed into 5-hydroxymethylfurfural (HMF) under hydrolysis conditions, and the HMF undergoes a polycondensation process to aggregate nano-sized particles to form spherical bodies. The diameter of these HTCC particles may be 2 to 10 μm. Preferably, the diameter of the HTCC particles may be 3 to 7 μm. More preferably, the diameter of the HTCC particles may be about 5 μm. Copper nanoparticles can be distributed within the matrix. Specifically, copper nanoparticles may be immobilized on HTCC particles. Copper nanoparticles may be uniformly immobilized on HTCC particles. HTCC particles with immobilized copper nanoparticles can be uniformly distributed within the matrix. The average grain size of the copper nanoparticles can be 20 nm to 60 nm when calculated using the Scherrer formula. Preferably, the average grain size of the copper nanoparticles ca