Composite material based on two-dimensional nano carbon plate as well as preparation and application of composite material
A technology of two-dimensional carbon nanosheets and composite materials, which is applied in the fields of nanotechnology, nanotechnology, and nanotechnology for materials and surface science, and can solve the problems of inability to effectively guide treatment due to imaging effects, difficulties in preparing two-dimensional carbon materials, biological Compatibility and other problems, to achieve good magnetic resonance imaging capabilities, strong absorption, high photothermal conversion efficiency
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[0037] The synthetic method comprises the following steps:
[0038] a. Add the iodine-substituted acetylene shown in formula 1 and the ligand shown in formula 2 into methanol, ethanol or isopropanol, and the ligand and the iodine-substituted acetylene are arranged regularly to form The intermediate shown in formula 3;
[0039] b. The iodine atom on the iodine-substituted ethylenediyne in formula 3 interacts with the pyridine group nitrogen atom at the end of the ligand in formula 2 through a halogen bond, and topologically polymerizes to obtain a conjugated carbon-iodide polymer with the structure shown in formula Ⅰ;
[0040] Preferably, in step a, after the iodine-substituted acetylene represented by formula 1 and the ligand represented by formula 2 are added to methanol, ethanol or isopropanol, they are first placed at -30°C to -10°C for 5 days- After 10 days, put it under the condition of 10℃~30℃ for 5h-12h.
[0041] In some embodiments, carbonized derivatives were prepar...
Embodiment 1
[0047] Example 1: Nanocomposite preparation and performance characterization
[0048] The present invention uses N 1 , N 2 -Bis(2-(pyridin-3-yl)ethyl)oxamide as the host and diiodobutadiyne monomer as the guest, PIDA co-crystals were obtained by topological chemical polymerization. The eutectic formed has a metallic appearance, is well-aligned and highly aggregated. The iodine atom directly connected to the conjugated carbon skeleton is easily detached under various stimuli (Lewis base, temperature). Studies have shown that the loss of iodine substituents starts at 120 °C and the evaporation of the bulk occurs in the temperature range of 150 °C–170 °C. The present invention therefore attempts to remove host and iodine atoms by heating the eutectic to different temperatures. The carbonization process of the PIDA cocrystal was monitored by energy dispersive spectroscopy and Raman spectroscopy. The chemical formula of PIDA cocrystal is (C 4 I 2 ·C 16 h 18 N 4 o 2 )n. ...
Embodiment 2
[0051] Example 2: Photothermal conversion efficiency and hydroxyl radical generation ability of nanocomposites
[0052] Compared with common carbon nanomaterials such as graphene oxide, 2D carbon nanoflakes carbonized by PIDA showed stronger absorption in the near-infrared I region and near-infrared II region ( figure 2 in A). figure 2 In B and C, carbon sheets and nanocomposites were studied under 1064nm laser irradiation (1.5W cm -2 ) under different concentrations of photothermal heating curves. Both carbon flakes and nanocomposites exhibit remarkable concentration-dependent photothermal effects, where the temperature change is proportional to the sample concentration. The photothermal properties of the nanocomposites are consistent with those of the carbon sheets, indicating that the introduction of montmorillonite has no effect on the photothermal properties of the carbon nanoflakes. In contrast, the commonly used graphene oxide did not show the photothermal effect u...
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