Transparent photothermal compositions, production methods and uses thereof
AssigneeCity University of Hong Kong
InventorsDenvid LAU, Rui TANG
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Abstract
Disclosed herein is a transparent photothermal composition, which includes nonstoichiometric copper sulfide (Cu2-xS, 0<x≤1) nanoparticles dispersed in an acrylic resin, wherein the Cu2-xS (0<x≤1) nanoparticles are nanorods independently having an aspect ratio ranged from 2.2 to 3.6 and exhibit at least 95% absorption of a near-infrared (NIR) light ranged from 800 to 1,100 nm. Also disclosed herein are methods of producing the transparent photothermal composition and uses of the transparent photothermal composition in protecting a glass substrate from icing in a cold surrounding.
Claims9
A transparent photothermal composition comprising a nonstoichiometric copper sulfide (Cu2-x S, 0<x≤1) nanoparticle dispersed in an acrylic resin;
- wherein,
- the Cu2-xS (0<x≤1) nanoparticle is a nanorod with an aspect ratio of 2.2 and exhibits at least 95% absorption of a near-infrared (NIR) light ranged from 800 to 1,100 nm.
A method of producing a transparent photothermal composition comprising:
- (a) dissolving copper chloride and polyethylenimine in water to produce a first solution;
- (b) reacting the first solution with sodium sulfide at about 85° C. for 15 minutes;
- (c) cooling the product of step (b) to about 0° C. for 30 minutes;
- (d) adding acetone to the cooled product of step (c);
- (e) centrifuging the product of step (d) and collecting the precipitate thereof;
- (f) drying the precipitate of step (e) to produce a dispersion of nonstoichiometric copper sulfide (Cu2-xS, 0<x≤1) nanoparticles;
- (g) mixing the dispersion of Cu2-xS (0<x≤1) nanoparticles of step (f) with an acrylic resin at a ratio of 1:9 by weight to produce a mixture;
- and
- (h) sonicating the mixture of step (g) for 5 minutes to produce the transparent photothermal composition.
Dependencies are inferred from the claim text.