Granted Patent B2

US 12,428,537 · App. 18/531,485 · Granted Sep 30, 2025

Inventors: Zhipeng Dai (Ningde, CN); Miaomiao Ren (Ningde, CN); Xianwei Yang (Ningde, CN); Yang Lu (Ningde, CN); Xin Zhang (Ningde, CN)

Assignee: CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

C08K3/041C08F290/062C08K2201/001

Abstract

Claims (63)

1. A composite conductive agent, comprising:

an organic polymer, and

a hydroxylated carbon nanotube combined with the organic polymer;

wherein:

the organic polymer comprises a polymer having a structural formula represented by formula (1),

in the formula (1), m is an integer ranging from 2500 to 20000, and R 1 is a polymer structure comprising an ester group and a nitrile group; and

the polymer structure comprises a polymer structure having a structural formula represented by formula (2),

in the formula (2), ** represents a connection site of the polymer structure, p is an integer ranging from 1000 to 5000, q is an integer ranging from 1000 to 15000, f is an integer ranging from 500 to 4000, 2≤n≤200, each R 2 is independently one selected from

 represents a connection site of R 2 , and M + is one selected from Na + , K + , Li + and NH 4 + .

2. The composite conductive agent according to claim 1 , wherein the composite conductive agent satisfies at least one of following conditions:

(1) the hydroxylated carbon nanotube is combined with the organic polymer through an ester group and/or a hydrogen bond; and

(2) at least one hydroxyl group is attached to a surface of the hydroxylated carbon nanotube.

3. The composite conductive agent according to claim 1 , wherein the composite conductive agent satisfies at least one of following conditions:

(1) in the composite conductive agent, a weight percentage content of the organic polymer is 50% to 90%; and

(2) the hydroxylated carbon nanotube comprises a hydroxylated single-walled carbon nanotube and/or a hydroxylated multi-walled carbon nanotube.

4. A method for preparing the composite conductive agent according to claim 1 , comprising:

enabling acrylate and acrylic acid to react with the hydroxylated carbon nanotube to obtain a pre-reacted mixture; and

polymerizing the pre-reacted mixture with acrylonitrile and a polyether polyol monoacrylate to form the organic polymer combined with the hydroxylated carbon nanotube, thereby obtaining the composite conductive agent.

5. The method according to claim 4 , wherein enabling the acrylate and the acrylic acid to react with the hydroxylated carbon nanotube comprises:

contacting the acrylate and the acrylic acid with the hydroxylated carbon nanotube for reaction, under action of a polymerization aid.

6. The method according to claim 5 , wherein the method satisfies at least one of following conditions:

(1) the acrylate comprises at least one of sodium acrylate, potassium acrylate, lithium acrylate, and ammonium acrylate; and

(2) the polymerization aid comprises sodium dodecylsulfonate and/or sodium dodecylsulfate.

7. The method according to claim 5 , wherein contacting the acrylate and the acrylic acid with the hydroxylated carbon nanotube for reaction, under the action of the polymerization aid comprises:

contacting and mixing the polymerization aid, the acrylate, the acrylic acid, with the hydroxylated carbon nanotube in water to form a mixed solution; and

performing a heat treatment on the mixed solution, to subject the acrylate, the acrylic acid, and the hydroxylated carbon nanotube with a prepolymerization reaction.

8. The method according to claim 7 , wherein the method satisfies at least one of following conditions:

(1) in the mixed solution, a weight percentage content of the acrylate is 3% to 25%;

(2) in the mixed solution, a weight percentage content of the acrylic acid is 5% to 40%;

(3) in the mixed solution, a weight percentage content of the hydroxylated carbon nanotube is 1% to 10%;

(4) in the mixed solution, a weight percentage content of the polymerization aid is 2% to 5%; and

(5) a temperature of the heat treatment is 50° C. to 85° C.

9. The method according to claim 4 , wherein polymerizing the pre-reacted mixture with the acrylonitrile and the polyether polyol monoacrylate comprises:

contacting and polymerizing the pre-reacted mixture with the acrylonitrile and the polyether polyol monoacrylate, under action of a polymerization initiator, to form the polymer structure.

10. The method according to claim 9 , wherein the method satisfies at least one of following conditions:

(1) the polyether polyol monoacrylate comprises at least one of a polyethylene glycol acrylate, a polypropylene glycol acrylate, and a polytetrahydrofuran glycol acrylate; and

(2) the polymerization initiator comprises at least one of potassium sulfate, potassium persulfate, and sodium persulfate.

11. The method according to claim 9 , wherein the step of contacting and polymerizing the pre-reacted mixture with the acrylonitrile and the polyether polyol monoacrylate under the action of the polymerization initiator comprises:

contacting and mixing the polymerization initiator, the acrylonitrile, and the polyether polyol monoacrylate in a solution of the pre-reacted mixture to obtain a mixed solution; and

performing a heat treatment on the mixed solution, to subject the acrylonitrile, the polyether polyol monoacrylate, and the pre-reacted mixture with a polymerization reaction.

12. The method according to claim 11 , wherein the method satisfies at least one of the following conditions:

(1) in the mixed solution, a weight percentage content of the polymerization initiator is 1% to 3%;

(2) in the mixed solution, a weight percentage content of the acrylonitrile is 5% to 30%;

(3) in the mixed solution, a weight percentage content of the polyether polyol monoacrylate is 10% to 40%; and

(4) a temperature of the heat treatment is 50° C. to 85° C.

13. The method according to claim 4 , further comprising:

preparing the polyether polyol monoacrylate, comprising contacting acrylic acid with a polyether polyol for esterification reaction, whereby obtaining the polyether polyol monoacrylate.

14. The method according to claim 13 , wherein the method satisfies at least one of following conditions:

(1) the polyether polyol comprises at least one of a polyethylene glycol, a polypropylene glycol, and a polytetrahydrofuran glycol; and

(2) a polymerization degree of the polyether polyol is 2 to 200.

15. The method according to claim 13 , wherein contacting the acrylic acid with the polyether polyol for esterification reaction comprises:

contacting and mixing the acrylic acid and the polyether polyol in water to form a mixed solution; and

performing a heat treatment on the mixed solution to obtain a solution of the polyether polyol monoacrylate.

16. The method according to claim 15 , wherein the method satisfies at least one of following conditions:

(1) a molar ratio of the acrylic acid to the polyether polyol is (5:1) to (1:1); and

(2) a temperature of the heat treatment is 50° C. to 85° C.

17. The method according to claim 15 , further comprising, before performing the heat treatment on the mixed solution:

adding a catalyst and a polymerization inhibitor to the third mixed solution.

18. The method according to claim 17 , wherein the method satisfies at least one of following conditions:

(1) in the mixed solution, a weight percentage content of the catalyst is 3% to 10%; and

(2) in the mixed solution, a weight percentage content of the polymerization inhibitor is 1% to 5%.

19. The method according to claim 15 , further comprising, after performing the heat treatment on the mixed solution:

purifying the solution of the polyether polyol monoacrylate to obtain the polyether polyol monoacrylate.

Assignments (2)

Continuity (2)

References Cited (11)