Methods and systems for recycling carbon fiber

Patent metadata

Field	Value
Publication number	US-2017203384-A1
Application number	US-201415313873-A
Country	US
Kind code	A1
Filing date	May 30, 2014
Priority date	May 30, 2014
Publication date	Jul 20, 2017
Grant date	—

Abstract

Methods for recycling carbon fibers are disclosed. The methods can include providing at least one object comprising carbon fibers and resin, and contacting the object with at least one light beam to produce recycled carbon fibers. Systems that implement the disclosed methods are also provided.

First claim

1 . A method of recycling carbon fibers, the method comprising:
providing at least one object comprising carbon fibers and resin; irradiating the at least one object with at least one light beam to produce recycled carbon fibers; and recovering the recycled carbon fibers from the at least one object.

2 - 7 . (canceled)

8 . The method of claim 1 , further comprising at least one support surface including a sample stage configured to move three-dimensionally.

9 . The method of claim 1 , wherein irradiating the at least one object with the at least one light beam is performed in the absence of one or more solvents.

10 . The method of claim 1 , wherein irradiating the at least one object, with the at least one light beam is performed in the absence of mechanical shearing or chopping.

11 . (canceled)

12 . The method of claim 1 , wherein irradiating the at least one object with the at least one light beam comprises applying the at least one light beam to the at least one object for about 3 minutes to about 7 minutes.

13 . The method of claim 1 , wherein the at least one light beam is produced from a laser.

14 . (canceled)

15 . The method of claim 13 , wherein the at least one light beam produced from the laser has a power of about 50 W to about 200 W.

16 . The method of claim 13 , wherein the at least one light beam produced from the laser has a temperature of about 300° C. to about 600° C.

17 . The method of claim 13 , wherein the at least one light beam produced from the laser has a wavelength of about 1.0 μm to about 10.7 μm.

18 . (canceled)

19 . The method of claim 13 , wherein the laser is a carbon dioxide laser, an optical fiber laser, or an argon ion laser.

20 . (canceled)

21 . (canceled)

22 . The method of claim 1 , further comprising expanding the at least one light beam irradiating the at least one object.

23 . (canceled)

24 . The method of claim 1 , further comprising adjusting an angle of the at least one light beam irradiating the at least one object.

25 . The method of claim 24 , wherein adjusting the angle of the at least one light beam comprises adjusting the angle of the at least one light beam using a reflective mirror.

26 . (canceled)

27 . The method of claim 1 , further comprising moving the at least one support surface relative to the at least one light beam at a velocity of about 1 cm/min to about 2 cm/min.

28 . The method of claim 1 , further comprising moving the at least one light beam relative to the at least one support surface at a velocity of about 1 cm/min to about 5 cm/min.

29 . (canceled)

30 . (canceled)

31 . The method of claim 1 , further comprising removing resin from the recycled carbon fibers by hot airflow.

32 . (canceled)

33 . (canceled)

34 . A system for recycling carbon fibers, the system comprising:
at least one support surface configured to attach to at least one object, the at least one object comprising carbon fibers and resin; at least one light source configured to irradiate the at least one object with at least one light beam to produce recycled carbon fibers; and
at least one device configured to remove the recycled carbon fibers from the at least one object.

35 - 37 . (canceled)

38 . The system of claim 34 , wherein the at least one support surface comprises a sample stage configured to move three-dimensionally.

39 . (canceled)

40 . (canceled)

41 . The system of claim 34 , wherein the at least one light source is a laser, and the at least one light beam is produced from the laser.

42 . (canceled)

43 . The system of claim 41 , wherein the at least one light beam produced from the laser has a power of about 50 W to about 200 W.

44 . The system of claim 41 , wherein the at least one light beam produced from the laser has a temperature of about 300° C. to about 600° C.

45 . The system of claim 41 , wherein the at least one light beam produced from the laser has a wavelength of about 1.0 μm to about 10.7 μm.

46 . (canceled)

47 . The system of claim 41 , wherein the laser is a carbon dioxide laser, an optical fiber laser, or an argon ion laser.

48 . (canceled)

49 . (canceled)

50 . The system of claim 34 , further comprising a beam expander configured to expand the at least one light beam irradiating the at least one object.

51 . The system of claim 34 , further comprising a reflective mirror configured to adjust an angle of the at least one light beam irradiating the at least one object.

52 . (canceled)

53 . The system of claim 34 , wherein the at least one support surface is configured to move relative to the at least one light beam at a velocity of about 1 cm/min to about 2 cm/min.

54 . The system of claim 34 , wherein the at least one light beam is configured to move relative to the at least one support surface at a velocity of about 1 cm/min to about 5 cm/min.

55 . The system of claim 34 , wherein the at least one light beam is configured to contact air between the recycled carbon fibers and the at least one light source to provide a hot airflow to the recycled carbon fibers to remove the resin.

56 . (canceled)

57 . The method of claim 1 , wherein the recycled carbon fibers that are recovered from the at least one object are substantially free of the resin.

58 . The system of claim 34 , wherein the at least one device configured to remove the recycled carbon fibers from the at least one object comprises a smooth plate.

59 . A method of recycling carbon fibers, the method comprising:
providing at least one object comprising carbon fibers and resin on at least one support surface; irradiating the at least one object with at least one light beam to produce recycled carbon fibers; at least one of:
moving the at least one support surface relative to the at least one light beam at a velocity of about 1 cm/min to about 2 cm/min; or
moving the at least one light beam relative to the at least one support surface at a velocity of about 1 cm/min to about 5 cm/min;
removing resin from the recycled carbon fibers by hot air flow; and recovering the recycled carbon fibers from the at least one object.

Assignees

• Univ East China Science & Tech

Inventors

• Zhao Chongjun
• Huang Youfu
• Dong Jianbo
• Zhang Jinchao
• Qian Xiuzhen
• Xu Yunlong

Classifications

• B29B17/02 Primary

  Separating plastics from other materials · CPC title

• B01J19/121

  Coherent waves, e.g. laser beams (lasers per se H01S3/00) · CPC title

• B23K26/0006 Primary

  taking account of the properties of the material involved (B23K26/32, B23K26/40 take precedence) · CPC title

• D01F9/12

  Carbon filaments; Apparatus specially adapted for the manufacture thereof · CPC title

• B23K26/083

  Devices involving movement of the workpiece in at least one axial direction · CPC title