• 专利标题:   Producing carbon fiber-boron nitride composite, comprises e.g. surface treating carbon fiber with acid solution e.g. nitric acid, adding crosslinking agent and graphene oxide containing amine group to surface-treated carbon fiber, reacting.
  • 专利号:   KR2102594-B1
  • 发明人:   KIM W S, DOW H S, SHIN D, SEONG T W, HWANG J
  • 专利权人:   KOREA INST CERAMIC ENG TECHNOLOGY
  • 国际专利分类:   C01B021/064, D06C007/00, D06M101/40, D06M011/74
  • 专利详细信息:   KR2102594-B1 21 Apr 2020 D06M-011/74 202037 Pages: 13
  • 申请详细信息:   KR2102594-B1 KR127861 25 Oct 2018
  • 优先权号:   KR127861

▎ 摘  要

NOVELTY - Producing carbon fiber-boron nitride composite, comprises: (a) surface treating carbon fiber with at least one acid solution including nitric acid and sulfuric acid to form hydroxy or carboxy functional groups on the surface of the carbon fiber; (b) adding a crosslinking agent containing an amine group to the surface-treated carbon fiber and reacting; (c) adding graphene oxide to the carbon fiber reacted with a crosslinking agent containing the amine group and reacting the graphene oxide to be coated on the carbon fiber; and (d) flowing a gas containing nitrogen into boron trioxide powder and the graphene oxide-coated carbon fiber contained in a crucible, and reacting while being heat-treated such that the graphene oxide is replaced with boron nitride. USE - The method is useful for producing carbon fiber-boron nitride composite. ADVANTAGE - The carbon fiber-boron nitride composite has excellent crystallinity, can be suppressed from being oxidized in a high temperature oxidizing atmosphere of carbon atoms constituting the carbon fiber, and can withstand at ultra-high temperature oxidizing atmosphere. DETAILED DESCRIPTION - Producing carbon fiber-boron nitride composite, comprises: (a) surface treating carbon fiber with at least one acid solution including nitric acid and sulfuric acid to form hydroxy or carboxy functional groups on the surface of the carbon fiber; (b) adding and reacting a crosslinking agent containing an amine group to the surface-treated carbon fiber; (c) adding graphene oxide to the carbon fiber reacted with a crosslinking agent containing the amine group and reacting the graphene oxide to be coated on the carbon fiber; and (d) flowing a gas containing nitrogen into boron trioxide powder and the graphene oxide-coated carbon fiber contained in a crucible, and reacting while being heat-treated such that the graphene oxide is replaced with boron nitride. The step (d) comprises placing the boron trioxide powder under a crucible and placing the graphene oxide-coated carbon fiber on the boron trioxide powder, and performing the heat treatment at 550-1000 degrees C higher than the melting point of the boron trioxide powder. The crosslinking agent containing the amine group is cadaverine and/or para-phenylenediamine.