• 专利标题:   Preparation of high-strength conductive graphene fiber, e.g. used to weave pure graphene fiber cloth, by dispersing graphene oxide in water, dissolving in solvent, extruding, soaking in coagulating liquid, placing in reductant, and drying.
  • 专利号:   CN102534869-A, CN102534869-B
  • 发明人:   GAO C, XU Z
  • 专利权人:   UNIV ZHEJIANG
  • 国际专利分类:   C01B031/04, D01F011/12, D01F011/14, D01F009/12
  • 专利详细信息:   CN102534869-A 04 Jul 2012 D01F-009/12 201313 Pages: 8 Chinese
  • 申请详细信息:   CN102534869-A CN10001537 05 Jan 2012
  • 优先权号:   CN10001537

▎ 摘  要

NOVELTY - Preparation of a high-strength conductive graphene fiber comprises dispersing (pts.wt.) graphene oxide (1) in water (100-1000) by stirring for 1-100 minutes at 1000-10000 revolutions/minute (rpm) to separate and oxidize graphene, dispersing in water, and air drying to obtain a large-size graphene oxide sheet; dissolving sheet (1) in solvent (5-100) to obtain a spinning solution liquid crystal sol; extruding, soaking in a coagulating liquid at 5-80 degrees C, washing, and drying to obtain a graphene oxide fiber; and placing in a reductant to reduce for 0.1-100 hours, washing, and drying. USE - Method for the preparation of a high-strength conductive graphene fiber (claimed) used to weave pure graphene fiber cloth, or functional fabric. ADVANTAGE - The graphene fiber has good electrical conductivity, excellent mechanical property, and good tenacity. The method is inexpensive, is simple, and green and environment-friendly. DETAILED DESCRIPTION - Preparation of a high-strength conductive graphene fiber comprises: (A) mixing (pts.wt.) expanded graphite (1), sulfuric acid (1-100), potassium persulfate (0.5-5), and phosphorus pentoxide (0.5-5), stirring at 25-100 degrees C, reacting for 1-10 hours, cooling to room temperature, diluting with deionized water, extracting with a filter membrane, washing to neutral with deionized water, and air drying for 10-50 hours to obtain an intercalation graphite; (B) mixing intercalation graphite (1), sulfuric acid (1-100), and potassium permanganate (0.5-5), stirring at - 10-50 degrees C, reacting for 0.1-10 hours, adding deionized water (10-2000) and hydrogen peroxide (0.1-10), stirring for 0.1-10 hours, extracting with filter membrane, repeatedly washing to neutral with deionized water, and air drying to obtain a primary graphite oxide; (C) mixing primary graphite oxide (1), sulfuric acid (1-100), and potassium permanganate (0.5-10), stirring at - 10-50 degrees C, reacting for 0.1-10 hours, adding deionized water (10-2000) and hydrogen peroxide (0.1-10), stirring for 0.1-10 hours, extracting with filter membrane, repeatedly washing to neutral with deionized water, and air drying to obtain graphene oxide; (D) dispersing graphene oxide (1) in water (100-1000) by stirring, rotating for 1-100 minutes at 1000-10000 rpm to separate and oxidize graphene, collecting the lower layer centrifugal product, dispersing in water, repeating the centrifugal separation for 1-5 times, and air drying to obtain a large-size graphene oxide sheet; (E) dissolving graphene oxide sheet (1) in solvent (5-100) to obtain a large-size graphene oxide spinning solution liquid crystal sol; (F) extruding graphene oxide spinning solution liquid crystal sol in 5-500 mu m spinning capillary at 100 mL/hour, soaking in a coagulating liquid at 5-80 degrees C 1-100 seconds to coagulate shreds, washing, and drying to obtain a graphene oxide fiber; and (G) placing the graphene oxide fiber in a reductant to reduce for 0.1-100 hours, washing, and drying.