• 专利标题:   High heat-conducting and high strength nano-composite material useful in heat dissipation fields including automobiles, computers and LEDs, comprises polydopamine modified graphene composite material and high-density polyethylene.
  • 专利号:   CN112778611-A, CN112778611-B
  • 发明人:   DING P, CAO W
  • 专利权人:   UNIV SHANGHAI
  • 国际专利分类:   C08K003/04, C08K009/04, C08L023/06, C09K005/14
  • 专利详细信息:   CN112778611-A 11 May 2021 C08L-023/06 202152 Pages: 8 Chinese
  • 申请详细信息:   CN112778611-A CN10002972 04 Jan 2021
  • 优先权号:   CN10002972

▎ 摘  要

NOVELTY - High heat-conducting and high strength nano-composite material comprises 0.1-1 wt.% polydopamine modified graphene composite material and 99-99.9 wt.% high-density polyethylene as raw material components. The nano-composite material is prepared by performing polymerization of raw material components, blending, discharging, secondary blending and wire drawing. USE - The nano-composite material is useful in heat dissipation fields including automobiles, computers, and LEDs. ADVANTAGE - The nano-composite material has excellent thermal conductivity and mechanical properties. The preparation method: enables the low-filler polydopamine-modified graphene to be uniformly dispersed in the matrix to reduce the interface thermal resistance, and has low overall cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the high heat-conducting and high strength nano-composite material, comprising (i) adding 32 wt.% dopamine monomer into graphene to perform in-situ self-polymerization of dopamine to prepare polydopamine-modified graphene, (ii) adding 0.1-1 wt.% polydopamine modified graphene into high-density polyethylene, melt blending in a torque rheometer at 160-180 degrees C, and banburying and mixing for 4 hours, and discharging to obtain high heat-conducting and high strength polydopamine modified graphene/high-density polyethylene blend, and (iii) pulverizing the high heat-conducting and high strength polydopamine modified graphene/high density polyethylene blend by secondary blending-drawing process, blending and drawing filler and the matrix for second time, more uniformly dispersing the polydopamine-modified graphene in the collective through the hydrogen bond with the surface functional groups to prepare low-filler polydopamine-modified graphene/high-density polyethylene composite material, i.e. nanocomposite material with high thermal conductivity and high strength.