Recycling surface modification method for aluminum oxide powder high in water dispersion stability

A technology of alumina powder and dispersion stability, applied in the field of materials, can solve the problems of complicated, difficult and low efficiency of powder surface modification process, and achieve controllable surface coverage and surface modification effect, preventing Effects of condensation reactions
CN106590067AActive Publication Date: 2017-04-26溧阳极盾新材料科技有限公司
8 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
溧阳极盾新材料科技有限公司
Publication Date
2017-04-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of materials and discloses a recycling surface modification method for aluminum oxide powder high in water dispersion stability. According to the method, compound modifier generation reaction and grafting reaction of aluminum oxide powder are both carried out in organic solvents, condensation reaction of a silane coupling agent is effectively prevented, aluminum oxide surface modified molecular layers are more regular, and accordingly surface coating rate and surface modification effects of the aluminum oxide powder are controllable; aiming at waterborne media different in property, favorable compatibility and dispersion stability of the modified aluminum oxide powder in water or waterborne media can be achieved through compound modifier molecular design; appropriate solvents are selected to realize recovery and recycling of residual compound modifier, reactants and solvents, and material closed cycle, cleanness and environment friendliness (namely freeness of waste liquid generation and discharge) in a whole surface modification process are realized.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for surface modification of alumina powder with high water dispersion stability and belongs to the field of material technology. Background technique

[0002] Alumina ultrafine powder not only has the unique properties shared by ultrafine powders, such as special electrical, magnetic and optical properties, but also has excellent properties such as high hardness, wear resistance and high temperature resistance, so it is widely used in semiconductors, ceramics , Abrasives and optical materials and other high-tech fields. However, due to the large specific surface area and surface energy of the alumina ultrafine powder, the surface is charged, and the surface groups are abundant, the agglomeration between the particles is very serious, so that it often disperses unevenly or occurs under the medium. The sinking phenomenon will affect the dispersion stability and use effect of the suspension. Therefore, improving the com...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More