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Surface modification method for inorganic powder

An inorganic powder and surface modification technology, which is applied in the treatment of dyed polymer organic compounds and fibrous fillers, etc., can solve problems such as difficult industrialization, unrecognized compatibility, and complicated modification process, so as to reduce environmental pollution. Effects of pollution, low production cost and simple process

Inactive Publication Date: 2015-04-29
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The two methods of 3 and 4 have the disadvantages of complicated modification process and difficult industrial promotion
In this patent, calcium sulfate is surface activated and modified by adding stearic acid to improve the compatibility of calcium sulfate, corn starch and ethylene-vinyl alcohol copolymer, while improving the fluidity of the melt and the surface smoothness of the composite material. It can be seen that the patentee did not realize the compatibility effect of ethylene-vinyl alcohol copolymer on calcium sulfate and corn starch

Method used

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  • Surface modification method for inorganic powder
  • Surface modification method for inorganic powder

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Experimental program
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Effect test

Embodiment 1

[0024] Formula: 100 parts of inorganic powder, 1 part of ethylene-vinyl alcohol copolymer (the molar content of ethylene is 70%), and 5 parts of glycerin. The inorganic powder is nanometer calcium carbonate.

[0025] The surface modification method of inorganic powder comprises the following steps:

[0026] (1) Crush ethylene-vinyl alcohol copolymer into 20-mesh powder, dry at 90°C for 8 hours, and set aside;

[0027] (2) Dry the inorganic powder at 90°C for 1 hour;

[0028] (3) After uniformly mixing the dried ethylene-vinyl alcohol copolymer powder with glycerin, the dried inorganic powder was activated at 165°C for 10 min to obtain the surface-modified inorganic powder.

Embodiment 2

[0030] Formula: 100 parts of inorganic powder, 6 parts of ethylene-vinyl alcohol copolymer (30% ethylene molar content), 30 parts of glycerin. The inorganic powder is a superfine inorganic powder mixture of marble, potassium feldspar, albite and carbon black (mass ratio is 1:1:1:1).

[0031] The surface modification method of inorganic powder comprises the following steps:

[0032] (1) Crush ethylene-vinyl alcohol copolymer into 100-mesh powder, dry at 92°C for 8 hours, and set aside;

[0033] (2) Dry the inorganic powder at 120°C for 3 h;

[0034] (3) After mixing the dried ethylene-vinyl alcohol copolymer powder and glycerol evenly, the dried inorganic powder was activated at 200°C for 30 min to obtain the surface-modified inorganic powder.

Embodiment 3

[0036] Formula: 100 parts of inorganic powder, 3 parts of ethylene-vinyl alcohol copolymer (the molar content of ethylene is 44%), and 15 parts of glycerin.

[0037] The inorganic powder is superfine inorganic powder of calcium oxide, calcium hydroxide, kaolin, talcum powder and glass microspheres (mass ratio is 1:1:1:1:1).

[0038] The surface modification method of inorganic powder comprises the following steps:

[0039] (1) Crush ethylene-vinyl alcohol copolymer into 60-mesh powder, dry at 91°C for 8 hours, and set aside;

[0040] (2) Dry the inorganic powder at 105°C for 2 h;

[0041] (3) After uniformly mixing the dried ethylene-vinyl alcohol copolymer powder with glycerin, the dried inorganic powder was activated at 175°C for 20 minutes to obtain a surface-modified inorganic powder.

[0042] Interfacial tension (mJ / m) of inorganic powder and polypropylene after the process of the inventive method 2 )as follows:

[0043]

[0044] Add 40 parts of the modified inorga...

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Abstract

The invention discloses a surface modification method for inorganic powder. The method comprises the following steps: 100 parts of inorganic powder, 1-6 parts of 20-100 meshes of ethylene-vinyl alcohol copolymer and 5-30 parts of glycerinum are conducted activating treatment under the temperature of 165-200 DEG for 10-30 min to obtain surface modified inorganic powder. According to the invention, the consistency and dispersibility of the inorganic powder in polymer matrixes can be effectively improved, the surface modification method is simple, the requirements on equipment are low, and popularization and application are facilitated, and the surface modification method has obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of surface modification of inorganic powder, and relates to a preparation method of inorganic powder surface-modified by ethylene-vinyl alcohol copolymer. Specifically, it is a method of modifying inorganic powder with ethylene-vinyl alcohol copolymer to change the surface from hydrophilic to lipophilic. Background technique [0002] Inorganic powders such as calcium carbonate, calcium oxide, calcium hydroxide, aluminum hydroxide, aluminum oxide, magnesium hydroxide, magnesium carbonate, magnesium oxide, brucite, dolomite, calcite, basic magnesium carbonate, basic sodium carbonate Aluminum, wollastonite, kaolin, clay, mica, talc, silica, titanium dioxide, glass beads, marble, chalk, limestone, barium sulfate, nepheline, potassium feldspar, albite, graphite, carbon black, Minerals such as zinc oxide and zinc carbonate are widely used in polymer materials industries such as plastics, rubber, synthetic fibers,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/10C09C1/02C09C1/56C09C1/42C09C1/40C09C1/28C08L23/12C08K9/04
Inventor 朱德钦生瑜陈星生政天童庆松
Owner FUJIAN NORMAL UNIV
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