Wollastonite fiber with large length-diameter ratio and preparation method thereof

A wollastonite fiber, high aspect ratio technology, applied in glass manufacturing equipment, manufacturing tools and other directions, can solve the problems of high processing cost, complex production process, difficult operation, etc., to achieve stable product quality, simple production process, The effect of low production cost

Inactive Publication Date: 2011-11-23
安徽绿能技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent 201010109571 discloses a method of synthesizing calcium silicate hydrate under weak alkaline conditions by using calcium hydroxide and sodium silicate solution, then washing and drying, calcining in an inert atmosphere, and then using a coupling agent to process the powder Surface modification treatment, and finally fine processing to obtain wollastonite powder. The cost of artificially synthesized modified wollastonite fiber produced by this method is extremely high, which is 10-20 times higher than the processing cost of natural wollasto

Method used

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  • Wollastonite fiber with large length-diameter ratio and preparation method thereof
  • Wollastonite fiber with large length-diameter ratio and preparation method thereof
  • Wollastonite fiber with large length-diameter ratio and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] Preparation of cationic modifier:

[0039] That is, add 100 grams of water to the reactor in advance, add 116 grams of hexamethylene diamine and 101 grams of adipic acid to the reactor at a stirring speed of 120 rpm, heat up to 60°C, and react for 3 hours to obtain adipic acid and hexamethylene diamine Salt, the salt is a cationic modifier.

Example Embodiment

[0040] Example 2:

[0041] Preparation of wollastonite fiber with high aspect ratio:

[0042] a) Screening process: crush the ore sample to obtain primary products, and screen the primary products to obtain secondary wollastonite products with a particle size of 100-150 mesh;

[0043] b) Treatment process: add cationic modifier to the wollastonite secondary product, the weight ratio of cationic modifier to wollastonite secondary product is 1:100, and the pretreated wollastonite secondary product , Dried and dehydrated, then pulverized to a particle size of 320-350 mesh, and classified according to the GB / T 1345-2005 standard;

[0044] c) Post-treatment process: the graded wollastonite fiber is analyzed and tested, and the finished product of cationic high aspect ratio wollastonite fiber is obtained after being qualified.

Example Embodiment

[0045] Example 3:

[0046] Except b) the treatment step: adding a cationic modifier to the wollastonite secondary product, and the weight ratio of the cationic modifier to the wollastonite secondary product is 0.1:100, and the rest is the same as in Example 2.

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Abstract

The invention discloses a wollastonite fiber with a large length-diameter ratio and a preparation method thereof. The fiber contains 100 parts of wollastonite and 0.1-1.5 parts of cation modifier. The preparation method comprises a screening process, a treatment process and a post-treatment process. Compared with the prior art, a hydroxyl radical on the surface of the wollastonite in the invention actively reacts with the functional group to which the cation modifier is added so as to form a cation group, thereby achieving synchronous accomplishment of smashing and modification and greatly improving whiteness, planeness, opacity and printability of paper. According to the invention, the product wollastonite fiber disclosed by the invention can replace at most 30% of plant fiber, thereby effectively maintaining the physical strength of the paper and reducing the production cost; and the production process is simple, the product quality is stable, and the production cost is low.

Description

technical field [0001] The invention relates to the field of modification of inorganic materials, in particular to a cationic wollastonite fiber with high aspect ratio and a preparation method thereof. Background technique [0002] At present, the ultra-fine products produced by non-metallic wollastonite through mechanical processing and modification technology are widely used as fillers or coatings for high-end products such as papermaking, rubber, plastics, ceramics, paints, cosmetics, and aerospace industries. [0003] Chinese patent 201010109571 discloses a method of using calcium hydroxide and sodium silicate solution to synthesize calcium silicate hydrate under weakly alkaline conditions, then washing and drying, calcining treatment in an inert atmosphere, and then using a coupling agent to process the powder. Surface modification treatment, and finally fine processing to obtain wollastonite powder. The cost of artificially synthesized modified wollastonite fiber produ...

Claims

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Application Information

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IPC IPC(8): C03B37/00
Inventor 昝向明
Owner 安徽绿能技术研究院有限公司
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