Modification method for basic magnesium sulfate whiskers

A magnesium sulfate whisker and basic technology, which is applied in the modification of basic magnesium sulfate whiskers and the field of whisker modification, can solve pollution, insufficient modification, poor uniformity of physical and chemical properties of basic magnesium sulfate whiskers, etc. problem, to achieve the effect of broad application prospects, good modification effect and good hydrophobicity

Inactive Publication Date: 2018-07-13
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(3) The method of surfactant or coupling agent treatment and the method of polymer coating generally use a large amount of solvent, which is easy to cause pollution
[0005] For this reason, Chinese invention CN 201610761122.1 provides a method for surface modification of basic magnesium sulfate whiskers, and puts forward targeted countermeasures. It uses plasma equipment and technology to alleviate the above problems to a certain extent, but adopts dry method Modified basic magnesium sulfate whiskers also have the problem of insufficient modification and poor uniformity of physical and chemical properties of modified basic magnesium sulfate whiskers

Method used

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  • Modification method for basic magnesium sulfate whiskers
  • Modification method for basic magnesium sulfate whiskers
  • Modification method for basic magnesium sulfate whiskers

Examples

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Effect test

Embodiment 1

[0033] The modification method of basic magnesium sulfate whisker of the present invention comprises the steps:

[0034] 1. Prepare KH-570 hydroalcoholic solution: take 3 parts of coupling agent KH-570, 7 parts of deionized water and 90 parts of absolute ethanol;

[0035] 2. Adjust the pH with anhydrous acetic acid: add anhydrous acetic acid twice the mass of the solution to the KH-570 hydroalcoholic solution to adjust the pH to 2-3;

[0036] 3. Sealed and stirred hydrolysis: adjust the temperature of the solution to 75°C, put in a magnet, seal with sealing paper and stir at a fixed stirring rate of 200r / min for 60min;

[0037] 4. Stand at room temperature: stand at room temperature (25±3°C) for 30 minutes;

[0038] 5. Adding whiskers: adding 15 parts of basic magnesium sulfate whiskers to the solution obtained above;

[0039] 6. Stirring for sealing reaction: adjust the temperature of the solution to 75°C, seal with sealing paper and stir at a rate of 100r / min for 3hrs;

...

Embodiment 2

[0043] Other steps are the same as in Example 1, except that the hydrolysis temperature in step 3 is 50°C.

Embodiment 3

[0045] Other steps are the same as in Example 1, except that the reaction temperature in step 5 is 50°C.

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Abstract

The invention discloses a modification method for basic magnesium sulfate whiskers. The modification method comprises the following steps: adopting deionized water and absolute ethyl alcohol to prepare KH-570 hydroalcoholic solution; regulating the pH (Potential of Hydrogen) of the hydroalcoholic solution by acetic anhydride, and carrying out sealing stirring hydrolysis and room-temperature standing; after the whiskers are added, carrying out stirring reaction, drying and high-temperature activation under a sealing condition. The modification method for the basic magnesium sulfate whiskers isvery simple, a great quantity of toxic or organic solvent does not need to be used, so that environment pollution is not basically caused, a modification effect is good, the modified basic magnesium sulfate whisker have good hydrophobicity, the hydrophobicity is obviously improved, and therefore, the modification method has a wide application prospect.

Description

technical field [0001] The invention relates to a method for modifying whiskers, in particular to a method for modifying basic magnesium sulfate whiskers, and belongs to the field of fiber surface treatment. Background technique [0002] Basic magnesium sulfate whiskers are also called magnesium oxysulfide crystals. The appearance is white powder. Under the microscope, it is a single needle-shaped or fan-shaped whisker. The main component is Mg(OH) 2 , also contains MgSO 4 , has the characteristics of good reinforcement effect, remarkable flame retardant performance, low price and no pollution, etc., and the optical refractive index is 1.53, which is the closest to the refractive index of various resins. Obstruction, so it is one of the ideal filler materials for plastics. [0003] However, basic magnesium sulfate whiskers and all micro-nano powders have the same problems in the actual application process, that is, the surface energy is high, they are in a thermodynamicall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K7/08
CPCC08K9/06C08K7/08
Inventor 唐明华刘文元赵小什
Owner XIANGTAN UNIV
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