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Hydrophobic oleophylic modified synthetic mica and preparation method thereof

A technology for synthesizing mica and hydrophobic and lipophilic, which is applied in the field of mica, can solve problems such as difficulty in controlling the uniformity of product quality, difficulty in mixing uniform surface treatment agents, and high energy consumption costs, and achieve uniform hydrophobic and lipophilic effects, good uniformity, and The effect of high pass rate

Active Publication Date: 2014-12-10
梅州市三宝光晶云母科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthetic mica powder modified by this method has excellent hydrophobic and lipophilic properties, and its water contact angle is 105-130°, and can be well dispersed in n-hexane. However, the process adopted by this method requires two high-temperature treatments. Moreover, it is difficult to mix the pretreated mica powder and a small amount of surface treatment agent evenly, which makes the process complicated in mass production, it is difficult to control the uniformity of product quality, and the cost of energy consumption is significantly increased.

Method used

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  • Hydrophobic oleophylic modified synthetic mica and preparation method thereof
  • Hydrophobic oleophylic modified synthetic mica and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The first step, in parts by mass, add 5 parts of synthetic mica and 45 parts of water in the reactor, stirring at room temperature (rotating speed is 200rpm) for 10 minutes;

[0033] The second step, in parts by mass, adds 5.6 parts of ammonium bicarbonate to the reactor described in the first step, and adopts ultrasonic dispersion treatment for 10 minutes at room temperature (ultrasonic frequency and power are respectively 40kHz and 350W), so that the synthetic mica Uniform contact between particles and ammonium bicarbonate molecules for ion exchange to occur;

[0034] In the third step, in parts by mass, add 0.3 parts of hexadecyltrimethoxysilane and 2.7 parts of methanol solution in the reactor, and use ultrasonic dispersion for 20 minutes at room temperature (ultrasonic frequency and power are 50kHz and 450W respectively) , making the ion-exchanged synthetic mica particles contact with hexadecyltrimethoxysilane molecules uniformly, and then carry out solid-liquid se...

Embodiment 2

[0037] In the first step, in parts by mass, 10 parts of synthetic mica and 90 parts of water are added to the reactor, and stirred at room temperature for 5 minutes (rotating speed is 250rpm);

[0038] In the second step, add 11.2 parts of ammonium bicarbonate to the reactor described in the first step, and use ultrasonic dispersion treatment for 10 minutes at room temperature (ultrasonic frequency and power are respectively 40kHz and 350W), so that the synthetic mica particles and ammonium bicarbonate molecules Uniform contact between them for ion exchange to occur;

[0039] In the third step, add 0.5 parts of dodecyltrimethoxysilane and 4.5 parts of methanol solution in the reactor, and use ultrasonic dispersion treatment for 10 minutes at room temperature (ultrasonic frequency and power are 50kHz and 450W respectively), so that ion exchange occurs The synthetic mica particles are evenly contacted with dodecyltrimethoxysilane molecules, and then solid-liquid separation is ca...

Embodiment 3

[0042] In the first step, in parts by mass, 7 parts of synthetic mica and 60 parts of water are added to the reactor, and stirred at room temperature for 8 minutes (rotating speed is 150rpm);

[0043] In the second step, add 6.8 parts of ammonia water to the reactor described in the first step, and adopt ultrasonic dispersion treatment for 15 minutes at room temperature (ultrasonic frequency and power are respectively 40kHz and 300W), so that the uniform contact between the synthetic mica particles and the ammonia water molecules for ion exchange to occur;

[0044] In the third step, add 0.5 parts of octyltriethoxysilane and 4.5 parts of ethanol solution in the reactor, and use ultrasonic dispersion treatment for 25 minutes at room temperature (ultrasonic frequency and power are respectively 50kHz and 450W), so that the ion-exchanged Synthetic mica particles are uniformly contacted with octyltriethoxysilane molecules, and then solid-liquid separation is performed to obtain a w...

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Abstract

The invention discloses hydrophobic oleophylic modified synthetic mica and a preparation method thereof. The method comprises the following steps: mixing synthetic mica with water, adding an ammonium ion pretreatment agent and a surface treatment agent, ultrasonically dispersing for enabling the synthetic mica, the pretreatment agent and the surface treatment agent to be in uniform contact with each other, performing solid-liquid separation to obtain a wet solid phase, and finally drying the wet solid phase to obtain the modified synthetic mica. According to the preparation method, the drying and sintering processes of the synthetic mica are simultaneously carried out, so that the process is simplified, the two-time heating energy consumption process required for carrying out the drying and sintering processes respectively is avoided, the heat energy required for the modification process is efficiently utilized, and the production cost is reduced. The obtained synthetic mica powder is excellent in hydrophobic and oleophylic performances, has the water contact angle of 120-130 degrees and the organic solvent contact angle of 0-15 degrees, can be well dispersed in n-hexane, and well meets the requirements of cosmetic, coating, plastic and rubber industries.

Description

technical field [0001] The invention relates to a mica, in particular to a hydrophobic and lipophilic modified synthetic mica and a preparation method thereof; it is a process for synthesizing the hydrophobic and lipophilic modification of the mica. technical background [0002] Synthetic mica, also known as artificial mica, belongs to silicate compounds and is composed of K 2 CO 3 , MgO, Al 2 o 3 , SiO 2 and K 2 SiF 6 It is a mica crystal formed by accurate measurement of raw materials in a certain proportion, uniform batching, electric furnace smelting, cooling and crystallization, and its chemical formula is KMg 3 (AlSi 3 o 10 ) F 2 . Compared with natural mica, such as widely used muscovite (chemical formula is KAl 2 (AlSi 3 o 10 )(OH) 2 ) and phlogopite (chemical formula KMg 3 (AlSi 3 o 10 )(OH) 2 ), it is obvious that OH in synthetic mica - (hydroxyl) by F - (fluorine) substitution. Because synthetic mica does not contain OH - , so that it has the...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/12C09C3/06C09C3/04C08K9/06C08K9/02C08K9/00C08K3/34C09D7/12
Inventor 皮丕辉刘超文秀芳徐守萍程江
Owner 梅州市三宝光晶云母科技有限公司
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