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Preparation method of attapulgite inorganic liquid crystal material

A technology of attapulgite and inorganic liquid crystals, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problem of inability to form liquid crystals, and achieve the effects of easy control of the process, cheap and easy-to-obtain raw materials, and simple and safe production processes

Inactive Publication Date: 2017-12-29
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, attapulgite clay usually exists in the form of dense aggregates, and it is difficult to form a stable dispersion system in water or in organic media, so it cannot form a good liquid crystal phase.

Method used

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  • Preparation method of attapulgite inorganic liquid crystal material
  • Preparation method of attapulgite inorganic liquid crystal material
  • Preparation method of attapulgite inorganic liquid crystal material

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Grind the attapulgite to 200 mesh, soak it with water and squeeze the roller three times, add deionized water to make a 5wt% slurry, and remove the non-clay impurities in the lower layer after sedimentation; disperse the unevenness by beating at 10000 rpm The rod stone was centrifuged for 20 minutes at a low speed of 1000 rpm for 20 minutes, and the upper layer suspension was taken; the lower layer was re-added with deionized water to prepare a 5wt% slurry, and the above-mentioned beating-centrifugation treatment was repeated 4 times, and the resulting upper layer suspension was combined; The dispersant sodium hexametaphosphate of 3wt% of the attapulgite mass was added to the combined suspension, and after being fully stirred, it was left to stand for 3 hours, and the upper suspension was taken. The upper suspension was D 90 It is a highly dispersed slurry of 0.9 μm, and the supernatant is discarded by centrifugation to obtain a paste; the paste is washed 4 ti...

Embodiment 2

[0018] Example 2: Grind the attapulgite to 200 mesh, soak it with water and squeeze the roller 4 times, add deionized water to prepare a 5wt% slurry, and remove the non-clay impurities in the lower layer after sedimentation; disperse the unevenness by beating at 10000 rpm The rod stone was centrifuged for 25 minutes at a low speed of 1000 rpm for 20 minutes, and the upper layer suspension was taken; the lower layer was re-added with deionized water to prepare a 5wt% slurry, and the above-mentioned beating-centrifugation process was repeated 4 times, and the resulting upper layer suspension was combined; The 2.0wt% dispersant sodium hexametaphosphate of the attapulgite mass was added to the combined suspension, and after being fully stirred, it was allowed to stand for 3 hours. After settling, the upper suspension was taken, and the upper suspension was D 90 It is a highly dispersed slurry of 0.9 μm, and the supernatant is discarded by centrifugation to obtain a paste; the paste...

Embodiment 3

[0019] Example 3: Attapulgite was crushed to 200 mesh, soaked with water and squeezed 5 times on the roll, added deionized water to prepare a slurry of about 5wt%, and settled to remove the non-clay impurities in the lower layer; beat and disperse at 10000 rpm Attapulgite for 30 minutes, continue to centrifuge at a low speed of 1000rpm for 20 minutes, and take the upper layer suspension; add deionized water to the lower layer to make a 5wt% slurry, repeat the above beating-centrifugation treatment 3 times, and combine the obtained upper layer suspension; Add the 1.0wt% dispersant sodium hexametaphosphate of the attapulgite mass to the above combined suspension, fully stir and let it stand for 3 hours, and take the upper suspension after settling, the upper suspension is D 90 It is a highly dispersed slurry of 0.9 μm, and the supernatant is discarded by centrifugation to obtain an attapulgite paste; the paste is washed 3 times with isopropanol, and isopropanol is added to prepar...

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Abstract

The invention discloses a preparation method for an attapulgite inorganic liquid crystal material. The preparation method comprises the following concrete steps: crushing attapulgite, impregnating crushed attapulgite in water, carrying out compressing with a double-roller, adding deionized water so as to prepare a slurry, carrying out settling, and removing non-clay impurities at a lower layer; carrying out high-speed pulping for dispersion, continuing low-speed centrifuging, and taking a suspension at an upper layer; adding deionized water into the lower layer again so as to prepare a slurry, carrying out pulping-centrifuging treatment again, and combining the upper suspensions; adding sodium hexametaphosphate into the combined suspension, carrying out stirring, standing and settling, and taking the suspension at the upper layer so as to obtain a slurry with narrow particle size distribution and high dispersion, carrying out centrifuging, and removing a supernatant liquid so as to obtain an attapulgite paste; washing the attapulgite paste with isopropanol, adding isopropanol again so as to prepare a slurry, then adding a silane coupling agent, and carrying out high-speed stirring and heat-preserving; and carrying out centrifuging, removing a supernatant liquid, carrying out dispersing into cyclohexane, adding a stabilizer, and carrying out stirring and standing so as to obtain the attapulgite liquid crystal material. By using the method provided by the invention, an attapulgite dispersion system with high dispersion and uniform distribution is obtained, and the system has anisotropy and responsiveness of a liquid crystal material.

Description

technical field [0001] The invention relates to a preparation method of an attapulgite inorganic liquid crystal material, and belongs to the technical field of clay deep processing. Background technique [0002] Liquid crystal material is an important optoelectronic functional material in today's society, which is widely used in different fields such as chemical industry, optical communication field and medicine. The vast majority of liquid crystal materials synthesized or discovered by scientists today are organic liquid crystals. Inorganic liquid crystal materials have relatively few substances that meet the conditions for preparing inorganic liquid crystal materials, and the conditions for the preparation of inorganic materials are limited (only lyotropic liquid crystal materials can be prepared). Therefore, inorganic liquid crystal materials are much less than organic liquid crystals. However, inorganic materials have incomparable advantages over organic materials: firs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/40C09K19/52
CPCC09K19/406C09K19/52C09K2019/525C09K2019/528
Inventor 金慧然陈静金叶玲王志辉丁师杰
Owner HUAIYIN INSTITUTE OF TECHNOLOGY