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A kind of liquid crystal polymer organogel and preparation method thereof

A technology of liquid crystal polymers and organogels, applied in the field of supramolecular materials, can solve the problems of poor mechanical strength of organogels, and achieve the effects of controllable structure, simple preparation method, and mild reaction conditions

Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a liquid crystal polymer organogel and its preparation method, which improves the structure, composition and corresponding preparation method of the key gel factor liquid crystal polymer, Compared with the prior art, it can effectively solve the problem of poor mechanical strength of liquid crystal polymer organogels, and further expand the application range of main chain liquid crystal polymers in the field of organogels

Method used

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  • A kind of liquid crystal polymer organogel and preparation method thereof
  • A kind of liquid crystal polymer organogel and preparation method thereof
  • A kind of liquid crystal polymer organogel and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a method for preparing the liquid crystal polymer organogel, comprising the steps of:

[0044] (1) Synthetic gel factor; the gel factor is a main chain type liquid crystal polymer gel factor, and the main chain type liquid crystal polymer is a polymer formed by polymerization of one or more main chain type liquid crystal polymer units ; Any one of the main chain type liquid crystal polymer units includes C 4 ~C 14 Alkoxy chains, rigid groups and linking groups;

[0045] (2) Mix the gel factor obtained in step (1) with an organic solvent, and then raise the temperature to completely dissolve the gel factor, for example, to 50-100° C. to obtain an organic solution of the main chain type liquid crystal polymer;

[0046] (3) Lower the temperature of the main chain type liquid crystal polymer organic solution prepared in step (2) to obtain a polymer organogel, for example, the polymer organogel can be obtained by lowering the temperature...

Embodiment 1

[0058] The polymer organogel in this embodiment includes 8wt% liquid crystal polymer gel factor and 92wt% dioxane; wherein, the structure of the liquid crystal polymer gel factor is:

[0059]

[0060] The preparation method of this polymer organogel is as follows:

[0061] (1) Add 65.40 grams (470 mmol) K 2 CO 3 (Na 2 CO 3 ) and 10.81 grams (47mmol) Stir for half an hour. Then add 23.70 g (141 mmol) and 0.30 g (0.3 wt%) potassium iodide (sodium iodide can also be used), heated to 120 ° C, and reacted for 50 hours. After the reaction was stopped, it was cooled to room temperature, filtered, and rotary evaporated. Extracted three times with water and dichloromethane, separated and subjected to column chromatography. The selection and ratio of column chromatography solvents are dichloromethane:n-hexane=1:3. After spin-drying the solvent, put it in a vacuum oven for 24 hours. Recrystallized in chloroform and filtered to obtain

[0062] Adjust the temperature of t...

Embodiment 2

[0067] The polymer organogel in this embodiment includes 8wt% liquid crystal polymer gel factor and 92wt% DMF; wherein, the structure of the liquid crystal polymer gel factor is:

[0068]

[0069] figure 1 It is the wide-angle X-ray diffraction pattern of the gel factor obtained in this embodiment. The preparation method of this polymer organogel is as follows:

[0070] (1) Add 65.40 grams (470 mmol) K 2 CO 3 and 8.74 g (47 mmol) Stir for half an hour. Then add 29.8 grams (141mmol) And 0.31 grams (0.3wt%) potassium iodide, heated to 100 ℃, reacted for 24 hours. After the reaction was stopped, it was cooled to room temperature, filtered, and rotary evaporated. Extracted three times with water and dichloromethane, separated and subjected to column chromatography. The selection and ratio of column chromatography solvents are dichloromethane:n-hexane=1:5. After spin-drying the solvent, put it in a vacuum oven for 24 hours. Recrystallized in chloroform and filtered t...

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Abstract

The invention belongs to the technical field of supramolecular materials, and more particularly relates to a liquid crystal polymer organogel and a preparation method thereof. The organogel comprisesa main chain type liquid crystal polymer gelator and an organic solvent, and the main chain type liquid crystal polymer is a polymer formed by polymerizing one or more main chain type liquid crystal polymerization units, wherein any one of the main chain type liquid crystal polymerization units comprises a C4-C14 alkoxy chain, a rigid group and a linking group. The supramolecular polymer organogelprovided by the invention can effectively solve the problem of poor mechanical strength of a current liquid crystal polymer organogel, the preparation method is simple and has low costs, and an application range of a main chain type liquid crystal polymer in organogels is further expanded.

Description

technical field [0001] The invention belongs to the technical field of supramolecular materials, and more specifically relates to a liquid crystal polymer organogel and a preparation method thereof. Background technique [0002] Organogels are gels with organic solvents as the dispersion medium. Organogels have strong adaptability to solvents and have many applications in textiles, cosmetics, and medical care. Common stimuli-responsive gels can only provide simple uniform deformation due to their isotropic structure, which limits their further applications. Oriented gels undergo non-uniform deformation under external stimuli and can be used in artificial intelligence soft material drives. [0003] Liquid crystal polymers have attracted extensive attention due to their structural anisotropy. The introduction of liquid crystal polymers into the gel is expected to prepare aligned gels in a simple way. Currently, very little research has been done on liquid crystal polymer ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/09C08G63/685C08G63/78C08L67/02
CPCC08G63/6856C08G63/78C08J3/09C08J2367/02
Inventor 廖永贵王晶周兴平解孝林
Owner HUAZHONG UNIV OF SCI & TECH
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