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Quaternization cellulose bead as well as preparation method and application thereof

A technology of cellulose beads and quaternization, applied in the field of preparation and quaternization of cellulose beads, can solve problems such as modification of cellulose beads, and achieve the effects of good repeatability, high reaction efficiency and low cost

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

AI Technical Summary

Problems solved by technology

Luo Xiaogang et al. (Journal of HazardousMaterials, 2009, 171, 340-347) successfully prepared millimeter-scale cellulose beads by extrusion drop solidification method; in addition, the application document of application number CN201410667306.2 also discloses a fiber The preparation method of plain beads, the specific plan is to pre-cool the alkali / urea aqueous solution or the alkali / thiourea aqueous solution to -12~-5°C, then add cellulose, stir and dissolve, defoam and remove impurities to obtain a cellulose solution; The prepared cellulose solution is sucked into the syringe, solidified in the solidification solution by injection extrusion dripping method, and finally washed repeatedly with distilled water to obtain cellulose beads; all of these schemes prepare cellulose beads. , but there is no report on the modification of cellulose beads

Method used

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  • Quaternization cellulose bead as well as preparation method and application thereof
  • Quaternization cellulose bead as well as preparation method and application thereof
  • Quaternization cellulose bead as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare quaternized cellulose beads, the specific steps are as follows: 1) Prepare quaternized cellulose solution: 200g NaOH / urea aqueous solution (the mass ratio of NaOH, urea and water is 7:12:81) is pre-cooled to -12°C Finally, 6 g of cellulose was dissolved, and 5.611 g of 2,3-epoxypropyltrimethylammonium chloride was added. After centrifugal defoaming and impurity removal, the mixture was placed at 25° C. for 24 hours for homogeneous reaction to obtain a quaternized cellulose solution.

[0039]2) Preparation of quaternized cellulose beads: the quaternized cellulose solution prepared in step 1) is squeezed through a 0.8mm needle syringe, and dripped to a mass fraction of 10% at a position 10 cm above the solidified liquid level solidified in an aqueous solution of sodium chloride, and washed with distilled water to remove impurities to obtain quaternized cellulose beads.

[0040] The water content of the quaternized cellulose beads prepared in this embodiment is 97%...

Embodiment 2

[0046] Prepare quaternized cellulose beads, the specific steps are as follows:

[0047] 1) Preparation of quaternized cellulose solution: Pre-cool 200g of NaOH / urea aqueous solution (the mass ratio of NaOH, urea and water is 7:12:81) to -5°C and dissolve 6g of cellulose, add 0.561g of 2,3 -Glycidyltrimethylammonium chloride, after centrifugal defoaming and impurity removal, place at 4°C for 1 hour for homogeneous reaction to obtain a quaternized cellulose solution.

[0048] 2) Preparation of quaternized cellulose beads: the quaternized cellulose solution obtained in step 1) is extruded through a 0.45mm needle syringe, and dripped into pure water for solidification at a height of 3 cm from the solidification liquid level. Impurities were removed by washing with distilled water to obtain quaternized cellulose beads.

[0049] After measurement, the particle diameter of the quaternized cellulose beads prepared in this example is 1 mm, the water content is 95%, and the skeleton de...

Embodiment 3

[0051] Prepare quaternized cellulose beads, the specific steps are as follows:

[0052] 1) Preparation of quaternized cellulose solution: pre-cool 200g NaOH / urea aqueous solution (the mass ratio of NaOH, urea and water is 7:12:81) to -8°C and dissolve 6g of cellulose, add 16.833g of 2,3-cyclo Oxypropyltrimethylammonium chloride was centrifuged to defoam and remove impurities, and placed at 45°C for 7 days for a homogeneous reaction to obtain a quaternized cellulose solution.

[0053] 2) Preparation of quaternized cellulose beads: the quaternized cellulose solution obtained in step 1) is squeezed through a 1.6mm needle syringe, and dripped to a mass fraction of 10% hydrochloric acid solution at a position 25 cm from the solidification liquid level solidified in the medium, washed with distilled water to remove impurities, and obtained quaternized cellulose beads.

[0054] It has been determined that the quaternized cellulose beads prepared in this example are 6 mm in size, hav...

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Abstract

The invention discloses a quaternization cellulose bead as well as a preparation method and application thereof. The diameter of the quaternization cellulose bead is 0.5-6mm; the water content of the quaternization cellulose bead is 90-99%; the framework density of the quaternization cellulose bead is 1.1-1.8g / cm<3>; the porosity of the quaternization cellulose bead is 90-99%. The quaternization cellulose bead is prepared by using a homogeneous phase modification method, and the application field of the quaternization cellulose bead is greatly widened by virtue of functional characteristics of quaternary ammonium groups, for example, as substances with negative electricity can be sucked through positive electricity of the quaternization cellulose bead, protein immobilization and the like can be achieved by virtue of affinity of the quaternization cellulose bead. The quaternization cellulose bead disclosed by the invention is good in adsorption property upon dyes and antibiotics with negative electricity, and can be used as a novel chemical material for fields such as biological carriers, chromatograph and adsorption.

Description

technical field [0001] The invention relates to a quaternized ammonium cellulose bead, a preparation method and an application, and belongs to the technical field of functional materials. Background technique [0002] Cellulose is the most abundant natural polymer in the world, accounting for more than 50% of the carbon content in the plant kingdom. Cotton has a cellulose content greater than 90%, making it the purest natural source of cellulose. Cellulose and its derivative products have been widely used in many fields such as textile, papermaking, chemical industry, food, biology and medicine. The further development and utilization of cellulose resources is of great significance to the development of new energy, the development of new materials and the improvement of the ecological environment. [0003] As an inert material polymer bead, cellulose beads have the advantages of low cost, hard texture, good spherical structure, high biocompatibility, strong modifiability, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L1/02C08K5/19
CPCC08J3/12C08J2301/02C08K5/19C08L1/02
Inventor 罗晓刚袁俊刘英格刘超朱星蓉
Owner WUHAN INSTITUTE OF TECHNOLOGY
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