Hyperbranched polymer modified chitosan fiber as well as preparation method and application thereof

A technology of hyperbranched polymer and chitosan fiber, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of limited specific surface area, limited active groups, and limited cadmium ions. And other issues

Inactive Publication Date: 2021-06-08
陈益
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in most studies, chitosan is mainly prepared into microspherical particles to adsorb heavy metal cadmium ions. Due to the limited specific surface area and limited active groups of the microspherical chitosan adsorbent, the amount of adsorption can be limited. Cadmium ions are also very limited

Method used

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  • Hyperbranched polymer modified chitosan fiber as well as preparation method and application thereof
  • Hyperbranched polymer modified chitosan fiber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of hyperbranched polymer modified chitosan fiber, comprises the steps:

[0028] S1. 10kg of chitosan fibers and 80kg of 0.8mol / L sodium hydroxide solution were stirred at a temperature of 50° C. for 10 minutes, filtered, washed with deionized water, and dried to obtain pretreated chitosan fibers;

[0029] S2. Add pretreated chitosan fiber and 10kg microcrystalline cellulose to 50kg sodium hydroxide solution with a concentration of 1.5mol / L, stir at a temperature of 50°C for 30min, cool down to room temperature, add 1kg epichlorohydrin, 0.2kg benzyl Triethylammonium chloride, stirred at room temperature for 1h, filtered, washed with deionized water, dried, added to 100kg of potassium periodate solution with a concentration of 1g / L, stirred in the dark for 2h, filtered, washed with deionized water, dried , to obtain oxidized chitosan fibers;

[0030] S3. Add 2kg of cyclodextrin to 80kg of amino-terminated hyperbranched polymer solution with a...

Embodiment 2

[0032] A kind of preparation method of hyperbranched polymer modified chitosan fiber, comprises the steps:

[0033] S1, with 20kg chitosan fiber, 40kg concentration is 1.2mol / L sodium hydroxide solution, stir 30min at temperature 40 ℃, filter, adopt deionized water to wash, dry, obtain pretreated chitosan fiber;

[0034] S2. Add pretreated chitosan fiber and 6kg microcrystalline cellulose to 100kg sodium hydroxide solution with a concentration of 0.8mol / L, stir at a temperature of 60°C for 10min, cool down to room temperature, add 2kg epichlorohydrin, 0.1kg ten Dialkyltrimethylammonium chloride, stirred at room temperature for 3h, filtered, washed with deionized water, dried and added to 50kg potassium periodate solution with a concentration of 2g / L, stirred for 1h in the dark, filtered, washed with deionized water , dry to obtain oxidized chitosan fiber;

[0035] S3. Add 8 kg of cyclodextrin to 50 kg of amino-terminated hyperbranched polymer solution with a concentration of ...

Embodiment 3

[0037] A kind of preparation method of hyperbranched polymer modified chitosan fiber, comprises the steps:

[0038] S1, with 13kg chitosan fiber, 70kg concentration is 0.9mol / L sodium hydroxide solution, stir 15min at temperature 48 ℃, filter, adopt deionized water to wash, dry, obtain pretreated chitosan fiber;

[0039] S2. Add pretreated chitosan fiber and 79kg microcrystalline cellulose to 60kg sodium hydroxide solution with a concentration of 1.4mol / L, stir at a temperature of 53°C for 25min, cool to room temperature, add 1.3kg epichlorohydrin, 0.17kg Tetradecyltrimethylammonium chloride, stirred at room temperature for 1.5h, filtered, washed with deionized water, dried and added to 80kg of sodium periodate solution with a concentration of 1.3g / L, stirred in the dark for 1.8h, filtered, and Washing with deionized water and drying to obtain oxidized chitosan fibers;

[0040] S3. Add 4kg of cyclodextrin to 70kg of amino-terminated hyperbranched polymer solution with a conce...

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Abstract

The invention discloses a preparation method of a hyperbranched polymer modified chitosan fiber. The method comprises: stirring chitosan fiber and a sodium hydroxide solution, filtering, washing with deionized water, and drying to obtain pretreated chitosan fiber; adding the pretreated chitosan fiber and microcrystalline cellulose into a sodium hydroxide solution, stirring at the temperature of 50-60 DEG C, cooling to room temperature, adding epoxy chloropropane and a phase transfer catalyst, stirring at room temperature for 1-3 hours, filtering, washing with deionized water, drying, adding the above into an oxidant solution, stirring at a dark place for 1-2 hours, filtering, washing with deionized water, and drying to obtain oxidized chitosan fiber; and adding cyclodextrin into the amino-terminated hyperbranched polymer solution, adjusting the pH value of the system to 7.2-7.6, stirring for 1-2 hours at the temperature of 40-60 DEG C, adding the oxidized chitosan fiber, placing the above in an ultraviolet lamp for ultraviolet irradiation for 1-2 hours, washing with deionized water, and drying to obtain the hyperbranched polymer modified chitosan fiber.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a hyperbranched polymer modified chitosan fiber and a preparation method and application thereof. Background technique [0002] Since the discovery of cadmium in the early 20th century, the output of cadmium has increased year by year. Cadmium is widely used in electroplating industry, chemical industry, electronics industry and nuclear industry. Cadmium is a by-product of zinc smelting industry. It is more easily absorbed by crops than other heavy metals. A considerable amount of cadmium is discharged into the environment through waste gas, waste water, and waste residue, causing pollution. For cadmium pollution, the commonly used treatment methods mainly include chemical precipitation, electrolysis, and adsorption. [0003] Adsorption method is currently the most popular direction in the research of cadmium-containing wastewater treatment. The adsorbents used can be di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/24B01J20/28023C02F1/286C02F2101/20
Inventor 陈益
Owner 陈益
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