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Preparation method and use of loofah sponge surface lead ion imprinted absorbing material

The technology of imprinting material and loofah is applied in the field of preparation and application of lead ion imprinted adsorption material on the surface of loofah, which can solve the problems of destroying the imprinting point, poor controllability, small adsorption capacity, etc. The effect of strong adsorption capacity

Inactive Publication Date: 2011-03-30
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires a simple device and strong universality, but there are usually the following problems: (1) The controllability is poor during the grinding process, and some irregular particles are inevitably generated, and some imprinted spots are destroyed at the same time
[0007] The adsorption capacity of the adsorbent for metal ions in the water system obtained by using loofah or loofah chemical modification is small, and its selectivity is poor

Method used

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  • Preparation method and use of loofah sponge surface lead ion imprinted absorbing material
  • Preparation method and use of loofah sponge surface lead ion imprinted absorbing material

Examples

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Effect test

Embodiment 1

[0029] (1) Loofah pretreatment: loofah is derived from loofah fruit, which is obtained by peeling and removing the core, cutting loofah into small pieces, washing with water, drying in vacuum, crushing, and sieving with an 80-mesh sieve;

[0030] (2) the loofah that pulverizes is by 50% of gross mass, is that 5% NaOH solution and 20% ethanol solution are mixed and submerged azeotrope 0.5h with concentration, constantly adds NaOH solution and ethanol mixed solution during azeotropy, to keep The volume of the solution is constant, after cooling, it is washed with deionized water until the pH is 7, and after suction filtration, it is dried at 60° C. to obtain alkalized loofah.

[0031](3) Acylated loofah: In a stoppered Erlenmeyer flask, add 2 g of alkalized loofah and 40 mL of chloroform, stir for 10 min under the protection of argon, and add 2 mL of acryloyl chloride dropwise with a constant pressure funnel. Stir for 10 min after dropping, and then add 3.5 mL of triethylamine d...

Embodiment 2

[0036] (1) Loofah pretreatment: loofah is derived from loofah fruit, which is obtained by peeling and removing the core, cutting loofah into small pieces, washing with water, drying in vacuum, crushing, and sieving with an 80-mesh sieve;

[0037] (2) the loofah that pulverizes is by 50% of gross mass, is that 5% NaOH solution and 20% ethanol solution are mixed and submerged azeotrope 0.5h with concentration, constantly adds NaOH solution and ethanol mixed solution during azeotropy, to keep The volume of the solution is constant, after cooling, it is washed with deionized water until the pH is 7, and after suction filtration, it is dried at 60° C. to obtain alkalized loofah.

[0038] (3) Acylated loofah: In a stoppered Erlenmeyer flask, add 2 g of alkalized loofah and 40 mL of chloroform, stir for 10 min under the protection of argon, and add 2 mL of acryloyl chloride dropwise with a constant pressure funnel. Stir for 10 min after dropping, and then add 3.5 mL of triethylamine ...

Embodiment 3

[0043] (1) Loofah pretreatment: loofah is derived from loofah fruit, which is obtained by peeling and removing the core, cutting loofah into small pieces, washing with water, drying in vacuum, crushing, and sieving with an 80-mesh sieve;

[0044] (2) the loofah that pulverizes is by 50% of gross mass, is that 5% NaOH solution and 20% ethanol solution are mixed and submerged azeotrope 0.5h with concentration, constantly adds NaOH solution and ethanol mixed solution during azeotropy, to keep The volume of the solution is constant, after cooling, it is washed with deionized water until the pH is 7, and after suction filtration, it is dried at 60° C. to obtain alkalized loofah.

[0045] (3) Acylated loofah: In a stoppered Erlenmeyer flask, add 2 g of alkalized loofah and 40 mL of chloroform, stir for 10 min under the protection of argon, and add 2 mL of acryloyl chloride dropwise with a constant pressure funnel. Stir for 10 min after dropping, and then add 3.5 mL of triethylamine ...

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Abstract

The invention discloses a preparation method of a loofah sponge surface lead ion imprinted absorbing material and the use of the loofah sponge surface lead ion imprinted absorbing material in metal ion absorption and belongs to natural high polymer material modification. In the method, the loofah sponge natural high polymer material is used as a support, and the surface of the material is modified with a lead ion imprinted polymer. The main technical characteristics of the method include: adding acylated loofah sponge, lead-dithizone complex, 4-vinylpyridine, ethylene dimethacrylate and azodiisobutyronitrile into a chloroform medium, removing oxygen by argon in a certain proportion; introducing argon to expel oxygen; reacting in a water bath at a constant temperature of 50 to 70 DEG C, filtering and washing; and performing Soxhlet extraction by using 0.10mol / L solution of HNO3 for 12 hours, removing template lead ions, washing, drying and obtaining the material. The material has specific lead ion identification capacity, high selectivity, high absorption speed and high desorption capacity, is widely available and biodegradable, can be prepared by a simple process and has regeneration capacity and the advantages of environmental friendliness and the like.

Description

technical field [0001] The invention relates to a preparation method and application technology of an adsorption material for metal ions in a water system, in particular to a preparation method and application technology of a lead ion imprinted adsorption material on the surface of loofah, which belongs to the modification of natural polymer materials. Background technique [0002] Highly selective materials with molecular recognition function have always attracted people's attention. Molecular imprinting technology is currently one of the main methods for preparing highly selective materials. Molecularly imprinted polymers prepared according to this technology have a predetermined and specific recognition performance due to the "memory" function of the three-dimensional structure of imprinted molecules, and have very broad application prospects in the fields of separation science and biomimetic science. With the rapid development of science and technology, people have high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 李慧芝许崇娟庄海燕魏琴
Owner UNIV OF JINAN
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