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Preparation method of corn stalk regenerated cellulose and nano activated carbon composite gel film

A nano-activated carbon and regenerated cellulose technology, which is applied in cellulose raw material pulping, nanotechnology, nanotechnology, etc., can solve the problems of poor burst resistance and tear resistance, limitations, naturalness and degradability of gel products, etc. problem, to achieve good adsorption performance, environmental friendliness and low cost

Active Publication Date: 2016-11-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor physical strength of the gel film formed by natural or regenerated cellulose, such as stretchability, burst resistance and tear resistance, it is greatly limited in practical applications.
In order to overcome such defects, the preparation of cellulose gel membranes usually requires chemical crosslinking, which increases the product cost and the complexity of the operation process. On the other hand, the reagents used for cellulose crosslinking today [8] Basically derived from petrochemical products, questioning the naturalness and degradability of gel products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0036] Example 1: The preparation method of corn whole stalk regenerated cellulose-nano activated carbon composite gel film, the specific operation is as follows:

[0037] (1) Preparation process of corn stalks

[0038] The straw is air-dried, and the water content of the air-dried raw material is 5%, and then the air-dried material is subjected to leaf and stalk peeling treatment, and the two parts of the raw material are crushed separately, sieved with a standard sieve, and taken through a 40-mesh sieve, but not a 60-mesh sieve The part is two kinds of qualified raw materials.

[0039] (2) Extraction process of cellulose

[0040] Cellulose separation condition is: potassium hydroxide consumption 20.0%, hydrogen peroxide consumption 10.0%, do not add magnesium sulfate, anthraquinone consumption 0.05%, oxygen pressure 0.1MPa, material treatment concentration 8.0%, reaction time 5.0h, treatment temperature 160 ℃.

[0041] The specific steps are: mix 10.0g of absolute dry cor...

Embodiment 2

[0053] Example 2: The preparation method of the regenerated cellulose-nano activated carbon composite gel film based on the whole corn stalk, the specific operation is as follows:

[0054] (1) Preparation process of corn stalks

[0055] The straw is air-dried, and the water content of the air-dried raw material is 15%, and then the air-dried product is subjected to leaf and stalk peeling treatment, and the two parts of the raw material are crushed separately, sieved with a standard sieve, and taken through a 100-mesh sieve, but not a 200-mesh sieve The part is two kinds of qualified raw materials.

[0056] (2) Extraction process of cellulose

[0057] Cellulose separation condition is: potassium hydroxide consumption 30.0%, hydrogen peroxide consumption 20.0%, magnesium sulfate consumption 0.5%, anthraquinone consumption 0.25%, oxygen pressure 0.6MPa, material treatment concentration 12.0%, reaction time 10.0h, treatment temperature 130°C.

[0058]The specific steps are: mix...

Embodiment 3

[0070] Embodiment 3: The preparation method of the regenerated cellulose-nano activated carbon composite gel film based on the whole corn stalk, the specific operation is as follows:

[0071] (1) Preparation process of corn stalks

[0072] The straw is air-dried, and the water content of the air-dried raw material is 25%, and then the air-dried material is stripped of leaves and stalks, and the two parts of the raw material are crushed separately, sieved with a standard sieve, and taken through a 200-mesh sieve, but not a 400-mesh sieve The part is two kinds of qualified raw materials.

[0073] (2) Extraction process of cellulose

[0074] Cellulose separation condition is: potassium hydroxide consumption 50.0%, hydrogen peroxide consumption 35.0%, magnesium sulfate consumption 1.0%, anthraquinone consumption 0.5%, oxygen pressure 0.8MPa, material treatment concentration 15.0%, reaction time 15.0h, treatment temperature 100°C.

[0075] The specific steps are: mix 10.0g of ab...

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PUM

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Abstract

The present invention discloses a preparation method of corn stalk regenerated cellulose and nano activated carbon composite gel film, including: stripping air-dried corn stalks, cutting, grinding, screening to obtain shanks and leaves, and subjecting the shanks to oxygen, hydrogen peroxide, potassium hydroxide or anthraquinone treatment to obtain corn stalk cellulose; dissolving the cellulose by means of low-temperature lithium hydroxide (sodium hydroxide) or thiourea (urea) method; converting corn leaves into nano activated carbon by means of thermal carbonization, ball milling, ethanol activating and dispersing as well as centrifugal classifying; mixing the activated carbon with the stalk cellulose dissolved solution, shaping in a mold, neutralizing and shaping by sulfuric acid bath, washing, and drying to obtain the core stalk composite gel film. The gel film produced by the method is semitransparent and brown sheeting that has great ability to adsorb heavy metal ions such as Zn2+, Fe3+, Cd3+ and Cu2+.

Description

technical field [0001] The invention relates to a process technology for preparing a natural polymer gel film with high absorption of heavy metal ions by utilizing agricultural solid waste—corn whole stalks, and belongs to the technical field of natural polymer modified materials. Background technique [0002] Heavy metal pollution in the water environment means that the heavy metal pollutants discharged into the water body exceed the self-purification capacity of the water body, which changes the composition and properties of the water, thereby deteriorating the growth conditions of organisms in the water environment and causing serious damage to human life and health. bad influence behavior [1] . In recent years, no matter at home or abroad, with the rapid development of industry, agriculture and economy, the pollution of heavy metals in the water environment has become increasingly serious. The discharge of wastewater containing heavy metal ions is a major source of env...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08K3/04C08J5/18C02F1/28C01B31/08B82Y30/00D21C3/00D21C3/02B27J7/00
CPCD21C3/00D21C3/02D21C3/026B82Y30/00C02F1/288C08J5/18C08K3/04B27J7/00C08J2301/02C08L2203/16C08K2201/011C08L1/02
Inventor 高欣张恒陈克利
Owner KUNMING UNIV OF SCI & TECH
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