A kind of kapok nanocellulose aerogel and its preparation method and application

A technology of nanocellulose and kapok fiber, applied in aerogel preparation, separation method, chemical instrument and method, etc., can solve environmental pollution caused by cellulose aerogel reusability, complex cellulose extraction method, oily liquid The recovery steps are complex and other problems, to achieve good lipophilicity and hydrophobicity, good hydrophobic effect, and reduce the preparation cost.

Active Publication Date: 2022-07-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the extraction method of cellulose is complicated, the price of raw materials is still relatively high, it is easy to cause pollution to the environment, and the reusability of cellulose airgel is poor, the oil recovery steps are complicated, and it is easy to cause secondary pollution after adsorption

Method used

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  • A kind of kapok nanocellulose aerogel and its preparation method and application

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Embodiment 1

[0027] This embodiment provides a method for preparing a kapok nanocellulose aerogel adsorption material. The kapok nanocellulose obtained after microfibrillation and homogenization is configured into a uniform suspension, and the pH of the solution is adjusted between 3 and 3. Between 4 and 4, a silane coupling agent was added for hydrophobic modification, and kapok nanocellulose aerogel was prepared by freeze-drying after freezing. The specific operation steps are as follows:

[0028] Step 1. Extraction of kapok nanocellulose:

[0029] Put the kapok fiber into a 10wt% NaOH solution, and treat it at 80 °C for 1 h to remove impurities such as wax on the surface of the kapok fiber, and then rinse the lye on the fiber with deionized water; The kapok fiber pulp is obtained by beating treatment; and then the kapok pulp is put into a high-pressure homogenizer for homogenization treatment to obtain kapok nanocellulose. Take a cellulose solution with a kapok nanocellulose content o...

Embodiment 2

[0036] This embodiment provides a method for preparing a kapok nanocellulose aerogel adsorption material. The kapok nanocellulose obtained after microfibrillation and homogenization is configured into a uniform suspension, and the pH of the solution is adjusted between 3 and 3. Between 4 and 4, a silane coupling agent was added for hydrophobic modification, and kapok nanocellulose aerogel was prepared by freeze-drying after freezing. The specific operation steps are as follows:

[0037] Step 1. Extraction of kapok nanocellulose:

[0038] Put the kapok fiber into a 10wt% NaOH solution, and treat it at 80°C for 1 h to remove the wax on the surface of the kapok fiber, and then rinse the lye on the fiber with deionized water; then use a beater to beat the kapok fiber. The kapok fiber pulp is obtained; and then the kapok pulp is put into a high-pressure homogenizer for homogenization treatment to obtain kapok nanocellulose. Take a cellulose solution with a kapok nanocellulose con...

Embodiment 3

[0045]This embodiment provides a method for preparing a kapok nanocellulose aerogel adsorption material. The kapok nanocellulose obtained after microfibrillation and homogenization is configured into a uniform suspension, and the pH of the solution is adjusted between 3 and 3. Between 4 and 4, a silane coupling agent was added for hydrophobic modification, and kapok nanocellulose aerogel was prepared by freeze-drying after freezing. The specific operation steps are as follows:

[0046] Step 1. Extraction of kapok nanocellulose:

[0047] Put the kapok fiber into a 10wt% NaOH solution, and treat it at 80°C for 1 h to remove the wax on the surface of the kapok fiber, and then rinse the lye on the fiber with deionized water; then use a beating machine to beat the kapok fiber. kapok fiber pulp is obtained; the kapok pulp is then put into a high-pressure homogenizer for homogenization to obtain kapok nanocellulose. Take a cellulose solution with a kapok nanocellulose content of 0....

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Abstract

The invention discloses a kapok nanocellulose aerogel and a preparation method and application thereof. The kapok nanocellulose aerogel of the present invention uses nanocellulose extracted from kapok fibers as a raw material, and is then hydrophobically modified with a silane coupling agent to prepare an aerogel. The method extracts nanocellulose from kapok fibers with abundant resources and low price to prepare oil and organic solvent adsorption materials, which can significantly reduce the preparation cost and simplify the production process. The kapok nanocellulose aerogel prepared by the method has low cost. It has excellent properties such as low density, high porosity and degradability, and can efficiently adsorb various organic solvents and oil pollutants in sewage, with high adsorption capacity and fast speed, and can maintain the adsorbed oil for a long time without occurrence of Secondary leakage, good mechanical properties and can be reused many times, easy to degrade after use.

Description

technical field [0001] The invention relates to a kapok nanocellulose aerogel, a preparation method and application thereof, and belongs to the technical field of aerogel materials. Background technique [0002] In recent years, petroleum pollutants have become one of the main pollutants in water, causing very serious damage to oceans, rivers and other waters and the surrounding ecological environment. Adsorption has become the main method to deal with oil pollution problems, but the commonly used adsorption materials still have problems such as high cost, small adsorption capacity, non-recyclable, difficult to biodegrade, and easy to cause secondary pollution. Therefore, the development of adsorbent materials with low price, simple preparation process, high adsorption capacity, and multiple cycles of use has gradually become a research hotspot. [0003] As a natural adsorption material, kapok fiber has a unique large hollow structure and excellent adsorption performance. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28B01J13/00B01J20/24B01J20/28B01J20/30B01D17/022B01D39/16
CPCC08J9/28B01J13/0091B01J20/24B01J20/28047B01D17/0202B01D39/1615C08J2301/02C08J2201/0484C08J2205/026Y02A20/204
Inventor 沈华张慧敏王霁龙徐广标王府梅
Owner DONGHUA UNIV
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