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Preparation method of ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption

A technology of cellulose airgel and nanofibrillation, which is applied in the direction of coating, etc., can solve the problems of low oil absorption rate and strong hydrophilicity, and achieve the effects of high oil absorption rate, high safety and wide source of raw materials

Inactive Publication Date: 2014-04-30
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
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Problems solved by technology

[0005] The present invention aims to solve the problem that the existing cellulose airgel has low oil absorption rate (less than 100 times) and strong hydrophilicity, so it is not suitable for oil-water separation materials, and provides an ultra-light, hydrophobic, Preparation method of nanofibrillated cellulose airgel with high oil absorption rate

Method used

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  • Preparation method of ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption
  • Preparation method of ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption
  • Preparation method of ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption

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specific Embodiment approach 1

[0022] Embodiment 1: The preparation method of a nano-fibrillated cellulose airgel described in this embodiment is ultra-light, hydrophobic, and high oil absorption, specifically according to the following steps:

[0023] 1. Preparation of cellulose aqueous solution: weigh 1 to 100 parts of cellulose and 100 to 10,000 parts of water in parts by mass; add 1 to 100 parts of cellulose to 100 to 10,000 parts of water, and stir Uniformly, obtain cellulose aqueous solution;

[0024] 2. Preparation of nanofibrillated cellulose aqueous dispersion: ①. Put the cellulose aqueous solution into an ultrasonic cell crusher with a temperature of -100°C to 100°C and an output power of 10W to 1000W; ②. ℃~100℃ and an ultrasonic cell disruptor with an output power of 10W~1000W, after ultrasonic treatment for 0.01s~60s, suspend the ultrasonic treatment for 0.01s~60s; The ultrasonic treatment time is the total working time, and step 2② is carried out in a cycle until the total working time is 1 mi...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment differs from Embodiment 1 in that the cellulose described in step 1 is obtained by chemical purification using coconut shell, cotton, filter paper, bamboo fiber, pulp, wood or straw as raw materials. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the water described in step 1 is distilled water, deionized water or ultrapure water. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of an ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption, and relates to a preparation method of cellulose aerogel. The method disclosed by the invention aims to solve the problem that existing cellulose aerogel which is lower in oil absorption multiplying power and strong in hydrophilicity is not suitable for oil-water separating materials. The method comprises the following steps: I, preparing cellulose aqueous liquor; II, preparing a nano fibrillated cellulose aqueous dispersion liquid; III, preparing a strongly gelatinous nano fibrillated cellulose aqueous dispersion liquid; IV, freezing and drying; and V, carrying out hydrophobic modification to obtain the ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption. The preparation method of the ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption is simple in preparation process, wide in source of raw materials, low in cost and environment-friendly and green. The invention relates to the preparation method of the ultralight and hydrophobic nano fibrillated cellulose aerogel with high oil absorption.

Description

technical field [0001] The invention relates to a preparation method of cellulose airgel. Background technique [0002] Oil spills have brought heavy disasters to our ecological environment. Oil flows into the sea, and some toxic substances contained in it flow into the biological chain, and its poisonous effect is from lower algae to higher animals and plants. Moreover, oil spills also cause immeasurable harm to groundwater, marine organisms, and seawater environments. At present, the method favored by people to deal with oil spills is to use some special, cheap, highly absorbent, hydrophobic and lipophilic adsorbent material to absorb oil from the oil-water mixture and obtain relatively pure oil by simple mechanical extrusion. Oil, to achieve oil-water separation. Cellulose aerogels, as the new third-generation aerogels, have both the high porosity, high specific surface area, low sound velocity, low optical refractive index, and low dielectric strength of silicon aerog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C08J9/28C08J3/075C08L1/02
Inventor 李坚万才超孙庆丰卢芸高丽坤甘文涛
Owner NORTHEAST FORESTRY UNIVERSITY
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