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Preparing method and application of sugarcane-leaf hydrophobic modification nanocellulose

A nanocellulose, hydrophobic modification technology, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., to achieve the effect of broadening the scope of comprehensive utilization and reducing the amount of addition

Active Publication Date: 2019-04-16
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is less research on the further processing of sugarcane leaf cellulose into nanocellulose and its application in other fields.

Method used

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  • Preparing method and application of sugarcane-leaf hydrophobic modification nanocellulose
  • Preparing method and application of sugarcane-leaf hydrophobic modification nanocellulose
  • Preparing method and application of sugarcane-leaf hydrophobic modification nanocellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Chapter 1 Preparation and Properties of Sugarcane Leaf Cellulose

[0066] The sugarcane leaves of Yuetang No. 159 were used as raw materials in this experiment. It has been detected that the contents of three major components in the sugarcane leaves are: 40.26% cellulose, 23.06% hemicellulose and 17.16% lignin. The sugarcane leaves were pretreated by alkaline hydrogen peroxide method to remove lignin and hemicellulose in the sugarcane leaves. Taking the cellulose content of sugarcane leaves after treatment as the evaluation index, the optimal process conditions for preparing sugarcane leaf cellulose were found through single factor test and orthogonal test.

[0067] Pretreatment of sugarcane leaves

[0068] The sugarcane leaves taken from the field are washed with water several times to remove impurities such as soil on the surface, and then dried naturally. Carry out pulverization with pulverizer and cross 60 mesh sieves for subsequent use. Accurately weigh a certai...

Embodiment 2

[0207] A preparation method for hydrophobically modified nano-cellulose of sugarcane leaves, comprising the steps of:

[0208] (1) according to the ratio by weight of sugarcane leaf nanocellulose and stearic acid is 0.5:1 to take raw materials, then described sugarcane leaf nanocellulose and stearic acid are dropped into acetone and mixed to obtain dispersion system,

[0209] (2) Put the dispersion system under the condition of 20°C for modification treatment for 60min,

[0210] (3) Washing continuously with an organic solvent capable of dissolving stearic acid until all stearic acid not participating in the reaction is removed, and then drying to obtain the modified nanocellulose.

[0211] Preferably, in step (1), in the dispersion system, the concentration of stearic acid is 6mmoL.L -1 .

[0212] Preferably, in step (1), in the dispersion system, the concentration of sugarcane leaf nanocellulose is 1 mg.L -1 .

[0213] Preferably, the preparation method of the sugarcane ...

Embodiment 3

[0221] A preparation method for hydrophobically modified nano-cellulose of sugarcane leaves, comprising the steps of:

[0222] (1) according to the ratio by weight of sugarcane leaf nanocellulose and stearic acid is 2:1 to take raw materials, then described sugarcane leaf nanocellulose and stearic acid are dropped into benzene and mix to obtain dispersion system,

[0223] (2) Place the dispersion at 70°C for 100 minutes of modification treatment,

[0224] (3) Washing continuously with an organic solvent capable of dissolving stearic acid until all stearic acid not participating in the reaction is removed, and then drying to obtain the modified nanocellulose.

[0225] Preferably, in step (1), in the dispersion system, the concentration of stearic acid is 1mmoL.L -1 .

[0226] Preferably, in step (1), in the dispersion system, the concentration of sugarcane leaf nanocellulose is 2 mg.L -1 .

[0227] Preferably, the preparation method of the sugarcane leaf nanocellulose compr...

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Abstract

The invention discloses a preparing method of sugarcane-leaf hydrophobic modification nanocellulose. The preparing method includes the following steps that raw materials are weighed according to the weight ratio of sugarcane-leaf nanocellulose to stearic acid of (0.5-2):1, then the sugarcane-leaf nanocellulose and the stearic acid are put into an organic solvent capable of dissolving the stearic acid and mixed evenly, and a dispersion system is obtained; the dispersion system is put at the temperature of 20 DEG C to 70 DEG C, and is modified for 60 min to 100 min, filtering, washing and dryingare carried out, and then the modified nanocellulose is obtained. The invention also provides application when the sugarcane-leaf nanocellulose subjected to hydrophobic modification through the stearic acid serves as an antifoaming agent and an additive. Different hydrophobic degrees and different amounts of hydrophobic nanocellulose are added into an organic-silicon antifoaming agent, and the result shows that the antifoaming / foam inhibition performance of the organic-silicon antifoaming agent is continually increased along with increasing of the hydrophobic degrees and increasing of the additive amount; meanwhile, the hydrophobic nanocellulose is added, the stability of an emulsion antifoaming agent is not influenced, and the good stability is still achieved.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of sugarcane leaves, in particular to a preparation method and application of hydrophobically modified nano-cellulose of sugarcane leaves. Background technique [0002] As one of the wastes of the sugar industry, sugarcane leaves account for about 15-20% of the weight of the whole sugarcane. They are rich in cellulose, sugar, protein and other substances, and are gradually processed and used in other fields. Sugarcane leaves can be used as feed additives to reduce costs, can also be crushed and returned to the field to improve soil fertility, and can also be made into biogas and used in various fields. However, there are few studies on the further processing of sugarcane leaf cellulose into nanocellulose and its application in other fields. Contents of the invention [0003] The present invention aims at the deficiencies of the prior art, and provides an alkaline hydrogen peroxide metho...

Claims

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Application Information

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IPC IPC(8): C08B3/00B01D19/04
CPCB01D19/0404C08B3/00
Inventor 张思原李玉铭杜瑜欣高焌茹李宏
Owner GUANGXI UNIV
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