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Nano cellulose extracted from shuck of xanthoceras sorbifolia and extraction method

A technology of nano-cellulose and cellulose fibers, which can be used in the fields of fiber raw material processing, textiles and papermaking, and can solve the problem of resource utilization of sorbiflora sorbifolium residues

Active Publication Date: 2014-05-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for extracting nano-cellulose from X. sorbifolia husk, which provides a way to solve the problem of resource utilization of X.

Method used

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  • Nano cellulose extracted from shuck of xanthoceras sorbifolia and extraction method
  • Nano cellulose extracted from shuck of xanthoceras sorbifolia and extraction method
  • Nano cellulose extracted from shuck of xanthoceras sorbifolia and extraction method

Examples

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Embodiment 1

[0018] Take 100g of crushed sorbifolia husks and immerse them in 5% sodium hydroxide solution for 12 hours, then wash them repeatedly until the pH becomes neutral, then put them into an oven and dry them at 60°C. Submerge the treated sorbifolia husk in a mixed solution of toluene and ethanol with a volume ratio of 1:1, heat the solution to a slight boiling state, and keep it for 6 hours. The residue was repeatedly washed with ethanol, put into an oven, and dried at 60°C.

[0019] Put the treated sorbifolia husk into a mixed solution of hydrogen peroxide (30%) and acetic acid with a volume ratio of 1:1, heat to 60°C and keep it under stirring for 7 hours to perform lignin removal treatment. The residue was washed with deionized water and suction filtered until the filtrate was neutral. In order to ensure the complete reaction, the above delignification step was repeated once, and then the obtained product was heated to 80°C in 5% sodium hydroxide solution to react for 2 hours,...

Embodiment 2

[0022] Take 200g of crushed sorbifolia husks and immerse them in a 3% sodium hydroxide solution for 24 hours, then wash them repeatedly until the pH becomes neutral, then put them into an oven and dry them at 50°C. Submerge the treated sorbifolia husk in a mixed solution of toluene and ethanol with a volume ratio of 1:0.5, heat the solution to a slight boiling state, and keep it for 12 hours. The residue was repeatedly washed with ethanol, put into an oven, and dried at a temperature of 50°C.

[0023] Put the treated sorbifolia husk into a mixed solution of hydrogen peroxide (30%) and acetic acid with a volume ratio of 1:1, heat it to 50°C and keep it under stirring for 9 hours to perform lignin removal treatment. The residue was washed with deionized water and suction filtered until the filtrate was neutral. In order to ensure the complete reaction, the above delignification step was repeated twice, and then the obtained product was heated to 60°C in 3% sodium hydroxide solu...

Embodiment 3

[0026] Take 300g of crushed sorbifolia husks and immerse them in a 10% sodium hydroxide solution for 8 hours, then wash them repeatedly until the pH becomes neutral, then put them into an oven and dry them at 80°C. Submerge the treated sorbifolia husk in a mixed solution of toluene and ethanol with a volume ratio of 1:2, heat the solution to a slight boiling state, and keep it for 12 hours. The residue was repeatedly washed with ethanol, then put into an oven, and dried at 80°C.

[0027] Put the treated sorbifolia husk into a mixed solution of hydrogen peroxide (30%) and acetic acid with a volume ratio of 1:2, heat it to 60°C and keep it under stirring for 12 hours to perform lignin removal treatment. The residue was washed with deionized water and suction filtered until the filtrate was neutral. In order to ensure the complete reaction, the above delignification step was repeated 3 times, and then the product obtained was heated to 80°C in 8% sodium hydroxide solution to rea...

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Abstract

The invention relates to a method for extracting nano cellulose from shuck of xanthoceras sorbifolia, which comprises the steps of alkali treatment, wax removal treatment, lignin removal treatment and hydrolysis. The method comprises the following steps: immersing the crushed shuck of xanthoceras sorbifolia, washing to neutrality and drying; immersing the product in a mixed solution of toluene and ethanol, heating and keeping for a while, cleaning the residues by ethanol and drying; placing in a mixed solution of hydrogen peroxide and acetic acid, stirring and keeping for a while under heating condition, flushing the residues after a reaction is finished, pumping filtration until a filtrate presents neutral; heating the product in a sodium hydroxide solution, heating and reacting, pumping filtration and flushing until the filtrate presents neutral and then drying; adding in a sulfate solution, stirring and keeping for a while under heating condition, adding deionized water in a reaction container; placing the obtained fluid suspension in a high speed centrifuge for multitime separation, adding an aqueous alkali drop by drop for neutralizing if the fluid suspension is acidic, and finally drying through a freezing mode to obtain the nano cellulose powder extracted from shuck of xanthoceras sorbifolia.

Description

technical field [0001] The invention relates to the field of natural biological materials, and in particular provides nano cellulose of Xantho sorbifolium husk and a preparation method thereof. Background technique [0002] With the depletion of resources brought about by the development of human society and the increasingly prominent problems of environmental pollution, natural biomaterials have attracted widespread attention due to their renewability and biodegradability. [0003] Nanocellulose is a natural material with a nanoscale that is ubiquitous in cellulose-containing plants. The diameter of nanocellulose is generally below 100nm, and the length varies from 100nm to several microns. The morphology and properties of nanocellulose depend on the plant fibers from which nanocellulose is extracted. Nanocellulose has high hardness and modulus (Mandal and Chakrabarty2011), and the Young's modulus of crystal structure nanocellulose can even reach 138GPa (Nishino et al.199...

Claims

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Application Information

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IPC IPC(8): D21C5/00
Inventor 隋国鑫马娜刘冬艳林国明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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