Bamboo-sourced cellulose acetate and preparation method thereof

A cellulose acetate and cellulose technology, applied in the field of agricultural and forestry biological resources utilization, can solve the problems of difficult industrial application, great harm to the human body and the environment, and corrosion of metals, so as to improve the utilization value and ways, and the process is stable and controllable, Apply promising effects

Pending Publication Date: 2022-07-12
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the DBU catalyst is highly toxic and harmful to the human body and the environment; and DBU will corrode metals and cannot be stored in metal containers
DBU is also sensitive to air and carbon dioxide, which will limit the storage and use process, making industrial application difficult

Method used

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  • Bamboo-sourced cellulose acetate and preparation method thereof
  • Bamboo-sourced cellulose acetate and preparation method thereof
  • Bamboo-sourced cellulose acetate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 The acetylation reaction of chemical pretreatment bamboo substrate

[0038] The present embodiment provides a preparation method of bamboo-derived cellulose acetate, specifically:

[0039] 0.5 g of the substrate obtained after the pulverized bamboo is chemically pretreated with γ-valerolactone is dispersed in a round-bottomed flask containing 5 mL of dimethyl sulfoxide, and 2 mL of 200 g / L NaOH solution is added for activation for 30 min; then the flask is After being transferred to a water bath and heated in a water bath at 80° C. for 15 min, 10 mL of vinyl acetate and 0.1 mL of catalyst N,N-diisopropylethylamine were immediately added and the reaction was carried out for 5 min. After the end, the solid-liquid of the reaction mixture was centrifuged, and 50 mL of anhydrous ethanol was added to the separated supernatant to precipitate a white precipitate; the precipitated product was separated by filtration, and the solid filter residue was fully washed and...

Embodiment 2

[0040] The acetylation reaction of the bamboo cellulose of embodiment 2 separation and purification

[0041] The present embodiment provides a preparation method of bamboo-derived cellulose acetate. The difference between the specific steps and Example 1 is that the bamboo raw material is the bamboo cellulose obtained by purification after removing lignin and hemicellulose, and obtaining cellulose acetate B .

Embodiment 3

[0042] Embodiment 3 bamboo powder is directly the cellulose acetylation reaction of raw material

[0043] The present embodiment provides a preparation method of bamboo-derived cellulose acetate. The difference between the specific steps and Example 1 is only that the bamboo raw material is bamboo powder without any pretreatment to obtain cellulose acetate C.

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Abstract

The invention relates to the technical field of agriculture and forestry biological resource utilization, in particular to bamboo-sourced cellulose acetate and a preparation method thereof. The preparation method comprises the following steps: mixing a raw material containing bamboo cellulose with an organic solvent and an activating agent for primary reaction to prepare a reaction product; mixing the reaction product with an acetylation reagent and a catalyst for secondary reaction to generate cellulose acetate; and carrying out solid-liquid separation after the secondary reaction, and mixing the separated liquid with a precipitating agent to prepare the cellulose acetate. According to the method, the substance containing the bamboo cellulose is taken as the raw material, and the bamboo cellulose can be efficiently converted into cellulose acetate for further utilization through simple two-step reaction, so that the economic benefit of the bamboo cellulose is improved.

Description

technical field [0001] The invention relates to the technical field of agricultural and forestry biological resource utilization, in particular to a bamboo-derived cellulose acetate and a preparation method thereof. Background technique [0002] Cellulose acetate (also known as cellulose acetate, cellulose acetate) refers to the acetate of cellulose, which is a chemically modified polymer compound obtained after the hydroxyl group in the cellulose molecule is esterified with acetic acid. Cellulose acetate is a thermoplastic resin, and it is the earliest commercialized cellulose organic ester among cellulose derivatives and continues to develop. As a porous membrane material, cellulose acetate has the characteristics of high selectivity, large water permeability, simple processing, and natural degradation. Therefore, it has important applications in the fields of film base materials, aerospace materials and membrane materials. It is also a substitute for hydrolysis preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B3/06
CPCC08B3/06Y02P20/54
Inventor 李志强战雅微王美鑫马腾飞龙娟
Owner INT CENT FOR BAMBOO & RATTAN
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